Unable to make sd_flash_page_erase() work

[Babarskas]

Hello, i am trying to erase page from flash using sd_flash_page_erase(page_number); but it doesn't work. I find page number by doing my address (0x0002D000) to decimal (184320/1024)/4=45, sd_flash_page_erase(45); after ble_stack_init(); and it doesn't do the trick. I am using s110 8.0.0. nrf51422

[Babarskas]

Sorry for not replying sooner. It gives me FORBIDDEN OPERATION (error number 15). I forgot to mention I also give 50 ms delay after flash page erase command because I have read in a previous similar problem that It needs 21 ms to complete page erase and advertising could cause an error.

[Edvin]

Can you try to download nRF Connect for Desktop, open the "Programmer" app inside, select your DK from the "Select Device" drop-down, and click Read? Take a screenshot, and attach it, and also click "Save as file". I would like to compare those two, so if you can upload both that would be great.

Best regards,

Edvin

[Babarskas]

I found my mistake I didn't need to substract by 4. When I opened nRF connect it immediately showed me that one page is 1 KiB not 4KiB. sd_flash_page_erase(180); worked like a charm. Thank you for teaching me how to check flash memory.