Please help me with parallel ports! Thanks!

[bulletrick]

Hello. I just want to ask anyone the specific codes in Turbo C++/ Borland C++ to separately output a signal to the D0 - D7 pins of the parallel port.

My problem is that when i turn one pin ON, all other pins are also ON!

Please help... Thanx!

 

[bilgekaan]

you must do read , modify and write operation

try this . i dont know Turbo C port access function prototypes ,

so i used pseduo types outp( int portAddr , BYTE value ) BYTE inp( int portAddr )



void SetBit( BYTE bitNO )
{
BYTE mask = 1 >> bitNO ;
outp( portADDR, inp(portADDR) | mask );
}

void ClearBit ( BYTE bitNO )
{
BYTE mask = 1 >> bitNO ;

outp( portADDR, inp(portADDR) & ( ~mask ) );
}

 

[tgq]

good reply depends on the OS you have

 

[yogi]

try this one

here is the way to interface in C language

h**p://www.embeddedtronics.com:80/public/Electronics/minidaq/userport/UserPort.zip

download this file and unzip it

then copy Userport.sys to WINDOWS\SYSTEM32\DRIVERS

then run USERPORT.EXE

u will get a message driver started

Now u do programming in C/C++/JAVA and interface in XP or other version of Windows.

this one worked with me,for parallel port tutorials see
www.bibinjohn.tk

 

[kikinimiriam]

have you tried ANDing/ORing the bits?? to turn on bits, OR it with 1 and leave the rest with 0. to turn off bits, AND it with 0 and leave the rest with 1.

i hope i understood and answered your question.

 

[H_u_n_t_e_r]

1- **broken link removed** --> borland
2- **broken link removed** --> various language
3- take a llook to attach.

 

[yogi]

see this code

#include<dos.h>
void main()
{
outportb(0x378,0x02);
}

first u put userport in my previous post
then u run my programs given in my book, i explained full on that book, there is a section named getting started atleast read that one.

 

[btbass]

Also visit 'beyondlogic.org.' for a good explanation and sample code.