Rename F1 examples folder.

examples/stm32f1/stm32-h103/button/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = button
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/button/button.c

@@ -0,0 +1,79 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
+ *               2010 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/nvic.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/exti.h>
+
+u16 exti_line_state;
+
+/* Set STM32 to 72 MHz. */
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+}
+
+void gpio_setup(void)
+{
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+void button_setup(void)
+{
+	/* Enable GPIOA clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+
+	/* Set GPIO0 (in GPIO port A) to 'input open-drain'. */
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
+		      GPIO_CNF_INPUT_FLOAT, GPIO0);
+
+}
+
+int main(void)
+{
+	int i;
+
+	clock_setup();
+	gpio_setup();
+	button_setup();
+
+	/* Blink the LED (PC12) on the board. */
+	while (1) {
+		gpio_toggle(GPIOC, GPIO12);
+
+		exti_line_state = GPIOA_IDR;
+		if ((exti_line_state & (1 << 0)) != 0) {
+			for (i = 0; i < 800000; i++)	/* Wait a bit. */
+				__asm__("nop");
+		}
+
+		for (i = 0; i < 800000; i++)	/* Wait a bit. */
+			__asm__("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/button/button.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/exti_both/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = exti_both
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/exti_both/exti_both.c

@@ -0,0 +1,92 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
+ *               2010 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/nvic.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/exti.h>
+
+u16 exti_line_state;
+
+/* Set STM32 to 72 MHz. */
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+}
+
+void gpio_setup(void)
+{
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+void exti_setup(void)
+{
+	/* Enable GPIOA clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+
+	/* Enable AFIO clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
+
+	/* Enable EXTI0 interrupt */
+	nvic_enable_irq(NVIC_EXTI0_IRQ);
+
+	/* Set GPIO0 (in GPIO port A) to 'input float'. */
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
+		      GPIO_CNF_INPUT_FLOAT, GPIO0);
+
+	/* configure EXTI subsystem */
+	exti_select_source(EXTI0, GPIOA);
+	exti_set_trigger(EXTI0, EXTI_TRIGGER_BOTH);
+	exti_enable_request(EXTI0);
+}
+
+void exti0_isr()
+{
+	exti_line_state = GPIOA_IDR;
+
+	if ((exti_line_state & (1 << 0)) != 0) {
+		gpio_clear(GPIOC, GPIO12);
+	} else {
+		gpio_set(GPIOC, GPIO12);
+	}
+
+	exti_reset_request(EXTI0);
+}
+
+int main(void)
+{
+
+	clock_setup();
+	gpio_setup();
+	exti_setup();
+
+	/* Blink the LED (PC12) on the board. */
+	while (1) {
+		__asm("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/exti_both/exti_both.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/exti_rising_falling/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = exti_rising_falling
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/exti_rising_falling/exti_rising_falling.c

@@ -0,0 +1,98 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
+ *               2010 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/nvic.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/exti.h>
+
+#define FALLING 0
+#define RISING 1
+
+u16 exti_direction = FALLING;
+
+/* Set STM32 to 72 MHz. */
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+}
+
+void gpio_setup(void)
+{
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+void exti_setup(void)
+{
+	/* Enable GPIOA clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+
+	/* Enable AFIO clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
+
+	/* Enable EXTI0 interrupt */
+	nvic_enable_irq(NVIC_EXTI0_IRQ);
+
+	/* Set GPIO0 (in GPIO port A) to 'input open-drain'. */
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
+		      GPIO_CNF_INPUT_FLOAT, GPIO0);
+
+	/* configure EXTI subsystem */
+	exti_select_source(EXTI0, GPIOA);
+	exti_direction = FALLING;
+	exti_set_trigger(EXTI0, EXTI_TRIGGER_FALLING);
+	exti_enable_request(EXTI0);
+}
+
+void exti0_isr()
+{
+	exti_reset_request(EXTI0);
+
+	if (exti_direction == FALLING) {
+		gpio_set(GPIOC, GPIO12);
+		exti_direction = RISING;
+		exti_set_trigger(EXTI0, EXTI_TRIGGER_RISING);
+	} else {
+		gpio_clear(GPIOC, GPIO12);
+		exti_direction = FALLING;
+		exti_set_trigger(EXTI0, EXTI_TRIGGER_FALLING);
+	}
+}
+
+int main(void)
+{
+
+	clock_setup();
+	gpio_setup();
+	exti_setup();
+
+	/* Blink the LED (PC12) on the board. */
+	while (1) {
+		__asm("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/exti_rising_falling/exti_rising_falling.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/fancyblink/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = fancyblink
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/fancyblink/README

@@ -0,0 +1,10 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is small LED blinking example program using libopencm3.
+
+It's intended for the ST STM32-based Olimex STM32-H103 eval board (see
+http://olimex.com/dev/stm32-h103.html for details). It should blink
+the LED on the board.
+

examples/stm32f1/stm32-h103/fancyblink/fancyblink.c

@@ -0,0 +1,55 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+/* Set STM32 to 72 MHz. */
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+}
+
+void gpio_setup(void)
+{
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+int main(void)
+{
+	int i;
+
+	clock_setup();
+	gpio_setup();
+
+	/* Blink the LED (PC12) on the board. */
+	while (1) {
+		gpio_toggle(GPIOC, GPIO12);	/* LED on/off */
+		for (i = 0; i < 800000; i++)	/* Wait a bit. */
+			__asm__("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/fancyblink/fancyblink.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/led_stripe/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = led_stripe
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/led_stripe/led_stripe.c

@@ -0,0 +1,234 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This example is implementing the protocol of ZJ168 addressable led
+ * strips. These strips use the LPD6803 controller. You may be able to
+ * find the datasheet here:
+ * http://www.adafruit.com/datasheets/LPD6803.pdf
+ */
+
+#include <stdlib.h>
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+#define SPI_BANK GPIOB
+#define SCLK_PIN GPIO13
+#define MOSI_PIN GPIO15
+
+#define SMALL_DELAY_VALUE 0
+
+#define COLOR_COUNT 50
+
+#define SCLK(VAL)				\
+	if (VAL) {				\
+		gpio_set(SPI_BANK, SCLK_PIN);	\
+	} else {				\
+		gpio_clear(SPI_BANK, SCLK_PIN);	\
+	}
+
+#define MOSI(VAL)				\
+	if (VAL) {				\
+		gpio_set(SPI_BANK, MOSI_PIN);	\
+	} else {				\
+		gpio_clear(SPI_BANK, MOSI_PIN);	\
+	}
+
+#define SMALL_DELAY() {				\
+		int j;				\
+		for (j = 0; j < SMALL_DELAY_VALUE; j++)	\
+			__asm__("nop");		\
+	}
+
+struct color {
+	u8 r;
+	u8 g;
+	u8 b;
+};
+
+/* Set STM32 to 72 MHz. */
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
+
+}
+
+void gpio_setup(void)
+{
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+	gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+	gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
+}
+
+void send_colors(struct color *colors, int count) {
+	int i, k;
+
+	/* initialize spi pins */
+	SCLK(0);
+	MOSI(0);
+
+	/* start frame */
+	for (i=0; i<32; i++) {
+		SCLK(1);
+		SMALL_DELAY();
+		SCLK(0);
+		SMALL_DELAY();
+	}
+
+	/* color cell output */
+	for (k = 0; k < count; k++) {
+		/* Start bit */
+		MOSI(1);
+		SCLK(1);
+		SMALL_DELAY();
+		SCLK(0);
+		SMALL_DELAY();
+
+		/* Blue */
+		for (i=0; i<5; i++) {
+			MOSI(((colors[k].b & ((1 << 4) >> i)) != 0));
+			SCLK(1);
+			SMALL_DELAY();
+			SCLK(0);
+			SMALL_DELAY();
+		}
+		/* Red */
+		for (i=0; i<5; i++) {
+			MOSI(((colors[k].r & ((1 << 4) >> i)) != 0));
+			SCLK(1);
+			SMALL_DELAY();
+			SCLK(0);
+			SMALL_DELAY();
+		}
+		/* Green */
+		for (i=0; i<5; i++) {
+			MOSI(((colors[k].g & ((1 << 4) >> i)) != 0));
+			SCLK(1);
+			SMALL_DELAY();
+			SCLK(0);
+			SMALL_DELAY();
+		}
+	}
+
+	/* End frame */
+	MOSI(0);
+	for (k=0; k < count; k++) {
+		SCLK(1);
+		SMALL_DELAY();
+		SCLK(0);
+		SMALL_DELAY();
+	}
+}
+
+void reset_colors(struct color *colors, int count) {
+	int i;
+
+	for (i=0; i<count; i++) {
+		colors[i].r = 0;
+		colors[i].g = 0;
+		colors[i].b = 0;
+	}
+}
+
+void init_colors(struct color *colors, int count) {
+
+	colors[0].r = 0x1F;
+	colors[0].g = 0;
+	colors[0].b = 0;
+	colors[1].r = 0;
+	colors[1].g = 0x1F;
+	colors[1].b = 0;
+	colors[2].r = 0;
+	colors[2].g = 0;
+	colors[2].b = 0x1F;
+
+	count = count;
+}
+
+void step_colors(struct color *colors, int count) {
+	int i;
+	struct color tmp_color1;
+	struct color tmp_color2;
+
+/* random blinking */
+/*
+	for (i=0; i<count; i++) {
+		colors[i].r = rand()&0x01;
+		colors[i].g = rand()&0x01;
+		colors[i].b = rand()&0x01;
+	}
+*/
+	/* generate next colors */
+
+	tmp_color1.r = colors[0].r;
+	tmp_color1.g = colors[0].g;
+	tmp_color1.b = colors[0].b;
+	colors[0].r = colors[count-1].r;
+	colors[0].g = colors[count-1].g;
+	colors[0].b = colors[count-1].b;
+	for(i=1; i<count; i++) {
+		tmp_color2.r = colors[i].r;
+		tmp_color2.g = colors[i].g;
+		tmp_color2.b = colors[i].b;
+		colors[i].r = tmp_color1.r;
+		colors[i].g = tmp_color1.g;
+		colors[i].b = tmp_color1.b;
+		tmp_color1.r = tmp_color2.r;
+		tmp_color1.g = tmp_color2.g;
+		tmp_color1.b = tmp_color2.b;
+	}
+
+}
+
+int main(void)
+{
+	int i;
+
+	struct color colors[COLOR_COUNT];
+
+	clock_setup();
+	gpio_setup();
+
+	reset_colors(colors, COLOR_COUNT);
+	init_colors(colors, COLOR_COUNT);
+
+	while (1) {
+		gpio_toggle(GPIOC, GPIO12);	/* LED on/off */
+
+		send_colors(colors, COLOR_COUNT);
+
+		step_colors(colors, COLOR_COUNT);
+
+		/* Wait a little */
+		for (i = 0; i < 1000000; i++)	/* Wait a bit. */
+			__asm__("nop");
+
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/led_stripe/led_stripe.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/miniblink/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = miniblink
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/miniblink/README

