LED INTERFACING WITH AVR CONTROLLER

LED INTERFACING WITH ATMEGA 16

                                                            LED INTERFACE METHOD 

                                                                              |

                               |------------------------------ | ------------------------------|

                               |                                                               |

       SET BY DIRECT PORT VALUE                         USE BITWISE OPERATION

   

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1. SET BY DIRECT PORT VALUE

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#define FOSC 8000000UL          //DEFINE CLOCK FREQ. 

#include<avr/io.h>                        // INCLUDE YOUR AVR  DEVICE FILES

#include<util/delay.h>                   // INCLUDE DELAYS HEADER FILE  

void main (void)                            // MAIN PROGRAM STARTS HERE 

{

DDRB=0XFF;                             // SET  DIRECTION OF PORTB AS AN O/P 

PORTD=0X00;                           // CLEAR ALL PINB OR SET 0 VOLT TO ALL PIN OF PORTB  

           while (1)                                       // INFINITE LOOP

{

PORTB=0XFF;                         // SET ALL PINB AS 5 VOLT

_delay_ms(100);                        // DELAY FOR DISPLAY ITS ON

PORTB=0X00;                         // SET ALL PINB TO  0 VOLT

_delay_ms(100);                         // DELAY FOR DISPLAY ITS ON

}

}

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BIT WISE OPERATION: set 0v or 5 volt to microcontroller individually .
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#define FOSC 8000000UL
#include<avr/io.h>
#include<util/delay.h>
#include <stdlib.h>

#define LED_INTRFACING_PORT PORTB
#define LED_INTRFACING_PORT_dir   DDRB
#define LED0 0
#define LED1 1


void main (void)
{
LED_INTRFACING_PORT_dir|=(1<<LED0)|(1<<LED1);



while (1)
{
LED_INTRFACING_PORT |=(1<<LED0);               //set pin b0 to  5volt

LED_INTRFACING_PORT &=~(1<<LED1);           //set pinb1 0volt

_delay_ms(100);

LED_INTRFACING_PORT |=(1<<LED1);                / /set pinb1 5volt

LED_INTRFACING_PORT &=~(1<<LED0);            //set pinb0 0volt

_delay_ms(100);

     }

}