Datasheet

Chapter 5.

Interrupts

// Set up timer

// 7.3728 MHz * 16xPLL /Fosc/4 / 256 prescaler / 57600 counter

// timer should fire twice per second. Since the LED

// will toggle once per interrupt, the LED should come on

// once per second for a half second.

TMR2 = 0; // Clear timer 2

PR2 = 57600; // Timer 2 counter to 576000

T2CON = 0x8030; // Fosc/4, 1:256 prescale, start TMR2

IEC0bits.T2IE = 1; // Enable timer interrupt

// Timer 2 interrupt routine - toggle the red (bottom) LED

// each time the interrupt occurs.

void __attribute__((__interrupt__, auto_psv)) _T2Interrupt( void )

{

IFS0bits.T2IF = 0; // Clear timer interrupt flag

// This is always the first order of

// business in an interrupt routine

LATD ^= 0x0002; // Toggle red LED

}