Your image does not seem to have attached properly, please edit it such that it can be viewed. I understand your application but have already asked for you to break down your CC430F5137 code to just the master implementation and describe whether you can get communication to work under this configuration with all devices connected. Make sure that the UCMM bit is set in UCBxCTL0 to support a multi-master environment. The low status of the SDA and SCL could also indicate that the CC3200 is controlling the bus and making it unavailable to the MSP430. In this case the USCI module will wait and check for the bus to become available. Also remember that the UCMST bit is automatically cleared and the module acts as slave if the CC430 master loses arbitration in a multi-master environment (UCMM = 1). Regards, Ryan
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