PIC16F84A LED blink example with CCS C compiler

Blink an LED using PIC16F84A and CCS PIC C compiler

This topic shows a simple example for making an LED blinks using Microchip PIC16F84A 8-bit microcontroller and CCS PIC C compiler. It is easy to make an LED blinking, a few program lines are required and the microcontroller PIC16F84A is a simple chip also.

LED: Light Emitting Diode

Hardware Required:

PIC16F84A microcontroller —> datasheet
LED
8 MHz crystal oscillator
2 x 22 pF ceramic capacitor
10k Ohm resistor
330 ohm resistor
Breadboard
5V source
PIC Microcontroller programmer (PICkit 3, PICkit 4…)

PIC16F84A LED blink example circuit:
Circuit schematic diagram for the LED flasher is shown below.

In this example the PIC16F84A microcontroller runs with 8 MHz crystal oscillator, the LED is connected to pin RA0 through a current limiting resistor of 330 Ohm.

MCLR pin (#4) of the PIC16F84A microcontroller is connected to circuit VCC (+5V) through 10k Ohm resistor.

PIC16F84A LED blink example C code:
Code is written with CCS compiler, it was tested with version 5.051.
The C code is described through comments.

// PIC16F84A LED blink example
// http://simple-circuit.com/

#include <16F84A.h>
#use delay(crystal=8000000)

void main(){
  while(TRUE){                  // Endless loop
    output_low(PIN_A0);         // LED OFF
    delay_ms(500);              // Delay 500 ms
    output_high(PIN_A0);        // LED ON
    delay_ms(500);              // Delay 500 ms
  }
}

// PIC16F84A LED blink example

// http://simple-circuit.com/

#include <16F84A.h>

#use delay(crystal=8000000)

void main(){

while(TRUE){ // Endless loop

output_low(PIN_A0); // LED OFF

delay_ms(500); // Delay 500 ms

output_high(PIN_A0); // LED ON

delay_ms(500); // Delay 500 ms

}

PIC16F84A LED blink example simulation video:
The following video shows the simulation of this project using Proteus simulation software.

Blink an LED using PIC16F84A and CCS PIC C compiler

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