Serial I/O (RS232) Using Delphi (RS232)

Delphi simple serial communication free download. YAT Engineering, testing and debugging of serial communication. Supports RS-232/422/423/485 as well as T. This page demonstrates how to perform Serial I/O via RS232 using Delphi). Last Modified 09-30-03, links fixed 10-24-09 All Intel PCs have one or two serial ports usually referred to as Com1 and Com2.

All Intel PCs have one or two serial ports usually referred to as Com1 and Com2. These comm ports provide voltages and pin outs consistent with RS-232C. Normally, these ports are used for mice, modems, printers, and the like.

Thousands of components, code samples, tools and useful content for developers are available here for you. Most of components are updated regularly so you can find here their latest version for using within Delphi 10.3 Rio as well. For the information, about 10-20 products are actualised every week. Using the Events in a serial port component TComPort (v4) from a thread in Delphi? Serial Port in Delphi 7 with ComPort do not send the data fully. List of third party tools and components for Delphi XE5. Delphi XE5 Tools and Components from Embarcadero Technology Partners. High performance lightweight serial communications library with. This is Just an update on this Delphi issue. I managed to make a working example (it works pretty good) on Delphi 7 using ComPort VLC component to control a series of LEDs thru Serial COMM Software example with source code, Arduino code and ComPort VLC, all available on my site to download. Arduino Tutorial Delphi 10.2 and Serial Port. Interface created with Delphi that you can control the serial port to Arduino turning on and off a Led, handle the LCD and receive messages towards the PC. The Delphi environment with the pascal language is still current and its use in Arduino is growing more and more. Delphi source code.

virtual dj sample music download Under DOS, it was possible to directly access these ports. However, Windows 95 and above forbid direct hardware access. Therefore, this page exists to help get around windows.

Generic References Basic Commands Writing a Port Reading a Port TCommPort Additional References

Generic References

I provide numerous references in Serial I/O (RS232).

Basic Commands

I really don't get it, with all the available windows API commands, why doesn't Delphi provide a built-in wrapper function for SerialIO?

Easeus partition master 10.8 serial key download. Borland provides the following Delphi FAQ's (delphi-faq.zip 915K).

• 16193: Setting comm port configuration programmatically under Win95
• 16199: Changing com port config via Win95 CommConfig Dialog
  (Pure gold :) . except that only the baud rate can be changed :( the other 4 fields are ignored.
• 16400: How can I dial out through the modem under Win32?
  How to write to the comm port
• 16774: How can I determine the names of the installed comm ports?
  The data is read from the registry

In addition to the Delphi File I/O commands, there are several Windows API commands. Most of these comm commands (such as CommConfigDialog) are defined in kernel32.

Writing a Port

The following code from FAQ 16400 shows how to write to the comm port as a file. The code in the FAQ also verifies a valid handle before writing to it. Warning: There is an error in the FAQ - NumberWritten must be dword not LongInt

This code works for comports 1 thru 9, but not for ports 10 and higher. Instead, use code similar to the following

Reading a Port

Well, reading the port is almost trivial . if you know the trick.

You must configure the TimeOutBuffer. I don't know what good values should be, so I used 300.

Having done that, ReadFile

Delphi Xe Serial Port Component Speakers Car Audio

waits until I scan a barcode. Eventually, I will use ReadFileEx because it will call a routine when a barcode is scanned.

Once the port is open and configured, here are 2 routines that will read the port. For test purposes, each was connected to its own button. Uh, both routines work when run from the IDE . the second refuses to work if you double click on the exe file. I have no idea why.

This next routine works from the IDE, but not if you run the app by double clicking the exe file.

When CreateFile, ReadFile, and WriteFile are used, Delphi does not use MSComm. Instead, it uses the following Kernel32 commands (found using Depends.exe)

If you try to search the Delphi 5 help for ReadFile, there are no hits. This is because ReadFile is a Windows API command . not a Delphi command. Instead, click on it in your code and press F1.

Here is a reference that helped me develop this section.

TCommPort

On the Internet, there are several TCommPort type components (see the references below or just search for them).

I have been successful using TCommPort by Dirk Claessens (freeware with full source code).

