Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small printer symbol. This port is known as LPT port or printer port. We can program this port for device control and/or data transfer, in projects of robotics, electronics and even LCD interfacing. In this article, I'll show the basics of parallel port and some programming principles using the LPTPort Component. Parallel Port Concepts The parallel port was initially designed to connect a printer to the computer, however we can program this port for many more applications beyond that. The parallel port can be used for two main reasons: device control and communication. We can program the parallel port for both functions.
The parallel ports are easier to program and faster compared to serial ports. However the main disadvantage is that it needs more transmission lines (9 in comparison to the 3 lines used in serial port). Because of this, parallel ports are not used in long distance communications. So let's see the basic differences between the transmission of parallel port and serial port ( Figure 1). In serial ports, we have two data pins: one for transmission and the other for reception. To send data in serial port, it has to be sent one bit after another with some extra bits like start bit, stop bit and parity bit to detect errors.
But in parallel port, all the 8 bits of a byte will be sent to the port at the same time and an indication that the data is ready for transmission will be sent in another pin. There will be some data pins, some control and some handshaking pins in parallel port. Commonly at the computer's backside we have a DB25 female connector with 25 pins (see Figure 2), the Table 1 presents the respective DB25 pins and functions. Parallel's Port Organization Now we are going to see how the parallel port is organized, there are 3 registers associated with the LPT port: the data, status and control registers. The data register takes care of the port's data pins, this means that if want to send a byte to the data pins, we need to address this register, in order to send the byte to the data pins. Normally, the data, status and control registers will have the following addresses (see Table 2), we will need them during the programming. To know the details of parallel ports available in your computer, follow this procedure: 1.
Right click on My Computer, go to 'Properties'. Select the tab Hardware, click Device manager. You will get a tree structure of devices; in that expand 'Ports (COM & LPT)'. Double click on the ECP Printer Port (LPT1) or any other LPT port if available (see Figure 3).
You will get details of LPT port. Make sure that 'Use this Port (enable)' is selected. Select tab Resources. In that you will get the address range of port (see Figure 4).
Akses Port Serial Dengan Delphi Online
Programming the Parallel Port For security reasons NT/2000 and XP versions of Windows don't allow direct access to hardware, in other words, one cannot direct manipulate the hardware resources, like parallel ports, therefore a device driver is necessary to talk to the system's core (kernel) to get access to computer's physical ports. In the 95/Me and 98 Windows versions there is no restriction and the we have direct access, so there's no need for drivers. Among the difficulties in using dlls, is the fact that you must distribute them with your application, in order for it to work, but we will use a free superb component, that will do all the work, of loading its internal drivers to enable us with direct access to computer's parallel ports. We are going to make a simple application to demonstrate the many uses and advantages of the LPTPort component: LPT port detection, data pin manipulation, writing values to and reading values from the parallel port. You can download the LPTPort component at:.
Initially open the BDS and create a new application, save it as ParallelControl.dpr, and the main form as uMain.pas. Put on the created form one XPManifest and a LPTPort component, now double click the form and on the event OnFormCreate, type the following code: LPTPort1.SelectPort($378); Select all With this code we will be selecting the base parallel port address ($378) that is the standard in most computers (888 in decimal notation), we need to use the $ in order for the compiler to recognize that's a hexadecimal value. Pick a GroupBox, and alter its Name property to grbPins, add 5 labels onto the GroupBox and modify its properties like described in Table 3.
These Labels will be used to show the decimal and binary values from the port's data register using the GetState method (see Listing 1). Listing 1: Code for presenting the decimal and binary values from data register procedure TfrmMain.GetState; begin lblDec.Caption:= IntToStr(LPTPort1.Inp); lblBin.Caption:= DecToBin(LPTPort1.Inp); end; Select all This routine reads the data register using the Inp function and presents the value using the labels Caption property value. Observe that the LPTPort component has a method for converting decimal into binary values with DecToBin.
Now insert a RadioGroup on the form with its Name property altered to rdgRegisters, and in its Items property type these three lines: Data Register, Status Register and Control Register. This way, we are inserting three RadioButtons corresponding to these three lines. Now double click the rdgRegisters and type Listing 2 code.
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Akses Port Serial Dengan Delphi Indiana
I think what you have to remember is that USB devices are mostly 'seen' by Windows so to read from a RAM Stick you just need to access it as you would any other 'drive'. If you are talking about general serial comms, then Com port driver components will not 'see' a usb port because its not a comms port. The 2 easy ways round this are. A Windows driver that links to the USB bus and Widows then sees it as a serial port. E.g as provided by DLP design.
Your Delphi Comms component will then see this as another port. A hardware dongle that converts USB to serial (we supply this with a gas generator monitoring application for case where the user has a laptop with no serial ports.
(in fact this is the same thing as the previous item, but the driver is 'in' the dongle so there is no need for an install.) The third (not so easy) way is to write your own drivers (follow Nordlund's links??) Steve: Delphi a feersum engin indeed. RE: usb communication (Programmer) 26 Jun 06 08:36.
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Quote: Original Posted By TheKid Gan, ane coba install kok error ya? Bisa minta tolong kasih panduannya juga? Terima kasih banyak sebelumnya. Di readmesrc.html kan ada Installing UniDAC for Embarcadero RAD Studio XE5 using IDE If you are using CBuilder XE5, you should use the Using make-files way to install UniDAC.
