Flash erase error

[Newbie]

Hello,

I am using sdk 12.2 and nrf52 dk.

I am storing some data in flash using ( sd_flash_write((uint32_t*)0x4F800,m_deadbeef, sizeof(m_deadbeef));) and I am able to read the data back but I am not able to erase flash data using 

sd_flash_page_erase(0x4F800);

How can I resolve this issue?

Thanks,

[Vidar Berg]

Hello,

When you erase you need to erase the full flash page. One flash page on the 52 is 0x1000 bytes. Thus, to erase the data at 0x4F800 you need to erase the flash page starting at 0x4F000. Also, the flash API takes page number as input, not the address (sd_flash_page_erase).  

Eg., sd_flash_page_erase(0x4F000 / NRF_FICR->CODEPAGESIZE)