IWR6843ISK-ODS: how to use CBUFF Transfers radar cube data by the sw triggered mode through lvds interface?

tim zhao

Part Number: IWR6843ISK-ODS
Other Parts Discussed in Thread: MMWAVE-SDK

Hello TI Team

We can capture raw data using the dca1000evm board through the lvds high-speed interface, currently we need 1D (range fft) or 2D (doppler fft) data to be transmitted through lvds.

We need to know the detailed steps to trigger edma by sw. The current oob demo only provides routines triggered by hardware, and there is no description of sw, so we can't try how to do it.

Thank you for your great support.

over 4 years ago

0 Nitin Sakhuja over 4 years ago

TI__Mastermind 30405 points

Hello,

Please refer to the following post:

AWR1843: Need help to send a mount of data through LVDS when using MRR demo or MMW demo

Thanks

-Nitin

0 tim zhao over 4 years ago in reply to Nitin Sakhuja

Intellectual 981 points

Hi Nitin

I have seen this link before, but did not describe the detailed steps. This is about how the datapath is designed inside the chip.
I have not seen a detailed description of how to trigger cbuff through the software mode. We don’t know where the problem is. ,
I am not sure how to debug next, please understand, thank you.

0 Nitin Sakhuja over 4 years ago in reply to tim zhao

TI__Mastermind 30405 points

Hello,

I am not sure if you have looked at the last response to the above thread, which provides the pseudo code to get radar cube data out along-with references to the relevant code sections in the OOB demo, so linking the specific response below again:

https://e2e.ti.com/support/sensors/f/1023/p/885225/3329328#3329328

Regarding your question on EDMA SW trigger, please refer to the EDMA resources pointed to in the following thread:

IWR1642BOOST: mmwave demo: get data from radar cube

Also refer to the cbuff driver test provided in the SDK as given below:

C:\ti\mmwave_sdk_03_05_00_04\packages\ti\drivers\cbuff\test\xwr68xx

0 tim zhao over 4 years ago in reply to Nitin Sakhuja

Intellectual 981 points

Hello Nitin

We have seen this link, but it is not detailed enough. We have modified it according to the code, but failed.
so I don't know what the problem is. There are many modules involved, such as HSI,CBUFF,EDMA, and LVDS...
Could you please provide a clear description document? Thanks!

0 Nitin Sakhuja over 4 years ago in reply to tim zhao

TI__Mastermind 30405 points

Hi Tim,

The steps identified in the above link should be sufficient to modify the existing LVDS streaming infrastructure in the OOB demo to stream out the radar cube.

Please refer to the following document for more details on CBUFF configuration:

AWR1xx and AWR22xx Data Path Programmer's Guide

You may also want to refer to the MMWAVE-SDK CBUFF driver test:

C:\ti\mmwave_sdk_03_05_00_04\packages\ti\drivers\cbuff\test

0 tim zhao over 4 years ago in reply to Nitin Sakhuja

Intellectual 981 points

Hi Nitin

ok, i see,thanks a lot again!

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IWR6843ISK-ODS: how to use CBUFF Transfers radar cube data by the sw triggered mode through lvds interface?