EEprom faliur

[daynial]

Posted on January 11, 2017 at 06:22

I have write a string on multiple address of eeprom but when i read it later it show FF on some places between the data but sometime it reads every thing fine. I am using this library 

http://www.electroons.com/blog/hello-world/

 #clive1

[S.Ma]

Posted on January 11, 2017 at 06:43

Writing to eeprom depends on its page size. Multiple byte write must be done within the same page. If your eeprom is 1kbyte with 16 byte pages,  writing 4 bytes from 0x008 to 0x00B will work, while 0x00E to 0x011 won't and 2 bytes will probably be corrupted. Also, during progranming, the eeprom won't respond to i2c messages, some of them could be scrapped.