Industry standard COM Express CPU module and dual XMC modules
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Interfacing the Serial / RS232 Port
The Serial Port is harder to interface than the Parallel Port. In most cases, any device you connect to the serial port will need the serial transmission converted back to parallel so that it can be used. This can be done using a UART. On the software side of things, there are many more registers that you have to attend to than on a Standard Parallel Port. (SPP)
preview: http://www.beyondlogic.org   |

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PIC Tutorial - Getting Started with RS-232
For this tutorial, we used the P18 development board equipped with the PIC 16F628 processor. The JFE text editor was used in conjunction with the incredibly powerful Cc5x compiler. Navigate: Intro - The code you'll need and how the RS232 IC works. UART - Setting up the PIC hardware for communication Debugging - Really good info for output formatting Receive - How to get the PIC to listen when your talking I2C - Simple interface to...
preview: http://www.sparkfun.com   |

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RS232 Timing
Wow. This turned into another huge tutorial. Get set! Using these debugging and tweaking techniques discussed in this tutorial, you should be able to implement a software UART of pretty much any rate. We have very successfully implemented 115200bps on the 16F819 because it has a higher 8MHz internal oscillator. With a 20MHz external crystal the timing becomes even easier! We will be demonstrating a difficult setup of 57600bps using the...
preview: http://www.sparkfun.com   |

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Serial Communication General Concepts
Serial is a very common protocol (not to be confused with Universal Serial Bus or USB) for device communication that comes standard on just about every PC. Most computers include two RS-232 based serial ports. Serial is also a common communication protocol that is used by many devices for instrumentation; numerous GPIB -compatible devices also come with an RS-232 port.
preview: http://pasture.ecn.purdue.edu   date: 12/3/2002 |

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Serial Communication via RS232 Port
RS232 is the most known serial port used in transmitting the data in communication and interface. Even though serial port is harder to program than the parallel port, this is the most effective method in which the data transmission requires less wires that yields to the less cost. The RS232 is the communication line which enables the data transmission by only using three wire links. The three links provides ‘transmit’, ‘receive’ and common...
preview: http://www.electrosofts.com   |

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Serial Programming:RS-232 Connections
Serial Data Communications: Introduction and OSI Network Model -- RS-232 Wiring and Connections -- Typical RS232-Hardware Configuration -- Programming the 8250 UART -- Serial Data Communications in DOS -- MAX232 Driver/Receiver Family -- TAPI communications in Windows -- Serial communications in Linux and Unix -- Serial communications using Java -- Hayes-compatible Modems and AT Commands -- Universal Serial Bus (USB) -- Forming Data Packets...
preview: http://en.wikibooks.org   |