IWR6843ISK-ODS: EDMA SRCCIDX for transferring from ADCBuf to HWA memory shouldn't be set to zero

V Prathith Vasudev

Part Number: IWR6843ISK-ODS

Hi team,

I am running demo binary of xwr64xx in SDK version 3.5.0.4. I am having a confusion as to why, while configuring EDMAIn in rangeprochwa.c file, the srcCIdx is set to 0.

The transfer is of syncAB type and cCount is 2U. The srcCIdx should be set to the next set of frames to be transferred, but it is set to 0.

I am referring to this edma document -> https://www.ti.com/lit/ug/spruem5a/spruem5a.pdf , page 26

I am referring to this file in sdk -> C:\ti\mmwave_sdk_03_05_00_04\packages\ti\datapath\dpu\rangeproc\src\rangeprochwa.c , line 1257

According to the document, the edma, after transferring A*B bytes of data, the srcCIdx should be equal to A*B bytes to skip and go to next frame, but it is zero.

Please let me know whether there is a specific reason for this line of code to be like this. Otherwise shouldn't it be following the document?

over 4 years ago

0 Akash Gondalia over 4 years ago

TI__Guru 50240 points

Hi Prathith

I am not sure why this is the case. Are you having any issues running the demo? Or are you trying to edit EDMA transfer in any way?

Can you elaborate on why expectation is for different srcCIdx value?

Regards,

0 V Prathith Vasudev over 4 years ago in reply to Akash Gondalia

Prodigy 70 points

Hi Akash,

There is no issue in running the demo. I have not verified the output. I am just trying to experiment with EDMA transfers. To set my own config I need to follow the document. But, srcCIdx should not be zero according to document.

Regards,

Prathith

0 Akash Gondalia over 4 years ago in reply to V Prathith Vasudev

TI__Guru 50240 points

Thanks Prathith

I'll need to discuss this with my software team but I'll have an answer for you by end of week.

Regards,

0 V Prathith Vasudev over 4 years ago in reply to Akash Gondalia

Prodigy 70 points

Thanks a lot AG. Will be waiting for your reply.

0 Akash Gondalia over 4 years ago in reply to V Prathith Vasudev

TI__Guru 50240 points

Thanks Prathith

Still looking into this.

0 V Prathith Vasudev over 4 years ago in reply to Akash Gondalia

Prodigy 70 points

Hi Akash,

0 V Prathith Vasudev over 4 years ago in reply to Akash Gondalia

Prodigy 70 points

Hi Akash,

Sorry there was a mistake on my side and multiple replies have come up.

Do you have any update for me?

Thanks & Regards,

Prathith

0 Akash Gondalia over 4 years ago in reply to V Prathith Vasudev

TI__Guru 50240 points

Hi Prathith

Thanks for following up, I cannot speak to why it is this way. Have you altered this value or are you running into any issues with this variable?

Regards,

0 V Prathith Vasudev over 4 years ago in reply to Akash Gondalia

Prodigy 70 points

Hi AG,

I am not having any issues right now. I have verified the output also right now it is correct. But the document and the training video was bit different.

I will use the method used in the code itself, if required for me to alter the values in future.

I will mark this issue as resolved.

Thanks & Regards,

Prathith

Sensors

Sensors forum

IWR6843ISK-ODS: EDMA SRCCIDX for transferring from ADCBuf to HWA memory shouldn't be set to zero