CCS/TMS320F28377D: About TMS320F28377D CPU2 Watchdog

Squallbilly

Tool/software: Code Composer Studio

Hello!

I want to use watchdog to reset CPU2 separately, but I found that when the watchdog of CPU2 overflowed, CPU1 and CPU2 seemed to be stuck and could not run again. would you please tell me why? thank you.

over 7 years ago

0 Vivek Singh over 7 years ago

TI__Guru** 117441 points

Hi,

CPU2 reset will reset only CPU2 so if there is any handshake between CPU1 and CPU2 in CPU2 code, it'll not work unless CPU1 takes care of this. What you could do is bypass this handshake in CPU2 code if reset is caused by CPU2 WD.

Regards,

Vivek Singh

0 Squallbilly over 7 years ago in reply to Vivek Singh

Prodigy 60 points

hi:
Could you be more specific?

0 Squallbilly over 7 years ago in reply to Vivek Singh

Prodigy 60 points

Counld you please give me a more specific about this issue? I don't know how to solve this issue, thanks.

0 Vivek Singh over 7 years ago in reply to Squallbilly

TI__Guru** 117441 points

Hi,

In your code if you have a handshake between CPU1 and CPU2, after CPU2 WD reset, CPU2 will run from start and will wait for handshake from CPU1 where as CPU1 will not respond to this handshake since it's not running from start. What you have to do is to have CPU1 NMI handler and if NMI is because of CPU2 reset then respond to CPU2 handshake.

If you could attach your CPU1 and CPU2 code, I can exactly point the issue.

Regards,
Vivek Singh

0 Vivek Singh over 7 years ago in reply to Vivek Singh

TI__Guru** 117441 points

I am assuming you were able to resolve the issue hence closing the post.

Vivek Singh

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CCS/TMS320F28377D: About TMS320F28377D CPU2 Watchdog