[riot-users] enabling WDT on SAM R21

Peter Kietzmann peter.kietzmann at haw-hamburg.de
Tue Apr 21 08:25:27 CEST 2015


Hi Abdul,

I haven't got a concrete answer for you but:

Is the APBA clock for the WDT enabled in the power manager (APBAMASK  
register)?

Is the GCLK generic clock selection enabled (CLKCTRL register)?


Best,
Peter



Am 21.04.2015 um 05:41 schrieb Abdulkhadar Abdulla:
> Hi,
>
> Can anybody help me in enabling the wdt sam r21? I tried the following 
> code segment but didn't enable the WDT. Am I missing anything here?
>
> void start_wdt(void)
> {
> WDT->CONFIG.bit.PER = 0xB;
> WDT->CTRL.bit.WEN = 0;
> while(WDT->STATUS.bit.SYNCBUSY == 1);
> WDT->INTENSET.bit.EW = 0;
> WDT->CTRL.bit.ENABLE = 1;
> while(WDT->STATUS.bit.SYNCBUSY == 1);
> }
>
> and in the main loop, I used WDT->CLEAR.bit.CLEAR = 0xA5; to clear the 
> WDT counter.
>
> Thanks
> Abdul
> ------------------------------------------------------------------------
> Date: Thu, 9 Apr 2015 10:19:27 +0200
> From: hauke.petersen at fu-berlin.de
> To: users at riot-os.org
> Subject: Re: [riot-users] sixlowapp Ping not working in SAM R21
>
> hi,
>
> On 08.04.2015 09:15, Abdulkhadar Abdulla wrote:
>
>     Hi Oleg,
>
>     Thank you.
>
>     Hi Hauke,
>
>     Can you please help me in this?
>
> I fear I can not really help, aside from telling you that I have just 
> taken on the work to fix the radio driver. I hope I will be able to 
> pull request a fixed version next week...
>
> Cheers,
> Hauke
>
>
>     Thanks
>     Abdul
>
>     Date: Wed, 8 Apr 2015 09:02:22 +0200
>     From: oliver.hahm at inria.fr <mailto:oliver.hahm at inria.fr>
>     To: users at riot-os.org <mailto:users at riot-os.org>
>     Subject: Re: [riot-users] sixlowapp Ping not working in SAM R21
>
>     Hi Abdul!
>       
>     > I observed another problem, when using sixlowapp with SAM R21. I have 3 sam
>     > r21 boards. I flashed sixlowapp in all the boards. When I start the boards,
>     > one of the node freezes but other two nodes can exchange data using nc
>     > command. Any of you observed this problem before?
>       
>     Just yesterday I learned that there is probably a bug in the SPI driver that
>     may cause this problem. Maybe Hauke can tell more about this issue.
>       
>     Cheers,
>     Oleg
>     -- 
>     The great thing about SQL transaction jokes is that once you BEGIN, you can
>     ROLLBACK if nobody gets them.
>
>
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-- 
Peter Kietzmann

Hamburg University of Applied Sciences
Dept. Informatik, Internet Technologies Group
Berliner Tor 7, 20099 Hamburg, Germany
Fon: +49-40-42875-8426
Web: http://www.haw-hamburg.de/inet

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