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Why do I have an Issue when switching from a UART to SPI on the same port?

Latest Updated:10/13/2016

Question:

Why do I have an issue when switching a port from UART to SPI with SSP 1.0.0?

Answer:

The SPI open call does not clear the registers to their default values so the values when used as a UART will persist. The work around is to clear the SMR and SMR_SMCI registers prior to using the SPI port. This issue should be fixed in the next release of SSP.