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KL16 I2C does not generate repeated start condition (PE)

Question asked by Jacob Jennings on Feb 24, 2016
Latest reply on Feb 24, 2016 by Jacob Jennings

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On an MKL16 (128 flash version) I am seeing a missing repeat start bug when using the I2C_LDD Processor Expert component. I tried many clock path options including many that set the final I2C0 prescaler to 0 and 1, and the issue persists.


Screen Shot 2016-02-24 at 1.51.39 PM.png



This should be a write to the i2c address 0x68. Here's an example of what I expect (this was generated using a different device/master)



Edit: A blank project with only an I2C component seems to work fine. The issue must be with the use of I2C0 at the same time as some other component.

Edit: False alarm: a blank PE project with only an I2C component shows the same issue.

Edit: Tried operating at 3.3v instead of 1.8v, same result. I cannot find any working configuration for i2c.