Interrupt TMR1

Timer interrupt is used to interrupt the code for a given time. I followed the example at http://microchipdeveloper.com/mcu1101:project-10 in PIC18F24K20. It works well.

Proteus: just connect a LED to RA2. We will blink this LED using TMR1 interrupt with a period of 500ms

MCC: select RA2 for output, 1MHz internal OSC and add TMR1 peripheral. clock FOSC/4, scaler 1:2, enable interrupt and synch and write 500ms period.

XC8: enable global and peripheral interrupts. On the ISR routine toggle RA2, this will happen at every 500ms interrupt. that's all.

include "mcc_generated_files/mcc.h"

void myTimerISR(void);

/*

                         Main application

 */

void main(void)

{

    // Initialize the device

    SYSTEM_Initialize();

    

    TMR1_SetInterruptHandler (myTimerISR);     //Define interrupt Handler

    // Enable the Global Interrupts

    INTERRUPT_GlobalInterruptEnable();

    // Enable the Peripheral Interrupts

    INTERRUPT_PeripheralInterruptEnable();

    while (1)

    {

        // Add your application code

    }

}

void myTimerISR(void){

    IO_RA2_Toggle();

}

download the example