Thanks for Reply Robert but the problem is when i use other IC PCF8574 I2C I/O Expander which have address 0x20, then i2c tools working very correctly, it cause problem only with CAT24C256 0x50, therefore i cant use EEPROM in my application :(, Need more help!
On Tuesday, December 9, 2014 10:58:21 PM UTC+5, RobertCNelson wrote: > > On Tue, Dec 9, 2014 at 1:27 AM, <[email protected] <javascript:>> > wrote: > > i am working on I2C-2 bus beaglebone black and interface an EEPROM of > > CAT24C256 which is located at 0x50 address. > > > > The problem is when i access this eeprom using i2c-tools etc i2cdump, > > i2cget, i2cset then the results are not correct most of the time. > > > > But when i use : > > root@beaglebone:~# echo 24c256 0x50 > > /sys/bus/i2c/devices/i2c-1/new_device > > and then: > > root@beaglebone:~# echo "This is a text to be stored in out EEPROM" > > > /sys/bus/i2c/devices/1-0050/eeprom. > > > > The above one work 100% correct and text is stored in the eeprom from > > address 0x0000, but the i2cset 1 0x50 0x00 0x41 is not doing anything > but > > dont show error. > > > > Kindly tell me that what is this strange problem? > > Well, once you did "echo 24c256 0x50 > > /sys/bus/i2c/devices/i2c-1/new_device" the kernel now has control and > the i2c tools won't work. > > If you do a i2cdump, that address should also have a "U" on it. > > Regards, > > > -- > Robert Nelson > http://www.rcn-ee.com/ > -- 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.
