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IWR6843ISK: Low Power Mode Firmware Consuming More Power Than Out-of-Box Firmware

Keyvan Meraat
Prodigy 60 points
Part Number: IWR6843ISK


Tool/software:

Hello,

I’m working with two IWR6843ISK radar boards.

One is flashed with the standard out-of-box binary (out_of_box_6843_isk.bin)

The other is flashed with the low power mode binary (out_of_box_6843_aop_lp.bin)

To reduce power consumption in the low power setup, I configured it with:

1 Tx antenna (out of 3 possible)

4 Rx antennas

Frame rate reduced from 10 fps to 5 fps

However, I observed that the low power mode actually consumes more current than the standard out-of-box version.

Here are the measurements:

Low Power Mode (out_of_box_6843_aop_lp.bin)
Antenna Config: 4Rx, 1Tx (60° Azimuth, 60° Elevation)
mmwDemo:/>frameCfg 0 0 16 0 200 1 0

mmwDemo:/>profileCfg 0 60 975 7 57.14 0 0 70 1 256 5209 0 0 158

Frame rate: 5 fps

Voltage: 5.08V – 5.09V

Current: 0.26A – 0.28A

Out-of-Box Demo (out_of_box_6843_isk.bin)
Default settings

mmwDemo:/>frameCfg 0 1 16 0 100 1 0

mmwDemo:/>profileCfg 0 60 459 7 57.14 0 0 70 1 256 5209 0 0 158

Voltage: 5.01V – 5.09V

Current: 0.23A – 0.26A

Voltage and current were measured using a USB meter (KCX-017).

Has anyone experienced something similar?
Is there something I might be missing in the low power configuration?

Any insights or suggestions would be appreciated!

Best regards,
Keyvan

  • 0
    TI__Mastermind 21581 points

    Hi Keyvan, 

    I'm not familiar with this issue but can you please share the full configuration that you are using with the lp demo? Are you sending the command to enable the the low power hooks (idlePowerMode 500 1 1 1 1 1)?

    Best regards,

    Josh

  • 0 in reply to Josh Dye
    Prodigy 60 points

    Hi Josh,

    Thank you for your response. I added idlePowerMode 500 1 1 1 1 1 to my config, and now I'm seeing slightly different results:

    Voltage:
    Min: 5.11 V  Max: 5.12 V

    Current:
    Min: 0.15 A  Max: 0.33 A

    The average current (0.24 A) is exactly the same as with the out_of_box configuration, which seems a bit suspicious

  • 0 in reply to Josh Dye
    Prodigy 60 points

    My Config:


    sensorStop
    flushCfg
    dfeDataOutputMode 1
    channelCfg 15 7 0
    adcCfg 2 1
    adcbufCfg -1 0 1 1 1
    profileCfg 0 60 975 7 57.14 0 0 70 1 256 5209 0 0 158
    chirpCfg 0 0 0 0 0 0 0 1
    frameCfg 0 0 16 0 200 1 0
    lowPower 1 1
    idlePowerMode 500 1 1 1 1 1
    guiMonitor -1 1 1 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
    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 5 121 0
    CQSigImgMonitor 0 127 4
    analogMonitor 0 0
    aoaFovCfg -1 -90 90 -90 90
    cfarFovCfg -1 0 0 8.92
    cfarFovCfg -1 1 -1.21 1.21
    calibData 0 0 0
    sensorStart