Hardware device version from NRF_FICR->INFO.VARIANT?

[Luke.L]

Hi,

     I tried looking over the docs but I could not find anything specific to my question, which bytes in the NRF_FICR->INFO.VARIANT contain the hardware version ID? e.g. flashed from

nrfutil pkg generate --hw-version 52 --application-version 1 --application nrf52832_xxaa.hex --sd-req 0x98 --key-file private.key app_dfu_package.zip


Thanks

[Einar Thorsrud]

Hi,

The HW version here is not intended to specify the chip version, but rather your hardware version (in case you for instance have different HW versions which are incompatible). The integer you provide to nrfutil with the --hw-version option must match the version set by the NRF_DFU_HW_VERSION define in the bootloaders sdk_config.h. This has no relationship with NRF_FICR->INFO.VARIANT. (It is possible to get the info from FICR via the DFU protocol though, using the NRF_DFU_OP_HARDWARE_VERSION operation).

[Luke.L]

Thanks for the reply, yes indeed I wish to specify the hardware version. So in my application, I wish to advertise the hardware ID, using this NRF_DFU_HW_VERSION  will be suffice right?

[Einar Thorsrud]

It depends. I am not sure what you mean by HW version in this follow up question. What we have discussed so far si the hardware version concept used by the bootloader for DFU. That define is used by the bootloader, but you could of course set it to a common number that you also include in your application and put in the BLE advertisement packet.