Anleitung zur binären Armbanduhr

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#include <TinyWireM.h>
#include <avr/sleep.h>
#include <avr/interrupt.h>
#define RV3029 0xAC/2
#define STR2BCD_ERROR 0xff

#define LED1 2
#define LED2 5
#define LED3 6
#define LED4 7

#define LAYER1 8
#define LAYER2 9
#define LAYER3 10
#define LAYER4 11

#define LIGHTSON 4
#define MINUTESBUTTON 3
#define HOURSBUTTON 1

byte stunde = 11;
byte minute = 41;
byte sekunde = 15;

int m;

void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(LAYER1, OUTPUT); //must be low to open ground
  pinMode(LAYER2, OUTPUT); //must be low to open ground
  pinMode(LAYER3, OUTPUT); //must be low to open ground
  pinMode(LAYER4, OUTPUT); //must be low to open ground

  pinMode(LIGHTSON, INPUT);
  pinMode(MINUTESBUTTON, INPUT);
  pinMode(HOURSBUTTON, INPUT);

  digitalWrite(LAYER1, HIGH);
  digitalWrite(LAYER2, HIGH);
  digitalWrite(LAYER3, HIGH);
  digitalWrite(LAYER4, HIGH);
  digitalWrite(LIGHTSON, HIGH);
  TinyWireM.begin();
  TinyWireM.beginTransmission(RV3029);
  TinyWireM.send(0x02);
  TinyWireM.send(0x00);
  TinyWireM.send(0x00);
  TinyWireM.endTransmission();
  
  attachInterrupt(0, wakeUpNow, LOW); 
  
  setTime();
  getTime();
}

void sleepNow(){
    set_sleep_mode(SLEEP_MODE_PWR_DOWN);
    sleep_enable();
    attachInterrupt(0,wakeUpNow, LOW);
    ACSR |= _BV(ACD);
    MCUCR |= _BV(7) | _BV(2);
    //sleep_mode();
    digitalWrite(LAYER1, LOW);
  digitalWrite(LAYER2, LOW);
  digitalWrite(LAYER3, LOW);
  digitalWrite(LAYER4, LOW);
    sleep_cpu();
    sleep_disable();
    detachInterrupt(0); 
}

void wakeUpNow(){
  digitalWrite(LAYER1, HIGH);
  digitalWrite(LAYER2, HIGH);
  digitalWrite(LAYER3, HIGH);
  digitalWrite(LAYER4, HIGH);
}

void loop () {
//  if(digitalRead(LIGHTSON)==LOW){
//    delay(2);
//    if(digitalRead(LIGHTSON)==LOW){
      getTime();
      for(m=0; m<300; m++){
        setLEDS();
        boolean temp = getButtons();
        if(temp || !digitalRead(LIGHTSON)){
          m=0;
        }
      }
//    }
//  }
sleepNow();
}

void getTime(){
  TinyWireM.beginTransmission(RV3029);
  TinyWireM.send(0x08);
  TinyWireM.endTransmission();
  TinyWireM.requestFrom(RV3029, 3);
  sekunde = bcdToDec(TinyWireM.receive())& 0x7f;
  minute = bcdToDec(TinyWireM.receive())& 0x7f;
  stunde = bcdToDec(TinyWireM.receive())& 0x3f;
}

void setTime(){
  TinyWireM.beginTransmission(RV3029);
  TinyWireM.send(0x08);
  TinyWireM.send(decToBcd(sekunde));
  TinyWireM.send(decToBcd(minute));
  TinyWireM.send(decToBcd(stunde));
  TinyWireM.endTransmission();
}

boolean getButtons(){
  boolean temp = false;
  if(digitalRead(MINUTESBUTTON)==HIGH){
    delay(2);
    if(digitalRead(MINUTESBUTTON)==HIGH){
      incMinutes();
      delay(10);
      while(digitalRead(MINUTESBUTTON)){

      }
      temp = true;
    }
  }
  if(digitalRead(HOURSBUTTON)==HIGH){
    delay(2);
    if(digitalRead(HOURSBUTTON)==HIGH){
      incHours();
      delay(10);
      while(digitalRead(HOURSBUTTON)){

      }
      temp = true;
    }
  }
  return temp;
}

void incMinutes(){
  if(minute+1>=60){    
    minute=0;
  } 
  else {
    minute++;
  }
  setTime();
}

void incHours(){
  if(stunde+1>=24){
    stunde=0;
  } 
  else {
    stunde++;
  }
  setTime();
}

// Convert normal decimal numbers to binary coded decimal
byte decToBcd(byte val)
{
  return ( (val/10*16) + (val%10) );
}

// Convert binary coded decimal to normal decimal numbers
byte bcdToDec(byte val)
{
  return ( (val/16*10) + (val%16) );
}

void setLEDS(){
  //layer1
  digitalWrite(LAYER1, LOW);
  digitalWrite(LED1, bitRead(stunde/10, 0));
  digitalWrite(LED2, bitRead(stunde%10, 0));
  digitalWrite(LED3, bitRead(minute/10, 0));
  digitalWrite(LED4, bitRead(minute%10, 0));
  waitTwoMillis(); //wait before kill power, because the last LED column get not as bright as the other ones
  digitalWrite(LAYER1, HIGH);
  clearLEDS();

  //layer2
  digitalWrite(LAYER2, LOW);
  digitalWrite(LED1, bitRead(stunde/10, 1));
  digitalWrite(LED2, bitRead(stunde%10, 1));
  digitalWrite(LED3, bitRead(minute/10, 1));
  digitalWrite(LED4, bitRead(minute%10, 1));
  waitTwoMillis();
  digitalWrite(LAYER2, HIGH);
  clearLEDS();

  //layer3
  digitalWrite(LAYER3, LOW);
  digitalWrite(LED2, bitRead(stunde%10, 2));
  digitalWrite(LED3, bitRead(minute/10, 2));
  digitalWrite(LED4, bitRead(minute%10, 2));
  waitTwoMillis();
  digitalWrite(LAYER3, HIGH);
  clearLEDS();

  //layer4
  digitalWrite(LAYER4, LOW);
  digitalWrite(LED2, bitRead(stunde%10, 3));
  digitalWrite(LED4, bitRead(minute%10, 3));
  waitTwoMillis();
  digitalWrite(LAYER4, HIGH);
  clearLEDS();
}

void clearLEDS(){
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
  digitalWrite(LED4, LOW);
}

void waitTwoMillis(){
  delay(2);
}