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Problem with watchdog on a 18F2520

 
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nilsener



Joined: 06 Dec 2005
Posts: 59

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Problem with watchdog on a 18F2520
PostPosted: Tue Nov 28, 2006 9:44 am     Reply with quote
My watchdog on a 18F2520 overflows each 2.18 minutes as it is given in the datasheet (section 23.2, page 260) as the max time for the watchdog. Clearly, 2.18 minutes is far to much. How can I adjust the watchdog to shorter times?

I use:

Code:
#fuses HS,WDT,PUT,PROTECT,NOMCLR,CPD,BROWNOUT,NOIESO,NOFCMEN,NODEBUG,INTRC_IO,NOLVP


Thanks for any help!

Best Regards
nilsener
davekelly



Joined: 04 Oct 2006
Posts: 53
Location: Berkshire, England

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PostPosted: Tue Nov 28, 2006 9:55 am     Reply with quote
Use the setup_wdt() function.

Refer to the manual for the time constants.
nilsener



Joined: 06 Dec 2005
Posts: 59

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PostPosted: Tue Nov 28, 2006 10:08 am     Reply with quote
problem solved. The fuse WDT seems to set the watchdog to max time. I now use the fuse WDT256 to get adequate times.
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