Example code to store a 9 digits serial number in UICR

[Learner]

Hello,

I would like to use the UICR customer registers to store our devices serial numbers. 

Can you please point me to some example code for nRF52833 SoC.

I am using nRF Connect SDK v1.7.0.

Thank you for your help.

Kind regards

Mohamed

[haakonsh]

#include <zephyr.h>
#include <nrfx_nvmc.h>

void main(void)
{
	nrfx_nvmc_word_write(&NRF_UICR->CUSTOMER[0], 0x00);
	
	return;
}

I believe this code snippet should write 0x00 to the first customer register in UICR. 

BTW, you can use the BLE address in DEVICEID[n] as a serial number for your devices, they are unique 64bit addresses. That way you can easily find the serial number of the device OTA. 

[Learner]

Thank you Haakonsh.

I am using NVS to access the SoC internal flash. Is there an equivalent NVS function I can use?

Thank you for the tip regarding using the BLE address as a serial number.

Kind regards

Mohamed

[haakonsh]

I don't think you can access UICR through the file system. 

[Learner]

Thank you Haakonsh.

I currently include the following header files

#include <zephyr.h>
#include <power/reboot.h>
#include <device.h>
#include <string.h>
#include <drivers/flash.h>
#include <storage/flash_map.h>
#include <fs/nvs.h>

Will the above suck  in the files I need to write to and read from UICR?

Or do I need to add this #include <nrfx_nvmc.h> as well?

Kind regards

Mohamed

[haakonsh]

I believe you will need the nvmc headers as well.