TMS320F280049: Get F280049 PWM pulse count with out interrupt

Johnny Shih

Intellectual 535 points

Part Number: TMS320F280049
Other Parts Discussed in Thread: C2000WARE

Dear TI Team,

My customer use F280049M for application PLC (Programmable Logic Controller),

Function request :

6 PWM (200 KHz) & they need to know how many PWM pulse count for precise pulse number,

if use PWM interrupt, capture interrupr will lose, so it need without interrupt for count PWM pulse.

over 7 years ago

0 Vasudha Bhadoria over 7 years ago

TI__Genius 10845 points

Hi Johnny,

eQEP can be used without interrupts to get the PWM pulse count.

Thanks
Vasudha

0 Johnny Shih over 7 years ago in reply to Vasudha Bhadoria

Intellectual 535 points

Dear Vasudha,

I will test QEP function of F280049 on TI EVM,

Thanks a lot for your suggestion.

0 Johnny Shih over 7 years ago in reply to Vasudha Bhadoria

Intellectual 535 points

Dear Vasudha,
I had test F280049 QEP sample code of C2000Wave (C:\ti\c2000\C2000Ware_1_00_06_00\driverlib\f28004x\examples\eqep) ,
But I found Position Counter (QPOSCNT) will loss 4 count every time?
Could you know why?

0 Himanshu Chaudhary60 over 7 years ago in reply to Johnny Shih

TI__Expert 3720 points

Hi Johnny,

Can you share the EQEP configuration structure that you have been using because the information provided by you is not sufficient to understand the issue.

Thanks

Himanshu

0 Johnny Shih over 7 years ago in reply to Himanshu Chaudhary60

Intellectual 535 points

Dear Himanshu,
I found my problem in my setting,
The function can work in my side now,
Thanks a lot for your help.

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TMS320F280049: Get F280049 PWM pulse count with out interrupt