@@ -0,0 +1,10 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is the smallest-possible example program using libopencm3.
+
+It's intended for the ST STM32-based Olimex STM32-H103 eval board (see
+http://olimex.com/dev/stm32-h103.html for details). It should blink
+the LED on the board.
+

examples/stm32f1/stm32-h103/miniblink/miniblink.c

@@ -0,0 +1,71 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+void gpio_setup(void)
+{
+	/* Enable GPIOC clock. */
+	/* Manually: */
+	// RCC_APB2ENR |= RCC_APB2ENR_IOPCEN;
+	/* Using API functions: */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	/* Manually: */
+	// GPIOC_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((12 - 8) * 4) + 2));
+	// GPIOC_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((12 - 8) * 4));
+	/* Using API functions: */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+int main(void)
+{
+	int i;
+
+	gpio_setup();
+
+	/* Blink the LED (PC12) on the board. */
+	while (1) {
+		/* Manually: */
+		// GPIOC_BSRR = GPIO12;		/* LED off */
+		// for (i = 0; i < 800000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+		// GPIOC_BRR = GPIO12;		/* LED on */
+		// for (i = 0; i < 800000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+
+		/* Using API functions gpio_set()/gpio_clear(): */
+		// gpio_set(GPIOC, GPIO12);	/* LED off */
+		// for (i = 0; i < 800000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+		// gpio_clear(GPIOC, GPIO12);	/* LED on */
+		// for (i = 0; i < 800000; i++)	/* Wait a bit. */
+		// 	__asm__("nop");
+
+		/* Using API function gpio_toggle(): */
+		gpio_toggle(GPIOC, GPIO12);	/* LED on/off */
+		for (i = 0; i < 800000; i++)	/* Wait a bit. */
+			__asm__("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/miniblink/miniblink.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/pwm_6step/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = pwm_6step
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/pwm_6step/pwm_6step.c

@@ -0,0 +1,409 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/nvic.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/timer.h>
+#include <libopencm3/stm32/exti.h>
+
+#define FALLING 0
+#define RISING 1
+
+u16 exti_direction = FALLING;
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+}
+
+void gpio_setup(void)
+{
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/*
+	 * Set GPIO12 (PORTC) (led) to
+	 * 'output alternate function push-pull'.
+	 */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+
+}
+
+void exti_setup(void)
+{
+	/* Enable GPIOA clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+
+	/* Enable AFIO clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
+
+	/* Enable EXTI0 interrupt */
+	nvic_enable_irq(NVIC_EXTI0_IRQ);
+
+	/* Set GPIO0 (in GPIO port A) to 'input open-drain'. */
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
+		      GPIO_CNF_INPUT_FLOAT, GPIO0);
+
+	/* configure EXTI subsystem */
+	exti_select_source(EXTI0, GPIOA);
+	exti_direction = FALLING;
+	exti_set_trigger(EXTI0, EXTI_TRIGGER_FALLING);
+	exti_enable_request(EXTI0);
+}
+
+void exti0_isr()
+{
+	exti_reset_request(EXTI0);
+
+	if (exti_direction == FALLING) {
+		//gpio_toggle(GPIOA, GPIO12);
+		exti_direction = RISING;
+		exti_set_trigger(EXTI0, EXTI_TRIGGER_RISING);
+	} else {
+		//gpio_toggle(GPIOA, GPIO12);
+		timer_generate_event(TIM1, TIM_EGR_COMG);
+		exti_direction = FALLING;
+		exti_set_trigger(EXTI0, EXTI_TRIGGER_FALLING);
+	}
+}
+
+void tim_setup(void)
+{
+
+	/* Enable TIM1 clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_TIM1EN);
+
+	/* Enable GPIOA, GPIOB and Alternate Function clocks. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR,
+				    RCC_APB2ENR_IOPAEN |
+				    RCC_APB2ENR_IOPBEN |
+				    RCC_APB2ENR_AFIOEN);
+
+	/*
+	 * Set TIM1 chanel output pins to
+	 * 'output alternate function push-pull'.
+	 */
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL,
+		      GPIO_TIM1_CH1 |
+		      GPIO_TIM1_CH2 |
+		      GPIO_TIM1_CH3);
+
+	/*
+	 * Set TIM1 complementary chanel output pins to
+	 * 'output alternate function push-pull'.
+	 */
+	gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL,
+		      GPIO_TIM1_CH1N |
+		      GPIO_TIM1_CH2N |
+		      GPIO_TIM1_CH3N);
+
+	/* Enable TIM1 commutation interrupt. */
+	nvic_enable_irq(NVIC_TIM1_TRG_COM_IRQ);
+
+	/* Reset TIM1 peripheral */
+	timer_reset(TIM1);
+
+	/* Timer global mode:
+	 * - No divider
+	 * - alignment edge
+	 * - direction up
+	 */
+	timer_set_mode(TIM1, TIM_CR1_CKD_CK_INT,
+		       TIM_CR1_CMS_EDGE,
+		       TIM_CR1_DIR_UP);
+
+	/* Reset prescaler value. */
+	timer_set_prescaler(TIM1, 0);
+
+	/* Reset repetition counter value. */
+	timer_set_repetition_counter(TIM1, 0);
+
+	/* Enable preload. */
+	timer_enable_preload(TIM1);
+
+	/* Continous mode. */
+	timer_continuous_mode(TIM1);
+
+	/* Period (32kHz) */
+	timer_set_period(TIM1, 72000000 / 32000);
+
+	/* Configure break and deadtime */
+	timer_set_deadtime(TIM1, 10);
+	timer_set_enabled_off_state_in_idle_mode(TIM1);
+	timer_set_enabled_off_state_in_run_mode(TIM1);
+	timer_disable_break(TIM1);
+	timer_set_break_polarity_high(TIM1);
+	timer_disable_break_automatic_output(TIM1);
+	timer_set_break_lock(TIM1, TIM_BDTR_LOCK_OFF);
+
+	/* -- OC1 and OC1N configuration -- */
+
+	/* Disable outputs. */
+	timer_disable_oc_output(TIM1, TIM_OC1);
+	timer_disable_oc_output(TIM1, TIM_OC1N);
+
+	/* Configure global mode of line 1. */
+	timer_disable_oc_clear(TIM1, TIM_OC1);
+	timer_enable_oc_preload(TIM1, TIM_OC1);
+	timer_set_oc_slow_mode(TIM1, TIM_OC1);
+	timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_PWM1);
+
+	/* Configure OC1. */
+	timer_set_oc_polarity_high(TIM1, TIM_OC1);
+	timer_set_oc_idle_state_set(TIM1, TIM_OC1);
+
+	/* Configure OC1N. */
+	timer_set_oc_polarity_high(TIM1, TIM_OC1N);
+	timer_set_oc_idle_state_set(TIM1, TIM_OC1N);
+
+	/* Set the capture compare value for OC1. */
+	timer_set_oc_value(TIM1, TIM_OC1, 100);
+
+	/* Reenable outputs. */
+	timer_enable_oc_output(TIM1, TIM_OC1);
+	timer_enable_oc_output(TIM1, TIM_OC1N);
+
+	/* -- OC2 and OC2N configuration -- */
+
+	/* Disable outputs. */
+	timer_disable_oc_output(TIM1, TIM_OC2);
+	timer_disable_oc_output(TIM1, TIM_OC2N);
+
+	/* Configure global mode of line 2. */
+	timer_disable_oc_clear(TIM1, TIM_OC2);
+	timer_enable_oc_preload(TIM1, TIM_OC2);
+	timer_set_oc_slow_mode(TIM1, TIM_OC2);
+	timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_PWM1);
+
+	/* Configure OC2. */
+	timer_set_oc_polarity_high(TIM1, TIM_OC2);
+	timer_set_oc_idle_state_set(TIM1, TIM_OC2);
+
+	/* Configure OC2N. */
+	timer_set_oc_polarity_high(TIM1, TIM_OC2N);
+	timer_set_oc_idle_state_set(TIM1, TIM_OC2N);
+
+	/* Set the capture compare value for OC1. */
+	timer_set_oc_value(TIM1, TIM_OC2, 100);
+
+	/* Reenable outputs. */
+	timer_enable_oc_output(TIM1, TIM_OC2);
+	timer_enable_oc_output(TIM1, TIM_OC2N);
+
+	/* -- OC3 and OC3N configuration -- */
+
+	/* Disable outputs. */
+	timer_disable_oc_output(TIM1, TIM_OC3);
+	timer_disable_oc_output(TIM1, TIM_OC3N);
+
+	/* Configure global mode of line 3. */
+	timer_disable_oc_clear(TIM1, TIM_OC3);
+	timer_enable_oc_preload(TIM1, TIM_OC3);
+	timer_set_oc_slow_mode(TIM1, TIM_OC3);
+	timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_PWM1);
+
+	/* Configure OC3. */
+	timer_set_oc_polarity_high(TIM1, TIM_OC3);
+	timer_set_oc_idle_state_set(TIM1, TIM_OC3);
+
+	/* Configure OC3N. */
+	timer_set_oc_polarity_high(TIM1, TIM_OC3N);
+	timer_set_oc_idle_state_set(TIM1, TIM_OC3N);
+
+	/* Set the capture compare value for OC3. */
+	timer_set_oc_value(TIM1, TIM_OC3, 100);
+
+	/* Reenable outputs. */
+	timer_enable_oc_output(TIM1, TIM_OC3);
+	timer_enable_oc_output(TIM1, TIM_OC3N);
+
+	/* ---- */
+	/* ARR reload enable */
+	timer_enable_preload(TIM1);
+
+	/* Enable preload of complementary channel configurations and update on COM event */
+	timer_enable_preload_complementry_enable_bits(TIM1);
+
+	/* Enable outputs in the break subsystem */
+	timer_enable_break_main_output(TIM1);
+
+	/* Counter enable */
+	timer_enable_counter(TIM1);
+
+	/* Enable commutation interrupt */
+	timer_enable_irq(TIM1, TIM_DIER_COMIE);
+}
+
+void tim1_trg_com_isr(void)
+{
+	static int step = 0;
+
+	/* Clear the COM trigger interrupt flag. */
+	timer_clear_flag(TIM1, TIM_SR_COMIF);
+
+	/* A simplified and inefficient implementation of PWM On
+	 * scheme. Look at the implementation in Open-BLDC on
+	 * http://open-bldc.org for the proper implementation. This
+	 * one only serves as an example.
+	 *
+	 * Table of the pwm scheme zone configurations when driving:
+	 * @verbatim
+	 *  | 1| 2| 3| 4| 5| 6|
+	 * -+--+--+--+--+--+--+
+	 * A|p+|++|  |p-|--|  |
+	 * -+--+--+--+--+--+--+
+	 * B|  |p-|--|  |p+|++|
+	 * -+--+--+--+--+--+--+
+	 * C|--|  |p+|++|  |p-|
+	 * -+--+--+--+--+--+--+
+	 *  |  |  |  |  |  |  '- 360 Deg
+	 *  |  |  |  |  |  '---- 300 Deg
+	 *  |  |  |  |  '------- 240 Deg
+	 *  |  |  |  '---------- 180 Deg
+	 *  |  |  '------------- 120 Deg
+	 *  |  '----------------  60 Deg
+	 *  '-------------------   0 Deg
+	 *
+	 * Legend:
+	 * p+: PWM on the high side
+	 * p-: PWM on the low side
+	 * --: Low side on
+	 * ++: High side on
+	 *   : Floating/NC
+	 * @endverbatim
+	 */
+	switch (step) {
+	case 0: /* A PWM HIGH, B OFF, C LOW */
+		timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_PWM1);
+		timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_FROZEN);
+		timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_FORCE_LOW);
+
+		timer_enable_oc_output(TIM1, TIM_OC1);
+		timer_disable_oc_output(TIM1, TIM_OC1N);
+
+		timer_disable_oc_output(TIM1, TIM_OC2);
+		timer_disable_oc_output(TIM1, TIM_OC2N);
+
+		timer_enable_oc_output(TIM1, TIM_OC3);
+		timer_enable_oc_output(TIM1, TIM_OC3N);
+
+		step++;
+		break;
+	case 1: /* A HIGH, B PWM LOW, C OFF */
+		timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_FORCE_HIGH);
+		timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_PWM1);
+		timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_FROZEN);
+
+		timer_enable_oc_output(TIM1, TIM_OC1);
+		timer_enable_oc_output(TIM1, TIM_OC1N);
+
+		timer_disable_oc_output(TIM1, TIM_OC2);
+		timer_enable_oc_output(TIM1, TIM_OC2N);
+
+		timer_disable_oc_output(TIM1, TIM_OC3);
+		timer_disable_oc_output(TIM1, TIM_OC3N);
+
+		step++;
+		break;
+	case 2: /* A OFF, B LOW, C PWM HIGH */
+		timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_FROZEN);
+		timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_FORCE_LOW);
+		timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_PWM1);
+
+		timer_disable_oc_output(TIM1, TIM_OC1);
+		timer_disable_oc_output(TIM1, TIM_OC1N);
+
+		timer_enable_oc_output(TIM1, TIM_OC2);
+		timer_enable_oc_output(TIM1, TIM_OC2N);
+
+		timer_enable_oc_output(TIM1, TIM_OC3);
+		timer_disable_oc_output(TIM1, TIM_OC3N);
+
+		step++;
+		break;
+	case 3: /* A PWM LOW, B OFF, C HIGH */
+		timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_PWM1);
+		timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_FROZEN);
+		timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_FORCE_HIGH);
+
+		timer_disable_oc_output(TIM1, TIM_OC1);
+		timer_enable_oc_output(TIM1, TIM_OC1N);
+
+		timer_disable_oc_output(TIM1, TIM_OC2);
+		timer_disable_oc_output(TIM1, TIM_OC2N);
+
+		timer_enable_oc_output(TIM1, TIM_OC3);
+		timer_enable_oc_output(TIM1, TIM_OC3N);
+
+		step++;
+		break;
+	case 4: /* A LOW, B PWM HIGH, C OFF */
+		timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_FORCE_LOW);
+		timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_PWM1);
+		timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_FROZEN);
+
+		timer_enable_oc_output(TIM1, TIM_OC1);
+		timer_enable_oc_output(TIM1, TIM_OC1N);
+
+		timer_enable_oc_output(TIM1, TIM_OC2);
+		timer_disable_oc_output(TIM1, TIM_OC2N);
+
+		timer_disable_oc_output(TIM1, TIM_OC3);
+		timer_disable_oc_output(TIM1, TIM_OC3N);
+
+		step++;
+		break;
+	case 5: /* A OFF, B HIGH, C PWM LOW */
+		timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_FROZEN);
+		timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_FORCE_HIGH);
+		timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_PWM1);
+
+		timer_disable_oc_output(TIM1, TIM_OC1);
+		timer_disable_oc_output(TIM1, TIM_OC1N);
+
+		timer_enable_oc_output(TIM1, TIM_OC2);
+		timer_enable_oc_output(TIM1, TIM_OC2N);
+
+		timer_disable_oc_output(TIM1, TIM_OC3);
+		timer_enable_oc_output(TIM1, TIM_OC3N);
+
+		step=0;
+		break;
+	}
+	gpio_toggle(GPIOC, GPIO12);
+}
+
+int main(void)
+{
+	clock_setup();
+	gpio_setup();
+	tim_setup();
+	exti_setup();
+
+	while (1) {
+		__asm("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/pwm_6step/pwm_6step.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/spi/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = spi
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/spi/README

