topic Re: I2C Slave Send not working as expected in Kinetis Design Studio

I2C Slave Send not working as expected

DavidLundquist — Tue, 24 Feb 2015 20:31:36 GMT

I've got a project with a KLZ05 and I'm trying to use the PE code manage the I2C interface. Device is configured in slave mode and I can send data to the micro without any problems. My difficulty is reading from KLZ05 in slave mode.

I get to a valid CI2C1_OnReadReq event which means the CPU saw the incoming address and the read read bit. In that event handler routine I call CI2C1_SendChar() provide the send data to the I2C interface in response to the read request. I never see any valid read data on the master side. What is interesting is that I do see the last byte written to the KLZ05 as my read data. I think this means that the host is just reading back the data register of the I2C controller.

Is there something i need to do to enable the PE code to feed the TX data to the I2C interface beyond calling the CI2C1_SendChar() routine? Some good examples would be a big help.

Thanks!

Dave

Re: I2C Slave Send not working as expected

DavidLundquist — Wed, 25 Feb 2015 16:23:02 GMT

Never mind. The PE code is doing exactly what it should. Android host is not.

Re: I2C Slave Send not working as expected

adriancano — Wed, 25 Feb 2015 16:30:49 GMT

Hi,

Have a look at the I2C_LDD component user guide, it might be helpful.

Hope this information can help you

Best Regards,
Adrian Sanchez Cano
Technical Support Engineer
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