BD address customization

Hi moguilevski,

Thanks for your post online. If I understood correctly; you would like to advertise with a different DB address when the device boot. Please correct me if I a mistake. You could use a Random Static BD Address, so you should change the USER_CFG_ADDRESS_MODE macro in user_config.h header file to APP_CFG_ADDR_STATIC.

Thanks, PM_Dialog

Dear Dialog Team,

我们有几乎相同的案例——公共BD地址我s received via UART right after power-on and needs to be set programmatically, overriding CFG_NVDS_TAG_BD_ADDRESS define.

Using the following does not work (public_address variable is 6-byte buffer with received Public BD Address):

/* In arch_system.c::system_init(), BD address is read from OTP location OTP_HDR_BDADDR_ADDR * using otp_hdr_get_bd_address() and copied to dev_bdaddr variable. If OTP was not programmed, * dev_bdaddr will either be blank_otp_bdaddr (DA14531) or co_null_bdaddr (DA1458x). Variable * dev_bdaddr is then only used in nvds.c::nvds_get_func when tag is NVDS_TAG_BD_ADDRESS. * * In nvds.c::nvds_get_func(tag=NVDS_TAG_BD_ADDRESS), value of dev_bdaddr is checked and if * not blank/null, its value will be returned. Otherwise the user configuration value * nvds_data_storage.bd_address will be used, which is assigned to CFG_NVDS_TAG_BD_ADDRESS * (defined in da1458x_config_advanced.h) statically. This function is called from ROM code. */ extern struct bd_addr dev_bdaddr; /*< arch_system.c */ /* User configuration value (NVDS_TAG_BD_ADDRESS) does not need to be updated, because: * 1. It can't be, because nvds_data_storage is static const in nvds.c * 2. It is not used if dev_bdaddr is not blank/null */ /* Update value which was read from OTP in arch_system.c::system_init() */ memcpy(dev_bdaddr.addr, public_address, sizeof(dev_bdaddr.addr)); /* This function is not implemented (returns NVDS_FAIL), but try anyway */ nvds_put(NVDS_TAG_BD_ADDRESS, NVDS_LEN_BD_ADDRESS, dev_bdaddr.addr); /* Actually set current BD address */ lld_util_set_bd_address(&dev_bdaddr, 0);

Despite the fact that when reading it afterwards

struct bd_addr resp_addr; /* Read back set address */ lld_util_get_bd_address(&resp_addr);

the new address is actually set (resp_addr.addr == public_address), but when advertising is started afterwards, DA14585 advertises with old address.

Bases onCYibin's comment, the above shall work, but I suspect that only if set in user_app_init(). How to change the address later on - anytime?

EDIT: For anyone wondering, I have just discovered the working way. For setting public address, the following

/* Actually set current BD address */ lld_util_set_bd_address(&dev_bdaddr, 0);

must be replaced with

/* Also apply this address right away via Link Layer Manager */ llm_util_set_public_addr(&dev_bdaddr); llm_util_apply_bd_addr(0); /*< 0 = Public address */

read-back stays the same

/* Read back set address directly from the Link Layer Driver */ lld_util_get_bd_address(&resp_addr);

Hi bojanpotocnik,

Thanks for your inputs and for your indication.

Thanks, PM_Dialog