@@ -0,0 +1,8 @@
+-------------------------------------------------------------------------------
+README
+-------------------------------------------------------------------------------
+
+This example program repeatedly sends characters on SPI1 on the ST STM32-based
+Olimex STM32-H103 eval board (see http://olimex.com/dev/stm32-h103.html
+for details).
+

examples/stm32f1/stm32-h103/spi/spi.c

@@ -0,0 +1,50 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/spi.h>
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+}
+
+void spi_setup(void)
+{
+	/* TODO */
+}
+
+void gpio_setup(void)
+{
+	/* TODO */
+}
+
+int main(void)
+{
+	clock_setup();
+	gpio_setup();
+	spi_setup();
+
+	while (1) {
+		spi_write(SPI1, 0xaa);
+		spi_write(SPI1, 0x55);
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/spi/spi.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/timer/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = timer
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/timer/timer.c

@@ -0,0 +1,183 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/nvic.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/timer.h>
+#include <libopencm3/stm32/exti.h>
+
+u16 frequency_sequence[18] = {
+	1000,
+	500,
+	1000,
+	500,
+	1000,
+	500,
+	2000,
+	500,
+	2000,
+	500,
+	2000,
+	500,
+	1000,
+	500,
+	1000,
+	500,
+	1000,
+        5000
+};
+
+
+int frequency_sel = 0;
+
+u16 compare_time;
+u16 new_time;
+u16 frequency;
+int debug = 0;
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+}
+
+void gpio_setup(void)
+{
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/*
+	 * Set GPIO12 (PORTC) (led) to
+	 * 'output alternate function push-pull'.
+	 */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+
+	gpio_set(GPIOC, GPIO12);
+
+}
+
+void tim_setup(void)
+{
+
+	/* Enable TIM2 clock. */
+	rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_TIM2EN);
+
+
+	/* Enable TIM2 interrupt. */
+	nvic_enable_irq(NVIC_TIM2_IRQ);
+
+	/* Reset TIM2 peripheral */
+	timer_reset(TIM2);
+
+	/* Timer global mode:
+	 * - No divider
+	 * - alignment edge
+	 * - direction up
+	 */
+	timer_set_mode(TIM2, TIM_CR1_CKD_CK_INT,
+		       TIM_CR1_CMS_EDGE,
+		       TIM_CR1_DIR_UP);
+
+	/* Reset prescaler value. */
+	timer_set_prescaler(TIM2, 36000);
+
+	/* Enable preload. */
+	timer_disable_preload(TIM2);
+
+	/* Continous mode. */
+	timer_continuous_mode(TIM2);
+
+	/* Period (36kHz) */
+	timer_set_period(TIM2, 65535);
+
+	/* Disable outputs. */
+	timer_disable_oc_output(TIM2, TIM_OC1);
+	timer_disable_oc_output(TIM2, TIM_OC2);
+	timer_disable_oc_output(TIM2, TIM_OC3);
+	timer_disable_oc_output(TIM2, TIM_OC4);
+
+	/* -- OC1 configuration -- */
+
+	/* Configure global mode of line 1. */
+	timer_disable_oc_clear(TIM2, TIM_OC1);
+	timer_disable_oc_preload(TIM2, TIM_OC1);
+	timer_set_oc_slow_mode(TIM2, TIM_OC1);
+	timer_set_oc_mode(TIM2, TIM_OC1, TIM_OCM_FROZEN);
+
+	/* Set the capture compare value for OC1. */
+	timer_set_oc_value(TIM2, TIM_OC1, 1000);
+
+	/* ---- */
+	/* ARR reload enable */
+	timer_disable_preload(TIM2);
+
+	/* Counter enable */
+	timer_enable_counter(TIM2);
+
+	/* Enable commutation interrupt */
+	timer_enable_irq(TIM2, TIM_DIER_CC1IE);
+}
+
+void tim2_isr(void)
+{
+
+	if (timer_get_flag(TIM2, TIM_SR_CC1IF)) {
+
+		/* Clear compare interrupt flag. */
+		timer_clear_flag(TIM2, TIM_SR_CC1IF);
+
+		/*
+		 * Get current timer value to calculate next
+		 * compare register value
+		 */
+		compare_time = timer_get_counter(TIM2);
+
+		/*
+		 * Calculate and set the next compare value.
+		 */
+		frequency = frequency_sequence[frequency_sel++];
+		new_time = compare_time + frequency;
+
+		timer_set_oc_value(TIM2, TIM_OC1,
+				new_time);
+		if (frequency_sel == 18) {
+			frequency_sel = 0;
+		}
+
+		/* Toggle led to indicate compare event */
+		gpio_toggle(GPIOC, GPIO12);
+
+	}
+}
+
+int main(void)
+{
+
+	clock_setup();
+	gpio_setup();
+	tim_setup();
+
+	while (1) {
+		__asm("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/timer/timer.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/traceswo/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = traceswo
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/traceswo/README

