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It’s C/C++ in programming to communicate with Serial Port or comport (RS-232). The program I recommend here can communicate between two computers that can send message to each other as interrupt.

For here, we will use Borland C as complier, but you will see me use // that I make for programming explanation. There will be code for reference inter like the following,

Intervector –> use setvect()function for setting the value of IRQ

Intervector –> use getvect()function for the value of IRQ

Intervector –> use for setting of Programmable Interrrupt Controller

Intervector –> use for setting in order to cancel using intervector

Comm Setting –> will use the value in setting rate of Baud rate, the number of bit in transferring data, stop bit, control register FIFO, open DTR-RTS-OUT2. Read the rest of this entry »

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After studying about communication with data or controlling output devices through Serial Port. In this part, We will learn about programming by Visual Basic through Serial Port for using programming to communicate with Bus system I2C (Inter Integrated Circuit ). You can find more information here http://www.esacademy.com/faq/i2c/.

Why do you have to use this system? Because there will be communication between IC and Module that can order or communicate in many and a long distance that have receiver and sender, the main module or Master to control all working in the system. For another module that is Slave will be controlled. The working of couple modules in this system, will be controlled by 2 signal lines, they have data line and signal line clock in order to use in setting rhythm of working. For taking devices or modules to connect in this system, it can be done by taking module to parallel, will use pressure level of electrical resource in each module will not be equal. Read the rest of this entry »

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As we know that VB can’t program to connect through Parallel Port directly. In the book, there will be explanation that we create DLL files that can write by using whatever language that has the function connecting to port. This website I have ever presented programming by C++, using Inp function for getting value along port and out is sending value out along port.

So now, we will introduce creating DLL file (Dynamic LInk LIbrary) by Borland Delphi, using Assembly programming to help for connecting through port by using the function of Assembly.

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We can’t program by using Visual Basic, then connecting through Parallel port directly. We have to create DLL (Dynamic LInk LIbrary) file in order to borrow function connecting I/O port of the other languages to use. We can program by using functions that can connect port. In this article, I will present programming by C++ first. For someone who likes to program by Borland Delphi, click here. Let’s begin program DII file by MS VC++6 by using function connect with Input and Output of port like this,

1. _Inp that is function that will read value from input port’s position that has the function like this,

_Inp = read value as byte, we will set function name in order to be use in VB- - - > inpVB

_Inpw = read value as word, we will set function name in order to be used in VB - - - > inpwVB

_Inpd = read value as double words, we will set function name in order to used in VB - - - > inpdwVB Read the rest of this entry »

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