Faire sa propre centrale DCC

#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "Arduino.h"
#include "Print.h"

// segment pins
#define SEGa 22
#define SEGb 23
#define SEGc 24
#define SEGd 25
#define SEGe 26
#define SEGf 27
#define SEGg 28
#define SEGdp 29

// digit pins
#define K1 37
#define K2 36
#define K3 35
#define K4 34
#define K5 33
#define K6 32
#define K7 31
#define K8 30

// leds
#define D1 49
#define D2 48
#define D3 47
#define D4 46
#define D5 45
#define D6 44
#define D7 43
#define D8 13

// clés aiguilles
#define A1 38
#define A2 39
#define A3 40
#define A4 41
#define IT 42

// globals
byte _seg[8];
byte _allseg[64];
byte _zero[8] = { 1,1,1,1,1,1,0,0 };
byte _un[8] = { 0,1,1,0,0,0,0,0 };
byte _deux[8] = { 1,1,0,1,1,0,1,0 };
byte _trois[8] = { 1,1,1,1,0,0,1,0 };
byte _quatre[8] = { 0,1,1,0,0,1,1,0 };
byte _cinq[8] = { 1,0,1,1,0,1,1,0 };
byte _six[8] = { 1,0,1,1,1,1,1,0 };
byte _sept[8] = { 1,1,1,0,0,0,0,0 };
byte _huit[8] = { 1,1,1,1,1,1,1,0 };
byte _neuf[8] = { 1,1,1,0,0,1,1,0 };
byte _dig[8];
byte _led[8];
int i;
int j;
int k;
boolean debug = true;


void setup(void) {

  // pin numbers initialization
  _seg[0] = SEGa;
  _seg[1] = SEGb;
  _seg[2] = SEGc;
  _seg[3] = SEGd;
  _seg[4] = SEGe;
  _seg[5] = SEGf;
  _seg[6] = SEGg;
  _seg[7] = SEGdp;

  _dig[0] = K1;
  _dig[1] = K2;
  _dig[2] = K3;
  _dig[3] = K4;
  _dig[4] = K5;
  _dig[5] = K6;
  _dig[6] = K7;
  _dig[7] = K8;

  _led[0] = D1;
  _led[1] = D2;
  _led[2] = D3;
  _led[3] = D4;
  _led[4] = D5;
  _led[5] = D6;
  _led[6] = D7;
  _led[7] = D8;
 
for (i = 0; i < 8; i++) {
  pinMode(_seg[i], OUTPUT);
  digitalWrite(_seg[i], HIGH);
  pinMode(_dig[i], OUTPUT);
  digitalWrite(_dig[i], HIGH); // tous eteints
  pinMode(_led[i], OUTPUT);
  digitalWrite(_led[i], LOW);  // routes eteintes
  }
 
for (i = 0; i < 8; i++) {
  _allseg[i] = _zero[i];
  }
for (i = 0; i < 8; i++) {
  _allseg[i+8] = _un[i];
  }
for (i = 0; i < 8; i++) {
  _allseg[i+16] = _deux[i];
  }
for (i = 0; i < 8; i++) {
  _allseg[i+24] = _trois[i];
  }
for (i = 0; i < 8; i++) {
  _allseg[i+32] = _quatre[i];
  }
for (i = 0; i < 8; i++) {
  _allseg[i+40] = _cinq[i];
  }
for (i = 0; i < 8; i++) {
  _allseg[i+48] = _six[i];
  }
for (i = 0; i < 8; i++) {
  _allseg[i+56] = _sept[i];
  }


pinMode(A1, INPUT_PULLUP);
pinMode(A2, INPUT_PULLUP);
pinMode(A3, INPUT_PULLUP);
pinMode(A4, INPUT_PULLUP);
pinMode(IT, INPUT_PULLUP);

Serial.begin(9600);
 
}

void loop(void) {
 
 
for (i = 0; i < 8; i++) {
  for (j = 0; j < 8; j++) {
  digitalWrite(_seg[j], _allseg[j+8*i]);    // recopie des segments
  }
  digitalWrite(_dig[i], LOW);      // allume un digit
  delay(2);
  digitalWrite(_dig[i], HIGH);      // éteint le digit
  }
 
  digitalWrite(_led[0] , digitalRead(A1)); // A1 droit
  digitalWrite(_led[2] , !digitalRead(A1)); // A1 devie
  digitalWrite(_led[3] , !digitalRead(A2)); // A2 devie
  digitalWrite(_led[1] , digitalRead(A2) & !digitalRead(A3));
  digitalWrite(_led[4] , digitalRead(A2) & digitalRead(A3));
  digitalWrite(_led[5] , !digitalRead(A4)); // A4 droit (entrée sortie de garage)
  digitalWrite(_led[6] , digitalRead(A4)); // A4 devie (boucle garage)
 
  if (!digitalRead(IT)) {
    for (i = 0; i < 8; i++) {
      digitalWrite(_led[i], HIGH);
    }
    delay(2);
  }
 
if (Serial.available())  {
  char inByte = Serial.read();
  switch (inByte) {
  case '=' :
  for (i = 0; i<8; i++) {
    Serial.print(digitalRead(_led[i]));
  }
  Serial.println();
  break;
  }
}
 
}