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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

Hi,

 

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

Untitled.png

 

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.

 

regards,

gaston

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