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[stm32f429i-discovery] Added miniblink example.

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Piotr Esden-Tempski
2015-01-14 17:28:20 -08:00
parent a0d379f460
commit ae17f5a77b
3 changed files with 110 additions and 0 deletions
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25
examples/stm32/f4/stm32f429i-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 = ../stm32f429i-discovery.ld
include ../../Makefile.include

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examples/stm32/f4/stm32f429i-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 STM32F429IDISCOVERY eval board. It should blink
the GREEN LED on the board.
Board connections:
------------------
<none required>

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examples/stm32/f4/stm32f429i-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>
*
* 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>
static void gpio_setup(void)
{
/* Enable GPIOD clock. */
/* Manually: */
// RCC_AHB1ENR |= RCC_AHB1ENR_IOPGEN;
/* Using API functions: */
rcc_periph_clock_enable(RCC_GPIOG);
/* Set GPIO13 (in GPIO port G) to 'output push-pull'. */
/* Manually: */
// GPIOG_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << 2);
// GPIOG_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << 2);
/* Using API functions: */
gpio_mode_setup(GPIOG, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO13);
}
int main(void)
{
int i;
gpio_setup();
/* Blink the LED (PG13) on the board. */
while (1) {
/* Manually: */
// GPIOG_BSRR = GPIO13; /* LED off */
// for (i = 0; i < 1000000; i++) /* Wait a bit. */
// __asm__("nop");
// GPIOG_BRR = GPIO13; /* LED on */
// for (i = 0; i < 1000000; i++) /* Wait a bit. */
// __asm__("nop");
/* Using API functions gpio_set()/gpio_clear(): */
// gpio_set(GPIOG, GPIO13); /* LED off */
// for (i = 0; i < 1000000; i++) /* Wait a bit. */
// __asm__("nop");
// gpio_clear(GPIOG, GPIO13); /* LED on */
// for (i = 0; i < 1000000; i++) /* Wait a bit. */
// __asm__("nop");
/* Using API function gpio_toggle(): */
gpio_toggle(GPIOG, GPIO13); /* LED on/off */
for (i = 0; i < 1000000; i++) { /* Wait a bit. */
__asm__("nop");
}
}
return 0;
}