diff --git a/examples/stm32/f3/Makefile.include b/examples/stm32/f3/Makefile.include new file mode 100644 index 0000000..62df0a0 --- /dev/null +++ b/examples/stm32/f3/Makefile.include @@ -0,0 +1,154 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## Copyright (C) 2010 Piotr Esden-Tempski +## Copyright (C) 2011 Fergus Noble +## +## This library is free software: you can redistribute it and/or modify +## it under the terms of the GNU Lesser General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This library 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 Lesser General Public License for more details. +## +## You should have received a copy of the GNU Lesser General Public License +## along with this library. If not, see . +## + +PREFIX ?= arm-none-eabi +# PREFIX ?= arm-elf +CC = $(PREFIX)-gcc +LD = $(PREFIX)-gcc +OBJCOPY = $(PREFIX)-objcopy +OBJDUMP = $(PREFIX)-objdump +GDB = $(PREFIX)-gdb +FLASH = $(shell which st-flash) + +TOOLCHAIN_DIR ?= ../../../../../libopencm3 +ifeq ($(wildcard ../../../../../libopencm3/lib/libopencm3_stm32f3.a),) +ifneq ($(strip $(shell which $(CC))),) +TOOLCHAIN_DIR := $(shell dirname `which $(CC)`)/../$(PREFIX) +endif +else +ifeq ($(V),1) +$(info We seem to be building the example in the source directory. Using local library!) +endif +endif + +CFLAGS += -Os -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include \ + -fno-common -mcpu=cortex-m4 -mthumb \ + -mfloat-abi=hard -mfpu=fpv4-sp-d16 -MD -DSTM32F3 +LDSCRIPT ?= $(BINARY).ld +LDFLAGS += --static -lc -lnosys -L$(TOOLCHAIN_DIR)/lib \ + -L$(TOOLCHAIN_DIR)/lib/stm32/f3 \ + -T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections \ + -mthumb -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 +OBJS += $(BINARY).o + +OOCD ?= openocd +OOCD_INTERFACE ?= stlink-v2 +OOCD_BOARD ?= stm32f3discovery +# Black magic probe specific variables +# Set the BMP_PORT to a serial port and then BMP is used for flashing +BMP_PORT ?= + +# Be silent per default, but 'make V=1' will show all compiler calls. +ifneq ($(V),1) +Q := @ +NULL := 2>/dev/null +else +LDFLAGS += -Wl,--print-gc-sections +endif + +.SUFFIXES: .elf .bin .hex .srec .list .images +.SECONDEXPANSION: +.SECONDARY: + +all: images + +images: $(BINARY).images +flash: $(BINARY).stlink-flash + +%.images: %.bin %.hex %.srec %.list + @#echo "*** $* images generated ***" + +%.bin: %.elf + @#printf " OBJCOPY $(*).bin\n" + $(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin + +%.hex: %.elf + @#printf " OBJCOPY $(*).hex\n" + $(Q)$(OBJCOPY) -Oihex $(*).elf $(*).hex + +%.srec: %.elf + @#printf " OBJCOPY $(*).srec\n" + $(Q)$(OBJCOPY) -Osrec $(*).elf $(*).srec + +%.list: %.elf + @#printf " OBJDUMP $(*).list\n" + $(Q)$(OBJDUMP) -S $(*).elf > $(*).list + +%.elf: $(OBJS) $(LDSCRIPT) $(TOOLCHAIN_DIR)/lib/libopencm3_stm32f3.a + @#printf " LD $(subst $(shell pwd)/,,$(@))\n" + $(Q)$(LD) -o $(*).elf $(OBJS) -lopencm3_stm32f3 $(LDFLAGS) + +%.o: %.c Makefile + @#printf " CC $(subst $(shell pwd)/,,$(@))\n" + $(Q)$(CC) $(CFLAGS) -o $@ -c $< + +clean: + $(Q)rm -f *.o + $(Q)rm -f *.d + $(Q)rm -f *.elf + $(Q)rm -f *.bin + $(Q)rm -f *.hex + $(Q)rm -f *.srec + $(Q)rm -f *.list + +%.stlink-flash: %.bin + @printf " FLASH $<\n" + $(Q)$(FLASH) write $(*).bin 0x8000000 + + +ifeq ($(BMP_PORT),) +ifeq ($(OOCD_SERIAL),) +%.flash: %.hex + @printf " FLASH $<\n" + @# IMPORTANT: Don't use "resume", only "reset" will work correctly! + $(Q)$(OOCD) -s ${HOME}/local/share/openocd/scripts \ + -f interface/$(OOCD_INTERFACE).cfg \ + -f board/$(OOCD_BOARD).cfg \ + -c "init" -c "reset init" \ + -c "flash write_image erase $(*).hex" \ + -c "reset" \ + -c "shutdown" $(NULL) +else +%.flash: %.hex + @printf " FLASH $<\n" + @# IMPORTANT: Don't use "resume", only "reset" will work correctly! + $(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \ + -f board/$(OOCD_BOARD).cfg \ + -c "ft2232_serial $(OOCD_SERIAL)" \ + -c "init" -c "reset init" \ + -c "stm32x mass_erase 0" \ + -c "flash write_image $(*).hex" \ + -c "reset" \ + -c "shutdown" $(NULL) +endif +else +%.flash: %.elf + @echo " GDB $(*).elf (flash)" + $(Q)$(GDB) --batch \ + -ex 'target extended-remote $(BMP_PORT)' \ + -x $(TOOLCHAIN_DIR)/scripts/black_magic_probe_flash.scr \ + $(*).elf +endif + +.PHONY: images clean + +-include $(OBJS:.o=.d) + diff --git a/examples/stm32/f3/stm32f3-discovery/adc/Makefile b/examples/stm32/f3/stm32f3-discovery/adc/Makefile new file mode 100644 index 0000000..f87ddb7 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/adc/Makefile @@ -0,0 +1,24 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## This library is free software: you can redistribute it and/or modify +## it under the terms of the GNU Lesser General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This library 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 Lesser General Public License for more details. +## +## You should have received a copy of the GNU Lesser General Public License +## along with this library. If not, see . +## + +BINARY = adc + +LDSCRIPT = ../stm32f3-discovery.ld + +include ../../Makefile.include diff --git a/examples/stm32/f3/stm32f3-discovery/adc/README b/examples/stm32/f3/stm32f3-discovery/adc/README new file mode 100644 index 0000000..224f51f --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/adc/README @@ -0,0 +1,9 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This is the smallest-possible example program using libopencm3. + +It's intended for the ST STM32F3DISCOVERY eval board. It should read from the ADC1_IN1 (PA0) pin its voltage and print it in the LEDs. + + diff --git a/examples/stm32/f3/stm32f3-discovery/adc/adc.c b/examples/stm32/f3/stm32f3-discovery/adc/adc.c new file mode 100644 index 0000000..a5f078a --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/adc/adc.c @@ -0,0 +1,207 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Stephen Caudle + * Modified by Fernando Cortes + * modified by Guillermo Rivera + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +#include +#include +#include +#include + +#define LBLUE GPIOE, GPIO8 +#define LRED GPIOE, GPIO9 +#define LORANGE GPIOE, GPIO10 +#define LGREEN GPIOE, GPIO11 +#define LBLUE2 GPIOE, GPIO12 +#define LRED2 GPIOE, GPIO13 +#define LORANGE2 GPIOE, GPIO14 +#define LGREEN2 GPIOE, GPIO15 + +#define LD4 GPIOE, GPIO8 +#define LD3 GPIOE, GPIO9 +#define LD5 GPIOE, GPIO10 +#define LD7 GPIOE, GPIO11 +#define LD9 GPIOE, GPIO12 +#define LD10 GPIOE, GPIO13 +#define LD8 GPIOE, GPIO14 +#define LD6 GPIOE, GPIO15 + + +void adc_setup(void) { + //ADC + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_ADC12EN); + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPAEN); + //ADC + gpio_mode_setup(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO0); + gpio_mode_setup(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO1); + adc_off(ADC1); + adc_set_clk_prescale(ADC_CCR_CKMODE_DIV2); + adc_set_single_conversion_mode(ADC1); + adc_disable_external_trigger_regular(ADC1); + adc_set_right_aligned(ADC1); + /* We want to read the temperature sensor, so we have to enable it. */ + adc_enable_temperature_sensor(); + adc_set_sample_time_on_all_channels(ADC1, ADC_SMPR1_SMP_61DOT5CYC); + uint8_t channel_array[16]; + channel_array[0]=16; // Vts (Internal temperature sensor + channel_array[0]=1; //ADC1_IN1 (PA0) + adc_set_regular_sequence(ADC1, 1, channel_array); + adc_set_resolution(ADC1, ADC_CFGR_RES_12_BIT); + adc_power_on(ADC1); + + /* Wait for ADC starting up. */ + int i; + for (i = 0; i < 800000; i++) /* Wait a bit. */ + __asm__("nop"); + +} + +void usart_setup(void) { + /* Enable clocks for GPIO port A (for GPIO_USART2_TX) and USART2. */ + rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN); + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPAEN); + + /* Setup GPIO pin GPIO_USART2_TX/GPIO9 on GPIO port A for transmit. */ + gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2 | GPIO3); + gpio_set_af(GPIOA, GPIO_AF7, GPIO2| GPIO3); + + /* Setup UART parameters. */ + usart_set_baudrate(USART2, 115200); + usart_set_databits(USART2, 