Simple Serial Protocol

  

In computing, a communication protocol refers to the set of rules that computers use to communicate with each other. The protocol defines the signals that the computers will give each other, and other details such as how communication begins and/or ends.

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This is a proposal for a C class to handle simple serial communications, which means send and receive some bytes, and control the state of serial communication signals. In many cases, what one needs is to be able to communicate by a serial port to certain devices or electronic circuits.

  • Simple serial point-to-point communication protocol -— sample code. A simple implementation of serial communication between two software entities (Uart / I2C / etc.) 3. Arguments for stateless protocols (context: simple point-to-point communication).
  • Simple Arduino Serial Communication This Tutorial is progressive and will be updated from time to time. The goal is to start from a very basic form of Arduino Serial communication, and progressively add or improve components so that we can ultimately transmit data from one computer to another using an XBee.
  • Apr 23, 2018  In this post, we present a robust serial communication protocol to interface an Arduino with a computer (e.g. A Raspberry Pi). This protocol was designed to be simple, flexible and easy to use.
Types of Protocol
  • Hypertext Transfer Protocol (HTTP), is used for accessing and receiving Hypertext Markup Language (HTML) files on the internet.
  • Simple Mail Transfer Protocol (SMTP), is used for transferring e-mail between computers.
    • Post Office Protocol version 3 (PoP3) is the most common account type for personal e‑mail. Messages are typically deleted from the server when you check your e‑mail.
    • Internet Message Access Protocol (IMAP) is a protocol for e-mail retrieval and storage developed in 1986 at Stanford University as an alternative to POP.
  • File Transfer Protocol (FTP), is used for showing files to be copied between devices.
  • Transmission Control Protocol (TCP), ensures the delivery of information packets across networks.
  • Internet Protocol (IP), is responsible for logical addressing called 'IP address' to route information between networks.
  • In computer networking, Point-to-Point Protocol (PPP) is a data link (layer 2) protocol used to establish a direct connection between two nodes.
  • The packets and device protocol(TPADP) makes sure that the other protocols have a back up route.

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Serial

Simple Serial Protocol Download

24 Jun 2003
A C++ class to allow simple serial communication in Win32 platforms

Introduction

This is a proposal for a C++ class to handle simple serial communications, which means send and receive some bytes, and control the state of serial communication signals. In many cases, what one needs is to be able to communicate by a serial port to certain devices or electronic circuits. As simplicity is the main goal in this class, it is developed for synchronous read and write operation instead of overlapped ones and also assuming that there is no hardware (or software) flow control so the communications signals can be freely controlled. If you need an event driven serial communication (overlapped read/write, signals changes controlled by even, etc.) you can look in this site for the article Serial communication for Win32 with modem support By thierrydollar

Using the code

To use the class CSerialPort you must call CSerialPort::Open then does read or write operation, set or test the state of communications signals and closes the port once finished (not mandatory because the destructor does it). The read and write methods make no assumption about type and format of data send or received, you must take into account if you are handling a character or binary format, if there is Unicode, mbcs, etc. The open function if defined as follows:

There is no assumption about communication parameters because they are specific to each serial communication and must be known in order to establish a successful communication. Even, if the most frequent name of serial ports are “COM1:” to “COM4:”, there can be more than 4 serial ports in a machine and the serial driver is not forced to follow the “COMxx” name convention so a serial port can have any name in Win32 platforms. It would be a good idea to have a static function to obtain the names of installed serial ports but, as far as I know, there is not a documented way to do that. There is a simple way to know about installed ports: assuming that ports names follow the “COMxx:” convention they try to open all possible ports and if there is an error and GetLastError() returns ERROR_FILE_NOT_FOUND then the port isn’t installed. There is another way to know installed ports names and it is searching in registry but it is undocumented and platform depend.

Simple Serial Protocol Free

With article there is a simple sample of using the mentioned class, the example is a program that reads bar codes from a serial bar code reader. Normally bar code readers send the read bar code ended by carriage return and line feed characters (this can be configured and even could be different for specific manufacturer) and the code is an ASCII string. There is a class (CBarCodeReader ) derived from CSerialPort that encapsulate the described protocol and its read method returns the read bar code (if any) directly in an string. There is not much more to say, the rest is in the code and it is simple (at least should be :-) )

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Remarks

Remember that this is a simple instead of complete way of using serial devices. The proposed code can be used in Win32 Platforms and Windows CE versions. Pocket PC developers (I didn’t try others Windows CE versions) must take into account that manufacturers can have specific implementations of serial APIs (as other APIs). Even if it is true that such implementations must agree to Pocket PC implementation, I have found small differences from one device to another. For instance: in a Dell Axim Pocket PC device the signal CD must be externally supplied (the voltage present) in order to read or do any operation with serial port, there is no function errors if you try without that signal on, but you won’t obtain any result. I have tried the same in Compaq iPAQs and it is possible to read without any specific external signal on (as should be).

Rs232 Serial Protocol