gpio_example

GPIO Example

---

Path: ./src/examples/gpio_test/gpio_test.c

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#include "common/print_util.h"
#include "common/time_util.h"
#include "rpi/rpi_all.h"


#define pin_out PIN_07
#define pin_in PIN_08
#define pin_event PIN_10

int main(int argc, char **args)
{
    if (rpi_init() ==-1) {
        printf("initialization failed");
        return -1;
    }
    // Configure pin_in as input pin
    rpi_gpio_fsel(pin_in, RPI_GPIO_FSEL_IN);

    // Configure pin_out as output pin.
    rpi_gpio_fsel(pin_out, RPI_GPIO_FSEL_OUT);

    // Configure pin_event to detect rising edge event
    rpi_gpio_enable_Redge(pin_event);

    // Read pin_in and check it is LOW or HIGH
    if (rpi_gpio_read(pin_in) == LOW) {
        printf("PIN_07 is low, and we set PIN_08 as HIGH \n");
        // Set pin_out to be HIGH
        rpi_gpio_write(pin_out, HIGH);
    } else {
        printf("PIN_07 is high, and we set PIN_08 as LOW \n");
        // Set pin_out to be LOW
        rpi_gpio_write(pin_out, LOW);
    }

    timeutil_usleep(100000);

    while(1) {
        timeutil_usleep(10);
        // Check the event, if the rising edge event on pin_event happens,
        // we print out something.
        if (rpi_gpio_status(pin_event)) {
            printf("Capture the pin rising event \n");
        }
    }
    return 0;
}