How can I read bytes from flash?

RE: How can I read bytes from flash?

Susheel Nuguru — Wed, 03 Feb 2016 11:47:56 GMT

Thanks for coming back and updating this thread.

Rifat Mahmud — Wed, 03 Feb 2016 10:45:56 GMT

Yes, the flash is working on restart. Thanks. :)

Susheel Nuguru — Wed, 03 Feb 2016 10:38:27 GMT

I do not see why not!! The flash is initialized before the CPU starts executing code. So it should work, give it a try and let me know how it went.

Rifat Mahmud — Tue, 02 Feb 2016 12:20:28 GMT

But, since it's 'non volatile' memory, will this address be working even after complete hard reboot of the device?

Susheel Nuguru — Tue, 02 Feb 2016 07:30:40 GMT

You do not need NVMC hardware or API to read the flash memory. Just read it like any other memory.

for example, if you want to read 2 bytes of flash located at 0x21000 then the below code will do it

#define STORAGE_ADR   0x21000
uint16_t value = *(uint16_t *)ptr;

or If you want to compare it with some thing then better would be to do like below

  if(*((uint16_t *)STORAGE_ADR) == 0xff)
  {
    do something;
  }