watchdog timer problem

Dheeraj Saxena

I'm using watchdog to create watchdog interrupt after 1 sec. delay but watchdog interrupt is not firing .

Im doing following steps:

WATCHDOG1_LOCK_R = 0x1ACCE551; //unlock watchdog

WATCHDOG1_LOAD_R = 4000000; //load value for 250ms delay
while(WATCHDOG1_CTL_R & 0x80000000); //wait for WRC bit to set
WATCHDOG1_CTL_R = 0x01;

on debug i found that while checking WRC bit it is getting hang in while loop.

why it is happening.? please help.

Thanks,

Dheeraj

0 Amit Ashara over 9 years ago

Hello Dheeraj,

Before writing the UNLOCK code did you check if the watch dog is Locked and subsequently is it unlocked?

0 Dheeraj Saxena over 9 years ago in reply to Amit Ashara

Thanks Amit.

I found the problem in while loop.By mistake I was checking wrongly.It should be :

while(!(WATCHDOG1_CTL_R & 0x80000000)); //wait for WRC bit to set

Although it working without checking for unlock but I also put the code you suggested first check for lock then only unlock if locked for safe side.

Regards,

Dheeraj

0 Amit Ashara over 9 years ago in reply to Dheeraj Saxena

Hello Dheeraj

That is where the TivaWare API's come handy. Tried and Tested v/s DRM (as you can see it was easy for me to miss as well)

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