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[stm32f429i-discovery] Added fancyblink example.

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For some reason when setting the ram size to 256 in the linker file we
are getting a memory access error. Needs more investigation.
This commit is contained in:
Piotr Esden-Tempski
2015-01-14 16:21:56 -08:00
parent 75389c665d
commit e8694d561f
4 changed files with 132 additions and 0 deletions
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25
examples/stm32/f4/stm32f429i-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 = ../stm32f429i-discovery.ld
include ../../Makefile.include

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

61
examples/stm32/f4/stm32f429i-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/rcc.h>
#include <libopencm3/stm32/gpio.h>
/* Set STM32 to 168 MHz. */
static void clock_setup(void)
{
rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);
/* Enable GPIOG clock. */
rcc_periph_clock_enable(RCC_GPIOG);
}
static void gpio_setup(void)
{
/* Set GPIO13-14 (in GPIO port G) to 'output push-pull'. */
gpio_mode_setup(GPIOG, GPIO_MODE_OUTPUT,
GPIO_PUPD_NONE, GPIO13 | GPIO14);
}
int main(void)
{
int i;
clock_setup();
gpio_setup();
/* Set two LEDs for wigwag effect when toggling. */
gpio_set(GPIOG, GPIO13);
/* Blink the LEDs (PG13 and PG14) on the board. */
while (1) {
/* Toggle LEDs. */
gpio_toggle(GPIOG, GPIO13 | GPIO14);
for (i = 0; i < 6000000; i++) { /* Wait a bit. */
__asm__("nop");
}
}
return 0;
}

33
examples/stm32/f4/stm32f429i-discovery/stm32f429i-discovery.ld 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>
* Copyright (C) 2015 Piotr Esden-Tempski <piotr@esden.net>
*
* 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 STM32F429IDISCOVERY (STM32F429ZI, 2048K flash, 256K RAM). */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 2048K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 128K /* (esden) This should be 256 but I get segfault. :( */
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f4.ld