This directory contains the port of libModBus to both the Oasis5 5-port Expander Board,
and the Oasis5 6-port Daughter Board.  Each port takes 3 of the 4 source files.

portevent.c - Standard (no OS) port of libModBus event system.
              Used in both the Expander Board and Daughter Board.

porttimer.c - Uses PIC Timer1 for libModBus message timer.
              Used in both the Expander Board and Daughter Board.

portserial.c - Uses PIC UART6 for ModBus traffic.
              Used in Expander Board, as well as debug version of the Daughter Board.

portspi.c - Uses PIC SPI1 Bus for ModBus traffic.
            Used in standard (non-debug) version of the Daughter Board.

