I am trying to get an Adafruit PCA9685 PWM/Servo Driver up and running with my TK1. I have validated that the board works with an Arduino, and is found at address 0x40 of whatever i2c bus it is on.
I have tried getting the device to work on a few buses - GEN1_I2C (on J3A1 21/23) and CAM_I2C (on J3A2 8/11) via a logic level converter (the Adafruit TXB0108), as well as GEN2_I2C (on J3A1 18/20). After wiring the device up, when I try to read the device via
sudo i2cdetect -yr 0
(or whatever number for the appropriate bus), the command returns – in the 0x40 address instead of 0x40 as it should.
The very strange thing is, when using the GEN1_I2C bus, I hooked up an oscilloscope to the SDA and SCL lines, and the lines seem to go haywire (for lack of a better term) after calling the i2cdetect command. Both lines fluctuate rapidly and seemingly randomly for the duration of the command, and do not always even return to 5V/1.8V (after/before the logic level conversion).
At this point I do not know what to do. I am worried that perhaps I damaged the pullup resistors used?
Hopefully someone will be able to help.