I see you posted this exact same question to multiple forums. (nxp related)..
You "should" include what processor and what version of u-boot you are using, otherwise you will NOT get any good answers.. (ps, it's not BeagleBoard related, as we don't deal with the designware_i2c driver in our products) Regards, On Thu, Mar 23, 2017 at 3:52 AM, Ayman Bahouth <[email protected]> wrote: > Hi, > > > I have PCA9558 connected to I2C bus (i2c0, designware_i2c driver, 100KHz). > I'm trying to write to it's EEPROM using i2c commands through U-Boot > Terminal without any success. > > The PCA9558 is the only device connected to i2c0, but when I 'i2c probe' > command I get a message says "Valid chip addresses: " with empty list (the > device address is 0x4E). > > Dumping the EEPROM memory using the command "i2c md 0x4e 0x0300.2 100" > prints out a list of "00". > > Trying to write to the EEPROM using "i2c mw 0x4e 0x0100.2 0xCCBB 2" then > dumping the memory again give me the same result, a series of "00". > > I checked the clock and the data signals using a scope, and both seems to be > fine. I can see the start condition, slave address, the command, the > acknowledgements and the data at pins 0 and 1 are synchronized. The WP have > a constant 0V. I tried everything in more than one PCB, all with the same > behavior. > > One more thing, I have an EEPROM connected to i2c1. Probing i2c1 returns the > EEPROM address, and I can read/write to the EEPROM, so the driver is good. > > > > Any advice when I can't write to the PCA9558 EEPROM? Why I can't see it's > address when I probe the i2c? Am I using the correct commands to read/write > to the EEPROM? > > > > Appreciate your help, > > AymanB. > > -- > 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]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/ef54ee4b-37d0-4ea7-8b99-352498d57492%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- Robert Nelson https://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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYieyhiRQYiXQYVQ%3De089P05PNzaoE%3DvxkPbmJTFwR6BVA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
