IWR6843AOPEVM: OOB Demo: Error when configuring multiple chirp for a single frame.

Hi Loi,

First, I would recommend copy/pasting your configuration into the mmWave Sensing estimator to see if your chirp configuration is valid or not: https://dev.ti.com/gallery/view/mmwave/mmWaveSensingEstimator/ 

I have done that for your current configuration and it seems to be okay. I am not sure about the 12 transmit antennas. That seems wrong to me. With 4 RX and 3 TX, you should have 12 virtual RX antennas.

Second, the sensing estimator only checks your chirp configuration. I would suspect that another parameter you are passing in may be wrong. Can you try comparing your configuration to a default OOB configuration and reporting back what the differences are? We can go from there.

Regards,

Tim

Hi Tim,

Thank you for your reply. Here is the original .cfg file that I tested and ran on the board.

sensorStop
flushCfg
dfeDataOutputMode 1
channelCfg 15 7 0
adcCfg 2 1
adcbufCfg -1 0 1 1 1
profileCfg 0 60 8 7 17.75 0 0 80 1 124 11809 0 0 158
chirpCfg 0 0 0 0 0 0 0 1
chirpCfg 1 1 0 0 0 0 0 2
chirpCfg 2 2 0 0 0 0 0 4
frameCfg 0 2 16 0 100 1 0
lowPower 0 0
guiMonitor -1 1 1 0 0 0 1
cfarCfg -1 0 2 8 4 3 0 15 1
cfarCfg -1 1 0 4 2 3 1 15 1
multiObjBeamForming -1 1 0.5
clutterRemoval -1 0
calibDcRangeSig -1 0 -5 8 256
extendedMaxVelocity -1 0
lvdsStreamCfg -1 0 0 0
compRangeBiasAndRxChanPhase 0.0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0
measureRangeBiasAndRxChanPhase 0 1.5 0.2
CQRxSatMonitor 0 3 5 103 0
CQSigImgMonitor 0 123 8
analogMonitor 0 0
aoaFovCfg -1 -90 90 -90 90
cfarFovCfg -1 0 0 17.71
cfarFovCfg -1 1 -7.18 7.18
calibData 0 0 0
sensorStart

Here is the diff check.

I tried to add 3 profileCfg and 9 chirpCfg with identifiers from 0-11 and configure the radar to use all of these chirps in a single frame. I don't really know if this is the right way to do it.

Thanks,

Loi.

Hi Tim.

Thank you for your help. That is unfortunate, but it explains why the EVM doesn't accept more than 1 chirp per antenna.