io_shiled_test.c

#include <bcm2835.h>
#include <stdio.h>
#define LED1  5
#define LED2  6
#define LED3  13
#define LED4  26
#define LED5 12
#define COM 22
#define RELAY 27
#define PWM0 18
#define PWM1 19
#define IR_TX 25
#define IR_RX 17
#define DIP1 20 
#define DIP2 21
#define BUTTON1 24
#define BUTTON2 23
#define BUZZER 16
 
int main(int argc, char **argv)
{

  int i;
  int value1,value2,value3,value4;
    int led_array[]={LED2,LED4,LED3,LED5};
  int n=sizeof(led_array)/sizeof(led_array[0]);
    if (!bcm2835_init())
	return 1;

 

    // Set the p5in to be an output
	  bcm2835_gpio_fsel(COM, BCM2835_GPIO_FSEL_OUTP);
	  bcm2835_gpio_write(COM, HIGH);
      
	   bcm2835_gpio_fsel(LED1, BCM2835_GPIO_FSEL_OUTP);
      bcm2835_gpio_fsel(BUZZER, BCM2835_GPIO_FSEL_OUTP);
	  bcm2835_gpio_write(BUZZER, LOW);
	  
	  //DIP. button setup as input
	 bcm2835_gpio_fsel(DIP1, BCM2835_GPIO_FSEL_INPT); 
	 bcm2835_gpio_fsel(DIP2, BCM2835_GPIO_FSEL_INPT); 
	 bcm2835_gpio_fsel(BUTTON1, BCM2835_GPIO_FSEL_INPT); 
	 bcm2835_gpio_fsel(BUTTON2, BCM2835_GPIO_FSEL_INPT); 
   
	for (i=0;i<n;i++) {
      bcm2835_gpio_fsel(led_array[i], BCM2835_GPIO_FSEL_OUTP);
	  bcm2835_gpio_write(led_array[i], LOW);
    }
    i=0;
    // Blink
    while (1)
    {
	
     value1= bcm2835_gpio_lev(DIP1);
	 value2= bcm2835_gpio_lev(DIP2);
	 value3= bcm2835_gpio_lev(BUTTON1);
	 value4= bcm2835_gpio_lev(BUTTON2);
	 printf("DIP1=%d,DIP2=%d,BUTTON1=%d,BUTTON2=%d\n", value1,value2,value3,value4);		
		
		
	// led blinking 
	bcm2835_gpio_write(led_array[i], HIGH);
	bcm2835_delay(100);
	bcm2835_gpio_write(led_array[i], LOW);

    i=(i+1)%n;
	
		//check led1
	if (value1==0 && value2==0)
	  	bcm2835_gpio_write(LED1, HIGH);
	 else 
		 bcm2835_gpio_write(LED1, LOW);
	
	//check buzzer
	if (value3==0 && value4==0)
	  	bcm2835_gpio_write(BUZZER, HIGH);
	 else 
		 bcm2835_gpio_write(BUZZER, LOW);

	bcm2835_delay(100);
    }
    bcm2835_close();
    return 0;
}