/* created by Bertrand VANDEPORTAELE */
const int inputPin = 12; //signal d'entrée
const int ledPin = 13; //broche 13=PB5
 char val=0;
char cpt=0;
unsigned int cpt2=0;


/* We start by including the library */
#include "LedControl.h"



/*
 * Now we create a new LedControl.
 * We use pins 12,11 and 10 on the Arduino for the SPI interface
 * Pin 9 is connected to the DATA IN-pin of the first MAX7221
 * Pin 11 is connected to the CLK-pin of the first MAX7221
 * Pin 10 is connected to the LOAD(/CS)-pin of the first MAX7221
 * There will only be a single MAX7221 attached to the arduino
 */
LedControl lc = LedControl(9, 11, 10, 1);

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void displayvalue(unsigned int val)
{
   lc.setChar(0, 0, '0'+val%10, false);
   lc.setChar(0, 1, '0'+(val/10)%10, false);
   lc.setChar(0, 2, '0'+(val/100)%10, false);
   lc.setChar(0, 3, '0'+(val/1000)%10, false);
   lc.setChar(0, 4, '0'+(val/10000)%10, false);
  
}
////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
  // start serial port at 9600 bps:
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  pinMode(inputPin, INPUT);
  /* while(1)    //pour test recopie simple
 {
   val = (PINB>>4) & 1;
 PORTB =  (PORTB & 0xdf) | (val<<5);
 }*/

  //wake up the MAX72XX from power-saving mode
  lc.shutdown(0, false);
  //set a medium brightness for the Leds
  lc.setIntensity(0, 8);
  //  lc.setLed(0,2,7,true);
  lc.setChar(0, 0, ' ', false);
  lc.setChar(0, 1, ' ', false);
  lc.setChar(0, 2, ' ', false);
  lc.setChar(0, 3, ' ', false);
  lc.setChar(0, 4, ' ', false);
  lc.setChar(0, 5, ' ', false);
  lc.setChar(0, 6, ' ', false);
  lc.setChar(0, 7, ' ', false);
  cpt2=0;
  
  
  }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void loop()
{
 while(1)
 {
while( ( (PINB>>4) & 1)==1); //attente front descendant 
cpt++;
if (cpt>=5)  //facteur de division /2 
{
//  delayMicroseconds(150); 
  PORTB =  (PORTB & 0xdf) | (val<<5);
  cpt=0;
  if (val==0) val=1; else val=0; 
}


 displayvalue(cpt2);
 cpt2++;
 if (cpt2>10000)
 cpt2=0;
while( ( (PINB>>4) & 1)==0); //attente front montant
}
}