RS232 ET PORT //

#include <stdio.h>
#include <conio.h>
#include <dos.h>
#include <math.h>
int t[9];
void deb(char c)  // covertisseur  dcimale-binaire
{
 int i=8;
  float f=c;
  while(i!=0)
  {
    if (f/2-floor(f/2)==0)
    {
      t[i]=0;
       }
    else
     {
      t[i]=1;
       }
       f=floor(f/2);
       i--;
    }
     for(i=1;i<=8;i++)
      printf("  %d",t[i]);
}

void init() // dessin de l'interface
{
   textbackground(0);
   window(4,6,23,8);
   clrscr();
   window(26,6,38,8);
   clrscr();
   window(22,15,50,17);
   clrscr();
   window(22,30,50,33);
   clrscr();
   window(22,20,50,25);
   clrscr();
   window(22,20,50,25);
   clrscr();
   window(29,40,78,42);
   clrscr();
}
void configuS(char c) // configuration des ports S&#8218;ries
 {
  /* outportb(0x3f8+3,0x80);
   outportb(0x3f8,0x00);
   outportb(0x3f9,0xff);
   outportb(0x3f8+3,0x03);
   outportb(0x3f8,c);*/

   asm{
	mov dx,3fbh
	mov ax,8h
	 out  dx,ax;
	mov dx,03f8h;
	mov ax,0
	 out dx,ax;
	mov dx,03f9h
	mov ax,0ffh
	 out dx,ax;
	mov dx,03fbh;
	mov ax,03h;
	 out dx,ax;
	mov dx,03f8h;

	}
   _AX=c;
       asm{
	   out dx,ax;
	 }


  }
void configuP(char c) // configuration des ports parall¦les
 {
  /* outportb(0x37A,0x04);
   outportb(0x378,c);*/
  asm{
      mov ax,04h
      mov dx,37ah
      out dx,ax
     }

   _AX=c;

   asm{ mov dx,378h;
	out dx,ax;
      }
     }
void signS() /* Fonction reserv&#8218;es aux ports s&#8218;ries  il permet  de synchronser
                  la transmission avec la clin sur l'ecran*/
             // en effet g essayer d'abaisser la vitess de transmission jusqa 1 bit par secende 
             // pour rendre le transmission visibile "des fins pedagogique"
             
             //Alors pour visualiser la transmission il faut executer le program sur in P III  800Mhz


{

   delay(100);
    for(int i=0;i<8;i++)
     {

	textbackground(7);
	clrscr();
	delay(264);
	textbackground(6);
	clrscr();
	gotoxy(2,3);
	cprintf("Transmission en cours..... ");
	textbackground(3);
	window(22,30,50,33);
	clrscr();
	gotoxy(14,3);
	cprintf("%d",t[8-i]);
	window(22,20,50,25);
	delay(264);

      }

}

main() //le programme principale
 { char c;
  clrscr();
  debut:
   init();
   textcolor(0);
   _setcursortype(_SOLIDCURSOR);
   textbackground(11);
   window(4,6,23,8);
   clrscr();
   gotoxy(1,3);
   cprintf(" Veuillerz dtaper un caract¦re ");
   textbackground(7);
   window(26,6,38,8);
   clrscr();
    gotoxy(6,2);
   cscanf("%c",&c);
   textbackground(7);
   window(22,15,50,17);
   _setcursortype(_NOCURSOR);
   clrscr();
   gotoxy(1,2);
   deb(c);
   textbackground(6);
   window(22,20,50,25);
   clrscr();
   gotoxy(2,2);
   int b;
   char s;
   cprintf("Tapez: 'S'----> Port S&#8218;rie \n");
   cprintf("       'P'----> Port Parall¦le ");
   error:
   s=getch();
   if (s=='s')
   {
    configuS(c);
    signS();

     }
     else if(s=='p')
      {
       configuP(c);
       }
       else
       {
	goto error;
       }

     textbackground(4);
     clrscr();
     gotoxy(1,3);
     cprintf("Transmission Termin&#8218;e \t avec succ&#8218;e!!!!");
     textbackground(7);
     window(29,40,78,42);
     clrscr();
     gotoxy(1,2);
     cprintf("Tapez 'Q' pour Quitter et 'ENTRER' pour continuer ");
     revenir:
     c=getch();
     if (c==13)
	goto debut;
     if (c!='q')
     goto revenir;

 }