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CCS/TMS320F28379D: UART pin problem

Part Number: TMS320F28379D


Tool/software: Code Composer Studio

I'm using GPIO-28 (Pin 78 on Docking Station) for UART TX.

In original example code, I changed 'scia_xmit(int a)' to 'scia_xmit(float a)' to transmit float number.

However, when I put 2.3 to RX and 2 comes out TX pin.

How can I use float for SCI communication?