Arkadaşlar hi-tech te kesme uygulaması yapmak istiyorum o kadar araştırmama rağmen hiç bir sonuca ulaşamadım lütfen yardım edin.
HI-TECH sample klasöründen alıntdır.
#include <pic.h>
/*
* Interrupt demo for PIC; wait for button press on RB0/INT,
* turn on a relay on another port bit for a period of time.
* For simplicity here, literal constants are used, usually these
* should be calculated with compile-time arithmetic.
*/
#define RELAY RB4 // use this bit to drive relay
static unsigned int relay_timer; // timer value for relay driver
void
main(void)
{
/* setup stuff */
RELAY = 1; // ensure relay is off before enabling output
TRISB = 0x03; // Port B bits 7 and 6 are output
OPTION = 0b00000111;
TRISB = 0b00000011;
RBPU = 0; // Use internal pullups
T0IE = 1; // Enable interrupt on TMR0 overflow
INTEDG = 1; // falling edge trigger the interrupt
INTE = 1; // enable the external interrupt
GIE = 1; // Global interrupt enable
for(;;){
CLRWDT(); // Idly kick the dog
}
}
static void interrupt
isr(void) // Here be interrupt function - the name is unimportant.
{
if(T0IF) { // timer interrupt
PORTB ^= 4;
if(relay_timer){// is the relay timer running?
relay_timer--; // decrement it
PORTB |= 8;
}else{
RELAY = 1; // turn the relay off
PORTB &= ~8; // toggle a bit to say we're alive
}
T0IF = 0; // clear the interrupt flag
}
if(INTF) { // did we see a button press?
RELAY = 0; // turn the relay on
relay_timer = 16; // start the timer - 16 timeouts ~ 1 second
INTF = 0; // clear the interrupt
}
}