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Original question:

[FAQ] IWRL6432: Exporting the radar cube over UART

IWRL6432: Limitation for exporting Radar Cube

Se Ho Kim
Prodigy 110 points
Part Number: IWRL6432

Tool/software:

Dear TI experts,

I have been trying to export Radar Cube continuously for IWRL6432Boost kit. 

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1403302/iwrl6432-exporting-the-radar-cube-over-uart/5378142#5378142

I have made modifications and am able to receive radar cube once, then radar would stop transmitting radar cube. 

Configuration I am using is following (skipped ). 

sensorStop 0

channelCfg 7 3 0

chirpComnCfg 15 0 0 128 1 34 3

chirpTimingCfg 6 26 1 47.95 60

frameCfg 2 0 600 64 200 0

guiMonitor 0 0 0 0 0 0 0 0 0 0 0

clutterRemoval 0

adcLogging 0

lowPowerCfg 0

baudRate 1250000

sensorStart 0 0 0 0

I was searching through forums and found https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1310488/iwrl6432boost-not-able-to-read-continuous-data-frames

The post says to change frameCfg 2 0 250 32 250 0 → frameCfg 2 0 250 32 1000 0

 

I am curious what are the limitation for exporting radar cube.

In the above configuration, I disabled all the guimonitor so that I would have more space in uart communication. 

But it seems like it cannot achieve 5 Hz frame rate while exporting through UART since the radar cube size would be 96kbs and uart speed will only be at 1.25 Mbits/s, is this understanding correct?

If this is true, would it be possible to stream radar cube data through SPI? What modifications are needed to do so?

Best Regards,

Seho Kim

  • 0
    TI__Mastermind 21071 points

    Hello Seho Kim, 

    Your understanding is correct. With that size radar cube, it would take ~630 ms to output over UART at 1.25 Mbits/s so 5 Hz frame rate (200 ms frame period) would not be possible. 

    It is possible to output the radar cube over SPI for faster transmit times. As it so happens, our latest radar toolbox release (2.20.xx) added an example for doing this. I am linking the user guide here.

    Best Regards,

    Josh