2477681c7d
The LM4F provides new registers for system control. Each peripheral now has its own clock gating control register. The LM4F still supports the legacy registers for backwards compatibility. Use SYSCTL_RCGCGPIO instead of SYSCTL_RCGC to enable the GPIO. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
93 lines
2.2 KiB
C
93 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)
|
|
{
|
|
SYSCTL_RCGCGPIO |= 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;
|
|
}
|