CCS/TMS320F28377D: ePWM trigger CLA task problem

Willie LAi

Intellectual 270 points

Part Number: TMS320F28377D

Tool/software: Code Composer Studio

Hi, I'm using ePWM CMPB to trigger a CLA task.

However, the counter in CLA only count once.

If ePWM trigger CPU isr then trigger CLA(asm(" IACK #0x0001")), it works.

After CLA task, I dont need to trigger CPU Isr, so there is no CLA_INT, which means

// PieVectTable.CLA1_1_INT   = &cla1Isr1;

My reference e2e doc is: e2e.ti.com/.../618912

over 7 years ago

0 Sal Pezzino over 7 years ago

TI__Mastermind 32995 points

Hi Willie,

What do you mean it only counts once? Please clarify your question or issue?

Also, unless you need the C28x to do some processing before triggering the CLA task, you can just have the PWM signal trigger the CLA task.

Regards,
sal

0 Willie LAi over 7 years ago in reply to Sal Pezzino

Intellectual 270 points

Hi Sal,
Thanks for your rapid reply.
I set a counter at CLA task, if go into CLA task1, then counter++, and this counter only counts once when task is triggered by PWM.
But, if I use PWM trigger CPU then CLA, this counter works well.
For this reason, I assume my PWM INT setting is correct, so I'm wondering if CLA task needs to acknowledge?

0 Sal Pezzino over 7 years ago in reply to Willie LAi

TI__Mastermind 32995 points

Does your CLA task complete execution my executing an MSTOP instruction?

Check the MIRUN register to see if the task is never stopping. Also, make sure you are getting multiple PWM interrupts and clear the PIE ACK register for the PWM interrupt to occur again.

sal