Hello,

On Tue, Aug 06, 2019 at 11:26:59AM -0300, Marcio Montenegro wrote:
> I am evaluating STM32WB55  board HCI driver.
> During my test I found that BLE  public address is  02:80:e1:00:00:00
> But this microcontroller has an internal flash register to store BLE
> address and device id.
> I would like to know the best way to change the address BLE in this case.
> Best regards,
> Marcio
>
> BLE Stack initialization:
>
> [00:00:00.015,000] <dbg> bt_settings.bt_settings_init:
> Bluetooth initialized
> Configuration mode: waiting connections...
> [00:00:00.187,000] <inf> bt_hci_core: Identity: 02:80:e1:00:00:00 (public)
> [00:00:00.187,000] <inf> bt_hci_core: HCI: version 5.0 (0x09) revision
> 0x0026, manufacturer 0x0030
> [00:00:00.187,000] <inf> bt_hci_core: LMP: version 5.0 (0x09) subver 0x2126
>
> Get correct BLE address:
>
> udn = LL_FLASH_GetUDN();
> if(udn != 0xFFFFFFFF)
> {
>     company_id = LL_FLASH_GetSTCompanyID();
>     device_id = LL_FLASH_GetDeviceID();
>
>     bd_addr_udn[0] = (uint8_t)(udn & 0x000000FF);
>     bd_addr_udn[1] = (uint8_t)( (udn & 0x0000FF00) >> 8 );
>     bd_addr_udn[2] = (uint8_t)( (udn & 0x00FF0000) >> 16 );
>     bd_addr_udn[3] = (uint8_t)device_id;
>     bd_addr_udn[4] = (uint8_t)(company_id & 0x000000FF);;
>     bd_addr_udn[5] = (uint8_t)( (company_id & 0x0000FF00) >> 8 );
>     bd_addr = (const uint8_t *)bd_addr_udn;
>
> }

I have not yet worked with any of the bluetooth APIs, but this thread
peaked my interest because I am also evaluating the STM32WB55 for an
upcoming project.

I did a quick search through the bluetooth API and found the function
bt_ctlr_set_public_addr [1]. I started digging into its implementation,
but I was not able to figure out how this function relates to the rest
of the bluetooth system, or how it relates to the STM32WB55 LL/HAL.

I would recommend trying this function to see if it meets your needs.
Please let me know if it works! I'm definitely curious to know how this
might work with the STM32WB55.

Cheers,
Rob Weber

[1] https://docs.zephyrproject.org/latest/reference/bluetooth/controller.html#_CPPv323bt_ctlr_set_public_addrPK4u8_t