ESB Device address from hardware ID.

RE: ESB Device address from hardware ID.

Håkon Alseth — Wed, 11 Apr 2018 10:53:29 GMT

Hi Andre,

That is correct. This shall work for BE format.

Cheers,

Håkon

RE: ESB Device address from hardware ID.

Andre — Tue, 10 Apr 2018 15:03:45 GMT

Thanks for your quick reply,

Looking at nrf_esb.c, function update_rf_payload_format_esb_dpl, ESB is configured to use big endian.

So, if I were to use

uint32_t address = __REV(NRF_FICR->DEVICEADDR[0]);
nrf_esb_set_base_address_1( (uint8_t*)&address );

it would always be valid?

RE: ESB Device address from hardware ID.

Håkon Alseth — Tue, 10 Apr 2018 12:49:02 GMT

Hi,

The DEVICEADDR has checks for 0, 0xFF, 0x55, 0xAA in the first byte going on-air, but it has it for little-endian. If you are to use big endian packet format, you'll have to check the corresponding byte for the four non-recommended values.

You can set the endianness of the RF payload in the nRF5-series devices (NRF_RADIO->PCNF1 register, field ENDIAN), so it is important that you check for valid address based on your configured endianness.

PS: Endianness used in bluetooth LE is little endian.

Best regards,

Håkon