/*
 * 8sw.c:
 *      Test program for GPIO 28,29,30,31 LED and Button board

 *      Gordon Henderson
 *
 * The board is laid out as follows:
 *
 * LEDs:      ( 17) (18) (19) (20)  (17) (18) (19) (20)
 *
 * Switches:     [0]      [ 1]       [ 2]      [ 3]
 *               [4]      [ 5]       [ 6]      [ 7]
 *
 * Numbers here are wiringPi pin numbers and will work on either
 * a Rev1 or Rev2 Raspberry Pi
 *
 ***********************************************************************
 */

#include <stdio.h>
#include <wiringPi.h>

static int leds [8]    = {  17, 18,  19, 20, 20, 19, 18, 17 } ;
static int buttons [8] = {  0,  1,  2,  3,  4,  5,  6 ,7 } ;

int main ()
{
  int i ;

  if (wiringPiSetup () < 0)
  {
    fprintf (stderr, "Unable to initialise wiringPi\n") ;
    return 1 ;
  }

  for (i = 0 ; i < 8 ; ++i)
  {
    pinMode (leds    [i], OUTPUT) ;
    pinMode (buttons [i], INPUT) ;
    digitalWrite    (leds    [i], LOW) ;
    pullUpDnControl (buttons [i], PUD_UP) ;
  }

  for (;;)
    for (i = 0 ; i < 8 ; ++i)
      digitalWrite (leds [i], !digitalRead (buttons [i])) ;
}