EK-TM4C1294XL: Watchdog Timer

Arun Vinayak

Hi,

While using watchdog timer in TM4C1294XL launchpad, interrupt is getting hit again and again after enabling the interrupt. Please provide a solution to use watchdog timer.

over 4 years ago

0 Ralph Jacobi over 4 years ago

TI__Guru*** 135355 points

Hello Arun,

Please see our TivaWare provided example for Watchdog located at: [Install Path]\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c1294xl\watchdog

Best Regards,
Ralph

0 Arun Vinayak over 4 years ago in reply to Ralph Jacobi

Prodigy 20 points

We have repeated the same steps like in example but watchdog interrupt handler is hitting always when we enable the watchdog .

ROM_IntEnable(INT_WATCHDOG);

Kindly provide us with a solution

0 Ralph Jacobi over 4 years ago in reply to Arun Vinayak

TI__Guru*** 135355 points

Hello Arun,

What is the code in your Watchdog ISR?

I can say for certain the TivaWare Watchdog example works fine, I can't provide a better solution from TI than that, so this will need to be about understanding what you did different from it.

Also what is the WATCHDOG_TIMER_LOAD value?

Best Regards,

Ralph

0 Arun Vinayak over 4 years ago in reply to Ralph Jacobi

Prodigy 20 points

Inside watchdog isr watchdog clear is done. ROM_WatchdogIntClear(WATCHDOG0_BASE);

#define WATCHDOG_TIMEOUT_PERIOD 1.2 // 1.2s timeout
#define WATCHDOG_TIMER_LOAD (WATCHDOG_TIMEOUT_PERIOD * SYSTEM_CLOCK_FREQUENCY)

0 Ralph Jacobi over 4 years ago in reply to Arun Vinayak

TI__Guru*** 135355 points

Hello Arun,

I really cannot replicate your situation. I am attaching a project where I am using your variables to load the Watchdog. The LED blinks consistently at a slow rate, there is no indication of ISR re-entry at all.

watchdog.zip

Best Regards,
Ralph

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EK-TM4C1294XL: Watchdog Timer