how can i write or read (to) from lpt port ( parallel port ) by vb code ( please guide me)?

Question

i want to write binery code to lpt port to control 2 stepper motor , also i want read the port for two sensors
please guide me by VB code becuase I developed the control program by VB

Answer 1

Well, that's going back to the days. You're better off using the serial port. You can use VB to open a COM Port. Try this link:

http://support.microsoft.com/kb/39342

Search for articles on using QuickBasic. The coding is pretty much the same to open the COM port. You can then assign a variable to send commands to an interface.

You may want to use a Triac or Diac for the motor tied into a DAC from the interface you attach to the COM port.

Answer 2

On the printer it's an LPT port, on the computer it's a parallel port. Both transmit and receive data on more than one line. It's also termed an RS-232 port using a DB-25 connector. This eventually lead to using a a centronix type connector for some printers, which used a slot type mounting.