How to read from flash?

[AndrewM]

In s210 there are functions sd_flash_page_erase, sd_flash_protect, and sd_flash_write. There is no sd_flash_read.

How do I read from flash? I can write to is using sd_flash_write, but how do I later read this data?

[John]

The S110 stack provides a pstorage API that uses the sd_flash functions. I took a look at the function used to get data out of flash and it is merely using a memcpy call to get the data out of the program space. I'd guess you can do the same with the S210 stack.

[John]

I can suggest a couple of things to try:

1. Check the error code from your call to sd_flash_write and make sure it is returning NRF_SUCCESS
2. Make sure the stack has returned a NRF_EVT_FLASH_OPERATION_SUCCESS before reading the memory.
3. If the S210 stack provides a pstorage API like the S110, use that as it hides all of the nit picky details for you.