RTOS/TM4C1294NCPDT: TM4C1294NCPDT

Nikhil KV1

Intellectual 500 points

Part Number: TM4C1294NCPDT

Tool/software: TI-RTOS

Hi,

I referred ti-rtos user guide to configure wdt.

By default it reset time period is 1s. But measured using oscilloscope it shows 865 milli second.

How to configure watchdog time period in this platform..

Regards

Nikhil

over 6 years ago

0 Charles Tsai over 6 years ago

TI__Guru**** 191466 points

Hi Nikhil,

You need to change the reload value to 120000000 instead of the 80000000. The TM4C129 by default runs at 120MHz. Therefore, WD reload register needs to be programmed with 120000000. The 80000000 is for the TM4C123 device which runs at 80MHz.

0 Nikhil KV1 over 6 years ago in reply to Charles Tsai

Intellectual 500 points

Hi Charles,

what is the maximum achievable period.?
Is there any prescaler or postscaler available.?

I didn't receive anything from rtos api.

Regards
Nikhil

0 Charles Tsai over 6 years ago in reply to Nikhil KV1

TI__Guru**** 191466 points

Hi,
Please refer to the device datasheet for details on the WD feature. The TM4C129 WD timer module is quite simple. There is pre or postscaler. There is only the watchdog reload register. It simply counts down until 0 by which time a reset or an NMI is generated. Whether to generate reset or NMI is programmable.

The WD timer is 32-bit. So the maximum reload value is 0xFFFFFFFF.

0 Nikhil KV1 over 6 years ago in reply to Charles Tsai

Intellectual 500 points

hi Charles,

Thanks....

Regards
Nikhil

0 Charles Tsai over 6 years ago in reply to Nikhil KV1

TI__Guru**** 191466 points

Glad it is clear to you now.

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RTOS/TM4C1294NCPDT: TM4C1294NCPDT