Good Site to learn Interfacing with C

[electrojit]

https://www.learn-c.com/

download the whole site with "Offline Explorer" and enjoy the contents offline at your convinence

 

[yogi]

read my experience in parallel port interfacing from yahoo group-booksbybibin
**broken link removed**

Bibin John
www.bibinjohn.tk

 

[shabab]

try this program

#include"stdio.h"
#include"conio.h"
#include"graphics.h"
#include"dos.h"
#include"stdlib.h"
#define esc 27
#define outport 0x378
#define ledon 0xff
#define ledoff 0x00
int static no[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
int c,f=0;
void button (int,int,int,int,char[]);
void blink (int,int,int,int);
void display (void);
void main (void)
{
int dr=DETECT,m,a,b;
initgraph(&dr,&m,"c:\\tc\\bgi");
char ch,name[10];
main:
cleardevice();
display();
button(80,75,130,100," A");
button(80,125,130,150," B");
button(80,175,130,200," C");
button(80,225,130,250," D");
button(80,275,130,300," E");
button(80,325,130,350," F");
button(80,375,130,400,"EXIT");
setcolor(1);
settextstyle(11,0,3);
outtextxy(140,390,"PRESS ESC TO EXIT");
outtextxy(140,90,"GLOW LED OF YOUR CHOICE");
outtextxy(140,140,"LED BLINKING");
outtextxy(140,190,"ROTATE LEFT");
outtextxy(140,240,"ROTATE RIGHT");
outtextxy(140,290,"ROTATE LEFT + RIGHT");
outtextxy(140,340,"ONE ON ONE OFF");
ch=getch();
if(ch==27)     //for exit
{
closegraph();
exit(0);
}
else
if(ch=='a' || ch=='A')   //Enter Led No       A
{
rep:
cleardevice();
display();
setcolor(1);
setfillstyle(1,0);
rectangle(100,100,550,300);     //black
floodfill(120,120,1);
setcolor(1);
rectangle(315,140,330,160);//small blue
setcolor(4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
setcolor(1);
settextstyle(10,0,1);
outtextxy(180,100,"ENTER LED NO 0 - 7");
gotoxy(41,10);
gets(name);
if(name[0]==48)      //led 0 glow
{
outportb(outport,no[0]);
setcolor(4);
setfillstyle(1,4);
floodfill(261,181,4);
}
if(name[0]==49)      //led 1 glow
{
outportb(outport,no[1]);
setcolor(4);
setfillstyle(1,4);
floodfill(281,181,4);
}
if(name[0]==50)      //led 2 glow
{
outportb(outport,no[2]);
setcolor(4);
setfillstyle(1,4);
floodfill(301,181,4);
}
if(name[0]==51)      //led 3 glow
{
outportb(outport,no[3]);
setcolor(4);
setfillstyle(1,4);
floodfill(321,181,4);
}
if(name[0]==52)      //led 4 glow
{
outportb(outport,no[4]);
setcolor(4);
setfillstyle(1,4);
floodfill(341,181,4);
}
if(name[0]==53)      //led 5 glow
{
outportb(outport,no[5]);
setcolor(4);
setfillstyle(1,4);
floodfill(361,181,4);
}
if(name[0]==54)      //led 6 glow
{
outportb(outport,no[6]);
setcolor(4);
setfillstyle(1,4);
floodfill(381,181,4);
}
if(name[0]==55)      //led 7 glow
{
outportb(outport,no[7]);
setcolor(4);
setfillstyle(1,4);
floodfill(401,181,4);
}
setcolor(1);
settextstyle(11,0,10);
outtextxy(210,350,"PRESS R TO RETURN TO MAIN");
outtextxy(240,370,"PRESS ESC TO EXIT");
ch=getch();
if(ch=='r' || ch=='R')
goto main;
else
if(ch==27)     //for exit
{
closegraph();
exit(0);
}
else
goto rep;
}                                // A END
			     ////////// LED NO B
if(ch=='b' || ch=='B')
{

cleardevice();
display();
setcolor(1);
setfillstyle(1,0);
rectangle(100,100,550,300);     //black
floodfill(120,120,1);
setcolor(4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0


setcolor(14);
settextstyle(10,0,1);
outtextxy(145,100,"PRESS ANY KEY TO STOP");
setcolor(1);
settextstyle(11,0,10);
outtextxy(210,350,"PRESS R TO RETURN TO MAIN");
outtextxy(240,370,"PRESS ESC TO EXIT");
int a=4;
while(!kbhit())
{
//harware interface
outportb(outport,ledon);
setcolor(11);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
setfillstyle(1,a);
floodfill(261,181,11);
floodfill(281,181,11);
floodfill(301,181,11);
floodfill(321,181,11);
floodfill(341,181,11);
floodfill(361,181,11);
floodfill(381,181,11);
floodfill(401,181,11);
delay(800);
outportb(outport,ledoff);
a=0;
setcolor(11);
setfillstyle(1,a);
floodfill(261,181,11);
floodfill(281,181,11);
floodfill(301,181,11);
floodfill(321,181,11);
floodfill(341,181,11);
floodfill(361,181,11);
floodfill(381,181,11);
floodfill(401,181,11);
a=4;
delay(800);
}


ch=getch();
if(ch=='r' || ch=='R')
goto main;
else
if(ch==27)     //for exit
{
closegraph();
exit(0);
}
}                             ///////// B END
			     //led no C
if(ch=='c' || ch=='C')
{
cleardevice();
display();
setcolor(1);
setfillstyle(1,0);
rectangle(100,100,550,300);     //black
floodfill(120,120,1);
setcolor(4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
setcolor(14);
settextstyle(10,0,1);
outtextxy(145,100,"PRESS ANY KEY TO STOP");
setcolor(1);
settextstyle(11,0,10);
outtextxy(210,350,"PRESS R TO RETURN TO MAIN");
outtextxy(240,370,"PRESS ESC TO EXIT");
c=401;
while(!kbhit())
{
setcolor(11);
setfillstyle(1,4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
floodfill(c,181,11);
delay(200);
setfillstyle(1,0);
floodfill(c,181,11);
delay(200);
c-=20;
if(c==241)
c=401;

