how to set USB serialnumber as the ble mac address

RE: how to set USB serialnumber as the ble mac address

Liangshaun — Wed, 22 Dec 2021 00:31:43 GMT

ok, thanks very much.

RE: how to set USB serialnumber as the ble mac address

Øivind — Tue, 21 Dec 2021 10:44:02 GMT

That sounds like a perfectly viable way to handle it. I asked a colleague as well, and neither of us can immediately see any issue with your approach.

RE: how to set USB serialnumber as the ble mac address

Liangshaun — Tue, 21 Dec 2021 03:55:09 GMT

Hi,

thanks for your reply. I have try it, but the bt_hci_cmd_send_sync() command can't work.

I guess that because the z_impl_hwinfo_get_device_id() function is called in the usb_device_init() which running in the system init

SYS_INIT(usb_device_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);

and the bt_hci_cmd_send_sync() maybe work after bt_enable().

I've used a not good way to solve this problem,

that is using flash to store the special information after bt_enable() and reset the MCU. then z_impl_hwinfo_get_device_id() can read the information from the special flash page.

maybe, is there a better way?

RE: how to set USB serialnumber as the ble mac address

Øivind — Mon, 20 Dec 2021 15:26:03 GMT

Hi,

I apologize for the late response.

You can get the DEVICEADDR on the application core by including hci_vs.h:

#include <bluetooth/hci_vs.h>

Then use a hci command to read the static addresses:

struct net_buf * rsp;
err = bt_hci_cmd_send_sync(BT_HCI_OP_VS_READ_STATIC_ADDRS, NULL, &rsp);
if (err) {
	printk("Failed to read DEVICEADDR Err: %d\n", err);
}

Let me know if you have any issues.