UART Server

A simple program that serves a serial port over TCP to multiple clients. The first connected client (in a FIFO fashion) can also send data to the serial port.

Dependencies

Windows, or a POSIX-compliant system with a functional poll(2) implementation.

Building

Just build and link main.c and serial.c using your favourite compiler. For GCC on a Linux system the following command will do:

$ gcc *.c -o uart-server

On Windows you'll need to add -lws2_32 to the command line:

$ gcc *.c -o uart-server -lws2_32

MSVC will link Winsock2 automatically using an embedded #pragma comment directive, so the following command line will be enough (assuming the proper environment has been set up):

> cl *.c /Feuart-server

Usage

$ ./uart-server serial_port config_str [tcp_port]

Arguments

• Serial Port -- The name of the serial port to use (e.g. COM1 on Windows, or /dev/ttyS0 on *nix).

• Serial Port Configuration -- A string specifying how to configure the serial port. The format of the serial port configuration string is baudrate[,parity[,data-bits[,stop-bits]]].

  • baudrate - The baud rate to use, e.g. 115200 (required)
  • parity - N for none, O for odd, E for even, M for mark, S for space (optional, default is N)
  • data-bits - 5, 6, 7, or 8 (optional, default is 8)
  • stop-bits - 1, 1.5, or 2 (optional, default is 1)

  Optional parameters can be omitted entirely if they're at the end, or left empty if you want to use the default and specify a parameter after them. For example, to configure a baud rate of 19200 with 7 data bits you can simply pass 19200,,7 as the configuration string.

• TCP Port -- The TCP to accept connections on (optional, the default is 8278).

License

This program is licensed under the MIT license. See LICENSE for details.