//SCULLCOM HOBBY ELECTRONICS
//FUNCTION GENERATOR
//Software Version 2

#include "LedControl.h"     //MAX72XX Seven Segment Library
#include <FreqCounter.h>    //Frequency Counter Library

//digital pin 5 is input for frequency

// Arduino digital pin 12 is connected to the DataIn 
// Arduino digital pin 11 is connected to the CLK 
// Arduino digital pin 10 is connected to LOAD 
// number of devices is 2 (2 x 4 seven segment display modules)

LedControl lc=LedControl(12,11,10,2);

unsigned long frq;


void setup()
{
  
/*
   The MAX7219 is in power-saving mode on startup,
   we have to do a wakeup call
*/
  
// Initialize the MAX7219 device
lc.shutdown(0,false);           // Enable display
lc.setIntensity(0,10);          // Set brightness level of 7 Segment LED's (0 is min, 15 is max)
lc.clearDisplay(0);             // Clear display register

  lc.setRow(0,7,B01011011);     //letter S
  lc.setRow(0,6,B01001110);     //letter C
  lc.setRow(0,5,B00111110);     //letter U
  lc.setRow(0,4,B00001110);     //letter L
  lc.setRow(0,3,B00001110);     //letter L
  lc.setRow(0,2,B01001110);     //letter C
  lc.setRow(0,1,B01111110);     //letter O
  lc.setRow(0,0,B01110110);     //letter M
  delay (1000);                 // delay before going in to frequency counting mode
  lc.clearDisplay(0);
}

void printNumber(unsigned long v) {
    unsigned long ones;
    unsigned long tens;
    unsigned long hundreds;
    unsigned long thousands;
    unsigned long tenthousands;
    unsigned long hundredthousands;

    ones=v%10;
    v=v/10;
    tens=v%10;
    v=v/10;
    hundreds=v%10;
    v=v/10;
    thousands=v%10;
    v=v/10;
    tenthousands=v%10;
    v=v/10;
    hundredthousands=v;
    
    if(frq<100000)
    {
    lc.setRow(0,7,B00000000);
    }
    else
    {
      lc.setDigit(0,7,(byte)hundredthousands,false);
    }
    
    
    if(frq<10000)
    {
    lc.setRow(0,6,B00000000);
    }
    else
    {
      lc.setDigit(0,6,(byte)tenthousands,false);
    }

    
    if(frq<1000)
    {
    lc.setRow(0,5,B00000000);
    }
    else
    {
      lc.setDigit(0,5,(byte)thousands,false);
    }   

 if(frq<100)
    {
    lc.setRow(0,4,B00000000);
    }
    else
    {
      lc.setDigit(0,4,(byte)hundreds,false);
    }

if(frq<10)
    {
    lc.setRow(0,3,B00000000);
    }
    else
    {
      lc.setDigit(0,3,(byte)tens,false);
    }
    
    lc.setDigit(0,2,(byte)ones,false);
    
    lc.setRow(0,0,B00110111); //print letter H for Hertz
}

void loop() { 
  
  // wait if any serial is going on
  FreqCounter::f_comp=140;      // Calibation Value of 140 - change value to calibrate with professional Frequency Counter if one available.
  FreqCounter::start(1000);     // 1000 mSec Gate Time

  while (FreqCounter::f_ready == 0) 
  frq=FreqCounter::f_freq;
  printNumber(frq);
  delay(20);
}