[Direct Test Mode] The failed result of for nRF54L15 via SDK v3.0.0

[Paul Lin]

Hi Support team:

I am new for using the Nordic Design kit of nRF54L15-DK. 

And I would like to use the app "Direct Test Mode" v2.4.2 built-in the "nRF Connect for Desktop" v5.1.0 on my Windows OS.

But I followed up the instruction to install the SDK with v3.0.0 and burn the .hex into the board and power-on still show the error message.

Cannot communicate with the device. Make sure it is not in use by another application, that the correct serial port has been selected, and that it uses firmware compatible with Direct Test Mode.

[Håkon Alseth]

Hi,

 

Thank you for sharing the .hex file that you use. 

I was able to run this on my end, but I needed to try both COM-ports. Could you check if the other enumerated COM port, by selecting it in the top-left corner?

 

Kind regards,

Håkon

[Paul Lin]

Hi Hakon:

BTW, 

Does the packet pattern of DTM with ALL1 or ALL0?

[Paul Lin]

Hi Håkon Alseth 

Thanks for your feedback.

For Tx Power setting part,

I will try to modify and test on my site later.

For the pattern,

I only see the PRBS9/11110000/10101010/Constant Carrier. 

So if I need the ALL1(11111111) or ALL0(00000000) this kind of pattern to test the encoded PHY S2/S8 testing how can I perform?

[Paul Lin]

Hi Håkon Alseth 

I save the original .c file as backup and modified the dtm.c with this value of this line from 0 to 8.

But my parameter is not like yours at row 452 but 435.

Does any changed items for this dtm.c?

my NCS is V3.0.0 download by nrfutil

[Paul Lin]

Hi Håkon Alseth 

Sorry for the missing the information.

After i modified the .c file and delete the folder "build" and compile again. 

Burn into the board and trigger the power still around 0dBm not 8dBm what I set.

[Paul Lin]

[Håkon Alseth]

Hi,

 

Are you certain you are changing the correct file?

The line number 435 indicate that you are changing the file in NCS v2.7.0:

https://github.com/nrfconnect/sdk-nrf/blob/v2.7.0/samples/bluetooth/direct_test_mode/src/dtm.c#L435 

 

Kind regards,

Håkon

[Paul Lin]

Hi Håkon Alseth 

I download the NCS followed below command lines.

### 4.Run the following command to install the toolchain version for the SDK version of your choice: ###
nrfutil sdk-manager toolchain install --ncs-version version

For example:
C:\>nrfutil sdk-manager toolchain install --ncs-version v3.0.0

### 6. Specific release: To check out the v3.0.0 release, enter the following command: ###
(v3.0.0) C:\ncs\toolchains> west init -m github.com/.../sdk-nrf --mr v3.0.0 v3.0.0

[Håkon Alseth]

Hi,

 

I understand that you are targeting to use v3.0.0, but this comment:

Paul Lin said:

I save the original .c file as backup and modified the dtm.c with this value of this line from 0 to 8.

But my parameter is not like yours at row 452 but 435.

Does any changed items for this dtm.c?

my NCS is V3.0.0 download by nrfutil

Indicates that you are not editing the correct file. Do you have several instances of ncs installed? Could it be that you selected one of the other instances?

 

Kind regards,

Håkon

[Paul Lin]

Hi Håkon Alseth :

I found I open the wrong file and checked dtm.c after reinstalling the SDK again which the file is with correct content which the setting power is located at Row453. 

I tried to re-compile and burn again and rest to use the "direct test mode" APP to validate.

The result is fine now.

The last question is how can i pick up the packet format with ALL1(11111111) for coded PHY(S2/S8)? I can`t see the option in the list of the  "direct test mode" APP 

Best .Regards.

Paul Lin

[Håkon Alseth]

Hi Paul Lin,

 

Paul Lin said:

The result is fine now.

I am glad to hear this!

Paul Lin said:

The last question is how can i pick up the packet format with ALL1(11111111) for coded PHY(S2/S8)? I can`t see the option in the list of the  "direct test mode" APP 

You use normal BLE 1 MBit mode for RX in the case of S2/S8.

 

Kind regards,

Håkon

[Paul Lin]

Hi Håkon Alseth 

I don`t get your point.

So you meant the App can`t transmit the packet format ALL1 for coded PHY under Transmission?