8); + usart_set_stopbits(USART2, USART_STOPBITS_1); + usart_set_mode(USART2, USART_MODE_TX_RX); + usart_set_parity(USART2, USART_PARITY_NONE); + usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE); + + /* Finally enable the USART. */ + usart_enable(USART2); +} + +void gpio_setup(void) +{ + /* Enable GPIOE clock. */ + /* Manually: */ + // RCC_AHB1ENR |= RCC_AHB1ENR_IOPDEN; + /* Using API functions: */ + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPEEN); + + + /* Set GPIO12 (in GPIO port E) to 'output push-pull'. */ + /* Manually: */ + //GPIOE_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((8 - 8) * 4) + 2)); + //GPIOE_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((8 - 8) * 4)); + /* Using API functions: */ + gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO8| GPIO9| GPIO10| GPIO11| GPIO12| GPIO13| GPIO14| GPIO15); +} + +void my_usart_print_int(uint32_t usart, int value) +{ + uint8_t i; + uint8_t nr_digits = 0; + char buffer[25]; + + if (value < 0) { + usart_send_blocking(usart, '-'); + value = value * -1; + } + + while (value > 0) { + buffer[nr_digits++] = "0123456789"[value % 10]; + value /= 10; + } + + for (i = nr_digits; i >= 0; i--) { + usart_send_blocking(usart, buffer[i]); + } + + usart_send_blocking(usart, '\r'); + usart_send_blocking(usart, '\n'); +} + +void clock_setup(void) { + /* + rcc_set_sysclk_source(RCC_CFGR_SW_HSI); //se cayo + rcc_wait_for_sysclk_status(HSI); + rcc_osc_off(PLL); + rcc_wait_for_osc_not_ready(PLL); + rcc_set_pll_source(RCC_CFGR_PLLSRC_HSI_DIV2); + rcc_set_main_pll_hsi(RCC_CFGR_PLLMUL_PLL_IN_CLK_X11); + rcc_osc_on(PLL); + rcc_wait_for_osc_ready(PLL); + rcc_set_hpre(RCC_CFGR_HPRE_DIV_NONE); + rcc_set_ppre2(RCC_CFGR_PPRE2_DIV_NONE); + rcc_set_ppre1(RCC_CFGR_PPRE1_DIV_2); + rcc_set_sysclk_source(RCC_CFGR_SW_PLL); //se cayo + rcc_wait_for_sysclk_status(PLL); + */ + //rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_44MHZ]); + rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_64MHZ]); +} + +int main(void) +{ + int i, j; + uint16_t temp, inc=0; + + clock_setup(); + gpio_setup(); + adc_setup(); + usart_setup(); + + /* Blink the LED (PC8) on the board. */ + while (1) { + /* Manually: */ + // GPIOD_BSRR = GPIO12; /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + // GPIOD_BRR = GPIO9; /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API functions gpio_set()/gpio_clear(): */ + //gpio_set(GPIOE, GPIO9); /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + //gpio_clear(GPIOE, GPIO9); /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API function gpio_toggle(): */ + gpio_toggle(LRED); + for (i = 0; i < 200000; i++) /* Wait a bit. */ + __asm__("nop"); + gpio_toggle(LRED); + for (i = 0; i < 200000; i++) /* Wait a bit. */ + __asm__("nop"); + adc_start_conversion_regular(ADC1); + while (!(adc_eoc(ADC1))); + temp=adc_read_regular(ADC1); + gpio_port_write(GPIOE, temp << 4); + my_usart_print_int(USART2, temp); + //usart_send_blocking(USART2, 'a'); + //usart_send_blocking(USART2, '\r'); + //usart_send_blocking(USART2, '\n'); + + inc++; + } + + return 0; +} + diff --git a/examples/stm32/f3/stm32f3-discovery/button/Makefile b/examples/stm32/f3/stm32f3-discovery/button/Makefile new file mode 100644 index 0000000..2ea7465 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/button/Makefile @@ -0,0 +1,25 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## This library is free software: you can redistribute it and/or modify +## it under the terms of the GNU Lesser General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This library 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 Lesser General Public License for more details. +## +## You should have received a copy of the GNU Lesser General Public License +## along with this library. If not, see . +## + +BINARY = button + +LDSCRIPT = ../stm32f3-discovery.ld + +include ../../Makefile.include + diff --git a/examples/stm32/f3/stm32f3-discovery/button/README b/examples/stm32/f3/stm32f3-discovery/button/README new file mode 100644 index 0000000..157328c --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/button/README @@ -0,0 +1,8 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This example blinks the green LED on the ST STM32F3DISCOVERY eval board. + +When you press the 'USER' button, the blinking is slower. + diff --git a/examples/stm32/f3/stm32f3-discovery/button/button.c b/examples/stm32/f3/stm32f3-discovery/button/button.c new file mode 100644 index 0000000..96d2e65 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/button/button.c @@ -0,0 +1,78 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann , + * Copyright (C) 2010 Piotr Esden-Tempski + * Copyright (C) 2011 Stephen Caudle + * Modified by Fernando Cortes + * modified by Guillermo Rivera + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +#include +#include + +uint16_t exti_line_state; + +/* Set STM32 to 64 MHz. */ +void clock_setup(void) +{ + rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_64MHZ]); +} + +void gpio_setup(void) +{ + /* Enable GPIOD clock. */ + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPEEN); + + /* Set GPIO12 (in GPIO port D) to 'output push-pull'. */ + gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, + GPIO_PUPD_NONE, GPIO8 | GPIO9 | GPIO10 | GPIO11); +} + +void button_setup(void) +{ + /* Enable GPIOA clock. */ + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPAEN); + + /* Set GPIO0 (in GPIO port A) to 'input open-drain'. */ + gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO0); +} + +int main(void) +{ + int i; + + clock_setup(); + button_setup(); + gpio_setup(); + + /* Blink the LED (PD12) on the board. */ + while (1) { + gpio_toggle(GPIOE, GPIO11); + + /* Upon button press, blink more slowly. */ + exti_line_state = GPIOA_IDR; + if ((exti_line_state & (1 << 0)) != 0) { + for (i = 0; i < 3000000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + for (i = 0; i < 1000000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + return 0; +} diff --git a/examples/stm32/f3/stm32f3-discovery/fancyblink/Makefile b/examples/stm32/f3/stm32f3-discovery/fancyblink/Makefile new file mode 100644 index 0000000..53e3561 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/fancyblink/Makefile @@ -0,0 +1,25 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## This library is free software: you can redistribute it and/or modify +## it under the terms of the GNU Lesser General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This library 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 Lesser General Public License for more details. +## +## You should have received a copy of the GNU Lesser General Public License +## along with this library. If not, see . +## + +BINARY = fancyblink + +LDSCRIPT = ../stm32f3-discovery.ld + +include ../../Makefile.include + diff --git a/examples/stm32/f3/stm32f3-discovery/fancyblink/README b/examples/stm32/f3/stm32f3-discovery/fancyblink/README new file mode 100644 index 0000000..ade0bf7 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/fancyblink/README @@ -0,0 +1,9 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This is the smallest-possible example program using libopencm3. + +It's intended for the ST STM32F3DISCOVERY eval board. It should blink +the LEDs on the board. + diff --git a/examples/stm32/f3/stm32f3-discovery/fancyblink/fancyblink.c b/examples/stm32/f3/stm32f3-discovery/fancyblink/fancyblink.c new file mode 100644 index 0000000..5fcb6e2 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/fancyblink/fancyblink.c @@ -0,0 +1,60 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Damjan Marion + * Copyright (C) 2011 Mark Panajotovic + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +#include +#include + +/* Set STM32 to 64 MHz. */ +void clock_setup(void) +{ + rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_64MHZ]); + + /* Enable GPIOE clock. */ + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPEEN); +} + +void gpio_setup(void) +{ + /* Set GPIO8-11 (in GPIO port E) to 'output push-pull'. */ + gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, + GPIO_PUPD_NONE, GPIO8 | GPIO9 | GPIO10 | GPIO11); +} + +int