VB/WinAPI, Getting Data from Serial Port using Comm Control

Getting Data from Serial Port using Comm Control

Author	Message
Hernan Orellan #1 / 4	Getting Data from Serial Port using Comm Control I would like to use an array of switches to control things in Windows98. I was thinking that each switch could be attached to a resistor of a different value. Thus each switch provides a different level of resistance. My question then is... 1) what circuit could I use to generate a serial port compatible signal, 2) how can I read the serial port with VB to get the value? Thanks Hernan
Fri, 21 Sep 2001 03:00:00 GMT

Donald Grove #2 / 4	Getting Data from Serial Port using Comm Control There is chance of possible damage to system doing it that way Use the joystick buttons and read them off 2 joy sticks x4 buttons = 8 Quote: >I would like to use an array of switches to control things in >Windows98. I was thinking that each switch > could be attached to a resistor of a different value. Thus each switch >provides a different level of >resistance. My question then is... 1) what circuit could I use to >generate a serial port compatible signal, >2) how can I read the serial port with VB to get the value? >Thanks >Hernan
Sat, 22 Sep 2001 03:00:00 GMT

Richard Grie #3 / 4	Getting Data from Serial Port using Comm Control Hi, You might want to use the parallel port, rather than the serial port for this. The actual implementation is difficult to say without knowing more -- if you want to monitor two or three inputs, then you could use the serial port (say, using MSCommx.RTSHolding to monitor RTS, and MSCommx.CDHolding to monitor CD, etc.). You can monitor five bits on the parallel port, and these could be multiplexed to actually obtain the status of hundreds of inputs. I suggest that you go to the books link on my homepage, and look at Jan Axelson's book, Parallel Port Complete. It covers the implementation of just such circuitry in detail (with programs). -- Richard Grier Hard & Software 12962 West Louisiana Avenue Lakewood, CO 80228 303-986-2179 (voice) 303-986-3143 (fax) Author of Visual Basic Programmer's Guide to Serial Communications, 2nd Edition (355 pages). For information look on my homepage at http://www.hardandsoftware.net. Use the Books link to order. For faster service contact the publisher at http://www.mabry.com.
Sat, 22 Sep 2001 03:00:00 GMT

Hernan Orellan #4 / 4	Getting Data from Serial Port using Comm Control Thank you for the information! Hernan Quote: > I would like to use an array of switches to control things in > Windows98. I was thinking that each switch > could be attached to a resistor of a different value. Thus each switch > provides a different level of > resistance. My question then is... 1) what circuit could I use to > generate a serial port compatible signal, > 2) how can I read the serial port with VB to get the value? > Thanks > Hernan
Sat, 22 Sep 2001 03:00:00 GMT

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