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issue using UART0 and I2C0

Question asked by Gaston Schelotto on Jun 17, 2015
Latest reply on Mar 12, 2018 by Gaston Schelotto



I've configured with KDS 3.0 my FRDM-MKE02Z as shown



If I use I2C0 (master) and UART0 separately in my application everything goes well. I'm able to Rx/Tx information through both modules. However, while I access to my I2C slave (an MCP23017 I/O Expander) and I receive some information on UART0 Rx (by a modbus polling), the CI2C1_SendBlock function returns an ERR_BUSY error. And the MCP cannot recover anymore.


UART0 share pins with I2C0 but PE has not notify of any errors so I assume that pinmux are set correctly. What could be the problem?

I'd appreciate any help.