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stm32f3discovery examples added.

Browse Source 
- miniblink
- button
- fancyblink
- adc
- Non tested yet! But they compile.
This commit is contained in:
Federico Ruiz Ugalde
2013-06-26 05:12:36 -06:00
committed by Piotr Esden-Tempski
parent fb4cecd05e
commit 757d044c23
14 changed files with 739 additions and 0 deletions
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154
examples/stm32/f3/Makefile.include Normal file
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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
## Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
## Copyright (C) 2011 Fergus Noble <fergusnoble@gmail.com>
##
## 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 <http://www.gnu.org/licenses/>.
##
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)

24
examples/stm32/f3/stm32f3-discovery/adc/Makefile Normal file
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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## 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 <http://www.gnu.org/licenses/>.
##
BINARY = adc
LDSCRIPT = ../stm32f3-discovery.ld
include ../../Makefile.include

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examples/stm32/f3/stm32f3-discovery/adc/README Normal file
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------------------------------------------------------------------------------
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.

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examples/stm32/f3/stm32f3-discovery/adc/adc.c Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
* Modified by Fernando Cortes <fermando.corcam@gmail.com>
* modified by Guillermo Rivera <memogrg@gmail.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/f3/rcc.h>
#include <libopencm3/stm32/f3/adc.h>
#include <libopencm3/stm32/f3/usart.h>
#include <libopencm3/stm32/gpio.h>
#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;
}

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examples/stm32/f3/stm32f3-discovery/button/Makefile Normal file
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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## 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 <http://www.gnu.org/licenses/>.
##
BINARY = button
LDSCRIPT = ../stm32f3-discovery.ld
include ../../Makefile.include

8
examples/stm32/f3/stm32f3-discovery/button/README Normal file
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------------------------------------------------------------------------------
README
------------------------------------------------------------------------------
This example blinks the green LED on the ST STM32F3DISCOVERY eval board.
When you press the 'USER' button, the blinking is slower.

78
examples/stm32/f3/stm32f3-discovery/button/button.c Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
* Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
* Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
* Modified by Fernando Cortes <fermando.corcam@gmail.com>
* modified by Guillermo Rivera <memogrg@gmail.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
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;
}

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examples/stm32/f3/stm32f3-discovery/fancyblink/Makefile Normal file
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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## 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 <http://www.gnu.org/licenses/>.
##
BINARY = fancyblink
LDSCRIPT = ../stm32f3-discovery.ld
include ../../Makefile.include

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examples/stm32/f3/stm32f3-discovery/fancyblink/README Normal file
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------------------------------------------------------------------------------
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.

60
examples/stm32/f3/stm32f3-discovery/fancyblink/fancyblink.c Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Damjan Marion <damjan.marion@gmail.com>
* Copyright (C) 2011 Mark Panajotovic <marko@electrontube.org>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/f3/rcc.h>
#include <libopencm3/stm32/gpio.h>
/* 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;
}

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examples/stm32/f3/stm32f3-discovery/miniblink/Makefile Normal file
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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## 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 <http://www.gnu.org/licenses/>.
##
BINARY = miniblink
LDSCRIPT = ../stm32f3-discovery.ld
include ../../Makefile.include

9
examples/stm32/f3/stm32f3-discovery/miniblink/README Normal file
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------------------------------------------------------------------------------
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.

74
examples/stm32/f3/stm32f3-discovery/miniblink/miniblink.c Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
* Modified by Fernando Cortes <fermando.corcam@gmail.com>
* modified by Guillermo Rivera <memogrg@gmail.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/f3/rcc.h>
#include <libopencm3/stm32/gpio.h>
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;
}

32
examples/stm32/f3/stm32f3-discovery/stm32f3-discovery.ld Normal file
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@@ -0,0 +1,32 @@
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
/* 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