UICR register CUSTOMER [0] Read / write

RE: UICR register CUSTOMER [0] Read / write

Turbo J — Thu, 05 Sep 2019 08:23:28 GMT

Trying to erase UICR while softdevice is running is a really bad idea. I strongly suspect an XY problem here.

RE: UICR register CUSTOMER [0] Read / write

yokokawa — Thu, 05 Sep 2019 05:13:13 GMT

Please tell me the range to be deleted in case of "nrf_nvmc_page_erase (0x10001080);"

I don't know the range of deleting one page.Also, please tell me how to erase a narrow area.

If "nrf_nvmc_page_erase ()" and "nrf_nvmc_write_words ()" are used while UART and BLE are operating, it will stop.

Please tell me what to do before executing "nrf_nvmc_page_erase ()" and "nrf_nvmc_write_words ()".

After execution, “sd_nvic_SystemReset ()” will be executed.
Thanking you in advance

RE: UICR register CUSTOMER [0] Read / write

Turbo J — Wed, 04 Sep 2019 08:56:17 GMT

Fstorage module cannot access UICR.

Your code never enables the softdevice. This means you can use the nrf_nvmc_xxx functions from nrf_nvmc.h directly. These do support writing to UICR.

Warning: Erasing UICR kills the bootloader, and thus may brick the device (read: SWD access needed to restore functionality).

RE: UICR register CUSTOMER [0] Read / write

yokokawa — Wed, 04 Sep 2019 04:42:47 GMT

Implemented flash ROM write / call method.
1) Even if the reading process is executed, data cannot be read, but no error will occur.
2) When the flash is initialized, 16 (address error) is returned.
3) Even if the write process is executed, data is not written, but no error occurs.
What are the mistakes in the program?devzone.nordicsemi.com/.../UICR_5F00_Debug_2800_20190904_2900_.zip

RE: UICR register CUSTOMER [0] Read / write

Turbo J — Thu, 29 Aug 2019 08:38:46 GMT

Reading and writing UICR uses the same method as with regular flash - that is either via NVMC (see PS) or via softdevice (as NVMC is restricted when softdevice is active).