IWR6843ISK: 2D FFT on mmwave SDK3.5 on iwr6843isk

BODHIT Gupta

Part Number: IWR6843ISK

Hi,
1.I am working on mmwaveSDK 3.5, IWR6843ISK board and trying to extract and store Doppler FFT out in L3 memory for the doppplerprocDPU.

I have changed the pipeline slightly where i chained the DetMatrix EDMA configuration with the newly configured 2dFFT output EDMA configuration, instead of EDMA In(Radarcube to HWA memory for 2dFFT).
Also I have chained 2dFFT output EDMA configuration with the EDMA In.
which looks like this-

|-------DummyHWA-------EDMA_new_out

Radarcube-------EDMAIn------HWA(dopplerFFT+log)-------HWA(Sum of Magnitude) HWA(Dummy for storing doppler fft)-------EDMAout

I have configured a dummy HWA after Sum of Magnitude HWA, which EDMAouts the DopplerFFT data to L3.

The problem that i am facing while comparing the default pipeline DetMatrix output with my implemented
pipeline DetMatrix output is that its is matching for only 512 bytes(1 ping 1 pong) out of 8KB.

2. I want to store raw adc data for a few frames in L3 memory in the same pipeline, without disturbing the pipeline, without using the DVA1000EVM. Is it possible, how do i go ahead with it ?

Please help me resolve the issues.

Thankyou

over 3 years ago

0 Sudharshan KN over 3 years ago

TI__Genius 10550 points

Hi,

What is the chirp profile used? does it only chirp for certain frames or does it keep chirping continuously? Please let me know.

Regards,

Sudharshan K N

0 BODHIT Gupta over 3 years ago in reply to Sudharshan KN

Prodigy 50 points

It keeps chirping continuously, I am using 2Tx 3Rx,numRange bins 32, numDopplerbins 128, numDopplerchirps 104. Can you please let me know how chirp profile will make a difference here.

Thankyou

0 Sudharshan KN over 3 years ago in reply to BODHIT Gupta

TI__Genius 10550 points

Hi,

The reason for asking for whether the chirp is continuous or for certain frames is to make sure that the data is not getting overwritten form other chirps. Can you try chirping for one frame and see if the data matches? .

Regards,

Sudharshan K N

0 Sudharshan KN over 3 years ago in reply to Sudharshan KN

TI__Genius 10550 points

Hi,

Any progress with the limited frame transmission? Please let us know.

Regards,

Sudharshan K N

0 BODHIT Gupta over 3 years ago in reply to Sudharshan KN

Prodigy 50 points

Hi,

Apologies for not following up.

The above implementation was working for 2DFFT(log domain) acquisition (at the cost of loss of precision in detMatrix) after making a few changes while calling HWAinterrupt and EDMAinterrupt callback functions. However since the requirement was to extract raw 2DFFT data only, i had to configure another DPU, i.e. another Doppler_config and Doppler_process functions.

Thankyou for your Inputs.

Regards,

Bodhit

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IWR6843ISK: 2D FFT on mmwave SDK3.5 on iwr6843isk