How can I take the write protection off?, is it hardware or software this protection?
On Tuesday, September 24, 2013 2:26:37 PM UTC+2, kiran gopalan wrote: > > Hi, > > I am trying to write to the main eeprom ( at i2c address 0x50) using the > sysfs interface. > > I am able to read from this eeprom: > > ================= > root@am335x-evm:/sys/bus/i2c/devices/1-0050# head -c 300 eeprom | hexdump > -C > 00000000 aa 55 33 ee 41 33 33 35 42 4e 4c 54 30 41 35 41 > |.U3.A335BNLT0A5A| > 00000010 31 38 31 33 42 42 42 4b 32 30 35 39 ff ff ff ff > |1813BBBK2059....| > 00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > |................| > ================= > > But I am unable to write anything to this: > > ================= > root@am335x-evm:/sys/bus/i2c/devices/1-0050# echo "TEST" > eeprom > root@am335x-evm:/sys/bus/i2c/devices/1-0050# head -c 300 eeprom | hexdump > -C > 00000000 aa 55 33 ee 41 33 33 35 42 4e 4c 54 30 41 35 41 > |.U3.A335BNLT0A5A| > 00000010 31 38 31 33 42 42 42 4b 32 30 35 39 ff ff ff ff > |1813BBBK2059....| > 00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > |................| > * > 00000120 > root@am335x-evm:/sys/bus/i2c/devices/1-0050# > ================= > > I am not seeing any error messages in dmesg. > > AFAIK this EEPROM is write enabled and I am not required to do any extra > configuration. > > Can anyone help me to make this work? > > > Kiran > > > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
