94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
|
|
* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@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/>.
|
|
*/
|
|
|
|
/**
|
|
* \addtogroup Examples
|
|
*
|
|
* Flashes the Red, Green and Blue diodes on the board, in order.
|
|
*
|
|
* RED controlled by PF1
|
|
* Green controlled by PF3
|
|
* Blue controlled by PF2
|
|
*/
|
|
|
|
#include <libopencm3/lm4f/systemcontrol.h>
|
|
#include <libopencm3/lm4f/gpio.h>
|
|
|
|
void gpio_setup(void)
|
|
{
|
|
SYSTEMCONTROL_RCGC2 |= 0x20; /* Enable GPIOF in run mode. */
|
|
const u32 outpins = ((1<<3) | (1<<2) | (1<<1));
|
|
|
|
GPIO_DIR(GPIOF) |= outpins; /* Configure outputs. */
|
|
GPIO_DEN(GPIOF) |= outpins; /* Enable digital function on outputs. */
|
|
}
|
|
|
|
#define FLASH_DELAY 800000
|
|
int main(void)
|
|
{
|
|
int i;
|
|
|
|
gpio_setup();
|
|
|
|
/* Blink STATUS LED (PF0) on the board. */
|
|
while (1) {
|
|
/*
|
|
* Flash the Red diode
|
|
*/
|
|
gpio_set(GPIOF, GPIO1);
|
|
|
|
for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
|
|
__asm__("nop");
|
|
|
|
gpio_clear(GPIOF, GPIO1);
|
|
|
|
for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
|
|
__asm__("nop");
|
|
|
|
/*
|
|
* Flash the Green diode
|
|
*/
|
|
gpio_set(GPIOF, GPIO3);
|
|
|
|
for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
|
|
__asm__("nop");
|
|
|
|
gpio_clear(GPIOF, GPIO3);
|
|
|
|
for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
|
|
__asm__("nop");
|
|
|
|
/*
|
|
* Flash the Blue diode
|
|
*/
|
|
gpio_set(GPIOF, GPIO2);
|
|
|
|
for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
|
|
__asm__("nop");
|
|
|
|
gpio_clear(GPIOF, GPIO2);
|
|
|
|
for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
|
|
__asm__("nop");
|
|
}
|
|
|
|
return 0;
|
|
}
|