问题
Like many people, I've had a Pi for a while but never really done anything with it. I've finally got round to hooking up an MPU6050 IMU to play around with. It uses i2c for communication so I followed the guide by Adafruit regarding enabling i2c shown here Adafruit i2c.
I then hooked up the MPU6050 to the i2c bus, and using i2cdetect -y 1 I was able to see a device at 0x68.
However, when trying to read or write from the device I got a permission denied error, so I followed this post to solve that problem /dev/i2c-x permission. It told me to modify /lib/udev/rules.d/60-i2c-tools.rules with
KERNEL=="i2c-0" , GROUP="i2c", MODE="0660"
KERNEL=="i2c-[1-9]*", GROUP="i2c", MODE="0666"
This worked, but then when actually trying to read or write using C++, I get "Input/output error". Similarly, using smbus in Python I get [Errno 5] Input/output error
When connected to an Arduino I can get this device to work perfectly.
I've exhausted every forum post I can find. Hopefully I've just done something stupid. Anyone got any ideas?
Original model B RPi running Raspbian, if that's of any help.
Cheers
来源：https://stackoverflow.com/questions/38815505/raspberry-pi-i2c-read-write-error