topic Re: BLE BD address generation in Wireless MCU

BLE BD address generation

pangya — Wed, 14 May 2025 12:16:52 GMT

The BD address is generated according to the radio RADIO_CTRL->UID_LSB and random numbers, but why do I access the RADIO_CTRL->UID_LSB register with 0xff, what is the IFR address mapped by this register? Is the UID provided by the chip factory?

Re: BLE BD address generation

luis_maravilla — Thu, 15 May 2025 16:15:01 GMT

Hello

Could you help us confirm the following question to have more context, please:

What NXP chip are you using?

What example are you using? What SDK version are you using?

Best Regards

Luis

Re: BLE BD address generation

pangya — Fri, 16 May 2025 02:07:31 GMT

Hello

1.KW45B41
2.adv_ext_peripheral, SDK_24_12_00_KW45B41Z-EVK.
Does the K45 chip currently have a public SIG-assigned address? I need each device's BD_ADDR to be immutable. Alternatively, can a unique and permanent BD_ADDR be generated from the chip's unique ID?

Re: BLE BD address generation

pangya — Mon, 19 May 2025 07:59:47 GMT

Hello

Are there any updates on the issue?

Best Regards

pangya

Re: BLE BD address generation

luis_maravilla — Wed, 21 May 2025 21:45:08 GMT

Hello

The KW45B41 is the EVK, LOC or a Custom Board? I need to confirm this as NXP boards have some configuration predetermined.

Re: BLE BD address generation

pangya — Tue, 27 May 2025 01:50:11 GMT

Hello

EVK

Re: BLE BD address generation

luis_maravilla — Tue, 27 May 2025 20:20:42 GMT

Hello

The SDK uses a public device address by default and has a fixed OUI

I would recommend checking this application note as I believe it might solve your doubts regarding BD Address

Chapter 2 - Why do we need random static device address

AN14645: How to Use Random Static Device Address for Bluetooth Application | NXP Semiconductors

Best Regards

Luis