main(void) +{ + int i; + + clock_setup(); + gpio_setup(); + + /* Set two LEDs for wigwag effect when toggling. */ + gpio_set(GPIOE, GPIO8 | GPIO10); + + /* Blink the LEDs (PD8, PD9, PD10 and PD11) on the board. */ + while (1) { + /* Toggle LEDs. */ + gpio_toggle(GPIOE, GPIO8 | GPIO9 | GPIO10 | GPIO11); + for (i = 0; i < 1000000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + return 0; +} diff --git a/examples/stm32/f3/stm32f3-discovery/miniblink/Makefile b/examples/stm32/f3/stm32f3-discovery/miniblink/Makefile new file mode 100644 index 0000000..3573b42 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/miniblink/Makefile @@ -0,0 +1,25 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## This library is free software: you can redistribute it and/or modify +## it under the terms of the GNU Lesser General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This library 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 Lesser General Public License for more details. +## +## You should have received a copy of the GNU Lesser General Public License +## along with this library. If not, see . +## + +BINARY = miniblink + +LDSCRIPT = ../stm32f3-discovery.ld + +include ../../Makefile.include + diff --git a/examples/stm32/f3/stm32f3-discovery/miniblink/README b/examples/stm32/f3/stm32f3-discovery/miniblink/README new file mode 100644 index 0000000..788b25e --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/miniblink/README @@ -0,0 +1,9 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This is the smallest-possible example program using libopencm3. + +It's intended for the ST STM32F3DISCOVERY eval board. It should blink +the blue LED on the board. + diff --git a/examples/stm32/f3/stm32f3-discovery/miniblink/miniblink.c b/examples/stm32/f3/stm32f3-discovery/miniblink/miniblink.c new file mode 100644 index 0000000..a062b4d --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/miniblink/miniblink.c @@ -0,0 +1,74 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Stephen Caudle + * Modified by Fernando Cortes + * modified by Guillermo Rivera + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +#include +#include + +void gpio_setup(void) +{ + /* Enable GPIOE clock. */ + /* Manually: */ + // RCC_AHB1ENR |= RCC_AHB1ENR_IOPDEN; + /* Using API functions: */ + rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPEEN); + + /* Set GPIO12 (in GPIO port E) to 'output push-pull'. */ + /* Manually: */ + //GPIOE_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((8 - 8) * 4) + 2)); + //GPIOE_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((8 - 8) * 4)); + /* Using API functions: */ + gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO12); +} + +int main(void) +{ + int i, j; + + gpio_setup(); + + /* Blink the LED (PC8) on the board. */ + while (1) { + /* Manually: */ + // GPIOD_BSRR = GPIO12; /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + // GPIOD_BRR = GPIO9; /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API functions gpio_set()/gpio_clear(): */ + //gpio_set(GPIOE, GPIO9); /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + //gpio_clear(GPIOE, GPIO9); /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API function gpio_toggle(): */ + gpio_toggle(GPIOE, GPIO12); /* LED on/off */ + for (i = 0; i < 2000000; i++) /* Wait a bit. */ + __asm__("nop"); + + } + + return 0; +} diff --git a/examples/stm32/f3/stm32f3-discovery/stm32f3-discovery.ld b/examples/stm32/f3/stm32f3-discovery/stm32f3-discovery.ld new file mode 100644 index 0000000..1fdcc18 --- /dev/null +++ b/examples/stm32/f3/stm32f3-discovery/stm32f3-discovery.ld @@ -0,0 +1,32 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Stephen Caudle + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +/* Linker script for ST STM32F4DISCOVERY (STM32F407VG, 1024K flash, 128K RAM). */ + +/* Define memory regions. */ +MEMORY +{ + rom (rx) : ORIGIN = 0x08000000, LENGTH = 256K + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K +} + +/* Include the common ld script. */ +INCLUDE libopencm3_stm32f3.ld +