Re: Using external interrupts in 686BASE -- Support Forum for CompuLab's X86CORE & X86BASE Products

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Subject: Re: Using external interrupts in 686BASE

Author:
Jason Farque'

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Date Posted: 08:56:00 04/28/03 Mon
In reply to: Josep Colominas 's message, "Using external interrupts in 686BASE" on 01:55:03 04/03/03 Thu

I sure wish CompuLab could post a code example on setting these external interrupts up. I've spent two days in the horrid documentation on this topic and simply cannot figure it out. The Winbond literature is terrible and the CompuLab manuals don't help a bit in my opinion.

If anyone has done this, please explain it.

Jason

>I want to use GPIO31 as external interrupt IRQ9 in
>686BASE. I think I must to programm next W83977AFT
>registers (reading "sio.c" document in CompuLab
>example file and Winbond W83977ATF DataSheet):
>
> siowr(9,0x30,0x01); //enable GP3
> siowr(9,0xF0,0xFF); //define GP3 as input
> siowr(9,0xE1,0x09); //GP31 as interrupt steering
>function
> siowr(9,0x72,0x09); //select IRQ9
>
> setvect(0xF1,myhandler);//point 0xF1 int to myhandler
> data=inportb(0x21);
> outportb(0x21,data&0xFB); //enable IRQ9 in primary
>PIC
> data=inportb(0xA1);
> outportb(0xA1,data&0xFD); //enable IRQ9 in secondary
>PIC
> ...
>
>
> where siowr() procedure is defined as in "sio.c"
>
>
>after executing this code, GP3 acts as input ports,
>but no IRQ9 seems to be generate.
>
>Anybody can help me?
>
>Thanks a lot!!!

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