/* Arduino Control Stepper with Keypad and LCD

Created by Yvan / https://Brainy-Bits.com
This code is in the public domain...
You can: copy it, use it, modify it, share it or just plain ignore it!
Thx!

*/

#include "AccelStepper.h" // AccelStepper Library
#include "U8glib.h"  // U8glib for Nokia LCD

// Variables to hold entered number on Keypad
volatile int firstnumber=99;  // used to tell how many numbers were entered on keypad
volatile int secondnumber=99;
volatile int thirdnumber=99;
volatile int run_time=5;
volatile int speed=50;
volatile int screen=0;
bool busy = false;

// Variables to hold Distance and CurrentPosition
int keyfullnumber=0;  // used to store the final calculated distance value
String currentposition = "";  // Used for display on Nokia LCD

// U8glib Setup for I2C 12864 OLED
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);
                                    //SDA = A4, SCL = A5
                                    
                                    
// AccelStepper Setup
AccelStepper stepper(1, A0, A1);  // 1 = Easy Driver interface
                                  // Arduino A0 connected to STEP pin of Easy Driver
                                  // Arduino A1 connected to DIR pin of Easy Driver
                                  
#define EncCLK 2
#define EncDT 1
#define EncSW 3

void readEncoder() {
   if (screen == 1){ 
      if (digitalRead(EncDT) == false) {
         run_time++;
         Serial.print("run_time = ");
         Serial.println(run_time);
      }
      if (digitalRead(EncDT) == true) {
         run_time--;
         Serial.print("run_time = ");
         Serial.println(run_time);
         if (run_time<=0) run_time = 1;
      }
   }
   if (screen == 2){
      if (digitalRead(EncDT) == false) {
         speed++;
         Serial.print("speed = ");
         Serial.println(speed);
         if (speed>=21) speed = 20; 
      }
      if (digitalRead(EncDT) == true) {
         speed--;
         Serial.print("speed = ");
         Serial.println(speed);
         if (speed<=0) speed = 1; 
      }
   }
}

void readSwitch() {
   if (screen < 3) screen++;
   if (screen == 3) {
      //stepper.setMaxSpeed(speed*100);
      screen++;
      //busy = true;
   }
   if (screen == 4) {
      screen--;
      //busy = false;
   }
   //displayscreen();
   Serial.println(screen);
}

void setup(void) {
  
  //  AccelStepper speed and acceleration setup
  stepper.setMaxSpeed(1500);  // Not to fast or you will have missed steps
  stepper.setAcceleration(400);  //  Same here

  pinMode (EncCLK,INPUT);
  pinMode (EncDT,INPUT);
  pinMode (EncSW,INPUT_PULLUP);

  attachInterrupt(digitalPinToInterrupt(EncCLK), readEncoder, FALLING );
  attachInterrupt(digitalPinToInterrupt(EncSW), readSwitch, FALLING );

  Serial.begin(9600);
}


void loop(){
  
  //Nothing

}

//movestepper(keyfullnumber);
/*
void movestepper(int z) {  //  Move the stepper

  int calculatedmove=((z*1600)/80);  //  Calculate number of steps needed in mm
  stepper.runToNewPosition(calculatedmove);
  currentposition = String(z);
  u8g.firstPage();
  do {
    u8g.drawHLine(0, 15, 84);
    u8g.drawVLine(50, 16, 38);
    u8g.drawHLine(0, 35, 84); 
    u8g.setFont(u8g_font_profont11);
    u8g.drawStr(0, 10, "ENTER DISTANCE");
    u8g.drawStr(62, 29, "MM");
    u8g.drawStr(4, 46, "cur-pos");
    u8g.setPrintPos(57,47);
    u8g.print(currentposition);       
  }
  while( u8g.nextPage() ); 
}
                
void resetnumbers() {  // Reset numbers for next entry
  firstnumber=99;
  secondnumber=99;
  thirdnumber=99;
} 
  

void drawnokiascreen(String y) {

    u8g.firstPage();
    do {
      u8g.drawHLine(0, 15, 84);
      u8g.drawVLine(50, 16, 38);
      u8g.drawHLine(0, 35, 84); 
      u8g.setFont(u8g_font_profont11);
      u8g.drawStr(0, 10, "ENTER DISTANCE");
      u8g.setPrintPos(0,29);
      u8g.print(y);  // Put entered number on Nokia lcd    
      u8g.drawStr(62, 29, "MM");
      u8g.drawStr(4, 46, "cur-pos");
      u8g.setPrintPos(57,47); 
      u8g.print(currentposition);  //  Display current position of stepper
    }
      while( u8g.nextPage() );

}*/