zhuminfeng / serial-port-programming-on-linux

Programming the Serial port on Linux in C using termios API

Programming the Serial port on a Linux System using C and termios API

-------------------------------------------------------------------------------------------------------------------------------------- Code for programming the serial port on a Linux System using **ANSI C** and **Terminos API**. The codes can be used for transmitting and receiving data from an x86 Linux PC and a Microcontroller deevelopment board through 3 wire Serial Link or RS232 Port.

###You can find the original Tutorial here

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##Features

• PC side is written in ANSI C using Terminos API to Communicate with the Serial Port.
• Transmission and Reception are kept seperate in different C files so that user can easily understand the mechanisms involved.
• PC communicates with MSP430 microcontroller using a 3 wire serial Link (RX,TX,GND).Refer Tutorial for Circuit
• The Microcontroller and PC are connected in null modem configuration using 3 signals (TX,RX and Ground).
• Code will Work With Standard RS232 Serial ports or any USB to Serial Converter.
• Microcontroller side code is written in Embedded C and can be Compiled using Code Composer Studio for MSP430.
• The Hardware used is MSP430G2553 on Launch pad development board.

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##Code Explanation

• serial.c - A simple C file which opens a connection to Linux Serial Port and closes it.

• USB2SERIAL_Read - Serial Reception Program which runs on the Linux PC and receives data from the MSP430 Microcontroller.The Received Data is then displayed on Console Window.

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• USB2SERIAL_Write - Serial Transmission which runs on the Linux PC and Transmits a charcter to the MSP430 Microcontroller.The MSP430 on Receiving the Character lights up an LED on the Launchpad Development board.

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##Circuit

• Available in the original Tutorial

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##Hardware used

• - **USB to RS485/RS232/Serial Converter** - Details can be found here
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• MSP430 Launchpad Development Board

• A short tutorial can be found here