Hello Devzone,
How can the nRF5340 App core read the "version number" of the image flashed to the Network Core, e.g. the FW_INFO fields, or something similar?
I am using NCS 1.9.1.
I am able to manually dump and examine the Network core's binary file and see that I can indeed change the FW_INFO version number by adding CONFIG_FW_INFO_FIRMWARE_VERSION=1234 to my child_image/hci_rpmsg.conf file, but I am unsure as to how the App core can obtain that value at runtime.
When CONFIG_BT_DEBUG is set, the calls to bt_hci_cmd_send_sync(BT_HCI_OP_VS_READ_VERSION_INFO, NULL, &rsp) seem to return junk data, see below.
[00:00:00.642,761] <inf> bt_hci_core : HW Platform: Nordic Semiconductor (0x0002)[00:00:00.655,426] <inf> bt_hci_core : HW Variant: nRF53x (0x0003)[00:00:00.666,503] <inf> bt_hci_core : Firmware: Standard Bluetooth controller (0x00) Version 14.50663 Build 1008232294[00:00:00.684,448] <inf> bt_hci_core : Identity: FC:DB:21:36:D2:52 (random)[00:00:00.696,563] <inf> bt_hci_core : HCI: version 5.2 (0x0b) revision 0x22fe, manufacturer 0x0059[00:00:00.711,212] <inf> bt_hci_core : LMP: version 5.2 (0x0b) subver 0x22fe
I don't believe that these are valid values for: Version 14.50663 Build 1008232294.
I tried hacking where those values seem to be set here in vs_read_version_info() at https://github.com/nrfconnect/sdk-zephyr/blob/d6cd4fc1ceec4bb41c217709c373e5b9ffd05e51/subsys/bluetooth/controller/hci/hci.c#L4555 but the values did not change when I rebuilt and reflashed the network core. Are they controlled/set somewhere else?
I also saw this defined BT_VS_CMD_BIT_READ_BUILD_INFO, but didn't see anywhere that this command type/enum is handled. I attempted to make the HCI call with this command but it failed with: [00:00:00.665,740] <wrn> bt_hci_core : opcode 0xfc08 status 0x01
Is this command implemented?
How can I set some kind of version information in the Network Core image and then read that back at runtime from the Application Core?
Thank you for any guidance 
