Beaglebone Black EEPROM memory address access....

Hi,

First of all check whether your EEPROM isn't write-protected.

Hi,
write-protect pin is connected as active-low.

Thank you,
Sakthi

Check the AT24C512 datasheet. This EEPROM requires 16-bit internal address even for byte writes.

Thank you for the reply. for 16-bit address also i am getting 0xff only. and i just followed the steps from the website "papermint-designs.com/.../331". with this procedure i can able to write in to the EEPROM. but it always over writing the EEPROM from the starting address. i cant able to write to particular address.
is there any other method for accessing EEPROM?


Best Regards,
Sakthi.

I have asked the SW team to help on this.

OK, i am expecting a favorable reply from you.
Thank you,


Best Regards
Sakthi

I usually get to a u-boot prompt and use the i2c commands

U-Boot# i2c probe
Valid chip addresses: 00 18 48 50 58 59 5A 5B

And then use i2c mw to program the EEPROM:

U-Boot# i2c mw 0x50 0.2 0xaa
U-Boot# i2c mw 0x50 1.2 0x55
U-Boot# i2c mw 0x50 2.2 0x33
U-Boot# i2c mw 0x50 3.2 0xee

So the .2 after each address means the address is 16-bits in length.

Steve K.

I am using AT24C512B for storing data. I wanted to store and retrieve data at particular location say 0x1243 and the value to write is 0x75. I don't want to write starting from the 0x0000 location. How should i proceed. Kindly advice with an example.
I am able write to a particular location using other Micro controllers.

Thank you
Sakthi

I am doing programming for Application level only. i can't go back to u-boot prompt. So i need to know how to write and read EEPROM at particular memory address from application level programming.

Thank you,

Sakthi.