I strongly suggest using someone else's component rather than trying to build one yourself. Why? Because they have already been tested on numerous systems and various undocumented 'features' have been taken into account.

Additional References

There are numerous communications routines available at Torry's Delphi Pages, including

• TSerial (shareware) is frequently mentioned in the Delphi newsgroups
• Delphi I/O Port Programming under NT v2.0 which includes a driver for manipulating the kernel I/O permissions map
• Simple I/O for Windows 95/98 only. Assembler code fails in NT.

Dirk's Delphi Pages - lots of freeware with source code - including TCommPort. Author: Robert Clemenzi - clemenzi@cpcug.org

URL: http:// cpcug.org / user / clemenzi / technical / Languages / Delphi / Delphi_SerialIO.htm

Windows Standard Serial Communication Library for Delphi

The Windows Standard Serial Communications Library for Delphi (WSC4D) is an serial communication library based on the WindowsAPI. Includes 52 functions plus modem control, serial comm API. WSC4D uses the core Windows API to communicate with any device connectedto a serial port from within a Delphi application.

A simple interface allows accessing data from a serial port using RS232 or multi-drop RS422 / RS485 serial ports. WSC also supports virtual ports such as those created by Bluetooth and USB/serial converters. WSC4D provides the capability to quickly write 32 bit and 64 bit Delphi applications to control serial devices such as barcode scanners, modems, lab instruments, medical devices, USB serial devices, scales, GPS navigation, etc.

The Delphi component library includes 49 functions plus serial line status & control, modem control,ASCII/XMODEM/YMODEM protocols, and a good selection of Delphi exampleprograms.

Delphi Serial Port Component

WSC4D can be used with any version of Borland/Codegear/Embarcadero Delphi (including Embarcadero XE8 and Delphi 10 Seattle/Berlin).

Features of WSC4D include:

• Includes 64-bit (WSC64.DLL) and 32-bit (WSC32.DLL) versions.
• Free technical support and updates for one year.
• Royalty free distribution with your compiled application.
• Evaluation versions are fully functional. No unlock code is required.
• Includes 52 functions plus modem control.
• Can control any serial device (scale, barcode reader, etc.) connected to a serial port.
• Can be used from GUI mode or console mode programs.
• Can control multiple ports simultaneously.
• Can be used with virtual serial ports using Bluetooth serial or a USB to serial converter.
• Supports RS232, and multidrop RS422, and RS485 ports.
• Includes hardware and software flow control.
• Supports character peek (SioEventChar).
• Supports transmit and receive timeouts.
• Can send Windows messages on completion of events (incoming character, etc.)
• Supports any baud rate (32-bit and 64-bit versions).
• Ability to specify the parity, word size, and number of stop bits.
• Comes with ANSI emulation and ASCII, XMODEM and YMODEM.
• Supports binary and text data transfer.
• Is port re-entrant.
• State driven Xmodem and Ymodem on multiple ports simultaneously.
• Is fully thread safe.
• Supports Windows XP through Windows 10.
• Works with all 32-bit versions of Borland, Codegear and Embarcadero Delphi.
• Works with 32- bit and 64-bit verisons of Embarcadero Delta XE through Delphi XE8, and Delphi 10 Seattle and Berlin.
• Does not depend on support libraries. Makes calls to core Windows API functions only.
• Can be used with any program in any language (C/C++,.NET, Delphi, VB, VB.NET, Foxpro, etc.) that can call the Windows API.
• License covers all programming languages. Purchase a developer license for WSC4D and use the DLLs with any other development environment (C++, Visual FoxPro, etc).
• Implemented as a standard Windows DLL, which will work with all versions of Windows.
• Will run on machines with or without .NET installed
• Can be purchased with or without ANSI C source code to the WSC DLLs.
• Documentation online as well as in printable format.

WSC4D can be used in the development of Win32 and Win64Delphi applications running under Windows XP through Windows 10.The evaluation version of WSC4D is fully functional.

The current version of the Windows Std Serial Comm Lib for Delphi is 7.0 (October 3, 2019).Registration is $119 for email delivery ($199 with C language source code).

Order

Order Page

Links

HOME
Download WSC4D
WSC4D Programmer's Manual
WSC User's Manual
WSC Reference Manual