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Old 10-07-2005, 01:53 AM   #1
Eileen
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Registered: Oct 2004
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Unhappy Watch-Dog-Timer cause reboot


Could anyone gives me any information related to watch-dog-timer that causes my product to reboot???

Any information will be helpfuly!!
Zillioms and thousands of thank you!!
 
Old 10-07-2005, 04:30 AM   #2
Wim Sturkenboom
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Registered: Jan 2005
Location: Roodepoort, South Africa
Distribution: Slackware 10.1/10.2/12, Ubuntu 12.04, Crunchbang Statler
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What product? And what do you want to know?
Specific hardware? Which CPU/microcontroller?

In general:
A watchdog-timer is a counter that counts to a certain value (sometimes a programmable value). When that value is reached, a reset signal is generated.
To prevent a reset, you have to 'kick' the watchdog-timer at a regular base. And here it depends on what kind of hardware you're talking about.
Microcontroller? Probably write to a register.
External watchdog? Probably toggle (or pulse) a pin on the wdt.

Last edited by Wim Sturkenboom; 10-07-2005 at 04:39 AM.
 
Old 10-10-2005, 02:22 AM   #3
Eileen
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Hello All,

Please dun ignore my "reboot" problem!
The error message is WDT_OVERFLOW.
I am using sh7709s, microprocessor.
But I am not the one designing the product.
Is there any ways to check on the wdtd portion??
What are the files related to wdtd??

Greatly Appreciate anyone who helps!!
 
Old 10-10-2005, 06:09 AM   #4
Wim Sturkenboom
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Registered: Jan 2005
Location: Roodepoort, South Africa
Distribution: Slackware 10.1/10.2/12, Ubuntu 12.04, Crunchbang Statler
Posts: 3,786

Rep: Reputation: 282Reputation: 282Reputation: 282
Sorry, not familiar with SH7709 and I don't seem to be able to easily find datasheets, application notes and programmer information.

Quote:
Originally posted by Eileen
But I am not the one designing the product.
So what are you doing? Programming it? Or using it?

Quote:
Originally posted by Eileen
The error message is WDT_OVERFLOW.
When do you get that message? Compile time, while running in debugger, runtime ?
Sounds to me like a warning from a (hardware) debugger.

Quote:
Originally posted by Eileen
Is there any ways to check on the wdtd portion??
Debugger.

Quote:
Originally posted by Eileen
What are the files related to wdtd??
How do you mean? Documentation files? Source files? Ask the programmer who's writing the code.
 
  


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