Minitel/Mininet

/*
Programme de communication série avec un minitel.
Modification du code original de TetaLab.

Au démarrage du minitel:
Fnct+P puis 4 pour passer en 4800 bauds (1200 par défaut)
Fnct+T puis E pour désactiver l'écho local
*/

#include <SoftwareSerial.h>

int minled=13;
int usbled=6;
SoftwareSerial Minitel(7,8); // master
SoftwareSerial Minitelsl1(9,10); // RX, TX
SoftwareSerial Minitelsl2(11,12); // RX, TX

void setup()  
{
  pinMode(usbled,OUTPUT);
    pinMode(minled,OUTPUT);
  Minitel.begin(1200);

  // Open serial communications and wait for port to open:
  Serial.begin(1200);
  //while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  //}
digitalWrite(minled, HIGH);   // turn the LED on (HIGH is the voltage level)
 digitalWrite(usbled, HIGH);   // turn the LED on (HIGH is the voltage level)
   
    
    digitalWrite(minled, LOW);   // turn the LED on (HIGH is the voltage level)
 digitalWrite(usbled, LOW);   // turn the LED on (HIGH is the voltage level)
  // set the data rate for the SoftwareSerial port
  //Minitel.write(12); //efface l'écran; mySerial.write(12) remplace mySerial.print(12,BYTE)
 // serialprint7(14); // passe en mode graphique (0x0E)

}

void serialprint7(byte b) // permet d'ecrire en 7 bits + parité sur le software serial
{  digitalWrite(usbled, LOW);   // turn the LED on (HIGH is the voltage level)

  boolean  i = false;
  for(int j = 0; j<8;j++)
  {
    if (bitRead(b,j)==1) i =!i; //calcul de la parité
  }
  if (i) bitWrite(b,7,1); //ecriture de la partié
  else bitWrite(b,7,0);//ecriture de la partié
  Minitel.write(b);//ecriture du byte sur le software serial
  digitalWrite(usbled, HIGH);   // turn the LED on (HIGH is the voltage level)

}

void printMinitel(byte b) //transmission des messages du minitel
{  digitalWrite(minled, LOW);   // turn the LED on (HIGH is the voltage level)

  b= bitClear(b,7); //remet à 0 le bit de parité
  Serial.write(b); //écriture sur le port usb
    digitalWrite(minled, HIGH);   // turn the LED on (HIGH is the voltage level)

}
  void printMinitelM(byte b) //transmission des messages du minitel
{  digitalWrite(minled, LOW);   // turn the LED on (HIGH is the voltage level)

  //b= bitClear(b,7); //remet à 0 le bit de parité
  Minitel.write(b); //écriture sur le port usb
    digitalWrite(minled, HIGH);   // turn the LED on (HIGH is the voltage level)

}
  void printMinitelsl1(byte b) //transmission des messages du minitel
{  digitalWrite(minled, LOW);   // turn the LED on (HIGH is the voltage level)

  //b= bitClear(b,7); //remet à 0 le bit de parité
  Minitelsl1.write(b); //écriture sur le port usb
    digitalWrite(minled, HIGH);   // turn the LED on (HIGH is the voltage level)

}
  void printMinitelsl2(byte b) //transmission des messages du minitel
{  digitalWrite(minled, LOW);   // turn the LED on (HIGH is the voltage level)

  //b= bitClear(b,7); //remet à 0 le bit de parité
  Minitelsl2.write(b); //écriture sur le port usb
    digitalWrite(minled, HIGH);   // turn the LED on (HIGH is the voltage level)

}
void loop() // run over and over
{ delay (50);
  if (Minitel.available())
    {char c2=Minitel.read();
    printMinitelM(c2);delay(20);
    
      printMinitelsl1(c2);delay(20);
    printMinitelsl2(c2);delay(20);

}

if(Minitelsl1.available())
{char c2=Minitelsl1.read();
    printMinitelM(c2);}
    

if(Minitelsl2.available())
{char c2=Minitelsl2.read();
    printMinitelM(c2);}

    
  if (Serial.available())
    serialprint7(Serial.read());
}