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I2C Module not working on KL25Z

Question asked by Rocco Rondinella on Mar 25, 2016
Latest reply on Mar 28, 2016 by Rocco Rondinella


Hi I'm doing a processor expert project on the KL25Z freedom board and the I2C stopped working as soon as I added more components. I tried changing it back to it's previous state to revert the problem but it persisted. I'm out of the ideas as how to fix it.

What I'm trying to do is to communicate with an external sensor that works with I2C with the address 0x23, but when I look with a logic analyzer nothing shows up in both the SCL and SDA, in fact not even the lines are pulled up, they are both in low state. I know the logic analyzer wont send an ACK but at least I want to see if the I2C module is sending the Start bit and Address code.

I'm attaching the whole PE configuration for this component, if any other detail is required please let me know.

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