Project description

• The 5 bits of LPT Port are capable of receiving 5 discrete digital signals.

• These signals are read simultaneously and displayed in graphical form.

• A logic analyzer is useful in electronic development and debugging, especially where fast logic circuits are involved with lots of signals whose relations have to be verified or examined.

• A logic analizer is a like a recorder for digital signals. During a certain (small) period of time, the state of a few digital lines can be recorded to a file. An event can be specified to signal the start of the recording, i.e. line 1 toggeling from 0 to 1.

• This recording can be viewed afterwards, which may be stored in the form of files.
  

Screen Shot of the VB program

This is the screen shot of the program that i tried to make  ....

This program is implemented in VB,but i had implemented it in C++

it was a tedious task to make this in C++ as its options are very much less when comparing it with Visual basic

Basics of parallel port

It's the layout of the LPT port
I have programmed in C++ by taking this pin diagram
and also by locating the LPT port address from the device manager
I found out that there are 3 ports and they have seperate address
DATA PORT-0x378
STATUS PORT-0x379
CONTROL PORT-0x37a