CLA debug

vadim piskun

Hi Lori,

I would like to come back to the original issues with debugging. TRM chapter 6 says:

Single-step the CLA code

Once halted, the user can single-step the CLA code. The behavior of a CLA single-step is different than the main C28x. When issuing a CLA single-step, the pipeline is clocked only one cycle and then again frozen. On the 28x CPU, the pipeline is flushed for each single-step. You can also run to the next MDEBUGSTOP or to the end of the task. If another task is pending, it will automatically start when you run to the end of the task.

I added __mdebugstop() after each instruction, hoping to single step with flash. Here is the result. Why is this discrepancy yn = 2170.; (int) fTemp = -2308 ; fTemp = 1.158e+9. Those should be the same number. Why the difference? How can I debug this?

thanks vadim

over 4 years ago

0 Lori Heustess over 4 years ago

TI__Guru* 92780 points

Vadim,

This seems to be related to your question here: https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/969560

Was the previous question resolved?

How are the variables defined?

Does fDelayLine[] look correctly initialized ? What about W[i] ?

Are they shared with the C28x? If yes: Check that the guidelines for sharing variables has been followed.

https://software-dl.ti.com/C2000/docs/cla_software_dev_guide/faq.html#how-is-data-shared-between-the-cla-and-c28x

And make sure datatype differences has been taken into consideration:

https://software-dl.ti.com/C2000/docs/cla_software_dev_guide/faq.html#how-are-data-types-different-on-c28x-and-cla

0 vadim piskun over 4 years ago in reply to Lori Heustess

Expert 2230 points

Hi Lori,

I did found a problem with matching data types, in c file they were declared as float and shared.h as long. It works as expected after correction. Thank you for you help!

Please put the example for CLA in c for hardware early ADC interrupt

thanks vadim

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CLA debug