I2C Clock Stretching feature in Raspberry Pi 3

Question

Hi all,

I have a sensor that uses the I2C clock stretching feature, but the Raspberry Pi 2 versions do not included this feature. I have to run the I2C clock at the slowest speed to communicate with minimum errors. Does the Raspberry Pi 3 offer this clock stretching feature?

Thanks,

Don

gps-pie · Answer

Ignore what it says on the Adafruit website about using only serial connection to the Raspberry Pi. This is incorrect. The Raspberry Pi i2c hardware does have a bug which prevents the BNO055 IMU operating correctly. However this can easily be overcome by disabling the standard i2c hardware entirely, replacing it with a software based i2c device already present in the kernel by using a device tree overlay. This software based i2c device correctly implements the i2c protocol clock stretching. This will allow the BNO055 to be used with the Raspberry Pi. For full details of the procedure please see https://gps-pie.com/pi_i2c_config.htm

I2C Clock Stretching feature in Raspberry Pi 3

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