topic Interrupts in S12 / MagniV Microcontrollers

Interrupts

ernestsnaith — Mon, 15 May 2006 00:48:25 GMT

I am having difficulties with the interrupt vector table.

I have blagged some code (C) and cant work out how the interrupts work. One example is

interrupt 38 void CANRECEIVE()

interrupt 56 void PORTP()

In datasheet i cant match the 38, where does it come from?

datasheet quotes vector adress (+ base) and XGATE channel ID.

Please could someone explain the base address and how the numbering works

Many thanks

Re: Interrupts

CrasyCat — Mon, 15 May 2006 18:28:39 GMT

Hello

Basically it works in the following way:

interrupt number 0 is the reset vector (located at 0xFFFE in the vector table).

interrupt number 1 is the vector located at address 0xFFFC in the vector table.

and so on.

I hope this helps.

CrasyCat

Re: Interrupts

CCandido — Wed, 17 May 2006 08:20:09 GMT

Hi,

PORT=P0

void __interrupt 56 EInt1_Interrupt(void) {

code.....................

}

//--------------------------------------------

void EInt1_Enable_Disable(uchar ED){

      HPRIO = 142;
        PIFP = 1;                             /* Clear flag */
if(ED)
        PIEP_PIEP0 = 1;                   /* Enable interrupt */
else
        PIEP_PIEP0 = 0;                    /* Disable interrpt */

}
//--------------------------------------------

Edited by Carlos Candido.