F29H850TU: F29H850 MCAN does not resume CAN communication after breakpoint halt; CCCR.CSR, CCCR.CSA, INIT become 1

Islam Baigaliyev

Prodigy 20 points

Part Number: F29H850TU

Hi,

I am working with the F29H850 MCAN module and I am seeing an issue after using a debugger breakpoint.

Issue:
If I stop the application at a breakpoint and then resume execution, CAN communication does not start again.

After resume, I observe the following MCAN bits:

CCCR.CSR = 1
CCCR.CSA = 1
CCCR.INIT = 1

Is this expected behavior when the CPU is halted at a breakpoint?
Does the MCAN module enter clock-stop mode automatically during debug halt?
Is a full MCAN reinitialization required after breakpoint resume?

Thank you!

2 months ago

0 Pranav Siddappa 2 months ago

TI__Intellectual 2616 points

Hi Islam,

Are you using the SDK or MCAL for your application?

Regards,

Pranav Siddappa

0 Islam Baigaliyev 2 months ago in reply to Pranav Siddappa

Prodigy 20 points

Hi Pranav,
Thanks for your response.
The application is not using MCAL, and it is not currently using the SDK. But, it was originally based on the TI SDK example / initialization flow, and then adapted into my own code.

0 Pranav Siddappa 2 months ago in reply to Islam Baigaliyev

TI__Intellectual 2616 points

Hi Islam,

Can you give me a more clear idea of what you are trying to do? Information on:

What functionality is being tested?
Why was the breakpoint added?
Since its neither MCAL nor SDK, are you performing resister read write operations in your application?

Regards,
Pranav Siddappa

C2000™︎ microcontrollers

C2000 microcontrollers forum

F29H850TU: F29H850 MCAN does not resume CAN communication after breakpoint halt; CCCR.CSR, CCCR.CSA, INIT become 1