Timer 2 For PIC 18

Program:

/***************************************/

//Author : Palak Patel

//Contact No:9173211683

//Title:Timer 2 For PIC18F4520

//Platform: PIC18f4520

//Date:5/8/2014

/*Calculation

(64us/0.25us)= 256

convert this 256 in to hex

hex=FF*/

//Fosc=16Mhz
//Timer Frequency=16Mhz/4=4Mhz
//Timer Period=1/4Mhz=0.00000025=0.25us=0.00025ms
//Max time=256*0.25us=0.000064=64us 
/***************************************/

#include<p18f4520.h>
#pragma config OSC = HS
#pragma config FCMEN = OFF
#pragma config IESO = OFF
#pragma config PWRT = OFF
#pragma config BOREN = OFF
#pragma config WDT = OFF
#pragma config MCLRE = ON
#pragma config PBADEN = OFF
#pragma config STVREN = OFF
#pragma config LVP = OFF
#define led PORTC
void delay();
void main()
{
TRISC=0x00;
  
T2CONbits.T2OUTPS3=0;          //Postscaler=1:1
T2CONbits.T2OUTPS2=0;
T2CONbits.T2OUTPS1=0;
T2CONbits.T2OUTPS0=0;
T2CONbits.T2CKPS1=0;
T2CONbits.T2CKPS0=0;            //Prescaler=1:1

while(1)
{
led=0x00;
delay();
led=0xFF;
delay();
}
}

void delay()
{
TMR2=0x00;  
PR2=0xFF;                                  //PR2=256       
T2CONbits.TMR2ON=1;            //Timer2=on
while(PIR1bits.TMR2IF==0);
PIR1bits.TMR2IF=0;                  //Timer 2 Overflow flag
T2CONbits.TMR2ON=0;           //Timer2=off
}



Proteus Simulation:

^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^&^