Otherwise, run Delphi XE5 and perform the following steps: Build and compile the dac190.dpk DAC run-time package. To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build and compile the dacvcl190.dpk DAC GUI VCL related package.
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To make UniDAC work under Windows x64, this step must be repeated for this platform (can be selected in 'Target Platforms' of the package). Build and compile the dacfmx190.dpk DAC GUI FireMonkey related package. To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build and compile the dcldac190.dpk DAC design-time package. Build and compile the unidac190.dpk UniDAC run-time package.
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To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build and compile the unidacvcl190.dpk UniDAC GUI VCL related package. To make UniDAC work under Windows x64, this step must be repeated for this platform (can be selected in 'Target Platforms' of the package). Build and compile the unidacfmx190.dpk UniDAC GUI FireMonkey related package. Accounting an introduction atrilli pdf reader.
To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build, compile, and install the dclunidac190.dpk UniDAC design-time package.
Build, compile, and install the dclunidacfmx190.dpk UniDAC FireMonkey design-time package. Quote: Original Posted By anakdomba.kumal di readmesrc.html kan ada Installing UniDAC for Embarcadero RAD Studio XE5 using IDE If you are using CBuilder XE5, you should use the Using make-files way to install UniDAC. Otherwise, run Delphi XE5 and perform the following steps: Build and compile the dac190.dpk DAC run-time package. To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build and compile the dacvcl190.dpk DAC GUI VCL related package. To make UniDAC work under Windows x64, this step must be repeated for this platform (can be selected in 'Target Platforms' of the package). Build and compile the dacfmx190.dpk DAC GUI FireMonkey related package.
To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build and compile the dcldac190.dpk DAC design-time package. Build and compile the unidac190.dpk UniDAC run-time package. To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build and compile the unidacvcl190.dpk UniDAC GUI VCL related package. To make UniDAC work under Windows x64, this step must be repeated for this platform (can be selected in 'Target Platforms' of the package).
Build and compile the unidacfmx190.dpk UniDAC GUI FireMonkey related package. To make UniDAC work under Windows x64, Mac OS, iOS simulator, iOS device and Android, this step must be repeated for each of these platforms (can be selected in 'Target Platforms' of the package). Build, compile, and install the dclunidac190.dpk UniDAC design-time package. Build, compile, and install the dclunidacfmx190.dpk UniDAC FireMonkey design-time package. Quote: Original Posted By TheKid Untuk yang iOS apa jg harus di build and compile, soalnya sementara ini ane blum punya gadget iOS?
Dan ane coba compile di tanpa iOS hasilnya error di dacfmx190.dpk keterangannya dac190.bpl belum di compile (padahal udah ane compile cmn blm di OS X nya), gmn gan tolong kasih solusi? Thanks before.
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NOTE: To compile UniDAC based Delphi XE5 applications, add the UniDAC Source directory to 'Library Path' for all platforms you want to work with (32-bit Windows, 64-bit Windows, Mac OS, iOS simulator, iOS device, Android). Home 08:44 08:44.
Quote: Original Posted By anakdomba.kumal NOTE: To compile UniDAC based Delphi XE5 applications, add the UniDAC Source directory to 'Library Path' for all platforms you want to work with (32-bit Windows, 64-bit Windows, Mac OS, iOS simulator, iOS device, Android). Home Gan, udah ane add library path nya tapi tetep muncul error seperti ini: dcc32 Fatal Error UniTableEditor.pas(10): F1026 File not found: 'C: Program Files (x86) Embarcadero RAD Studio 12.0 source UniDAC Source Design Windows.dcu' ada kesalahan apa lagi nih ane? Maap merepotkan sekali lagi.
Quote: Original Posted By TheKid Gan, udah ane add library path nya tapi tetep muncul error seperti ini: dcc32 Fatal Error UniTableEditor.pas(10): F1026 File not found: 'C: Program Files (x86) Embarcadero RAD Studio 12.0 source UniDAC Source Design Windows.dcu' ada kesalahan apa lagi nih ane? Maap merepotkan sekali lagi.
Ane lom pegang delphi lagi.nanti ane coba dulu ye. Quote: Original Posted By odikz ada yang punya fast report 5.?? FastReport v4.15 Enterprise for XE6 Full Source unibytes.com/oYgQhUjx4dILqw-Us4P3UgBB Quote: Original Posted By Echizen.Ryoma Gan, ada komponen utk akses serial port selain tcomport? Saya pakai komponen tsb utk connect dgn alat Pole Display (USB) itu bisa munculin text di alatnya tapi ketika di-close programnya jd nge-hang.
Mgk ada yg punya komponen lain atau bisa kasih pencerahan kenapa kok bisa hang ketika di-close. BComPort for Delphi 3-2010 unibytes.com/uXWyqrqw3D8Lqw-Us4P3UgBB ComPort 4.11 Full Source for D3-XE2 unibytes.com/qVJ4EdCncc-B WinSoft 6 Components for Delphi 7 unibytes.com/U.5kK7qWikLqw-Us4P3UgBB Quote: Original Posted By gaban05 Gan, ada yang punya TMS Advanced Chart buat XE4? Sama TMS Intraweb buat Intraweb buat XE4 Intraweb 14 Thanks TMS Advanced Charts v3.5.2.2 for D7-XE3 (kracked) unibytes.com/TQSI67FPwJILqw-Us4P3UgBB TMS IntraWeb Component Pack Pro 4.9.0.0 Full Source unibytes.com/6tvdtJVzd4B 15:05 15:05.
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