interrupt

dummyagain · 10-20-2003, 08:34 AM

What's the C code for enabling and disabling interrupt in C?

Hko · 10-20-2003, 10:25 AM

What do you mean by "interrupt"?

1) Hardware interrupt (IRQ)? You can't really, the kernel handles hardware interrupt. Just unload (rmmod) the right module(s).

2) Things like "CTRL-C", "CTRL-\" and "kill <pid>" ? These are called "signals" in Linux/UNIX. See "man sigaction".

dummyagain · 10-20-2003, 11:15 AM

i want to control the speaker to produce sound, should i first disable the interrupts first and then write to the port?

but i don't know the exact procedures, can u tell me , plx?

thanks

kev82 · 10-20-2003, 11:40 AM

you'll need to do some kernel mode programming, there is an article on linux gazette about programming the pc speaker if your interested.

Hko · 10-20-2003, 11:52 AM

This is not easy. You don't just "disable interrupts" in Linux.
To do this, you would need to have a kernel module.
This is not in the standard kernel, but here's a link to one effort:

http://www.geocities.com/stssppnn/pcsp.html

dummyagain · 10-20-2003, 09:09 PM

I am sorry that I am not really understand what the material in the website...

can u suggest some other sites?