1 Reply Latest reply on Oct 4, 2015 12:33 AM by gary.xu

    Strange problem with FX3 I2C

    gary.xu

      When I measure the I2C signals with oscilloscope, I get a strange I2C signal timing sequence (attachment picture is the oscilloscope's waveform). The oscilloscope tell me the I2C master is addressing with 0x30 slave address, and following an ack. The starting sequence is also very strange. This waveform appears several seconds periodically. I can not measure my real waveform and debug the I2C interface timing sequence. I can make sure that my firmware is not controlling the I2C controller, and there is no I2C slave device's slave address is 0x30, and FX3 is the only I2C controller on my board.

         

      Can anybody tell me why this occurring? Thank you very much!