ATmega8a direct port register-2 led blink

Here’s an example code for blinking an LED using the direct port registers of the ATmega8A microcontroller:

#include <avr/io.h>
#include <util/delay.h>

#define LED_PIN 5 // define the pin number for the LED

int main(void)
{
  DDRB |= (1 << LED_PIN); // configure the LED pin as an output

  while (1)
  {
    PORTB |= (1 << LED_PIN); // turn on the LED
    _delay_ms(500); // wait for 500 milliseconds
    PORTB &= ~(1 << LED_PIN); // turn off the LED
    _delay_ms(500); // wait for 500 milliseconds
  }
}

In this code, we first define the LED pin as LED_PIN and set it to 5, assuming that the LED is connected to pin 5 of PORTB.

Next, we configure the LED pin as an output by setting bit 5 of the DDRB register to 1 using the direct port register access method we discussed earlier.

Then, we enter an infinite loop that toggles the state of the LED every 500 milliseconds using the PORTB register. First, we turn on the LED by setting bit 5 of the PORTB register to 1, and then we wait for 500 milliseconds using the _delay_ms() function from the util/delay.h library. After that, we turn off the LED by clearing bit 5 of the PORTB register to 0, and wait for another 500 milliseconds before repeating the process.

Note that the _delay_ms() function takes the delay time in milliseconds as an argument and is used to create a delay between the LED on and off states. Also, don’t forget to include the avr/io.h and util/delay.h header files in your program for the I/O and delay functions to work.

This Post Has 6 Comments

  1. Push it to the limit cool Wolf! You are the best and you can do everything! It'll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx 8687753

    Push it to the limit cool Wolf! You are the best and you can do everything! It’ll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx

  2. Push it to the limit cool Wolf! You are the best and you can do everything! It'll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx 0039391

    Push it to the limit cool Wolf! You are the best and you can do everything! It’ll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx

  3. Push it to the limit cool Wolf! You are the best and you can do everything! It'll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx 4556665

    Push it to the limit cool Wolf! You are the best and you can do everything! It’ll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx

  4. Thank you For your hard work over the years! For this, we give you the opportunity. https://google.com#1234567890 For more information, see the instructions. skfhjvkjsdjsrbhvbsrfhkis 5095765

    Thank you For your hard work over the years! For this, we give you the opportunity. https://google.com#1234567890 For more information, see the instructions. skfhjvkjsdjsrbhvbsrfhkis

  5. Push it to the limit cool Wolf! You are the best and you can do everything! It'll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx 9955568

    Push it to the limit cool Wolf! You are the best and you can do everything! It’ll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx

  6. Push it to the limit cool Wolf! You are the best and you can do everything! It'll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx 6385386

    Push it to the limit cool Wolf! You are the best and you can do everything! It’ll all work out very very very soon! https://www.samsung.com smkmkplobydlmcrjmzgvx

Leave a Reply