I have a momentary contact switch tied to +5V and connected to RB6 of a 18F14K22.
I can see the input changing state via the debugger but the interrupt does not seem to be working when the button is pressed. I know it is probably something simple but I am just not seeing it.
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I can see the input changing state via the debugger but the interrupt does not seem to be working when the button is pressed. I know it is probably something simple but I am just not seeing it.
Rich (BB code):
void InterruptServiceHigh(void);
//----------------------------------------------------------------------------
// High priority interrupt vector
#pragma code InterruptVectorHigh = 0x08
void InterruptVectorHigh (void)
{
_asm
goto InterruptServiceHigh //jump to interrupt routine
_endasm
}
#pragma code // declare executable instructions
void VoltSel_Init()
{
ANSELH=0;
TRISBbits.TRISB4 = 0; //Setup for output
TRISBbits.TRISB5 = 0; //Setup for output
TRISBbits.TRISB6 = 1; //Setup for input (button)
INTCON2bits.RABPU = 0; // enable PORTB internal pullups
WPUBbits.WPUB6 = 1; // enable pull up on RB6
IOCBbits.IOCB6 = 1;
// Set up switch interrupt on INT0
INTCON2bits.INTEDG0 = 0; // interrupt on falling edge of INT0 (switch pressed)
INTCONbits.INT0IF = 0; // ensure flag is cleared
INTCONbits.INT0IE = 1; // enable INT0 interrupt
INTCONbits.GIEL = 1; // Low priority interrupts allowed
INTCONbits.GIEH = 1; // Interrupting enabled.
// NOTE: INT0 is ALWAYS a high priority interrupt
// Set up global interrupts
RCONbits.IPEN = 1; // Enable priority levels on interrupts
