MATLAB Answers

What's Remap ePWMs for DMA access (Requires silicon revision A and above) means?

1 view (last 30 days)
Xu Liu
Xu Liu on 4 Jul 2019
Commented: Xu Liu on 4 Jul 2019
hello everyone,im doing code generation with c2000 devices,
when I make the model of 28377d to relocated 28335,im facing this choise :Remap ePWMs for DMA access (Requires silicon revision A and above)
whether i need to choise it? does there anyone have the same doubt?

  0 Comments

Sign in to comment.

Accepted Answer

Venkatesh Chilapur
Venkatesh Chilapur on 4 Jul 2019
Hi Xu,
You find DMA configuration under hardware Implementation pane:
Capture.JPG

  2 Comments

Xu Liu
Xu Liu on 4 Jul 2019
that's the point,it's very kind of you ,thanks.i guess i need to study harder.
Xu Liu
Xu Liu on 4 Jul 2019
it looks like you are quite good at 335,i wonder whether use DMA could be better for my project? as i know DMA seems a enrich function for data transfer and reducing cpu time, so if its so useful, whether just choise this function with my work is better?

Sign in to comment.

More Answers (1)

Venkatesh Chilapur
Venkatesh Chilapur on 4 Jul 2019
Hi Xu,
From device data sheet if the silicon version is >='A' then we have the following details.
"By default, ePWM and HRPWM registers are mapped to Peripheral Frame 1 (PF1). Table 6-4 shows this
configuration. To re-map the registers to Peripheral Frame 3 (PF3) to enable DMA access, bit 0 (MAPEPWM) of
MAPCNF register (address 0x702E) must be set to 1. Table 6-5 shows the remapped configuration" of section 6.2.3.
So to use DMA with ePWM module we need to enable the re-map.
HTH,
Regards,
Venkatesh C

  1 Comment

Xu Liu
Xu Liu on 4 Jul 2019
Thank you very much for your answer!
Another question is that I haven't seen dma module, is embedded coder automatically optimized for use?

Sign in to comment.

Sign in to answer this question.


Translated by