@@ -0,0 +1,11 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This experimental program sends some characters on the TRACESWO pin using 
+the Instrumentation Trace Macrocell (ITM) and Trace Port Interface
+Unit (TPIU).
+
+The SWJ-DP port must be in SWD mode and not JTAG mode for the output
+to be visible.
+

examples/stm32f1/stm32-h103/traceswo/traceswo.c

@@ -0,0 +1,100 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+#include <libopencm3/stm32/dbgmcu.h>
+#include <libopencm3/cm3/scs.h>
+#include <libopencm3/cm3/tpiu.h>
+#include <libopencm3/cm3/itm.h>
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+}
+
+void trace_setup(void)
+{
+	/* Enable trace subsystem (we'll use ITM and TPIU) */
+	SCS_DEMCR |= SCS_DEMCR_TRCENA;
+
+	/* Use Manchester code for asynchronous transmission */
+	TPIU_SPPR = TPIU_SPPR_ASYNC_MANCHESTER;
+	TPIU_ACPR = 7;
+
+	/* Data width is 1 byte */
+	TPIU_CSPSR = TPIU_CSPSR_BYTE;
+
+	/* Formatter and flush control */
+	TPIU_FFCR &= ~TPIU_FFCR_ENFCONT;
+
+	/* Enable TRACESWO pin for async mode */
+	DBGMCU_CR = DBGMCU_CR_TRACE_IOEN | DBGMCU_CR_TRACE_MODE_ASYNC;
+
+	/* Unlock access to ITM registers */
+	/* FIXME: Magic numbers... Is this Cortex-M3 generic? */
+	*((volatile uint32_t*)0xE0000FB0) = 0xC5ACCE55;
+
+	/* Enable ITM with ID = 1 */
+	ITM_TCR = (1 << 16) | ITM_TCR_ITMENA;
+	/* Enable stimulus port 1 */
+	ITM_TER[0] = 1;	
+
+}
+
+void gpio_setup(void)
+{
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+void trace_send_blocking(char c)
+{
+	while(!(ITM_STIM[0] & ITM_STIM_FIFOREADY));
+	ITM_STIM[0] = c;
+}
+
+int main(void)
+{
+	int i, j = 0, c = 0;
+
+	clock_setup();
+	gpio_setup();
+	trace_setup();
+
+	/* Blink the LED (PC12) on the board with every transmitted byte. */
+	while (1) {
+		gpio_toggle(GPIOC, GPIO12);	/* LED on/off */
+		trace_send_blocking(c + '0'); 
+		c = (c == 9) ? 0 : c + 1;	/* Increment c. */
+		if ((j++ % 80) == 0) {		/* Newline after line full. */
+			trace_send_blocking('\r');
+			trace_send_blocking('\n');
+		}
+		for (i = 0; i < 800000; i++)	/* Wait a bit. */
+			__asm__("NOP");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/traceswo/traceswo.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usart/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usart
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usart/README

@@ -0,0 +1,13 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example program sends some characters on USART3 on the ST STM32-based
+Olimex STM32-H103 eval board (see http://olimex.com/dev/stm32-h103.html
+for details).
+
+The terminal settings for the receiving device/PC are 38400 8n1.
+
+The sending is done in a blocking way in the code, see the usart_irq example
+for a more elaborate USART example.
+

examples/stm32f1/stm32-h103/usart/usart.c

@@ -0,0 +1,119 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/usart.h>
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	/* Enable GPIOC clock. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_IOPCEN);
+
+	/* Enable clocks for GPIO port B (for GPIO_USART3_TX) and USART3. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
+	rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN | RCC_APB1ENR_USART3EN);
+}
+
+void usart_setup(void)
+{
+	/* Setup GPIO pin GPIO_USART1_TX. */
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+                      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
+
+	/* Setup UART parameters. */
+	usart_set_baudrate(USART1, 38400);
+	usart_set_databits(USART1, 8);
+	usart_set_stopbits(USART1, USART_STOPBITS_1);
+	usart_set_mode(USART1, USART_MODE_TX);
+	usart_set_parity(USART1, USART_PARITY_NONE);
+	usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
+
+	/* Finally enable the USART. */
+	usart_enable(USART1);
+
+	/* Setup GPIO pin GPIO_USART2_TX. */
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+                      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART2_TX);
+
+	/* Setup UART parameters. */
+	usart_set_baudrate(USART2, 38400);
+	usart_set_databits(USART2, 8);
+	usart_set_stopbits(USART2, USART_STOPBITS_1);
+	usart_set_mode(USART2, USART_MODE_TX);
+	usart_set_parity(USART2, USART_PARITY_NONE);
+	usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
+
+	/* Finally enable the USART. */
+	usart_enable(USART2);
+
+	/* Setup GPIO pin GPIO_USART3_TX/GPIO10 on GPIO port B for transmit. */
+	gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
+                      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART3_TX);
+
+	/* Setup UART parameters. */
+	usart_set_baudrate(USART3, 38400);
+	usart_set_databits(USART3, 8);
+	usart_set_stopbits(USART3, USART_STOPBITS_1);
+	usart_set_mode(USART3, USART_MODE_TX);
+	usart_set_parity(USART3, USART_PARITY_NONE);
+	usart_set_flow_control(USART3, USART_FLOWCONTROL_NONE);
+
+	/* Finally enable the USART. */
+	usart_enable(USART3);
+}
+
+void gpio_setup(void)
+{
+	/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+int main(void)
+{
+	int i, j = 0, c = 0;
+
+	clock_setup();
+	gpio_setup();
+	usart_setup();
+
+	/* Blink the LED (PC12) on the board with every transmitted byte. */
+	while (1) {
+		gpio_toggle(GPIOC, GPIO12);	/* LED on/off */
+		usart_send_blocking(USART1, c + '0'); /* USART1: Send byte. */
+		usart_send_blocking(USART2, c + '0'); /* USART2: Send byte. */
+		usart_send_blocking(USART3, c + '0'); /* USART3: Send byte. */
+		c = (c == 9) ? 0 : c + 1;	/* Increment c. */
+		if ((j++ % 80) == 0) {		/* Newline after line full. */
+			usart_send_blocking(USART1, '\r');
+			usart_send_blocking(USART1, '\n');
+			usart_send_blocking(USART2, '\r');
+			usart_send_blocking(USART2, '\n');
+			usart_send_blocking(USART3, '\r');
+			usart_send_blocking(USART3, '\n');
+		}
+		for (i = 0; i < 800000; i++)	/* Wait a bit. */
+			__asm__("NOP");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/usart/usart.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usart_irq/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usart_irq
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usart_irq/usart_irq.c

@@ -0,0 +1,119 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/usart.h>
+#include <libopencm3/stm32/nvic.h>
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	/* Enable GPIOA clock (for LED GPIOs). */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN |
+				RCC_APB2ENR_AFIOEN |
+				RCC_APB2ENR_USART1EN);
+}
+
+void usart_setup(void)
+{
+	/* Enable the USART1 interrupt. */
+	nvic_enable_irq(NVIC_USART1_IRQ);
+
+	/* Setup GPIO pin GPIO_USART1_RE_TX on GPIO port B for transmit. */
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+                      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
+
+	/* Setup GPIO pin GPIO_USART1_RE_RX on GPIO port B for receive. */
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
+		      GPIO_CNF_INPUT_FLOAT, GPIO_USART1_RX);
+
+	/* Setup UART parameters. */
+	usart_set_baudrate(USART1, 230400);
+	usart_set_databits(USART1, 8);
+	usart_set_stopbits(USART1, USART_STOPBITS_1);
+	usart_set_parity(USART1, USART_PARITY_NONE);
+	usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
+	usart_set_mode(USART1, USART_MODE_TX_RX);
+
+	/* Enable USART1 Receive interrupt. */
+	USART_CR1(USART1) |= USART_CR1_RXNEIE;
+
+	/* Finally enable the USART. */
+	usart_enable(USART1);
+}
+
+void gpio_setup(void)
+{
+	gpio_set(GPIOC, GPIO12);
+
+	/* Setup GPIO6 and 7 (in GPIO port A) for led use. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+void usart1_isr(void)
+{
+	static u8 data = 'A';
+
+	/* Check if we were called because of RXNE. */
+	if (((USART_CR1(USART1) & USART_CR1_RXNEIE) != 0) &&
+		((USART_SR(USART1) & USART_SR_RXNE) != 0)) {
+
+		/* Indicate that we got data. */
+		gpio_toggle(GPIOC, GPIO12);
+
+		/* Retrieve the data from the peripheral. */
+		data = usart_recv(USART1);
+
+		/* Enable transmit interrupt so it sends back the data. */
+		USART_CR1(USART1) |= USART_CR1_TXEIE;
+	}
+
+	/* Check if we were called because of TXE. */
+	if (((USART_CR1(USART1) & USART_CR1_TXEIE) != 0) &&
+		((USART_SR(USART1) & USART_SR_TXE) != 0)) {
+
+		/* Indicate that we are sending out data. */
+		//gpio_toggle(GPIOA, GPIO7);
+
+		/* Put data into the transmit register. */
+		usart_send(USART1, data);
+
+		/* Disable the TXE interrupt as we don't need it anymore. */
+		USART_CR1(USART1) &= ~USART_CR1_TXEIE;
+	}
+}
+
+int main(void)
+{
+	clock_setup();
+	gpio_setup();
+	usart_setup();
+
+	/* Wait forever and do nothing. */
+	while (1)
+		__asm__("nop");
+
+	return 0;
+}

examples/stm32f1/stm32-h103/usart_irq/usart_irq.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Open-BLDC (STM32F103CBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usart_irq_printf/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usart_irq_printf
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usart_irq_printf/usart_irq_printf.c

