gpio_example_output.c

/*
 *  GPIO Example Output:
 *  The following is an example of using the GPIO library to configure a
 *  GPIO pin as an output as an output and toggle the pin high and low several
 *  times before leaving it high upon exit.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * Tested Setup:
 * Raspberry Pi GPIO PIN -->|
 *                          |
 *                          |
 *                         LED
 *                          |
 *                          |
 *                       RESISTOR
 *                          |
 *                          |
 * Raspberry Pi GND PIN  <--|
 *
 * RESISTOR = 470 R
 */     

#include <stdio.h>
#include <unistd.h>
#include "rpiGpio.h"

/* The pin to use as an output */
#define GPIO_PIN 25

int main(void)
{ 
    if (gpioSetup() != OK)
    {
        dbgPrint(DBG_INFO, "gpioSetup failed. Exiting\n");
        return 1;
    }
    
    gpioSetFunction(GPIO_PIN, output);

    gpioSetPin(GPIO_PIN, high);

    sleep(1);

    gpioSetPin(GPIO_PIN, low);

    sleep(1);

    gpioSetPin(GPIO_PIN, high);
 
    sleep(1);

    gpioSetPin(GPIO_PIN, low);
    
    sleep(1);

    gpioSetPin(GPIO_PIN, high);

    sleep(1);

    gpioCleanup();

    return 0;
}