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How can one validate the data/contents read from memory[eeprom/flash] is correct or not?

What i have done is,
1.) read_mem(location, readBuf1,128)
2.) read_mem(location, readBuf2,128)
3.) if 0 == memcmp(readBuf1,readaBuf2,128), then VALID else INVALID

What are Pros and Cons of above steps?
Any another ways to do it?

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  • \$\begingroup\$ Is this an academic assignment? \$\endgroup\$ – Nick Alexeev Feb 6 '17 at 5:37
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If the contents ot the memory are corrupted, reading them twice won't help. The usual method to validate memory contents is using additional data like checksum or CRC

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If reliability is an issue, one can use a flash memory that has builtin checksums. 32 MB flash with ECC

Simple redundancy is NOT a good test; if a data bit were stuck high or low, it would pass that test. At least, invert the bits.

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