@@ -0,0 +1,272 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
+ *               2011 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/usart.h>
+#include <libopencm3/stm32/nvic.h>
+#include <libopencm3/stm32/systick.h>
+
+#include <stdio.h>
+#include <errno.h>
+
+/******************************************************************************
+ * Simple ringbuffer implementation from open-bldc's libgovernor that
+ * you can find at:
+ * https://github.com/open-bldc/open-bldc/tree/master/source/libgovernor
+ ******************************************************************************/
+
+typedef s32 ring_size_t;
+
+struct ring {
+        u8 *data;
+        ring_size_t size;
+        u32 begin;
+        u32 end;
+};
+
+#define RING_SIZE(RING) ((RING)->size - 1)
+#define RING_DATA(RING) (RING)->data
+#define RING_EMPTY(RING) ((RING)->begin == (RING)->end)
+
+void ring_init(struct ring *ring, u8 * buf, ring_size_t size)
+{
+        ring->data = buf;
+        ring->size = size;
+        ring->begin = 0;
+        ring->end = 0;
+}
+
+s32 ring_write_ch(struct ring *ring, u8 ch)
+{
+        if (((ring->end + 1) % ring->size) != ring->begin) {
+                ring->data[ring->end++] = ch;
+                ring->end %= ring->size;
+                return (u32) ch;
+        }
+
+        return -1;
+}
+
+s32 ring_write(struct ring * ring, u8 * data, ring_size_t size)
+{
+        s32 i;
+
+        for (i = 0; i < size; i++) {
+                if (ring_write_ch(ring, data[i]) < 0) {
+                        return -i;
+                }
+        }
+
+        return i;
+}
+
+s32 ring_read_ch(struct ring * ring, u8 * ch)
+{
+        s32 ret = -1;
+
+        if (ring->begin != ring->end) {
+                ret = ring->data[ring->begin++];
+                ring->begin %= ring->size;
+                if (ch)
+                        *ch = ret;
+        }
+
+        return ret;
+}
+
+s32 ring_read(struct ring * ring, u8 * data, ring_size_t size)
+{
+        s32 i;
+
+        for (i = 0; i < size; i++) {
+                if (ring_read_ch(ring, data + i) < 0) {
+                        return i;
+                }
+        }
+
+        return -i;
+}
+
+/******************************************************************************
+ * The example implementation
+ ******************************************************************************/
+
+#define BUFFER_SIZE 1024
+
+struct ring output_ring;
+u8 output_ring_buffer[BUFFER_SIZE];
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	/* Enable GPIOA clock (for LED GPIOs). */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN |
+				RCC_APB2ENR_AFIOEN |
+				RCC_APB2ENR_USART1EN);
+}
+
+void usart_setup(void)
+{
+
+        /* Initialize output ring buffer */
+	ring_init(&output_ring, output_ring_buffer, BUFFER_SIZE);
+
+	/* Enable the USART1 interrupt. */
+	nvic_enable_irq(NVIC_USART1_IRQ);
+
+	/* Setup GPIO pin GPIO_USART1_RE_TX on GPIO port B for transmit. */
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+                      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
+
+	/* Setup GPIO pin GPIO_USART1_RE_RX on GPIO port B for receive. */
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
+		      GPIO_CNF_INPUT_FLOAT, GPIO_USART1_RX);
+
+	/* Setup UART parameters. */
+	usart_set_baudrate(USART1, 230400);
+	usart_set_databits(USART1, 8);
+	usart_set_stopbits(USART1, USART_STOPBITS_1);
+	usart_set_parity(USART1, USART_PARITY_NONE);
+	usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
+	usart_set_mode(USART1, USART_MODE_TX_RX);
+
+	/* Enable USART1 Receive interrupt. */
+	USART_CR1(USART1) |= USART_CR1_RXNEIE;
+
+	/* Finally enable the USART. */
+	usart_enable(USART1);
+}
+
+void gpio_setup(void)
+{
+	gpio_set(GPIOC, GPIO12);
+
+	/* Setup GPIO6 and 7 (in GPIO port A) for led use. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+void usart1_isr(void)
+{
+	/* Check if we were called because of RXNE. */
+	if (((USART_CR1(USART1) & USART_CR1_RXNEIE) != 0) &&
+		((USART_SR(USART1) & USART_SR_RXNE) != 0)) {
+
+		/* Indicate that we got data. */
+		gpio_toggle(GPIOC, GPIO12);
+
+		/* Retrieve the data from the peripheral. */
+		ring_write_ch(&output_ring, usart_recv(USART1));
+
+		/* Enable transmit interrupt so it sends back the data. */
+		USART_CR1(USART1) |= USART_CR1_TXEIE;
+	}
+
+	/* Check if we were called because of TXE. */
+	if (((USART_CR1(USART1) & USART_CR1_TXEIE) != 0) &&
+		((USART_SR(USART1) & USART_SR_TXE) != 0)) {
+
+		s32 data;
+
+		data = ring_read_ch(&output_ring, NULL);
+
+		if (data == -1) {
+			/* Disable the TXE interrupt as we don't need it anymore. */
+			USART_CR1(USART1) &= ~USART_CR1_TXEIE;
+		} else {
+			/* Put data into the transmit register. */
+			usart_send(USART1, data);
+		}
+	}
+}
+
+int _write (int file, char *ptr, int len)
+{
+	int ret;
+
+	if (file == 1) {
+		ret = ring_write(&output_ring, (u8 *)ptr, len);
+
+		if (ret < 0) ret = -ret;
+
+		USART_CR1(USART1) |= USART_CR1_TXEIE;
+
+		return ret;
+	}
+
+        errno = EIO;
+        return -1;
+}
+
+void systick_setup(void) {
+
+	/* 72MHz / 8 => 9000000 counts per second */
+	systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
+
+	/* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */
+	systick_set_reload(9000);
+
+	systick_interrupt_enable();
+
+	/* Start counting. */
+	systick_counter_enable();
+
+}
+
+void sys_tick_handler(void)
+{
+	static int counter = 0;
+	static float fcounter = 0.0;
+	static double dcounter = 0.0;
+
+	static u32 temp32 = 0;
+
+	temp32++;
+
+	/* We call this handler every 1ms so we are sending hello world every 10ms / 100Hz. */
+	if (temp32 == 10) {
+		printf("Hello World! %i %f %f\r\n", counter, fcounter, dcounter);
+		counter++;
+		fcounter+=0.01;
+		dcounter+=0.01;
+
+		temp32 = 0;
+	}
+}
+
+int main(void)
+{
+
+	clock_setup();
+	gpio_setup();
+	usart_setup();
+	systick_setup();
+
+	while (1) {
+		__asm__("nop");
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/usart_irq_printf/usart_irq_printf.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Open-BLDC (STM32F103CBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usart_printf/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usart_printf
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usart_printf/usart_printf.c

@@ -0,0 +1,108 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
+ *               2011 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/usart.h>
+#include <libopencm3/stm32/nvic.h>
+
+#include <stdio.h>
+#include <errno.h>
+
+void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	/* Enable GPIOA clock (for LED GPIOs). */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN |
+				RCC_APB2ENR_AFIOEN |
+				RCC_APB2ENR_USART1EN);
+}
+
+void usart_setup(void)
+{
+	/* Setup GPIO pin GPIO_USART1_RE_TX on GPIO port B for transmit. */
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
+                      GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
+
+	/* Setup UART parameters. */
+	usart_set_baudrate(USART1, 230400);
+	usart_set_databits(USART1, 8);
+	usart_set_stopbits(USART1, USART_STOPBITS_1);
+	usart_set_parity(USART1, USART_PARITY_NONE);
+	usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
+	usart_set_mode(USART1, USART_MODE_TX);
+
+	/* Finally enable the USART. */
+	usart_enable(USART1);
+}
+
+void gpio_setup(void)
+{
+	gpio_set(GPIOC, GPIO12);
+
+	/* Setup GPIO6 and 7 (in GPIO port A) for led use. */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
+}
+
+int _write (int file, char *ptr, int len)
+{
+        int i;
+
+	if (file == 1) {
+		for (i = 0; i < len; i++){
+			usart_send_blocking(USART1, ptr[i]);
+		}
+
+		return i;
+	}
+
+        errno = EIO;
+        return -1;
+}
+
+int main(void)
+{
+	int counter = 0;
+	float fcounter = 0.0;
+	double dcounter = 0.0;
+
+	clock_setup();
+	gpio_setup();
+	usart_setup();
+
+	/*
+	 * Write Hello World an integer, float and double all over
+	 * again while incrementing the numbers.
+	 */
+	while (1) {
+		gpio_toggle(GPIOC, GPIO12);
+		printf("Hello World! %i %f %f\r\n", counter, fcounter, dcounter);
+		counter++;
+		fcounter+=0.01;
+		dcounter+=0.01;
+	}
+
+	return 0;
+}

examples/stm32f1/stm32-h103/usart_printf/usart_printf.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Open-BLDC (STM32F103CBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usb_cdcacm/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = cdcacm
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usb_cdcacm/README

@@ -0,0 +1,7 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example implements a USB CDC-ACM device (aka Virtual Serial Port)
+to demonstrate the use of the USB device stack.
+

