Hi Does the EEPROM have factory default values? The reason I ask is that I've created a sketch where the user must go through a setup procedure. Those values are then stored in the EEPROM (using something like this Arduino Playground - EEPROMLoadAndSaveSettings ). On each restart of the sketch the …

Calculate the crc over your data in the eeprom and compare it with a crc stored in e.g the last four bytes. If they don't match, the settings are corrupt / not valid. Once the user has entered the data and it's saved in the eeprom, calculate the crc and store it in the last four bytes. There is a …

You can also use the CRC functions built into AVR-GCC: http://www.nongnu.org/avr-libc/user-manual/group__util__crc.html#ga95371c87f25b0a2497d9cba13190847f

EEPROM factory values?

Projects Programming

el_supremo October 28, 2017, 4:50pm 2

An EEPROM will always read as all ones if it hasn't been programmed or has been erased. i.e. each byte will read as 0xFF = 255 (decimal).

Pete

EEPROM put(), get() and read(), write()

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EEPROM factory values?

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