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i need help with interrupts in C


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carlos_10111

Wed Nov 19 2008, 12:27AM

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Hello every one, i've been strugling a bit with the use of interrupt when using C.
I'm using Multisim, which has HI-TECH compiler. If any one can help me on how to declare interrupt, and calling them using C.
I just wanted to use the in a small program. for instance, im flashing LEDs in a certain sequence, but when a certain switch is pressed, i want the sequence to change. i thought of using one of the external interrupts.

Your input will be apreciated.

pdi33

Wed Nov 19 2008, 05:16AM

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Joined: Mon Jun 04 2007, 09:28AM

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declaring interrupts in C for AVRs is fairly simple use the following syntax:

CODE:

#include <avr/interrupt.h>

ISR(INT0_vect)

{

    // user code here

}

here the external interrupt int0 will be processed.u can get more info about the various definitions of the interrupts of AVRs from the documentation on this link;
http://www.nongnu.org/avr-libc/

[ Edited Wed Nov 19 2008, 05:16AM ]

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