WDT doesn't work

DireSpume · Joined: 07 Jan 2013 Posts: 31

Hello, I just wanted to post a problem that took me a while to figure out so that hopefully it will save the next person some time. I was trying to get the watchdog timer to work on a PIC18F67K22. I set the configuration bits as follows:
#fuses WDT,WDT1024
However, the PIC would never reset. Looking at the configuration bits, the WDT enable bit was cleared despite my clear intention to set it with the #fuse statement. Well, it turns out that the compiler ignores the WDT fuse if you also have this in your code:
#device ICD=TRUE
Remove that and the WDT works fine. I wasn't able to find a reference to this quirk anywhere. The weird thing is that the debugger seems to work fine even with that statement removed, so I don't even know what that does. Regardless, I wish the compiler would issue a warning when it ignores one thing because of another. It would have saved me a lot of time. (I'm such a whiner!).

PCM programmer · Joined: 06 Sep 2003 Posts: 21708