DTM command sequence

[beemavishnu]

Hello,

 

I am using nRF52840, SDK_16.0.0, S140 SoftDevice and Segger 4.16 for flashing the image.

 

I am new to DTM. I have related queries.

 

1) In nAN34 note, what does “Untested” and “Tested” mean as part of DTM test setup ? Whether it says Untested device and after performing tests (DUT), then the device is marked as Tested.

1. 1. (Or) Will there be any Golden sample in DTM test setup. If Yes, how to get Golden sample for first time.

2) For UART LE_Test_Setup command there is no corresponding HCI command. Then in that case how to set PHY layer.

 

3) For UART LE_Transmitter_Test there is a Packet Type 11 for Vendor specific. But the same I am not able to find in HCI HCI_LE_Transmitter_Test packet. Whether we cannot do Vendor specific in HCI test packets.

 

4) As per Bluetooth SIG, LE_Test_Setup command is sent to configure PHY layer. But in below link I am not seeing LE_Test_Setup command under “State machine overview of the DTM”.

1. 1. If LE_Reset is same as LE_Test_Setup then why it is sent last after LE_Test_End. Should not LE_Reset be first command before sending any LE_Receiver_Test or LE_Transmitter_Test so that PHY is configured to required and then do required test.

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v16.0.0%2Fble_sdk_app_dtm_serial.html&cp=7_1_4_5

Thanks & Regards

Vishnu Beema

[run_ar]

1. untested, is devices waiting to be tested. While tested is devices that has completed the test.

2. Our DTM implementation does not support HCI, only UART - DTM. The phy is changed as part of the test setup command. See the bluetooth core spec. Volum 6. Part F: Direct test mode. Chapter 3.3.2 Commands has a list of the supported commands.

3. See Vendor Specific packet payload

4. Test setup command is supported.

[beemavishnu]

Thank you for your inputs.

Can you please respond on 3 & 4.a query. 

3) Yes UART Vendor specific, I can understand. How about HCI Vendor specific. This is for my better understanding though Nordic does not support.

4.a) Why LE_Reset / LE_Test_Setup is sent at last rather than beginning of the the setup.

Thanks & Regards

Vishnu Beema

[run_ar]

3. not sure about HCI vendor specific I am afraid.

4. The reset on the end is there to just to do a reset. If you want to use anything else than the default parameters you should send a LE_TEST_SETUP command before starting the tests.