How to get the raw data and transmit through USB?

Wireless Connectivity Ultra-Wideband
1

I am trying to get the raw data from antenna, as I want to make the DWM3001CDK works like radar, which TX certain wave then RX the reflation wave.

I found the sample codes seems not work with FreeRTOS, and I have try the “Example 02j: simple capture and reading of ADC samples”, which doesn’t work.

2

Hello @htl ,

Unfortunately, the DW3000 is only capable of transmitting or receiving (but not both) at a given time. Therefore, to experiment with radar, you would need to use 2 DW3000 devices.

Here is a research paper where 2x DW3000 devices were used: UWB Bistatic Radar Sensor: Across Channels Evaluation | IEEE Journals & Magazine | IEEE Xplore

We also have a future product more targeted for radar. Please see the the note from @Yves_Bernard_Qorvo here: Using your product for UWB sensing ( like radar) - #2 by Yves_Bernard_Qorvo

3

Thanks for your reply.

I would like to know if there a way to extract the raw RX data from the devices?
Thanks

4

You may try to look at the ex_02k_simple_rx_cir from our SDK

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5

Sadly I realized that the SDK only has targets for nRF52840-DK and STM_Nucleo_F429, but I am using DWM3001CDK. The program complies from serger embedded studio just not work.

And I notice that the header files are quite different from FreeRTOS’s, I have no idea how to migrate it to an RTOS app.

And the ex_02k_simple_rx_cir retrieve the CIR with frames received, but what I need is to get the raw data of antenna even without any frames.

Thus do you know how to turn the antenna always on RX mode and get the raw data from some registers?

Thanks so much.

6

You can get the latest version of the SDK which supports the DWM3001CDK here: https://www.qorvo.com/products/d/da008582

Concerning the raw data from antenna, it not possible to retrieve them. The best you can get are the Channel Impulse Response (CIR) estimation plus some other registers to help processing the CIR (First path index, peak path index, …). The CIR is usually the raw data used for UWB Radar, thanks to this, you can explore and develop algorithms for a lot of different use cases like presence detection, breathing detection, gesture recognition, even heartbeat monitoring…

7

Hi, I would really appreciate about more details on how to apply the example code shown in ex_02k_simple_rx_cir.

I am using the latest version of the SDK, and I have successfully built and flashed the firmware source code into the DWM3001CDK.

But I don’t have a clue about how to use the example code. Should I wrap this function into a task in FreeRTOS and modify the code in SDK\Firmware\DW3_QM33_SDK_1.0.2\Project\DW3_QM33_SDK\FreeRTOS\DW3_QM33_SDK-FreeRTOS-Common\main_cli.c, and then try to rebuild the firmware and flash it to the board?

I am really new to embedded system development, and I really appreciate any help!

8

There are 2 parts in the SDK:

  • first part is the driver, which is in the Driversdirectory. It contains Driver API doc, source code and examples on how to use the driver.
  • second part is the SDK in itself, in the SDKdirectory. It contains everything to develop your own Fira-based application, (with CLI or UCI interface). It is based on Free RTOS, contains binary libs for Fira and IEEE 802.15.4z support, as well as the Drivers.

If you want to only run this example, the easiest would to start from the Driver example Segger Embedded Studio project which is in Drivers\API\Build_Platforms\nRF52840-DK directory.
If you want to start from the SDK, you should tweak the source code in order to remove the use of the fira library, and call the driver APIs by yourself.

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