How to get 6 byte mac address at nrf51822

Question

When I scan BLE device at nRF UARTv2.0 App in Android4.4, it is appar device name(Ex:Nordic_UART) and 6 byte device address(MAC address?).
I want to include mac address in device name.
How to get 6 byte mac address at nrf51822?

Håkon Alseth · Accepted Answer

By default, the BLE address is derived from the NRF_FICR->DEVICEADDR[] and is of 48 bits length (6 bytes).
This registers are randomly generated in our production, and they are unique for each device (2^46 different combinations, due to MSbits set to '11'). 
 You can read out the address using the API call, "sd_ble_gap_address_get(..);" or reading the FICR->DEVICEADDR[x] registers. 
 Example:
My device advertises with "0xE724 08C78790" 
 DEVICEADDR[0] = 0x08C78790
DEVICEADDR[1] = 0xYYYYA724 
 The reason why "A7" becomes "E7" is because the specification says that the 2 MSBit of the address must be set '11' (if you're very interested, see Bluetooth Core v4.0, Vol 3, Part C, chapter 10.8.1.) 
 BR
Håkon

How to get 6 byte mac address at nrf51822

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