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

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Subject: Using external interrupts in 686BASE

Author:
Josep Colominas

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Date Posted: 01:55:03 04/03/03 Thu

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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Replies:

Subject	Author	Date
Re: Using external interrupts in 686BASE	Jason Farque'	08:56:00 04/28/03 Mon