Transmitting Data via LE Coded PHY

[johnnyR]

I am trying to transmit data using nRF52840 DK with LE Coded PHY. 

But I'm puzzled about how it encodes the data in the payload. As stated in BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 6, Part B., Page 2923, it is required for the payload to undergo whitening then into the FEC Encoder and Pattern Mapping.

 

But in this example on, BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 6, Part C, Page 3082. The PDU is set to be 00 03 42 4C 45. 

And here below, it doesn't look like it was whitened before going into FEC Encoder and pattern mapper. Im confused on how it processes the data. Would you have some insight on what actually is transmitted on air?

Regards,

Erick

[Dmitry]

Hi Erick,

are you writing your own FEC decoder or just curious about how it works? nRF52840 radio does all that magic for you.

johnnyR said:

And here below, it doesn't look like it was whitened before going into FEC Encoder and pattern mapper.

I think, this sample packet is dumped already after whitening for simplicity (whitening sequence samples are shown later).