52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/lm3s/systemcontrol.h>
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#include <libopencm3/lm3s/gpio.h>
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static void gpio_setup(void)
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{
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SYSTEMCONTROL_RCGC2 |= 0x04; /* Enable GPIOC in run mode. */
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GPIO_DIR(GPIOC) |= (1 << 5); /* Configure PC5 as output. */
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GPIO_DEN(GPIOC) |= (1 << 5); /* Enable digital function on PC5. */
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}
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int main(void)
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{
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int i;
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gpio_setup();
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/* Blink STATUS LED (PC5) on the board. */
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while (1) {
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gpio_set(GPIOC, GPIO5);
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for (i = 0; i < 800000; i++) /* Wait a bit. */
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__asm__("nop");
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gpio_clear(GPIOC, GPIO5);
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for (i = 0; i < 800000; i++) /* Wait a bit. */
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__asm__("nop");
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}
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return 0;
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}
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