RTOS/LAUNCHXL-CC1310: Reliability of WatchDog Timer in CC1310

harsha ganegoda

Part Number: LAUNCHXL-CC1310
Other Parts Discussed in Thread: CC1310

Tool/software: TI-RTOS

Hi,

I use watchdog timer in CC1310 top of the TI-RTOS. I set it generate system reboot interrupt and I checked my code using infinite loop. I put while(); into my code and I defined watchdog timeout. When I run the code my CC1310 LaunchPad rebooting when comes the timeout. But I want to know what happen if TI-RTOS stuck somewhere? Because enabling WDT I used TI-RTOS library functions. Beginning of my code I added this library header #include <ti/drivers/Watchdog.h> . If TI-RTOS hang still watchdog timer is functioning? Can anyone please give me clear understanding about this? Thank you.

Here is my code for initializing WDT,

void wdtSetup()
{
Watchdog_Params params;
/* Call board init functions */
Watchdog_init();
/* Create and enable a Watchdog with resets disabled */
Watchdog_Params_init(&params);
params.callbackFxn = (Watchdog_Callback)watchdogCallback;
params.resetMode = Watchdog_RESET_ON; //generate Reboot interrupt
watchdogHandle = Watchdog_open(Board_WATCHDOG0, &params);
Watchdog_setReload(watchdogHandle, 30000000); //set WDT period
}

over 8 years ago

0 Darius Williams over 8 years ago

TI__Expert 4440 points

Harsha,

The purpose of the Watchdog timer is to detect instances where the application becomes "stuck". The Watchdog driver simply configures the hardware and therefore is not OS dependent. In your case, the watchdog will generate a reset after it times out.

Derrick

0 harsha ganegoda over 8 years ago in reply to Darius Williams

Prodigy 240 points

Hi Derrick,

Thank you for your quick response. So how can I test WDT functionality? That mean how do I create TI-RTOS stuck scenario? Because I want to make sure my WDT has correct functioning. Thanks.

0 Darius Williams over 8 years ago in reply to harsha ganegoda

TI__Expert 4440 points

Harsha,

Which version of TI-RTOS or SimpleLink SDK are you using?

There may be a watchdog example included in your product.

Alternatively, the easiest way is to add a Hardware Interrupt (Hwi). Inside your Hwi, disable Hwi's and enter an infinite while(1) loop.

void myHwi(UArg arg)
{
    uint32_t key = Hwi_disable();
    
    while(1);

}

See the Hwi Documentation.

Derrick

0 harsha ganegoda over 8 years ago in reply to Darius Williams

Prodigy 240 points

Thank you very much Derrick. THis works for me.

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RTOS/LAUNCHXL-CC1310: Reliability of WatchDog Timer in CC1310