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exterior interrupts - PIC18f2331

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deperkin

Joined: 04 Feb 2009
Posts: 83
Location: PA

exterior interrupts - PIC18f2331

Posted: Wed Apr 15, 2009 8:47 pm

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hello all!

I am using a PIC18f2331 that has three interrupts (INT0, INT1, INT2).
when using these I have the global interrupts enabled, but I currently have the following:

Code:

#INT_EXT
function 1{
.
.
}
#INT_EXT1
function 2{
.
.
}
#INT_EXT2
function 3{
.
.
}

Is this the correct format for INT0, INT1, and INT2 respectively??

I was unclear why a EXT0 was not used...

I may be just completely confused on this but would appreciate any help.

Thank you all as always,
deperkin

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Wed Apr 15, 2009 11:15 pm

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Quote:

Is this the correct format for INT0, INT1, and INT2 respectively??

Yes.

Quote:

I was unclear why a EXT0 was not used...

For historical reasons. Initially, Microchip only had one external interrupt
which they called "INT" (on the 16F877, for example). CCS copied that
terminology.

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