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AWR6843ISK: Regarding the LVDS Data Stream of AWR6843ISK EVM

Part Number: AWR6843ISK
Other Parts Discussed in Thread: UNIFLASH,

Tool/software:

Dear TI Engineer,

Hello! I am writing to seek your help regarding an engineering issue I am currently facing.

I used the Uniflash software to download the bitstream file of the "<out of box 6843 isk mss>" project example in CCS to the AWR6843ISK.

The CLI commands configured through the serial port are as follows

sensorStop

flushCfg

dfeDataOutputMode 1

channelCfg 15 7 0

adcCfg 2 1

adcbufCfg -1 0 1 1 1

profileCfg 0 60 359 7 57.14 0 0 70 1 256 10093 0 0 158

chirpCfg 0 0 0 0 0 0 0 1

chirpCfg 1 1 0 0 0 0 0 4

chirpCfg 2 2 0 0 0 0 0 2

frameCfg 0 0 16 0 100 1 0

lowPower 0 0

guiMonitor -1 0 0 0 0 0 0

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

bpmCfg -1 0 0 1

lvdsStreamCfg -1 1 1 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 5 121 0

CQSigImgMonitor 0 123 8

analogMonitor 0 0

aoaFovCfg -1 -90 90 -90 90

cfarFovCfg -1 0 0 17.30

cfarFovCfg -1 1 -1 1.00

calibData 0 0 0

sensorStart

After sending the commands, the EVM responds with:

"Debug: Init Calibration Status = 0x1ffe
Done"

I am able to receive the ADC raw data stream output by the radar through the high - density connector of the EVM.

I can also detect the encoding of the HSI header, and I find that the data following the HSI header in each LVDS data packet is the raw data of the 4 enabled receive antennas.

However, I am unable to find any information about the transmit antennas in the obtained series of LVDS data packets.

During the operation of the radar, 3 transmit antennas work in turn according to the principle of time - division multiplexing. But in the acquired LVDS data, I cannot find which transmit antenna has generated the data of the current LVDS data packet. Therefore, I urgently need the help of your company's engineers.

Thank you very much for your time and support. I look forward to your reply.

Best regards,

jsong lee

  • Hi, Jsong:

    I am usually use LVDS streaming without header information

    lvdsStreamCfg -1 0 1 0

    I will make sure the DCA1000 start capture before radar sensorStart.  In this way, DCA1000 will be able to capture the radar data from the very first sample in the first frame.  So users can interpolate the data correctly. 

    Let me know it makes sense to you.

    Best,

    Zigang