Calculate and save a checksum for data files

[Marzogh]

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Once a file system is setup on the Flash chip, the end of every file could possibly have a 16/32bit checksum to test the integrity of the file - without having to re-read the whole thing?

[boseji]

I would love to have this feature for specific blocks. Here is some links to a easy to implement CRC-32 from excamera (James Bowman)

Another solution can be to provide a generator function interface used by Hashing algorithms. For example I need to make checksum of the a particular Page:

// Somewhere in the code
fn_gen = call PreparePage(Sector, Page); // Get the function pointer
...
// Somewhere Inside the Hashing function
  sum += fn_gen();
...
  return hash_buffer; // Final hashed output
}

Hope that this can be part of the next release. I am currently testing the v3.0.0-work in progress branch for RTL8195A. Also there is some progress on the RTL8710, but need to merge that older versing to v3.0.0

Thanks again for the super useful code.

[Marzogh]

Hey mate, thanks for the information. I'm still learning my way around hashing and this will be helpful. 😄

On a different note, the latest stable pre-release code is always in the dev branch, the other branches keep changing (quite dramatically sometimes) as I test out new features. The next version that is due is v2.7.0 and it comes with Arduino Zero support and (hopefully) fully tested ATTiny support. 😃 The v3.0.0-w.i.p branch has a long way to go before it is stable.

[boseji]

Thanks for the direction would branch to v2.7.0