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[ts-7000] Re: TS-7800 External Watchdog Timer

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Subject: [ts-7000] Re: TS-7800 External Watchdog Timer
From: "dawydiuk" <>
Date: Fri, 01 May 2009 21:47:05 -0000
Hello,

> Eddie, - in this message topic you mentioned that the similar problem existed 
> on TS-7800 (??? or all TS- Arm boards?) and it was fixed by cut and jumper on 
> JTAG header. Can you pls explain how to fix this bug?  Would is apply to 
> TS-7260? Do I need to literally cut some jumper on TS-7260?  

The TS-7260 WDT is implemented in the CPLD, you have to feed/pet/kick(I've 
heard all of these terms ;) before the WDT times out other wise the board will 
be rebooted. There was a bug over a year ago on the TS-7800 that required a cut 
and jumper. Rev D board have this issue resolved in the PCB.

> --- In  "dawydiuk" <eddie@> wrote:
> >
> > Hello,
> > 
> > > Does that mean that the hang on reset problem that both of the
> > > TS-7800s we've tested has been well and truly fixed?
> > 
> > I'm not aware of any bugs regarding the WDT ever existing. Although if
> > you are seeing a problem we are interested in trying to reproduce the
> > problem. Did you compile ts7800ctl yourself? If so have you made any
> > changes to the code? If not can you send the md5sum of the ts7800ctl
> > binary? What revision of the TS-7800 are you using? If you are using a
> > rev C board, on the back of the board on the JTAG header do you see a
> > cut and jumper?
> > 
> > Any other information you can provide that would document how to
> > reproduce this problem would be very helpful. 
> >  
> > > I ask because I had strange behaviors after using ts7800ctl -f to try
> > > out the watchdog.  Sometimes it just hung, other times I could do some
> > > commands (like ls (but only in the current directory) and date) but
> > > not many.  I believe Technologic told us there was a problem with the
> > > reset pin usage on the TS-7800 (or something similar to that) and the
> > > watchdog needed that to work correctly to do its job.
> > 
> > There was a problem that was discovered that was fixed by a cut and
> > jumper on the JTAG header. If this fix is not applied the failure
> > condition would be the board would not properly reboot or boot
> > consistently.
> > 
> > //Eddie
> >
>




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