wdt in PIC

z3ngew · Joined: 20 Apr 2013 Posts: 50

Hello everyone,
Can watch dog timer which is implemented in the pic hardware be used as a regular timer, and if yes, please provide code snippet if possible?

Thanks in advance,
z3ngew

Gabriel · Joined: 03 Aug 2009 Posts: 1067 Location: Panama

why not just use a regular timer? 0,1,2,3,... depending on pic..
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CCS PCM 5.078 & CCS PCH 5.093

z3ngew · Joined: 20 Apr 2013 Posts: 50

well, i am planning to use the other timers to make an interrupt multitasking system that will enable me to operate more that one RC servo motor at the same time, but not with the same behavior, so i was wondering if wdt can be used like regular timer, it would be helpful for me,

thanks, Smile

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Watchdog timer capabilities vary widely, depending on the PIC. Always
post your PIC.

z3ngew · Joined: 20 Apr 2013 Posts: 50

I'm using PIC18F452

newguy · Joined: 24 Jun 2004 Posts: 1911

The biggest problem with the watchdog is that it isn't a precise timing source.

The second is that a watchdog expiry causes a processor reset. Relying on that is very poor coding practice.

asmboy · Joined: 20 Nov 2007 Posts: 2128 Location: albany ny

temtronic · Posted: Thu May 16, 2013 5:24 pm

Even the 'ancient' 16C84 can handle 8 'rc servos' and a serial interface at 9600 baud.