examples/stm32f1/stm32-h103/usb_cdcacm/cdcacm.c

@@ -0,0 +1,246 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/cdc.h>
+
+static const struct usb_device_descriptor dev = {
+        .bLength = USB_DT_DEVICE_SIZE,
+        .bDescriptorType = USB_DT_DEVICE,
+        .bcdUSB = 0x0200,
+        .bDeviceClass = USB_CLASS_CDC,
+        .bDeviceSubClass = 0,
+        .bDeviceProtocol = 0,
+        .bMaxPacketSize0 = 64,
+        .idVendor = 0x0483,
+        .idProduct = 0x5740,
+        .bcdDevice = 0x0200,
+        .iManufacturer = 1,
+        .iProduct = 2,
+        .iSerialNumber = 3,
+        .bNumConfigurations = 1,
+};
+
+/* This notification endpoint isn't implemented. According to CDC spec its 
+ * optional, but its absence causes a NULL pointer dereference in Linux cdc_acm 
+ * driver. */
+static const struct usb_endpoint_descriptor comm_endp[] = {{
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = 0x83,
+	.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
+	.wMaxPacketSize = 16,
+	.bInterval = 255,
+}};
+
+static const struct usb_endpoint_descriptor data_endp[] = {{
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = 0x01,
+	.bmAttributes = USB_ENDPOINT_ATTR_BULK,
+	.wMaxPacketSize = 64,
+	.bInterval = 1,
+}, {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = 0x82,
+	.bmAttributes = USB_ENDPOINT_ATTR_BULK,
+	.wMaxPacketSize = 64,
+	.bInterval = 1,
+}};
+
+static const struct {
+	struct usb_cdc_header_descriptor header;
+	struct usb_cdc_call_management_descriptor call_mgmt;
+	struct usb_cdc_acm_descriptor acm;
+	struct usb_cdc_union_descriptor cdc_union;
+} __attribute__((packed)) cdcacm_functional_descriptors = {
+	.header = {
+		.bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
+		.bDescriptorType = CS_INTERFACE,
+		.bDescriptorSubtype = USB_CDC_TYPE_HEADER,
+		.bcdCDC = 0x0110,
+	},
+	.call_mgmt = {
+		.bFunctionLength = 
+			sizeof(struct usb_cdc_call_management_descriptor),
+		.bDescriptorType = CS_INTERFACE,
+		.bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
+		.bmCapabilities = 0,
+		.bDataInterface = 1,
+	},
+	.acm = {
+		.bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
+		.bDescriptorType = CS_INTERFACE,
+		.bDescriptorSubtype = USB_CDC_TYPE_ACM,
+		.bmCapabilities = 0,
+	},
+	.cdc_union = {
+		.bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
+		.bDescriptorType = CS_INTERFACE,
+		.bDescriptorSubtype = USB_CDC_TYPE_UNION,
+		.bControlInterface = 0,
+		.bSubordinateInterface0 = 1, 
+	 }
+};
+
+static const struct usb_interface_descriptor comm_iface[] = {{
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = 0,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 1,
+	.bInterfaceClass = USB_CLASS_CDC,
+	.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
+	.bInterfaceProtocol = USB_CDC_PROTOCOL_AT,
+	.iInterface = 0,
+
+	.endpoint = comm_endp,
+
+	.extra = &cdcacm_functional_descriptors,
+	.extralen = sizeof(cdcacm_functional_descriptors)
+}};
+
+static const struct usb_interface_descriptor data_iface[] = {{
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = 1,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 2,
+	.bInterfaceClass = USB_CLASS_DATA,
+	.bInterfaceSubClass = 0,
+	.bInterfaceProtocol = 0,
+	.iInterface = 0,
+
+	.endpoint = data_endp,
+}};
+
+static const struct usb_interface ifaces[] = {{
+	.num_altsetting = 1,
+	.altsetting = comm_iface,
+}, {
+	.num_altsetting = 1,
+	.altsetting = data_iface,
+}};
+
+static const struct usb_config_descriptor config = {
+	.bLength = USB_DT_CONFIGURATION_SIZE,
+	.bDescriptorType = USB_DT_CONFIGURATION,
+	.wTotalLength = 0,
+	.bNumInterfaces = 2,
+	.bConfigurationValue = 1,
+	.iConfiguration = 0,
+	.bmAttributes = 0x80,
+	.bMaxPower = 0x32,
+
+	.interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+	"x",
+	"Black Sphere Technologies",
+	"CDC-ACM Demo",
+	"DEMO"
+};
+
+static int cdcacm_control_request(struct usb_setup_data *req, u8 **buf, 
+		u16 *len, void (**complete)(struct usb_setup_data *req))
+{
+	(void)complete;
+	(void)buf;
+
+	switch(req->bRequest) {
+	case USB_CDC_REQ_SET_CONTROL_LINE_STATE: {
+		/* This Linux cdc_acm driver requires this to be implemented 
+		 * even though it's optional in the CDC spec, and we don't 
+		 * advertise it in the ACM functional descriptor. */
+		char buf[10];
+		struct usb_cdc_notification *notif = (void*)buf;
+
+		/* We echo signals back to host as notification */
+		notif->bmRequestType = 0xA1;
+		notif->bNotification = USB_CDC_NOTIFY_SERIAL_STATE;
+		notif->wValue = 0;
+		notif->wIndex = 0;
+		notif->wLength = 2;
+		buf[8] = req->wValue & 3;
+		buf[9] = 0;
+		//usbd_ep_write_packet(0x83, buf, 10);
+		return 1;
+		}
+	case USB_CDC_REQ_SET_LINE_CODING: 
+		if(*len < sizeof(struct usb_cdc_line_coding)) 
+			return 0;
+
+		return 1;
+	}
+	return 0;
+}
+
+static void cdcacm_data_rx_cb(u8 ep)
+{
+	(void)ep;
+
+	char buf[64];
+	int len = usbd_ep_read_packet(0x01, buf, 64);
+	if(len) { 
+		usbd_ep_write_packet(0x82, buf, len);
+		buf[len] = 0;
+	}
+}
+
+static void cdcacm_set_config(u16 wValue)
+{
+	(void)wValue;
+
+	usbd_ep_setup(0x01, USB_ENDPOINT_ATTR_BULK, 64, cdcacm_data_rx_cb);
+	usbd_ep_setup(0x82, USB_ENDPOINT_ATTR_BULK, 64, NULL);
+	usbd_ep_setup(0x83, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL);
+
+	usbd_register_control_callback(
+				USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE, 
+				USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+				cdcacm_control_request);
+}
+
+int main(void)
+{
+	int i;
+
+        rcc_clock_setup_in_hsi_out_48mhz();
+
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	gpio_set(GPIOC, GPIO11);
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, 
+			GPIO_CNF_OUTPUT_PUSHPULL, GPIO11);
+
+	usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings);
+	usbd_register_set_config_callback(cdcacm_set_config);
+
+	for (i = 0; i < 0x800000; i++)
+		__asm__("nop");
+	gpio_clear(GPIOC, GPIO11);
+
+	while (1) 
+		usbd_poll();
+}

examples/stm32f1/stm32-h103/usb_cdcacm/cdcacm.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usb_dfu/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usbdfu
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usb_dfu/README

@@ -0,0 +1,7 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example implements a USB Device Firmware Upgrade (DFU) bootloader
+to demonstrate the use of the USB device stack.
+

examples/stm32f1/stm32-h103/usb_dfu/usbdfu.c

@@ -0,0 +1,270 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/flash.h>
+#include <libopencm3/stm32/scb.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/dfu.h>
+
+#define APP_ADDRESS	0x08002000
+
+/* Commands sent with wBlockNum == 0 as per ST implementation. */
+#define CMD_SETADDR	0x21 
+#define CMD_ERASE	0x41 
+
+/* We need a special large control buffer for this device: */
+u8 usbd_control_buffer[1024];
+
+static enum dfu_state usbdfu_state = STATE_DFU_IDLE;
+
+static struct {
+	u8 buf[sizeof(usbd_control_buffer)];
+	u16 len;
+	u32 addr;
+	u16 blocknum;
+} prog;
+
+const struct usb_device_descriptor dev = {
+        .bLength = USB_DT_DEVICE_SIZE,
+        .bDescriptorType = USB_DT_DEVICE,
+        .bcdUSB = 0x0200,
+        .bDeviceClass = 0,
+        .bDeviceSubClass = 0,
+        .bDeviceProtocol = 0,
+        .bMaxPacketSize0 = 64,
+        .idVendor = 0x0483,
+        .idProduct = 0xDF11,
+        .bcdDevice = 0x0200,
+        .iManufacturer = 1,
+        .iProduct = 2,
+        .iSerialNumber = 3,
+        .bNumConfigurations = 1,
+};
+
+const struct usb_dfu_descriptor dfu_function = {
+	.bLength = sizeof(struct usb_dfu_descriptor),
+	.bDescriptorType = DFU_FUNCTIONAL,
+	.bmAttributes = USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH,
+	.wDetachTimeout = 255,
+	.wTransferSize = 1024,
+	.bcdDFUVersion = 0x011A,
+};
+
+const struct usb_interface_descriptor iface = {
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = 0,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 0,
+	.bInterfaceClass = 0xFE, /* Device Firmware Upgrade */
+	.bInterfaceSubClass = 1,
+	.bInterfaceProtocol = 2,
+
+	/* The ST Microelectronics DfuSe application needs this string. 
+	 * The format isn't documented... */
+	.iInterface = 4,
+
+	.extra = &dfu_function,
+	.extralen = sizeof(dfu_function),
+};
+
+const struct usb_interface ifaces[] = {{
+	.num_altsetting = 1,
+	.altsetting = &iface,
+}};
+
+const struct usb_config_descriptor config = {
+	.bLength = USB_DT_CONFIGURATION_SIZE,
+	.bDescriptorType = USB_DT_CONFIGURATION,
+	.wTotalLength = 0,
+	.bNumInterfaces = 1,
+	.bConfigurationValue = 1,
+	.iConfiguration = 0,
+	.bmAttributes = 0xC0,
+	.bMaxPower = 0x32,
+
+	.interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+	"x",
+	"Black Sphere Technologies",
+	"DFU Demo",
+	"DEMO",
+	/* This string is used by ST Microelectronics' DfuSe utility */
+	"@Internal Flash   /0x08000000/8*001Ka,56*001Kg"
+};
+
+static u8 usbdfu_getstatus(u32 *bwPollTimeout)
+{
+	switch(usbdfu_state) {
+	case STATE_DFU_DNLOAD_SYNC:
+		usbdfu_state = STATE_DFU_DNBUSY; 
+		*bwPollTimeout = 100;
+		return DFU_STATUS_OK;
+
+	case STATE_DFU_MANIFEST_SYNC:
+		/* Device will reset when read is complete */
+		usbdfu_state = STATE_DFU_MANIFEST;
+		return DFU_STATUS_OK;
+
+	default:
+		return DFU_STATUS_OK;
+	}
+}
+
+static void usbdfu_getstatus_complete(struct usb_setup_data *req)
+{
+	int i;
+	(void)req;
+
+	switch(usbdfu_state) {
+	case STATE_DFU_DNBUSY:
+
+		flash_unlock();
+		if(prog.blocknum == 0) {
+			switch(prog.buf[0]) {
+			case CMD_ERASE:
+				flash_erase_page(*(u32*)(prog.buf+1));
+			case CMD_SETADDR:
+				prog.addr = *(u32*)(prog.buf+1);
+			}
+		} else {
+			u32 baseaddr = prog.addr + 
+				((prog.blocknum - 2) * 
+					dfu_function.wTransferSize);
+			for(i = 0; i < prog.len; i += 2) 
+				flash_program_half_word(baseaddr + i, 
+						*(u16*)(prog.buf+i));
+		}
+		flash_lock();
+
+		/* We jump straight to dfuDNLOAD-IDLE, 
+		 * skipping dfuDNLOAD-SYNC 
+		 */
+		usbdfu_state = STATE_DFU_DNLOAD_IDLE;
+		return;
+
+	case STATE_DFU_MANIFEST:
+		/* USB device must detach, we just reset... */
+		scb_reset_system();
+		return; /* Will never return */
+	default:
+		return;
+	}
+}
+
+static int usbdfu_control_request(struct usb_setup_data *req, u8 **buf, 
+		u16 *len, void (**complete)(struct usb_setup_data *req))
+{
+
+	if((req->bmRequestType & 0x7F) != 0x21) 
+		return 0; /* Only accept class request */
+
+	switch(req->bRequest) {
+	case DFU_DNLOAD:
+		if((len == NULL) || (*len == 0)) {
+			usbdfu_state = STATE_DFU_MANIFEST_SYNC;
+			return 1;
+		} else {
+			/* Copy download data for use on GET_STATUS */
+			prog.blocknum = req->wValue;
+			prog.len = *len;
+			memcpy(prog.buf, *buf, *len);
+			usbdfu_state = STATE_DFU_DNLOAD_SYNC;
+			return 1;
+		}
+	case DFU_CLRSTATUS:
+		/* Clear error and return to dfuIDLE */
+		if(usbdfu_state == STATE_DFU_ERROR)
+			usbdfu_state = STATE_DFU_IDLE;
+		return 1;
+	case DFU_ABORT:
+		/* Abort returns to dfuIDLE state */
+		usbdfu_state = STATE_DFU_IDLE;
+		return 1;
+	case DFU_UPLOAD:
+		/* Upload not supported for now */
+		return 0;
+	case DFU_GETSTATUS: {
+		u32 bwPollTimeout = 0; /* 24-bit integer in DFU class spec */
+
+		(*buf)[0] = usbdfu_getstatus(&bwPollTimeout);
+		(*buf)[1] = bwPollTimeout & 0xFF;
+		(*buf)[2] = (bwPollTimeout >> 8) & 0xFF;
+		(*buf)[3] = (bwPollTimeout >> 16) & 0xFF;
+		(*buf)[4] = usbdfu_state;
+		(*buf)[5] = 0;	/* iString not used here */
+		*len = 6;
+
+		*complete = usbdfu_getstatus_complete;
+
+		return 1;
+		}
+	case DFU_GETSTATE:
+		/* Return state with no state transision */
+		*buf[0] = usbdfu_state;
+		*len = 1;
+		return 1;
+	}
+
+	return 0;
+}
+
+int main(void)
+{
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+	if(!gpio_get(GPIOA, GPIO10)) {
+		/* Boot the application if it's valid */
+		if((*(volatile u32*)APP_ADDRESS & 0x2FFE0000) == 0x20000000) {
+			/* Set vector table base address */
+			SCB_VTOR = APP_ADDRESS & 0xFFFF;
+			/* Initialise master stack pointer */
+			asm volatile ("msr msp, %0"::"g"
+					(*(volatile u32*)APP_ADDRESS));
+			/* Jump to application */
+			(*(void(**)())(APP_ADDRESS + 4))();
+		}
+	}
+
+        rcc_clock_setup_in_hsi_out_48mhz();
+
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
+
+	AFIO_MAPR |= AFIO_MAPR_SWJ_CFG_JTAG_OFF_SW_ON;
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT, 0, GPIO15);
+
+	usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings);
+	usbd_set_control_buffer_size(sizeof(usbd_control_buffer));
+	usbd_register_control_callback(
+				USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+				USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+				usbdfu_control_request);
+
+	gpio_set(GPIOA, GPIO15);
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, 
+			GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
+
+	while (1) 
+		usbd_poll();
+}

