Hi,
 
I'm wanting to setup the watchdog, in watchdog mode.
 
My clock source is 3.68MHz and i'm using ACLK as the watchdog clock source.
 
As a simple exercise, I do:
 
WDTCTL = WDTPW + WDTSSEL + WDTCNTCL;
 
while(1) {
    WDTCTL |= 8; // clear watchdog
}
 
but even in the while loop, the watchdog keeps triggering...
 
why is the watchdog NOT being cleared in the loop????
 
 

Darren Logan

Development Engineer

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You are forgeting to use the WDT password when writting to the WDTCTL
register. Try:

WDTCNT |= WDTPW + WDTCNTCL;

Regards,

Fio
  ----- Original Message ----- 
  From: Darren Logan 
  To: msp430@msp4... 
  Sent: Monday, February 13, 2006 7:53 AM
  Subject: [msp430] Using the watchdog (IAR)


  Hi,

  I'm wanting to setup the watchdog, in watchdog mode.

  My clock source is 3.68MHz and i'm using ACLK as the watchdog clock
source.

  As a simple exercise, I do:

  WDTCTL = WDTPW + WDTSSEL + WDTCNTCL;

  while(1) {
      WDTCTL |= 8; // clear watchdog
  }

  but even in the while loop, the watchdog keeps triggering...

  why is the watchdog NOT being cleared in the loop????



  Darren Logan

  Development Engineer

  <?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" />

  Michell Instruments Ltd   main tel:  +44(0)1223 434 800

  Nuffield Close                 direct:     +44(0)1223 434 854

  Cambridge                     fax:         +44(0)1223 434 895

  CB4 1SS                        



  <http://www.michell-instruments.com/>
http://www.michell-instruments.com/

  <mailto:darrenl@darr...> mailto:darrenl@darr...



  * BS EN ISO9001:2000 registered: Q6284 * Member BCAS

  * UKAS accredited: 0179 *  Investor in People



  ----------------------------The dew point specialists-----------------------



  This communication contains information which is confidential

  and may also be privileged. It is for the exclusive use of the intended 

  recipient(s). If you are not the intended recipient(s), please note 

  that any distribution, copying or use of this communication or the

  information in it is strictly prohibited. If you have received this

  communication in error, please notify the sender immediately

  and then destroy any copies of it.





  





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because you have to include the password everytime you write the cntl 
register.

Al

Darren Logan wrote:

>Hi,
> 
>I'm wanting to setup the watchdog, in watchdog mode.
> 
>My clock source is 3.68MHz and i'm using ACLK as the watchdog clock
source.
> 
>As a simple exercise, I do:
> 
>WDTCTL = WDTPW + WDTSSEL + WDTCNTCL;
> 
>while(1) {
>    WDTCTL |= 8; // clear watchdog
>}
> 
>but even in the while loop, the watchdog keeps triggering...
> 
>why is the watchdog NOT being cleared in the loop????
> 
> 
>
>Darren Logan
>
>Development Engineer
>
> <?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" />
>
>Michell Instruments Ltd   main tel:  +44(0)1223 434 800
>
>Nuffield Close                 direct:     +44(0)1223 434 854
>
>Cambridge                     fax:         +44(0)1223 434 895
>
>CB4 1SS                        
>
> 
>
> <http://www.michell-instruments.com/>
http://www.michell-instruments.com/
>
> <mailto:darrenl@darr...> mailto:darrenl@darr...
>
> 
>
>* BS EN ISO9001:2000 registered: Q6284 * Member BCAS
>
>* UKAS accredited: 0179 *  Investor in People
>
> 
>
>----------------------------The dew point specialists-----------------------
>
> 
>
>This communication contains information which is confidential
>
>and may also be privileged. It is for the exclusive use of the intended 
>
>recipient(s). If you are not the intended recipient(s), please note 
>
>that any distribution, copying or use of this communication or the
>
>information in it is strictly prohibited. If you have received this
>
>communication in error, please notify the sender immediately
>
>and then destroy any copies of it.
>
> 
>
>
>
>
>
>
>
>
>
>.
>
> 
>Yahoo! Groups Links
>
>
>
> 
>
>
>
>
>  
>