Jallist Archive Apr 2005

Re: Pic resetting

From: "japus10" <japus13(at)telefonica.net>
Date: 01 Apr 2005 09:03:32 -0000


Hi all,


> > jumping out to the main program will break it. During ISR period
> > you must identify source of interrupt and clear appropriate flag. 

> If the flag is not cleared and you execute a retfie the ISR will 
> reccur inifinitely ...

   This is not correct at all. Not all interrupt flags must be cleared
by software i.e. usart module: "Flag bit TXIF is set when enable bit
TXEN is set. TXIF is cleared by loading TXREG." (you don't need to
clear "by hand" the TXIF).



Regards,
Javi.





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