Internal Flash Write & Read

RE: Internal Flash Write & Read

tesc — Thu, 25 Feb 2021 10:15:56 GMT

Hi,

It is impossible to tell what is going on without more information. Please answer the following questions:

[quote user="tesc"]

What SDK (and version) are you using?

What libraries/modules/APIs are you using for doing the flash writing and reading?

Can you share the code doing the flash writing and reading?

[/quote]

Regards,
Terje

RE: Internal Flash Write & Read

Mr.NCK — Wed, 24 Feb 2021 10:58:53 GMT

HI in that image first line is written. but while reading it shows that value

RE: Internal Flash Write & Read

tesc — Wed, 24 Feb 2021 10:08:24 GMT

Hi,

What SDK (and version) are you using?

What libraries/modules/APIs are you using for doing the flash writing and reading?

Can you share the code doing the flash writing and reading?

Please note that flash operations take some time, and require program execution to be halted while it happens. Because of this, the flash API is typically asynchronous. There is one function to queue a write or erase, and then you get a callback when the operation has been successfully performed. If you read back before you get this callback, then the flash has not yet been written.

Letter ÿ typically corresponds to 0xFF in extended ASCII encoding, and so what you read back is most likely a flash area filled with 0xFF, which is the state of flash when erased (not yet written to). So most likely you are reading before the write has been performed.

Regards,
Terje