Do you have any suggestions how I might implement what I need to do ?

I need the INT2 to wake up and increment a counter and then go back to 
sleep (this seems straight forward),
but I need to know when 1 minute has expired to send the accumulated count.

As you mention, when the micro is put back to sleep, the watchdog will 
be reset and I loose my 1 minute interval.

Thanks

Regards

David

piclist2@xargs.com wrote:
> On Wed, 25 Oct 2006, David wrote:
>
>   
>> In addition to requesting help regarding the entering and exit of sleep
>> mode, will the watchdog time fully timeout (ie. not be reset each time
>> the micro wakes for INT2) ?
>>     
>
> The sleep instruction clears the WDT.  Waking up will not.
>
>   
>> I have set up the code shown below. The aim was to toggle a pin each
>> time the micro woke up so I can time the watchdog timeout.
>> What actually happens is the micro sleeps for 4-5 seconds then wakes up
>> and toggles the pin for several seconds at around 64ms
>> then sleeps for 4-5 seconds again. The watchdog timer postscaler is set
>> 1:1 at present. The micro is using internal 4MHz oscillator.
>>     
>
> If your code wakes up from an interrupt, TO will be set, and the WDT
> will still be running.  You won't get into your "if (!TO)" code, and
> the PIC will reset when the WDT times out.  At that point, TO will be
> clear, and you'll get back into your "if (!TO)" code until you have
> another interrupt.
>
>   
>> void init()
>> {
>>  DP1203_init(1,10);
>>  INTERRUPT_init();
>>  PulseCount = 0;
>>  ADCON1 = 0xff;
>>  OSCCON = 0x60;  // 4MHz
>>  IDLEN = false;
>>  SCS0 = false;
>>  SCS1 = false;
>>  SWDTEN = true;
>>  SLEEP();
>> }
>>
>> void main(void)
>> {
>> init();
>> for(;;)
>> {
>>    if(!TO)
>>    {
>>       LATB3 = !LATB3;
>>       //SetRFMode(RF_SW_TRANSMITTER);
>>       //RFPORT.Buf[0] = hi_byte(PulseCount);
>>       //RFPORT.Buf[0] = lo_byte(PulseCount);
>>       //SendRFPacket(0x02,RFPORT.Buf);
>>       //SetRFMode(RF_SW_TRANSMITTER);
>>       IDLEN = false;
>>       SCS0 = false;
>>       SCS1 = false;
>>       SWDTEN = true;
>>       SLEEP();
>>    }
>> }
>> }
>> -- 
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>>
>>     
>
> --
> John W. Temples, III
>   
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