I'm trying to set up an interupt to trigger when there is a falling edge on my CCP1 pin (I'm using a PIC18F4550). If I poll for the interupt bit to be set (just run a loop waiting for PIRbits. to go high) everything works. However when I try to use an ISR I get no response.
I am using one of microchip's application notes with USB, and they have a method called "YourHighPriorityISRCode()" which I am using (the comments are from microchip):
Anyway ideas why it's not working? I've tried adding an "else" statement which by my understanding should have been triggered every time an interrupt was received, but I got nothing.
I am using one of microchip's application notes with USB, and they have a method called "YourHighPriorityISRCode()" which I am using (the comments are from microchip):
Code:
//These are your actual interrupt handling routines.
#pragma interrupt YourHighPriorityISRCode
void YourHighPriorityISRCode()
{
if(PIR1bits.CCP1IF == 1){
alpha = 1;
PIR1bits.CCP1IF = 0;
}
//Check which interrupt flag caused the interrupt.
//Service the interrupt
//Clear the interrupt flag
//Etc.
#if defined(USB_INTERRUPT)
USBDeviceTasks();
#endif
} //This return will be a "retfie fast", since this is in a #pragma interrupt sectionAnyway ideas why it's not working? I've tried adding an "else" statement which by my understanding should have been triggered every time an interrupt was received, but I got nothing.