examples/stm32f1/stm32-h103/usb_dfu/usbdfu.ld

@@ -0,0 +1,29 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 8K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 4K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usb_hid/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usbhid
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usb_hid/README

@@ -0,0 +1,7 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example implements a USB Human Interface Device (HID) 
+to demonstrate the use of the USB device stack.
+

examples/stm32f1/stm32-h103/usb_hid/usbhid.c

@@ -0,0 +1,272 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/systick.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/hid.h>
+
+/* Define this to include the DFU APP interface. */
+#define INCLUDE_DFU_INTERFACE
+
+#ifdef INCLUDE_DFU_INTERFACE
+#include <libopencm3/stm32/scb.h>
+#include <libopencm3/usb/dfu.h>
+#endif
+
+const struct usb_device_descriptor dev = {
+        .bLength = USB_DT_DEVICE_SIZE,
+        .bDescriptorType = USB_DT_DEVICE,
+        .bcdUSB = 0x0200,
+        .bDeviceClass = 0,
+        .bDeviceSubClass = 0,
+        .bDeviceProtocol = 0,
+        .bMaxPacketSize0 = 64,
+        .idVendor = 0x0483,
+        .idProduct = 0x5710,
+        .bcdDevice = 0x0200,
+        .iManufacturer = 1,
+        .iProduct = 2,
+        .iSerialNumber = 3,
+        .bNumConfigurations = 1,
+};
+
+/* I have no idea what this means.  I haven't read the HID spec. */
+static const u8 hid_report_descriptor[] = {
+	0x05, 0x01, 0x09, 0x02, 0xA1, 0x01, 0x09, 0x01,
+	0xA1, 0x00, 0x05, 0x09, 0x19, 0x01, 0x29, 0x03,
+	0x15, 0x00, 0x25, 0x01, 0x95, 0x03, 0x75, 0x01,
+	0x81, 0x02, 0x95, 0x01, 0x75, 0x05, 0x81, 0x01,
+	0x05, 0x01, 0x09, 0x30, 0x09, 0x31, 0x09, 0x38,
+	0x15, 0x81, 0x25, 0x7F, 0x75, 0x08, 0x95, 0x03,
+	0x81, 0x06, 0xC0, 0x09, 0x3c, 0x05, 0xff, 0x09,
+	0x01, 0x15, 0x00, 0x25, 0x01, 0x75, 0x01, 0x95,
+	0x02, 0xb1, 0x22, 0x75, 0x06, 0x95, 0x01, 0xb1,
+	0x01, 0xc0
+};
+
+static const struct {
+	struct usb_hid_descriptor hid_descriptor;
+	struct {
+		u8 bReportDescriptorType;
+		u16 wDescriptorLength;
+	} __attribute__((packed)) hid_report;
+} __attribute__((packed)) hid_function = {
+	.hid_descriptor = {
+		.bLength = sizeof(hid_function),
+		.bDescriptorType = USB_DT_HID,
+		.bcdHID = 0x0100,
+		.bCountryCode = 0,
+		.bNumDescriptors = 1,
+	},
+	.hid_report = {
+		.bReportDescriptorType = USB_DT_REPORT,
+		.wDescriptorLength = sizeof(hid_report_descriptor),
+	}
+};
+
+const struct usb_endpoint_descriptor hid_endpoint = {
+	.bLength = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = 0x81,
+	.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
+	.wMaxPacketSize = 4,
+	.bInterval = 0x20,
+};
+
+const struct usb_interface_descriptor hid_iface = {
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = 0,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 1,
+	.bInterfaceClass = USB_CLASS_HID,
+	.bInterfaceSubClass = 1, /* boot */
+	.bInterfaceProtocol = 2, /* mouse */
+	.iInterface = 0,
+
+	.endpoint = &hid_endpoint,
+
+	.extra = &hid_function,
+	.extralen = sizeof(hid_function),
+};
+
+#ifdef INCLUDE_DFU_INTERFACE
+const struct usb_dfu_descriptor dfu_function = {
+	.bLength = sizeof(struct usb_dfu_descriptor),
+	.bDescriptorType = DFU_FUNCTIONAL,
+	.bmAttributes = USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH,
+	.wDetachTimeout = 255,
+	.wTransferSize = 1024,
+	.bcdDFUVersion = 0x011A,
+};
+
+const struct usb_interface_descriptor dfu_iface = {
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = 1,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 0,
+	.bInterfaceClass = 0xFE,
+	.bInterfaceSubClass = 1,
+	.bInterfaceProtocol = 1,
+	.iInterface = 0,
+
+	.extra = &dfu_function,
+	.extralen = sizeof(dfu_function),
+};
+#endif
+
+const struct usb_interface ifaces[] = {{
+	.num_altsetting = 1,
+	.altsetting = &hid_iface,
+#ifdef INCLUDE_DFU_INTERFACE
+}, {
+	.num_altsetting = 1,
+	.altsetting = &dfu_iface,
+#endif
+}};
+
+const struct usb_config_descriptor config = {
+	.bLength = USB_DT_CONFIGURATION_SIZE,
+	.bDescriptorType = USB_DT_CONFIGURATION,
+	.wTotalLength = 0,
+#ifdef INCLUDE_DFU_INTERFACE
+	.bNumInterfaces = 2,
+#else
+	.bNumInterfaces = 1,
+#endif
+	.bConfigurationValue = 1,
+	.iConfiguration = 0,
+	.bmAttributes = 0xC0,
+	.bMaxPower = 0x32,
+
+	.interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+	"x",
+	"Black Sphere Technologies",
+	"HID Demo",
+	"DEMO",
+};
+
+static int hid_control_request(struct usb_setup_data *req, u8 **buf, u16 *len,
+			void (**complete)(struct usb_setup_data *req))
+{
+	(void)complete;
+
+	if((req->bmRequestType != 0x81) || 
+	   (req->bRequest != USB_REQ_GET_DESCRIPTOR) ||
+	   (req->wValue != 0x2200)) 
+		return 0; 
+
+	/* Handle the HID report descriptor */
+	*buf = (u8*)hid_report_descriptor;
+	*len = sizeof(hid_report_descriptor);
+
+	return 1;
+}
+
+#ifdef INCLUDE_DFU_INTERFACE
+static void dfu_detach_complete(struct usb_setup_data *req)
+{
+	(void)req;
+
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT, 0, GPIO15);
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, 
+			GPIO_CNF_OUTPUT_PUSHPULL, GPIO10);
+	gpio_set(GPIOA, GPIO10);
+	scb_reset_core();
+}
+
+static int dfu_control_request(struct usb_setup_data *req, u8 **buf, u16 *len,
+			void (**complete)(struct usb_setup_data *req))
+{
+	(void)buf; 
+	(void)len;
+
+	if((req->bmRequestType != 0x21) || (req->bRequest != DFU_DETACH)) 
+		return 0; /* Only accept class request */
+
+	*complete = dfu_detach_complete;
+
+	return 1;
+}
+#endif
+
+static void hid_set_config(u16 wValue)
+{
+	(void)wValue;
+
+	usbd_ep_setup(0x81, USB_ENDPOINT_ATTR_INTERRUPT, 4, NULL);
+
+	usbd_register_control_callback(
+				USB_REQ_TYPE_STANDARD | USB_REQ_TYPE_INTERFACE,
+				USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+				hid_control_request);
+#ifdef INCLUDE_DFU_INTERFACE
+	usbd_register_control_callback(
+				USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+				USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+				dfu_control_request);
+#endif
+
+	systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8); 
+	systick_set_reload(100000);
+	systick_interrupt_enable();
+	systick_counter_enable();
+}
+
+int main(void)
+{
+        rcc_clock_setup_in_hsi_out_48mhz();
+
+
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	gpio_set(GPIOC, GPIO11);
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, 
+			GPIO_CNF_OUTPUT_PUSHPULL, GPIO11);
+
+	usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings);
+	usbd_register_set_config_callback(hid_set_config);
+
+	{int i; for (i=0;i<0x80000;i++);}
+	gpio_clear(GPIOC, GPIO11);
+
+	while (1) 
+		usbd_poll();
+}
+
+void sys_tick_handler(void)
+{
+	static int x = 0;
+	static int dir = 1;
+	u8 buf[4] = {0, 0, 0, 0};
+
+	buf[1] = dir;
+	x += dir;
+	if(x > 30) dir = -dir;
+	if(x < -30) dir = -dir;
+
+	usbd_ep_write_packet(0x81, buf, 4);
+}

