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Masking Multiple Interrupts

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Masking Multiple Interrupts
Posted: Sat Jul 28, 2007 5:28 am

Hello, PIC18F6722 Let's say I have 2 interrupts occuring at the same time on int_ext2 and int_ext3. I'd like to service int_ext3 but NOT int_ext2. What would be the best way? if i set: #priority int_ext3,int_ext2 Should I disable and clear int_ext2 inside the int_ext3 service routine? Thanks, Gary

ckielstra

Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

Re: Masking Multiple Interrupts

Posted: Sat Jul 28, 2007 6:40 am

Reply with quote

Anonymous wrote:

Let's say I have 2 interrupts occuring at the same time on int_ext2 and int_ext3. I'd like to service int_ext3 but NOT int_ext2. What would be the best way?

if i set:
#priority int_ext3,int_ext2

Should I disable and clear int_ext2 inside the int_ext3 service routine?

This is one option and should work fine.
I don't know your application, but maybe you have to rethink your algorithm. It takes time to handle an interrupt, so what is supposed to happen when both interrupts are not active at the same time but very close after each other?

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