odometer

counter_5_with_save.ino

#include <EEPROM.h>

#include <LiquidCrystal.h>

const int addr = 0;


const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);


const int  buttonPin = 7;    // the pin that the odometer is attached to
      

long int buttonPushCounter = 0;   // counter for the number of revolutions
int buttonState = 0;         // current state of the button
int lastButtonState = 0;     // previous state of the button

void setup() {

  lcd.begin(16, 2);
  
  // initialize the button pin as a input:
  pinMode(buttonPin, INPUT_PULLUP);

  //Serial.begin(9600);
 
  buttonPushCounter = EEPROM.read(addr); // disable this to reset odometer to 0
}


void loop() {


   
  // read the pushbutton input pin:
  buttonState = digitalRead(buttonPin);

  // compare the buttonState to its previous state
  if (buttonState != lastButtonState) {
    // if the state has changed, increment the counter
    if (buttonState == LOW) {
      // if the current state is HIGH then the button went from off to on:
      buttonPushCounter++;


lcd.print(buttonPushCounter);

lcd.setCursor(0, 16);

lcd.print(buttonPushCounter *0.002167);

lcd.print(" kilometres");

lcd.setCursor(0, 0); 
   
                                                                                              //Serial.print("step ");
                                                                                              //Serial.print(buttonPushCounter);
                                                                                              //Serial.print("      ");
                                                                                              //Serial.print(buttonPushCounter * 0.002167); 
                                                                                              //Serial.println("km");
   //Serial.print(buttonPushCounter); //Makes onboard Tx signal flash
                                                                                           
    } 

  }
  // save the current state as the last state, for next time through the loop
  lastButtonState = buttonState;


  
   EEPROM.update(addr, buttonPushCounter);   // stores the step value (I dont think I'm storing
                                            // the data properly!!!) Loses its place when
                                            // buttonPushCounter > 256 approx...
   
  //addr = addr + 1;                        //dont know what this does....
  //if (addr == EEPROM.length()) {
  //addr = 0;
  
  }
}