examples/stm32f1/stm32-h103/usb_hid/usbhid.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+

examples/stm32f1/stm32-h103/usb_iap/Makefile

@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = usbiap
+
+include ../../Makefile.include
+

examples/stm32f1/stm32-h103/usb_iap/README

@@ -0,0 +1,8 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This example implements a USB bootloader for the Paparazzi project.
+
+TODO: Move to examples/lisa-m?
+

examples/stm32f1/stm32-h103/usb_iap/usbiap.c

@@ -0,0 +1,270 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/flash.h>
+#include <libopencm3/stm32/scb.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/dfu.h>
+
+#define APP_ADDRESS	0x08002000
+
+/* Commands sent with wBlockNum == 0 as per ST implementation. */
+#define CMD_SETADDR	0x21 
+#define CMD_ERASE	0x41 
+
+/* We need a special large control buffer for this device: */
+u8 usbd_control_buffer[1024];
+
+static enum dfu_state usbdfu_state = STATE_DFU_IDLE;
+
+static struct {
+	u8 buf[sizeof(usbd_control_buffer)];
+	u16 len;
+	u32 addr;
+	u16 blocknum;
+} prog;
+
+const struct usb_device_descriptor dev = {
+        .bLength = USB_DT_DEVICE_SIZE,
+        .bDescriptorType = USB_DT_DEVICE,
+        .bcdUSB = 0x0200,
+        .bDeviceClass = 0,
+        .bDeviceSubClass = 0,
+        .bDeviceProtocol = 0,
+        .bMaxPacketSize0 = 64,
+        .idVendor = 0x0483,
+        .idProduct = 0xDF11,
+        .bcdDevice = 0x0200,
+        .iManufacturer = 1,
+        .iProduct = 2,
+        .iSerialNumber = 3,
+        .bNumConfigurations = 1,
+};
+
+const struct usb_dfu_descriptor dfu_function = {
+	.bLength = sizeof(struct usb_dfu_descriptor),
+	.bDescriptorType = DFU_FUNCTIONAL,
+	.bmAttributes = USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH,
+	.wDetachTimeout = 255,
+	.wTransferSize = 1024,
+	.bcdDFUVersion = 0x011A,
+};
+
+const struct usb_interface_descriptor iface = {
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = 0,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 0,
+	.bInterfaceClass = 0xFE, /* Device Firmware Upgrade */
+	.bInterfaceSubClass = 1,
+	.bInterfaceProtocol = 2,
+
+	/* The ST Microelectronics DfuSe application needs this string. 
+	 * The format isn't documented... */
+	.iInterface = 4,
+
+	.extra = &dfu_function,
+	.extralen = sizeof(dfu_function),
+};
+
+const struct usb_interface ifaces[] = {{
+	.num_altsetting = 1,
+	.altsetting = &iface,
+}};
+
+const struct usb_config_descriptor config = {
+	.bLength = USB_DT_CONFIGURATION_SIZE,
+	.bDescriptorType = USB_DT_CONFIGURATION,
+	.wTotalLength = 0,
+	.bNumInterfaces = 1,
+	.bConfigurationValue = 1,
+	.iConfiguration = 0,
+	.bmAttributes = 0xC0,
+	.bMaxPower = 0x32,
+
+	.interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+	"x",
+	"Black Sphere Technologies",
+	"DFU Demo",
+	"DEMO",
+	/* This string is used by ST Microelectronics' DfuSe utility */
+	"@Internal Flash   /0x08000000/8*001Ka,56*001Kg"
+};
+
+static u8 usbdfu_getstatus(u32 *bwPollTimeout)
+{
+	switch(usbdfu_state) {
+	case STATE_DFU_DNLOAD_SYNC:
+		usbdfu_state = STATE_DFU_DNBUSY; 
+		*bwPollTimeout = 100;
+		return DFU_STATUS_OK;
+
+	case STATE_DFU_MANIFEST_SYNC:
+		/* Device will reset when read is complete */
+		usbdfu_state = STATE_DFU_MANIFEST;
+		return DFU_STATUS_OK;
+
+	default:
+		return DFU_STATUS_OK;
+	}
+}
+
+static void usbdfu_getstatus_complete(struct usb_setup_data *req)
+{
+	int i;
+	(void)req;
+
+	switch(usbdfu_state) {
+	case STATE_DFU_DNBUSY:
+
+		flash_unlock();
+		if(prog.blocknum == 0) {
+			switch(prog.buf[0]) {
+			case CMD_ERASE:
+				flash_erase_page(*(u32*)(prog.buf+1));
+			case CMD_SETADDR:
+				prog.addr = *(u32*)(prog.buf+1);
+			}
+		} else {
+			u32 baseaddr = prog.addr + 
+				((prog.blocknum - 2) * 
+					dfu_function.wTransferSize);
+			for(i = 0; i < prog.len; i += 2) 
+				flash_program_half_word(baseaddr + i, 
+						*(u16*)(prog.buf+i));
+		}
+		flash_lock();
+
+		/* We jump straight to dfuDNLOAD-IDLE, 
+		 * skipping dfuDNLOAD-SYNC 
+		 */
+		usbdfu_state = STATE_DFU_DNLOAD_IDLE;
+		return;
+
+	case STATE_DFU_MANIFEST:
+		/* USB device must detach, we just reset... */
+		scb_reset_system();
+		return; /* Will never return */
+	default:
+		return;
+	}
+}
+
+static int usbdfu_control_request(struct usb_setup_data *req, u8 **buf, 
+		u16 *len, void (**complete)(struct usb_setup_data *req))
+{
+
+	if((req->bmRequestType & 0x7F) != 0x21) 
+		return 0; /* Only accept class request */
+
+	switch(req->bRequest) {
+	case DFU_DNLOAD:
+		if((len == NULL) || (*len == 0)) {
+			usbdfu_state = STATE_DFU_MANIFEST_SYNC;
+			return 1;
+		} else {
+			/* Copy download data for use on GET_STATUS */
+			prog.blocknum = req->wValue;
+			prog.len = *len;
+			memcpy(prog.buf, *buf, *len);
+			usbdfu_state = STATE_DFU_DNLOAD_SYNC;
+			return 1;
+		}
+	case DFU_CLRSTATUS:
+		/* Clear error and return to dfuIDLE */
+		if(usbdfu_state == STATE_DFU_ERROR)
+			usbdfu_state = STATE_DFU_IDLE;
+		return 1;
+	case DFU_ABORT:
+		/* Abort returns to dfuIDLE state */
+		usbdfu_state = STATE_DFU_IDLE;
+		return 1;
+	case DFU_UPLOAD:
+		/* Upload not supported for now */
+		return 0;
+	case DFU_GETSTATUS: {
+		u32 bwPollTimeout = 0; /* 24-bit integer in DFU class spec */
+
+		(*buf)[0] = usbdfu_getstatus(&bwPollTimeout);
+		(*buf)[1] = bwPollTimeout & 0xFF;
+		(*buf)[2] = (bwPollTimeout >> 8) & 0xFF;
+		(*buf)[3] = (bwPollTimeout >> 16) & 0xFF;
+		(*buf)[4] = usbdfu_state;
+		(*buf)[5] = 0;	/* iString not used here */
+		*len = 6;
+
+		*complete = usbdfu_getstatus_complete;
+
+		return 1;
+		}
+	case DFU_GETSTATE:
+		/* Return state with no state transision */
+		*buf[0] = usbdfu_state;
+		*len = 1;
+		return 1;
+	}
+
+	return 0;
+}
+
+int main(void)
+{
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+	if(!gpio_get(GPIOA, GPIO10)) {
+		/* Boot the application if it's valid */
+		if((*(volatile u32*)APP_ADDRESS & 0x2FFE0000) == 0x20000000) {
+			/* Set vector table base address */
+			SCB_VTOR = APP_ADDRESS & 0xFFFF;
+			/* Initialise master stack pointer */
+			asm volatile ("msr msp, %0"::"g"
+					(*(volatile u32*)APP_ADDRESS));
+			/* Jump to application */
+			(*(void(**)())(APP_ADDRESS + 4))();
+		}
+	}
+
+        rcc_clock_setup_in_hsi_out_48mhz();
+
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
+
+	AFIO_MAPR |= AFIO_MAPR_SWJ_CFG_JTAG_OFF_SW_ON;
+	gpio_set_mode(GPIOA, GPIO_MODE_INPUT, 0, GPIO15);
+
+	usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings);
+	usbd_set_control_buffer_size(sizeof(usbd_control_buffer));
+	usbd_register_control_callback(
+				USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+				USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+				usbdfu_control_request);
+
+	gpio_set(GPIOA, GPIO15);
+	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, 
+			GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
+
+	while (1) 
+		usbd_poll();
+}

examples/stm32f1/stm32-h103/usb_iap/usbiap.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+