TMS320F280038C-Q1: DEVICE_DELAY_US function and WATCHDOG reset mech.

Gokhan G.

Part Number: TMS320F280038C-Q1
Other Parts Discussed in Thread: C2000WARE

Tool/software:

Hi,

In the device.c and device.h, there is DEVICE_DELAY_US functions. I call in my mainloop. I just wonder that I also set my Watchdog

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SysCtl_setWatchdogMode(SYSCTL_WD_MODE_RESET);
SysCtl_setWatchdogPredivider(SYSCTL_WD_PREDIV_2048);
SysCtl_setWatchdogPrescaler(SYSCTL_WD_PRESCALE_8);
SysCtl_serviceWatchdog();
SysCtl_enableWatchdog();
SysCtl_setWatchdogMode(SYSCTL_WD_MODE_RESET);.
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SysCtl_setWatchdogMode(SYSCTL_WD_MODE_RESET);

SysCtl_setWatchdogPredivider(SYSCTL_WD_PREDIV_2048);
SysCtl_setWatchdogPrescaler(SYSCTL_WD_PRESCALE_8);

SysCtl_serviceWatchdog();
SysCtl_enableWatchdog();

SysCtl_setWatchdogMode(SYSCTL_WD_MODE_RESET);.

1) Can DEVICE_DELAY_US function cause any watchdog reset?

2) If I increase time DEVICE_DELAY_US(500000), does my watchdog reset?

3) Is it safe to use DEVICE_DELAY_US in ADC interrupts?

4) In which condition, I shouldn't use DEVICE_DELAY_US?

5 months ago

0 Ozino Odharo 4 months ago

TI__Genius 17973 points

Hi Gokhan,

Where are you trying to use DEVICE_DELAY_US in your application? What is your intended purpose? What are you trying to use a watchdog timer for?

It should be noted that the watchdog generates either a reset or an interrupt. It is clocked from the internal oscillator with a selectable frequency divider.

It should be noted that one of the watchdog's primary purposes is that it generates reset if CPU gets stuck in endless loops of execution. I would recommend using the DEVICE_DELAY_US if you are looking to introduce general delay in your application. The watchdog will force a device reset via driving XRSn pin low.

For more information on the Watchdog, checking out the academy section on the watchdog to understand more about its intended purposes. https://dev.ti.com/tirex/local?id=source_c2000_system_c2000_timers&packageId=C28X-ACADEMY

I also recommend that you check out the example watchdog examples available in C2000Ware. https://dev.ti.com/tirex/explore/node?node=A__AGy3Bxi2Nl9xQWDGQjK6jQ__C2000WARE__1kRFgrO__LATEST&placeholder=true

Regards,

Ozino

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280038C-Q1: DEVICE_DELAY_US function and WATCHDOG reset mech.