// hardware
for(a=0;a<=7;a++)
{
outportb(outport,no[a]);
delay(800);
}
}
ch=getch();
if(ch=='r' || ch=='R')
goto main;
else
if(ch==27)     //for exit
{
closegraph();
exit(0);
}//////////////    c end
}
 //////////////////////   d
if(ch=='d' || ch=='D')
{
cleardevice();
display();
setcolor(1);
setfillstyle(1,0);
rectangle(100,100,550,300);     //black
floodfill(120,120,1);
setcolor(4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
setcolor(14);
settextstyle(10,0,1);
outtextxy(145,100,"PRESS ANY KEY TO STOP");
setcolor(1);
settextstyle(11,0,10);
outtextxy(210,350,"PRESS R TO RETURN TO MAIN");
outtextxy(240,370,"PRESS ESC TO EXIT");
c=261;
while(!kbhit())
{
setcolor(11);
setfillstyle(1,4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
floodfill(c,181,11);
delay(500);
setfillstyle(1,0);
floodfill(c,181,11);
delay(500);
c+=20;
if(c==421)
c=261;
// hard ware
for(a=7;a>=0;a--)
{
outportb(outport,no[a]);
delay(800);
}
}
ch=getch();
if(ch=='r' || ch=='R')
goto main;
else
if(ch==27)     //for exit
{
closegraph();
exit(0);
}///////////
}                   ////////// d end
 //////////////////////   e
if(ch=='e' || ch=='E')
{
cleardevice();
display();
setcolor(1);
setfillstyle(1,0);
rectangle(100,100,550,300);     //black
floodfill(120,120,1);
setcolor(4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
setcolor(14);
settextstyle(10,0,1);
outtextxy(145,100,"PRESS ANY KEY TO STOP");
setcolor(1);
settextstyle(11,0,10);
outtextxy(210,350,"PRESS R TO RETURN TO MAIN");
outtextxy(240,370,"PRESS ESC TO EXIT");
c=401;
while(!kbhit())
{
setcolor(11);
setfillstyle(1,4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
if(f==0)
{
floodfill(c,181,11);
delay(100);
setfillstyle(1,0);
floodfill(c,181,11);
delay(100);
c-=20;
if(c==241)
{
f=1;
c=261;
}
}
if(f==1)
{
floodfill(c,181,11);
delay(5);
setfillstyle(1,0);
floodfill(c,181,11);
delay(5);
c+=20;
if(c==421)
{
f=0;
c=401;
}
}
// hard ware
for(a=7;a>=0;a--)
{
outportb(outport,no[a]);
delay(800);
}
for(a=0;a<=7;a++)
{
outportb(outport,no[a]);
delay(800);
}
}
ch=getch();
if(ch=='r' || ch=='R')
goto main;
else
if(ch==27)     //for exit
{
closegraph();
exit(0);
}///////////
}                   ////////// e end
 //////////////////////   f
if(ch=='f' || ch=='F')
{
cleardevice();
display();
setcolor(1);
setfillstyle(1,0);
rectangle(100,100,550,300);     //black
floodfill(120,120,1);
setcolor(4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
setcolor(14);
settextstyle(10,0,1);
outtextxy(145,100,"PRESS ANY KEY TO STOP");
setcolor(1);
settextstyle(11,0,10);
outtextxy(210,350,"PRESS R TO RETURN TO MAIN");
outtextxy(240,370,"PRESS ESC TO EXIT");
while(!kbhit())
{
setcolor(11);
setfillstyle(1,4);
circle(400,180,5);//led 7
circle(380,180,5);//led 6
circle(360,180,5);//led 5
circle(340,180,5);//led 4
circle(320,180,5);//led 3
circle(300,180,5);//led 2
circle(280,180,5);//led 1
circle(260,180,5);//led 0
floodfill(401,181,11);
floodfill(361,181,11);
floodfill(321,181,11);
floodfill(281,181,11);
delay(500);
setfillstyle(1,0);
floodfill(401,181,11);
floodfill(361,181,11);
floodfill(321,181,11);
floodfill(281,181,11);
delay(500);
setfillstyle(1,4);
floodfill(381,181,11);
floodfill(341,181,11);
floodfill(301,181,11);
floodfill(261,181,11);
delay(500);
setfillstyle(1,0);
floodfill(381,181,11);
floodfill(341,181,11);
floodfill(301,181,11);
floodfill(261,181,11);
delay(500);

// hard ware

outportb(outport,no[0xaa]) ;
delay(800);
outportb(outport,no[0x55]) ;

}
ch=getch();
if(ch=='r' || ch=='R')
goto main;
else
if(ch==27)     //for exit
{
closegraph();
exit(0);
}///////////
}                   ////////// f end


getch();
closegraph();
}                  // main end

void display (void)
{
int i,f[10]={7,7,100,30,320,60,520,30,629,7};
setcolor(13);
setfillstyle(1,3);
rectangle(1,1,638,478);
floodfill(5,5,13);
setcolor(11);
setfillstyle(7,9);    /* Text Background  */
fillpoly(5,f);        /* Text Fillpoly  */
setcolor(14);
settextstyle(7,0,3);
outtextxy(170,6,"L E D - D I S P L A Y");
setcolor(1);
settextstyle(11,0,3);
outtextxy(150,445,"Copyright Hasan & Atif PRODUCTIONS 2006");
outtextxy(220,457,"  All Rights Reserved");
}

void button (int c1,int r1,int c2,int r2,char ch[])
{
setcolor(0);
rectangle(c1+1,r1+1,c2+2,r2+2);
setcolor(8);
rectangle(c1+2,r1+2,c2+1,r2+1);
setcolor(15);
rectangle(c1-1,r1-1,c2,r2);
setcolor(7);
setfillstyle(1,7);
rectangle(c1,r1,c2,r2);
floodfill(c1+5,r1+5,7);
setcolor(0);
outtextxy(c1+11,r1+7,ch);
}
void blink (int c1,int r1,int c2,int r2)
{
setcolor(8);
rectangle(c1-1,r1-1,c2-2,r2-2);
setcolor(0);
rectangle(c1-2,r1-2,c2-1,r2-1);
setcolor(15);
rectangle(c1,r1,c2+1,r2+1);
setcolor(7);
setfillstyle(1,7);
rectangle(c1,r1,c2,r2);
floodfill(c1+5,r1+5,7);
}