How to setup watchdog ISR with SYS/BIOS

Shef,

What do you mean by "linked to an ISR"? And when you enable the WDT, what exactly are you doing in your code?

Can you share the code in main() that works? And the corresponding code that doesn't work?

Which versions of TI-RTOS, SYS/BIOS, and XDC tools are you using?

Alan

Hi Alan,
Thanks for your quick reply. I just followed the example code in controlSuite to setup WDT, i.e. assign an interrupt function to the WAKE_INT

__interrupt void wakeint_isr(void)
{
WakeCount++;

// Acknowledge this interrupt to get more from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

and then link it to WAKE_INT, and enable WDT in main:

PieVectTable.WAKE_INT = &wakeint_isr; // assign ISR

WdRegs.WDCR.all = 0x0028;

for(;;)
{
LoopCount++;

// Uncomment ServiceDog to just loop here
// Comment ServiceDog to take the WAKEINT instead
// ServiceDog();
}

This works fine and the code jumps to wakeint_isr(). But if I replace the for loop with BIOS_start(), nothing will happens. I checked app.cfg which has a line:

Boot.disableWatchdog = false;

So I assume that WDT is enabled by default in BIOS. What else do I need to do to get WDT working with BIOS? Once it's working I plan to ServiceDog in a task. But I need to see WDT time-out working first. WOndering if I need to use Hwi ans Swi to set it instead of in the code. If so, any example procedures to use? Thanks!

I couldn't find anything in the BIOS_start() thread that would disable the WTD.
Are you sure you are not refreshing the WTD periodically in one of your tasks?
Please share the content of your .cfg file if possible.

Alan

Alan, you are exactly right!!!  I did a global search and found a hidden serviceDog in one of tasks. I should have searched the code before I posted this question. This shows my lack of confidence or understanding on sys/bios. :-(

By the way, there used to be a checkbox in .cfg to disable WDT but it's not there anymore. Do you know where it is now and why it is moved? Since there are UI to set timers and clock in sys/bios cfg, I'd expect to have a counterpart for WDT in cfg.  But it's nowhere to be found. Any thought on this?

Which versions of SYS/BIOS and XDC Tools are you using?
What does the Boot module's config screen look like now?

Alan

I'm using latest sys/bios 6.41.2.41, and XDC 3.30.4.52_vore in CCS 6.0.

The module cfg screen looks like below: