Hello,
can someone please help me with debugging an I2C problem?
I want to interface an mcp7941 RTC module. So at first, I need to get in contact with the module. I tried to find the address using "ic2detect -r 0" but no addresses are found to be existing...
Can someone give me some tips on how to get the I2C module working?
I use an Olinuxino Maxi which is jumpered for "Hardware I2C".
The problem was, that the RTC board, I use, has own SMD pullup resistors. I removed the pullups for SDA and SCL, which seems to have fixed my communication problems.
Next step will be to recompile the kernel with CONFIG_RTC_DRV_STMP=m to be able to blacklist the iMX233 builtin RTC and get my new RTC to be /dev/rtc0.