This question relates to recommended procedures to write unique values to NVRAM during factory production.
We wish to store board-specific information such as Serial Number, BT Address, etc. in the NVRAM area of on-chip flash. Our preferred production flow is:
1. Load a simple 'Factory Test' Program (using ChipLoad) which performs the necessary PCBA-level test and Calibration Procedures
2. Write Device Serial Number, BT Address, certain calibration coefficients, etc. into NVRAM from within the 'Factory Test' program, using API's in: wiced_hal_nvram.h.
3. Load the final 'Production' Image to the chip (also using ChipLoad).
The issue is that the default ChipLoad utility will erase the entire NV memory space, so when the Final image is written to the device, the Serial Number, BT Address and Cal coefficient are lost. We are looking for a way to write the Final Image and retain the NVRAM settings.
Does Chipload support command-line options that will avoid erasing the user NVRAM section? Or are customized versions of the utility available?
Are there other tools / procedures that I may not be aware of, that would allow us to accomplish the same end-result?
I am aware of the 'HCI OTA' option ( https://community.infineon.com/t5/Bluetooth-SDK/CYW20819-NVRAM/m-p/94881 ) but the only utility I can find that performs that procedure is 'Client Control'. Does 'Client Control' have a CLI option? ... the GUI interface does not seem suited to a production environment.
