Hi,
I'm writing my first ever MCU program using CodeWarrior and MC68HC908QY4 processor. When I go to set the KBSCR_MODEK = 1 so that my keyboard interrupt is low-level and falling edge sensitive, it falsly triggers a keyboard interrupt. I've tried everything they said in the datasheets but still no luck. Anyone know what to do?
Below is my code:
#include /* for EnableInterrupts macro */ #include /* include peripheral declarations */
#define EVER (;;)
void main(void) { EnableInterrupts; /* enable interrupts. Same as CLI command */ /* include your code here */
//setting CONFIG1 and CONFIG2 CONFIG1 = 0x2B; //00101011 CONFIG2 = 0x01; //00000001
//setting ADSCR ADSCR = 0x23; //00100011 Continous ADC on AD3
//enabling keyboard inputs KBSCR_IMASKK = 1; KBIER = 0x13; //00010011 KBSCR_MODEK = 1; KBSCR_ACKK = 1; KBSCR_IMASKK = 0;
}
interrupt 15 void KBI_ISR(void){
KBSCR_ACKK = 1; //acknowledging interrupt asm STOP; }
the way i know it is triggering the interrupt is when i run the debugger in codewarrior, the program stops at 247 CPU cycles and when i then halt the debugger, it goes to "asm STOP;" line. now, if i remove the "KBSCR_MODEK = 1;" line, the debugger runs to the end of the main function and stops like it is supposed to.
any help would be appreciated.
thanks, Aria