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IWR6843AOPEVM: How to configure sensor of use with external microcontroller

Marius von Wisotzky
Prodigy 30 points
Part Number: IWR6843AOPEVM
Other Parts Discussed in Thread: UNIFLASH

Good morning,

1. I have configured the mmWave Sensor IWR6843AOPEVM with mmWaveDemoVisualizer but don't get any data after switching to a microcontroller, which shall read the data. I have the assumption that the mmWaveDemoVisualizer configures the sensor only temporarily and the configuration gets lost after power-off of the sensor. Is that the case? 

2. How do I configure the sensor correctly and permanently? I have found an example file to use with Uniflash, but the COM does not connect (I double checked that it is the right COM) and the sensor is being found when using mmWave Sensor. 

3. If (2) is the way to go: How do I set parameters in such a file alike the parameters I can set in mmWaveDemoVisualizer? How do I make such a file?

Note: I do not have any additional hardware such as DCA1000. Do I need it for this?

Thank you very much in advance!

Sincerely

Marius von Wisotzky

  • +1
    TI__Mastermind 19470 points

    Hello Marius.

    Please double check that you are switching appropriately between functional and flashing mode.  I have linked the guide below.

    https://dev.ti.com/tirex/explore/node?node=APR4NbV00IeYkywyV9UT7g__VLyFKFf__LATEST

    Sincerely,

    Santosh

  • 0 in reply to Santosh Krishnan
    Prodigy 30 points

    Hello Santosh,

    thank you very much for your support. This helped and I successflully flashed the radar sensor. I am now able to read data when connected to PC, but I do not get any data by the sensor when connected to a microcontroller (Rx/Tx LED does not blink and there's no signal). I am in functional mode. I have 3.3V on the USB port (do I need 5V??), and in case 3.3V is not enough, connected a pc for additional 5V on the 2nd USB port for power only. Hence all LEDs are enlightened which would be if the radar sensor was connected to pc directly.

    Could you help?

    Thank you,

    Marius

  • 0 in reply to Marius von Wisotzky
    TI__Mastermind 19470 points

    Hi Marius.

    Are you connecting the radar to both the PC and the microcontroller?  A COM port will not be available to flash if it is being occupied by something else as UART is unidirectional.  If this is the case, please only use one or the other.  I would also make sure you install the drivers that are linked in the out of box demo.  With regards to configuration, please make sure you are resending the configuration file/parameters each time and that sensorStart is successfully sent from the microcontroller.

    Sincerely,

    Santosh