CCS/IWR1443BOOST: mmWave Demo Data Output

Kyle Henderson

Part Number: IWR1443BOOST

Tool/software: Code Composer Studio

Hi,

I am trying to use the mmWave demo for fluid level sensing of two liquids in a tank. I am not using the mmWave demo visualizer for this application, and I would like to take the data that is being sent to the GUI and convert this into distance in meters of two liquids. I am only concerned with getting the actual distances, and am not worrying about other data.

I found that the data for distance is sent over UART to the GUI in this form:

typedef volatile struct MmwDemo_detectedObj_t

{

uint16_t rangeIdx;

int16_t dopplerIdx;

uint16_t peakVal;

int16_t x;

int16_t y;

int16_t z;

} MmwDemo_detectedObj;

Is there a simple way I can use this data to find the distance of an object in meters? I looked at the mmWave demo visualizer GUI code to try to find how it's done there, but It's hard to understand for me. I'm hoping there is a simple equation using this data to find an object distance in meters.

Thanks,

Kyle

over 6 years ago

0 JohnH over 6 years ago

TI__Mastermind 21295 points

Hello Kyle,

X, Y, and Z are in meters in Q-format. The Y-axis is straight away from the antenna. The xyzQFormat is found at the beginning of the list of detected objects. Please see the demo documentation for more details ( C:/ti/mmwave_sdk_<ver>/docs/mmwave_sdk_module_documentation.html ).

For example, to get Y in meters you would calculate:
float Y_in_meters = (float) y / (2^xyzQFormat)

Please also see the following post for more details.

http://e2e.ti.com/support/sensors/f/1023/p/730926/2707925#2707925

Regards,

John

0 Kyle Henderson over 6 years ago in reply to JohnH

Prodigy 120 points

Hi John,

Thank you, I just tested it and was able to get correct range data in meters.

Thanks,
Kyle

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CCS/IWR1443BOOST: mmWave Demo Data Output