Arduino Firmware of my Table Saw Box Joint Jig

Firmware.ino

#include <EEPROM.h>
#include <LiquidCrystal.h>
#include <Button.h>        //https://github.com/carlynorama/Arduino-Library-Button
#include <AccelStepper.h>  //http://www.open.com.au/mikem/arduino/AccelStepper/

#define STEPS_MM 486
#define MAX_SPEED 800
#define ACCELERATION 4000
#define ZERO_SPEED 400

#define MODE_CUT 0
#define MODE_ZERO 1
#define MODE_SET_BLADE_WIDTH 2
#define MODE_SET_BLADE_ZERO 3

AccelStepper stepper(1, 3, 2);
LiquidCrystal lcd(9, 8, 13, 12, 11, 10);
Button zero(7, LOW);
Button up(6, LOW);
Button ok(5, LOW);
Button down(4, LOW);

boolean changed = false;
int mode = 1;
int cutstep = 0;
float bladewidth = 0;
float bladezero = 10;
boolean zeromove = false;

/**************************************************************/
void setup(){
  Serial.begin(9600);
  Serial.println("ACTSBJJ");
  stepper.setMaxSpeed(MAX_SPEED);
  stepper.setAcceleration(ACCELERATION);
  lcd.begin(16, 2);
  lcd.print("ACTSBJJ");
  digitalWrite(7, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(4, HIGH);
  delay(1000);
  readBladeWidthFromEEPROM();
  readBladeZeroFromEEPROM();
  displayMode();
}
//---------------------
void loop(){
  zero.listen();
  up.listen();
  ok.listen();
  down.listen();

  if(zero.onPress()) handleZero();
  if(zeromove){
    stepper.runSpeed();
    return;
  }
  if(stepper.run()) return;

  if(ok.onPress()) handleOk();
  if(up.onPress()) handleUp();
  if(down.onPress()) handleDown();
  if(up.isHold()) handleUpHold();
  if(down.isHold()) handleDownHold();
}
//---------------------
void moveTo(float mmpos){
  stepper.moveTo(mmpos * STEPS_MM);
}
void moveStep(){
  moveTo(cutstep*bladewidth+bladezero);
}
/**************************************************************/
void handleZero(){
  zeromove = false;
  stepper.setCurrentPosition(0);
  moveTo(bladezero);
  cutstep = 0;
  displayMode();
}
void handleOk(){
  if(mode == MODE_SET_BLADE_WIDTH && changed) writeBladeWidthToEEPROM();
  if(mode == MODE_SET_BLADE_ZERO && changed) writeBladeZeroToEEPROM();
  changed = false;
  mode = (mode+1)%4;
  displayMode();
}
//---------------------
void handleUp(){
  switch(mode){
  case MODE_CUT:
    cutstep ++;
    moveStep();
    break;
  case MODE_ZERO:
    break;
  case MODE_SET_BLADE_WIDTH:
    bladewidth += 0.01;
    break;
  case MODE_SET_BLADE_ZERO:
    bladezero += 0.01;
    moveStep();
    break;
  }
  changed = true;
  displayUpdate();
}
//---------------------
void handleDown(){
  switch(mode){
  case MODE_CUT:
    if(cutstep > 0) cutstep --;
    moveStep();
    break;
  case MODE_ZERO:
    stepper.setSpeed(-ZERO_SPEED);
    zeromove = true;
    break;
  case MODE_SET_BLADE_WIDTH:
    if(bladewidth > 0) bladewidth -= 0.01;
    break;
  case MODE_SET_BLADE_ZERO:
    if(bladezero > 2) bladezero -= 0.01;
    moveStep();
    break;
  }
  changed = true;
  displayUpdate();
}
//---------------------
void handleUpHold(){
  switch(mode){
  case MODE_SET_BLADE_WIDTH:
    bladewidth += 0.01;
    break;
  case MODE_SET_BLADE_ZERO:
    bladezero += 0.01;
    moveStep();
    break;
  }
  changed = true;
  displayUpdate();
}
//---------------------
void handleDownHold(){
  switch(mode){
  case MODE_SET_BLADE_WIDTH:
    if(bladewidth > 0) bladewidth -= 0.01;
    break;
  case MODE_SET_BLADE_ZERO:
    if(bladezero > 2) bladezero -= 0.01;
    moveStep();
    break;
  }
  changed = true;
  displayUpdate();
}
//---------------------
void displayMode(){
  lcd.clear();
  switch(mode){
  case MODE_CUT:
    lcd.print("Cut");
    lcd.setCursor(0, 1);
    lcd.print("Step: ");
    lcd.print(cutstep);
    break;
  case MODE_ZERO:
    lcd.print("Set zero");
    lcd.setCursor(0, 1);
    lcd.print("> Press down");
    break;
  case MODE_SET_BLADE_WIDTH:
    lcd.print("Blade width");
    lcd.setCursor(0, 1);
    lcd.print(bladewidth);
    lcd.print(" mm");
    break;
  case MODE_SET_BLADE_ZERO:
    lcd.print("Blade zero");
    lcd.setCursor(0, 1);
    lcd.print(bladezero);
    lcd.print(" mm");
    break;
  }
}
//---------------------
void displayUpdate(){
  switch(mode){
  case MODE_CUT:
    lcd.setCursor(6, 1);
    lcd.print(cutstep);
    lcd.print("      ");
    break;
  case MODE_ZERO:
    if(zeromove){
      lcd.clear();
      lcd.print("Setting zero...");
    }
    break;
  case MODE_SET_BLADE_WIDTH:
    lcd.setCursor(0, 1);
    lcd.print(bladewidth);
    lcd.print(" mm      ");
    break;
  case MODE_SET_BLADE_ZERO:
    lcd.setCursor(0, 1);
    lcd.print(bladezero);
    lcd.print(" mm      ");
    break;
  }
}
/**************************************************************/
void readBladeWidthFromEEPROM(){
  int b = (int)EEPROM.read(0) << 8 | (int)EEPROM.read(1);
  bladewidth = (float)b/100;
}
void writeBladeWidthToEEPROM(){
  int b = bladewidth*100;
  EEPROM.write(0, (byte)(b >> 8));
  EEPROM.write(1, (byte)b);
}
//---------------------
void readBladeZeroFromEEPROM(){
  int b = (int)EEPROM.read(2) << 8 | (int)EEPROM.read(3);
  bladezero = max((float)b/100, 2);
}
void writeBladeZeroToEEPROM(){
  int b = bladezero*100;
  EEPROM.write(2, (byte)(b >> 8));
  EEPROM.write(3, (byte)b);
}