Triggering a reset with watchdog timer

Yokablasta · Joined: 13 Dec 2017 Posts: 19

Hello,
I am trying to get a bootloader program to install and run 2 bits of application code consecutively. I'd like to use a watchdog timer to trigger a reset, but I seem to be doing it wrong. I'm using an Atmega128. What I've done is written

Config Watchdog = 1024
Start Watchdog

at the end of the first application, in hopes that it would trigger a reset. So far it's not working. Is there a flag or something I should be checking to get the WDT to trigger a reset? Any help would be appreciated. Best,
-R

(BASCOM-AVR version : 2.0.8.1 )

enniom · Joined: 20 Oct 2009 Posts: 537

.
Try

Yokablasta · Joined: 13 Dec 2017 Posts: 19

Thanks! That's a good thing to know about!

albertsm · Joined: 09 Apr 2004 Posts: 5921 Location: Holland

i also use the WD to get a reset in some apps.

so it should work.
I advise to check out the WATCHD.BAS sample from the samples folder.

enniom · Joined: 20 Oct 2009 Posts: 537

Hi Mark,

I may be making an error, but when Watchdog is triggered from a Bootloader, the uC will restart from the Boot Vector and execute the Bootloader again - and not the Main program?

E

albertsm · Joined: 09 Apr 2004 Posts: 5921 Location: Holland

when the WD times out it generates a reset.
It depends on the fuse settings if the Boot vector or the reset vector will be executed.

njepsen · Joined: 13 Aug 2007 Posts: 469

where is the samples folder ? I have searched in vain !!

Tiny · Joined: 10 Nov 2010 Posts: 101 Location: The Netherlands

in windows 7 they are in C:\Program Files (x86)\MCS Electronics\BASCOM-AVR\SAMPLES

EDC · Joined: 26 Mar 2014 Posts: 971

No need to search Very Happy