Set public address(MAC) without BLE stack

RE: Set public address(MAC) without BLE stack

Øyvind Karlsen — Wed, 10 Jun 2015 13:45:11 GMT

Hi again,

To set the MAC address you must populate the beacon_init.beacon_addr.addr struct which is done by the piece of code I linked above.

RE: Set public address(MAC) without BLE stack

jayesh — Wed, 10 Jun 2015 13:07:19 GMT

Here my goal is to continuously advertise on three advertising channels.So i only initialized 2 things Timer and Radio. Now i have Initialized radio, adv packets, and adv channels funtions. Now on which registers or function should i enter above MAC address values so during advertising of the device i can see MAC address. JAyesh

RE: Set public address(MAC) without BLE stack

Øyvind Karlsen — Wed, 10 Jun 2015 12:50:23 GMT

Hi again,

You can implement the sd_ble_gap_adress_get() without using the BLE stack like this:

// BLE_GAP_ADDR_TYPE_RANDOM_STATIC = 1.
    beacon_init.beacon_addr.addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC;
    beacon_init.beacon_addr.addr[0] = (uint8_t)NRF_FICR->DEVICEADDR[0];
    beacon_init.beacon_addr.addr[1] = (uint8_t)(NRF_FICR->DEVICEADDR[0]>>8);
    beacon_init.beacon_addr.addr[2] = (uint8_t)(NRF_FICR->DEVICEADDR[0]>>16);
    beacon_init.beacon_addr.addr[3] = (uint8_t)(NRF_FICR->DEVICEADDR[0]>>24);
    
    beacon_init.beacon_addr.addr[4] = (uint8_t)NRF_FICR->DEVICEADDR[1];
    //2 MSBit must be '11' for RANDOM_STATIC, see Corespec v4.0, Vol 3, Part C, chapter 10.8
    beacon_init.beacon_addr.addr[5] = (uint8_t)(NRF_FICR->DEVICEADDR[1]>>8) | 0xC0;

Hopefully this answers your question

RE: Set public address(MAC) without BLE stack

jayesh — Wed, 10 Jun 2015 11:25:55 GMT

ya i was able to get radio initialization,but my question remains, here i am not able to set MAC address without stack code i could only set by using sd_ble_gap_address_get which is called in beacon_adv_init funtion which is generally a stack call right.

RE: Set public address(MAC) without BLE stack

Øyvind Karlsen — Tue, 09 Jun 2015 13:42:18 GMT

This is using a timeslot between events where it sets up the radio as an advertiser without using the BLE stack.

RE: Set public address(MAC) without BLE stack

jayesh — Tue, 09 Jun 2015 13:39:45 GMT

But this must be using BLE stack right... and i want to develop without BLE stack

RE: Set public address(MAC) without BLE stack

Øyvind Karlsen — Tue, 09 Jun 2015 13:27:38 GMT

Hi, the sample code is found in the SDK, extract this and navigate to ("..\examples\experimental_ble_app_multiactivity_beacon\hrs_advertiser\pca10028\s110\arm5_no_packs") where you will find the Keil project.

RE: Set public address(MAC) without BLE stack

jayesh — Tue, 09 Jun 2015 13:25:24 GMT

Can you give me the link for that sample code.

RE: Set public address(MAC) without BLE stack

Øyvind Karlsen — Tue, 09 Jun 2015 13:20:44 GMT

Hi,

You can see how it is done in advertiser_beacon.c in the hrs_advertiser example from SDK 8.1. ("..\examples\experimental_ble_app_multiactivity_beacon\hrs_advertiser....") Particularly the radio configuration part should be interesting.

If you have a spectrum analyzer or a software defined radio available you can check the spectrum for any impact when transmitting, note that this might be difficult due to WiFi or other in-band noise. Hopefully this answers your question.

Best regards,

Øyvind