LED Switch Programing-Exp2

LED Switch 2148-Exp2

#include <LPC214x.H>                       /* LPC21xx definitions */

#define IOPIN1          (*((volatile unsigned long *) 0xE0028010))
#define IOSET0          (*((volatile unsigned long *) 0xE0028004))
#define IOCLR0          (*((volatile unsigned long *) 0xE002800C))

#define IODIR0          (*((volatile unsigned long *) 0xE0028008))
#define IODIR1          (*((volatile unsigned long *) 0xE0028018))

#define LED_IO_DIR IODIR0
#define SW_IO_DIR  IODIR1

#define INIT_LEDS()     (LED_IO_DIR |= LED_MASK)
#define INIT_SWITCHES() (SW_IO_DIR &= ~SWITCH_MASK)

#define LED_MASK (LED1 | LED2 | LED3 | LED4 | LED5 | LED6 | LED7 | LED8)
#define SWITCH_MASK (SWITCH1 | SWITCH2 | SWITCH3 | SWITCH4 | SWITCH5 | SWITCH6 | SWITCH7 | SWITCH8)

#define LED_CLR IOCLR0
#define LED_SET IOSET0
#define SW_IO_PIN IOPIN1

#define SWITCH1 (1 << 24)
#define SWITCH2 (1 << 23)
#define SWITCH3 (1 << 22)
#define SWITCH4 (1 << 21)
#define SWITCH5 (1 << 20)
#define SWITCH6 (1 << 19)
#define SWITCH7 (1 << 18)
#define SWITCH8 (1 << 17)

#define LED_NUM1 8
#define LED_NUM2 7
#define LED_NUM3 6
#define LED_NUM4 5
#define LED_NUM5 4
#define LED_NUM6 3
#define LED_NUM7 2
#define LED_NUM8 1

#define LED1 (1 << 13)
#define LED2 (1 << 12)
#define LED3 (1 << 11)
#define LED4 (1 << 10)
#define LED5 (1 << 7)
#define LED6 (1 << 6)
#define LED7 (1 << 5)
#define LED8 (1 << 4)



/**
*****************************************************************************
  Function Name : turn_on_led()

	Description   :

	Input         : Void 

	Output        : None

	Note          :
******************************************************************************
*/

void turn_on_led(unsigned char led_num) {

    switch(led_num)
    {
      case LED_NUM1:
        LED_SET |= LED1;
        break;
      case LED_NUM2:
        LED_SET |=LED2;
        break;
      case LED_NUM3:
        LED_SET |=LED3;
        break;
      case LED_NUM4:
        LED_SET |=LED4;
        break;
      case LED_NUM5:
        LED_SET |=LED5;
        break;
      case LED_NUM6:
        LED_SET |=LED6;
        break;
      case LED_NUM7:
        LED_SET |=LED7;
        break;
      case LED_NUM8:
        LED_SET |=LED8;
        break;
      default:
        break;
    }
}


/**
*****************************************************************************
  Function Name : turn_off_led()

	Description   :

	Input         : Void 

	Output        : None

	Note          :
******************************************************************************
*/

void turn_off_led(unsigned char led_num) 
{
    switch(led_num)
    {
      case LED_NUM1:
          LED_CLR |=LED1;
          break;
      case LED_NUM2:
          LED_CLR |=LED2;
          break;
      case LED_NUM3:
          LED_CLR |=LED3;
          break;
      case LED_NUM4:
          LED_CLR |=LED4;
          break;
      case LED_NUM5:
          LED_CLR |=LED5;
          break;
      case LED_NUM6:
          LED_CLR |=LED6;
          break;
      case LED_NUM7:
          LED_CLR |=LED7;
          break;
      case LED_NUM8:
          LED_CLR |=LED8;
          break;
      default:
          break;
  }
}

void wait(void) {
    int d;
    for(d = 0;d <=200; d++);
}

/**
*****************************************************************************
  Function Name : turn_off_all_leds()

	Description   :

	Input         : Void 

	Output        : None

	Note          :
******************************************************************************
*/
void turn_off_all_leds()
{
  LED_CLR |= LED_MASK;
}


/**
*****************************************************************************
  Function Name : turn_on_all_leds()

	Description   :

	Input         : Void 

	Output        : None

	Note          :
******************************************************************************
*/
void turn_on_all_leds()
{
  LED_SET |= LED_MASK;
}


/***Main program************************/

int main(void)
{
  unsigned int sw_mask;
  unsigned int index;

  INIT_LEDS();
  INIT_SWITCHES();

  while(1) 
{
  sw_mask = SW_IO_PIN & SWITCH_MASK;   //Read switches
  for(index = 0;index < 8;index++)
  {
    if(sw_mask & (1 << (index+17)))
      {
        turn_on_led(index + 1);
      }
    else
      {
        turn_off_led(index + 1);
      }
  }
  wait();
  }
}