[Avila] watchdog on avila (GW-2348)

[Al Caliskan]

Chris and Tim,

I do not use any special software that strobes the DS1819 watchdog 
device, because in my setup strobing is achieved by configuring GPIO14 
as a 4.7 MHz clock (Redboot takes care of configuring the GPIO14 pin).  
I also understand that if GPIO14 were not configured properly, and the 
watchdog were not strobed, then I would be having the problem you 
mentioned (watchdog triggered resets).  I just wanted to point out to 
the difference between software and hardware strobing methods here.

However, my main concern is that Chris's email states:

> There is also issues with programming the boards through jtag with the
> watchdog resistor loaded, this has been resolved with the DOS version of our
> utility, but no other jtag programmers/debuggers currently work with the
> resistor loaded.


Clearly, Chris stated that JTAG with the R11 resistor loaded works only 
in DOS.  And just to be safe, if Chris's original statement was 
incorrect, I would also like him to confirm that.

Chris:  I will be waiting for a reply from you and a clarification to 
this topic.  My company is having a large number of products comprising 
Avila boards built this week, and we will be installing the R11 
resistor.  Therefore, would like to make sure that we will not be 
encountering any unexpected problems.

- Al


Tim Harvey wrote:
> The 'problem' is that the watchdog will trip and reset your board.  If
> its not occurring to you then your using a version of the software that
> tickles the watchdog while its programming.
>
> Tim
>
> ----- Original Message ----
> From: Al Caliskan <acaliskan at gmail.com>
> To: Chris Lang <chris at ccbw.net>
> Cc: avila at lists.gateworks.com
> Sent: Friday, May 9, 2008 9:56:28 AM
> Subject: Re: [Avila] watchdog on avila (GW-2348)
>
> Chris,
>
> Chris Lang wrote:
>   
>> There is also issues with programming the boards through jtag with the
>> watchdog resistor loaded, this has been resolved with the DOS version of our
>> utility, but no other jtag programmers/debuggers currently work with the
>> resistor loaded.
>>  
>>     
> I am able to reliably JTAG program an Avila board with the R11 resistor 
> installed. I programmed and verified the flash memory contents of the 
> same board 10 times, and every time it worked. I am using a GW16012 Rev 
> D JTAG programmer in Linux.
>
> Could you in more detail describe the problem that will occur when an 
> Avila with R11 installed is JTAG programmed. Does the problem apply to 
> all Avila hardware revisions? How can I replicate the problem in Linux 
> using the GW16012 Rev D programmer?
>
> Thank you,
>
> - Al
>
>
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>   

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