On Wednesday, February 07, 2001 2:07 PM, D Lloyd [SMTP:dan.lloydspamBeGoneRemoveMEGB.ABB.COM]
wrote:
> This may be daft but does the compiler allow you to call functions from
interrupts?

Yes, it's allowed, the following is a snippet of code which I know works.

Nigel


void interrupt ServiceIRQ(void)
{

 byte temp;

 BUSY = 1; // set busyflag to PC

 if(T0IF) // 50mS wake-up interrupt
   {
     TMR0 = RELOAD;
     IRQFlag = 1;

     if(TPHWatchdogCounter) TPHWatchdogCounter--;
     if(MotorWatchdogCounter) MotorWatchdogCounter--;
     T0IF = 0; // clear interrupt flag bit
   }


 if(PSPIF) // PSP input & output interrupt
   {

     if(PSPIRQCounter < 255) PSPIRQCounter++;

     PSPIF = 0; // clear interrupt flag bit

     if(IBF) ServicePSP(); // if interrupt is a receive from PC
       else (OBF) = 0; // clear output buffer flag
     if(IBOV) // test input buffer overflow flag
       {
         temp = PORTD;    // read extra character
         IBOV = 0; // clear overflow flag
       }
   }


 if(TMR1IF) // Timer 1 overflow interrupt
   {
     TMR1IF = 0; // clear interrupt flag
     ServiceTimer1();
   }

 // IRQs with no reset in main loop?
 if(PSPIRQCounter < 10) BUSY = 0; // clear busyflag to PC

}

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