Can I modify ucir in my application?

RE: Can I modify ucir in my application?

Jørgen Holmefjord — Thu, 27 Jul 2017 08:25:06 GMT

Your code is correct, I have tested it and get correct reading. Note that UICR registers are located in flash, and it can take up to 338 us to write one word. Try adding a short delay before reading back the value, to make sure it have enough time to be written to flash.

RE: Can I modify ucir in my application?

frank zhang — Thu, 27 Jul 2017 02:07:55 GMT

Hi Endnode, Thanks for your feedback I have tried the code below: #define UICR_CUSTOM_ADDRESS 0x10001080

		*((uint32_t *)UICR_CUSTOM_ADDRESS) = 0x12345678;

		printf("UICR:%8x ",(*(uint32_t *)UICR_CUSTOM_ADDRESS));

But I still get "UICR:ffffffff". Can you tell me what is the right way to modify UICR->CUSTOMER ? Thanks Frank

RE: Can I modify ucir in my application?

endnode — Wed, 26 Jul 2017 08:01:57 GMT

Yes you can, simply write to UICR->xxx address (must be 32-bit aligned and better not overwrite some significant registers;)