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dcb, i don't mean a software uart. I mean the Uart handlers. Generally for any mpu you're working with, someone (private or from the mfg) has produced a Uart.c that contains hardwware init code (pass it your baud rate and settings, it sets up the registers), interrupt handlers, efficient buffers, etc. The hardware layer is covered, the uart.c would handle the transmission of characters and then an application layer would observe the incoming characters, compare them to the protocol and call the appropriate functions as well as take outgoing message commands and package them up in the protocol and send them to the uart.c for transmission.
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