jetgpio_example.cpp

/* Usage example of the JETGPIO library
 * Compile with: g++ -Wall -o jetgpio_example jetgpio_example.cpp -ljetgpio
 * Execute with: sudo ./jetgpio_example
 */

#include <iostream>
#include <unistd.h>
#include <jetgpio.h>

int main(int argc, char *argv[])
{
  int Init;

  Init = gpioInitialise();
  if (Init < 0)
    {
      /* jetgpio initialisation failed */
      printf("Jetgpio initialisation failed. Error code:  %d\n", Init);
      exit(Init);
    }
  else
    {
      /* jetgpio initialised okay*/
      printf("Jetgpio initialisation OK. Return code:  %d\n", Init);
    }	

  // Setting up pin 3 as OUTPUT and 7 as INPUT
  int stat1 = gpioSetMode(3, JET_OUTPUT);
  if (stat1 < 0)
    {
      /* gpio setting up failed */
      printf("gpio setting up failed. Error code:  %d\n", stat1);
      exit(Init);
    }
  else
    {
      /* gpio setting up okay*/
      printf("gpio setting up okay. Return code:  %d\n", stat1);
    }

  int stat2 = gpioSetMode(7, JET_INPUT);
  if (stat2 < 0)
    {
      /* gpio setting up failed */
      printf("gpio setting up failed. Error code:  %d\n", stat2);
      exit(Init);
    }
  else
    {
      /* gpio setting up okay*/
      printf("gpio setting up okay. Return code:  %d\n", stat2);
    }

  // Writing 1 and 0 to pin 3 at 1 second intervals while reading pin 7
  int x =0;
  int level = 0;
  while (x<5) {
    gpioWrite(3, 1);
    usleep(1000);
    level = gpioRead(7);
    printf("level: %d\n",level);
    sleep(1);
    gpioWrite(3, 0);
    usleep(1000);
    level = gpioRead(7);
    printf("level: %d\n",level);
    sleep(1);
    x++;
  }

  // Terminating library 
  gpioTerminate();

  exit(0);
	
}