read through sysfs for eeprom at24

Nagarjuna Guttikonda

HI ,

i want to create the sysfs entries for the eeprom to read the data from the particular in the eeprom through the application .

for ex: cat /sys/eeprom/.. likewise ,can u suggest me the way how to write the code .as there is a generic driver for eeprom at24.c .with the generic driver how can we read the data from the eeprom

can u reply me ASAP

over 10 years ago

0 Titusrathinaraj Stalin over 10 years ago

TI__Guru** 116100 points

I think, you can try "eeprog" utility to read and write the EEPROM data.
www.codesink.org/eeprog.html
Please cross compile the source code.

dd if=dev/urandom bs=1K count=1 > 1k.dump

./eeprog -f -16 -i 212k.dump -w 0x00 -t 5 /dev/i2c-1 0x50

./eeprog -xf /dev/i2c-1 0x50 -16 -r 0x00:0xFF

./eeprog -f -16 -i 512.dump -w 0x00 -t 5 /dev/i2c-1 0x50

/eeprog -xf -f -16 -r 0x0:0x400 -t 1 /dev/i2c-1 0x50

0 Nagarjuna Guttikonda over 10 years ago in reply to Titusrathinaraj Stalin

Intellectual 460 points

can i read the eeprom data from the appplication with that eeprog,is it possible ,is there any way to create sysfs for read from the eeprom .

0 Titusrathinaraj Stalin over 10 years ago in reply to Nagarjuna Guttikonda

TI__Guru** 116100 points

By default, you can read and write the EEPROM data via SYSFS entry.

You can print the content of EEPROM like this. (using object dump command "od")
more /sys/bus/i2c/devices/0-0050/eeprom | od -x

Is it okay ?

0 Nagarjuna Guttikonda over 10 years ago in reply to Titusrathinaraj Stalin

Intellectual 460 points

I tried it with the command what you suggested,but the "connection Timed out " is coming ,how to overcome this .as there was default read and write for sysfs entries .how to read and write to the eeprom through sysfs entries ,can u give any syntax for read and write .
can u reply me ASAP . can i use the eeprog to read and write from the applicataion side

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read through sysfs for eeprom at24