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Interrupts and variables...

 
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Pota78



Joined: 09 Sep 2005
Posts: 16

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Interrupts and variables...
PostPosted: Sat Oct 29, 2005 1:42 am     Reply with quote
Hi all, I'm using a 16F877A in combination with an AD7731 (A/D converter).
I need to measure the differential voltage from a wheatsone bridge... everything goes right, but after a interrupt arrives, the program turns back from the interrupt routine and the variables I use to do the measure are changed...
Why so? The interrupt would not delete/use the ram I use... or do it?

Thank You very much,
Pota Smile
asmallri



Joined: 12 Aug 2004
Posts: 1634
Location: Perth, Australia

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PostPosted: Sat Oct 29, 2005 3:34 am     Reply with quote
YOur variables should not change. Are you sure that you have no overlaid the variables in the mainline with those used in your interrupt handler? Do you do any asm code in your interrupt handler?

You may need to post some code..
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