Combining keypad and 8 digit 7 segment display (SKU DFR0646\DFR0645)

Hi

I am trying to write to the individual digits of the “8 digit 7 segment display”, but I am not able to do it based on an array (or other variables).

I am able to write both to the individual segments and send doubles into it, but I would like the input to come from an array.

So instead of:

I would like the individual segments to come from an array (that have 8 values that comes from the keypad):

The reason why I would like to do it as sending to the individual digits, is because the remaining figures should be “blank”.

I think that the problem is because of the value comming from the keypad is “char” and then it instert it in the print-command of the segment display as 48, 49, 50 etc. instead of 0, 1, 2 etc.

Thanks in advance - I have tried for five hours and I am getting kind of frustated.

/Henrik

// Libraries

#include <Keypad.h>

#include "DFRobot_LedDisplayModule.h"

// Set Up KeypadObject

const byte ROWS = 4;

const byte COLS = 3;

char keys[ROWS][COLS] = {

  {'1','2','3'},

  {'4','5','6'},

  {'7','8','9'},

  {'*','0','#'}

};

byte rowPins[ROWS] = {6, 11, 10, 8}; // Row pinouts of the keypad

byte colPins[COLS] = {7, 5, 9}; // Column pinouts of the keypad

// Create KeypadObject

Keypad KeypadObject = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

// Create LEDDisplaySegmentObject

DFRobot_LedDisplayModule LEDDisplaySegmentObject(&Wire, 0xE0);

// Create Variables

int KeypadInputNo = -1;

int KeypadInputArray[8] = {"","","","","4","","",""};

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

//// Setup

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

void setup(){

  Serial.begin(9600);

  /*Wait for the chip to be initialized completely, and then exit*/

  while(LEDDisplaySegmentObject.begin(LEDDisplaySegmentObject.e8Bit) != 0)

  {

    Serial.println("Failed to initialize the chip , please confirm the chip connection!");

    delay(1000);

  }

  //Set LEDDisplaySegmentObject Display Area

  LEDDisplaySegmentObject.setDisplayArea(1,2,3,4,5,6,7,8);

  //Clear LEDDisplaySegmentObject Display Area

  LEDDisplaySegmentObject.print("","","","","","","","");

  //Print "KLAR"

  Serial.println("<<<KLAR>>>");

}

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

//// Main Loop

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

void loop(){

  //Get CurrentKeyPress

  char CurrentKeyPress = KeypadObject.getKey();

  if (CurrentKeyPress){

    if ((CurrentKeyPress == 48) || (CurrentKeyPress == 49) || (CurrentKeyPress == 50) || (CurrentKeyPress == 51) || (CurrentKeyPress == 52) || (CurrentKeyPress == 53) || (CurrentKeyPress == 54) || (CurrentKeyPress == 55) || (CurrentKeyPress == 56) || (CurrentKeyPress == 57)){

      //Update KeypadInputNo

      KeypadInputNo = KeypadInputNo + 1;

      //Update KeypadInputArray

      KeypadInputArray[KeypadInputNo] = CurrentKeyPress;

      //Write Current Input To Serial Monitor

      Serial.print("No. ");

      Serial.print(KeypadInputNo);

      Serial.print(" - ");

      Serial.println(KeypadInputArray[KeypadInputNo]);

      //Update Display   LEDDisplaySegmentObject.print(KeypadInputArray[0],KeypadInputArray[1],KeypadInputArray[2],KeypadInputArray[3],KeypadInputArray[4],KeypadInputArray[5],KeypadInputArray[6],KeypadInputArray[7]);

      //Check For Correct Input If Last Digit

      if (KeypadInputNo == 7){

        CheckForCorrectInput(KeypadInputNo);

      }

    }

  }

}

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

//// Check For Correct Input

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

void CheckForCorrectInput(int& KeypadInputNo){

  //Write Status To Serial Monitor

  Serial.println("TEST FULL INPUT");

  //Reset KeypadInputNo

  KeypadInputNo = -1;

  //Perform Code For Wrong Input

  InputIsWrong();

}

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

//// Input Is Correct

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

void InputIsCorrect(){

}

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

//// Input Is Wrong

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

void InputIsWrong(){

  //Make Display Flash For Two Seconds

  LEDDisplaySegmentObject.flashHalfs();

  delay(2000);

  LEDDisplaySegmentObject.stopFlash();

  //Reset Display

  LEDDisplaySegmentObject.print("","","","","","","","");

}