7 segment led + RTC

gistfile1.txt

//ADDED 24 JULY 2017


int segA = 11; // top
int segB = 7; // right-top
int segF = 10; // left-top

int segD = 2; // bottom
int segE = 1; // left-bottom
int segC = 4; // right-bottom
int segG = 5; // middle

int digit1 = 14; // common cathode for digit1 (i.e. A0)
int digit2 = 15; // common cathode for digit2 (i.e. A1)
int digit3 = 16; // common cathode for digit3 (i.e. A2)
int digit4 = 17; // common cathode for digit4 (i.e. A3)

// Number to display
static int number = 0;
static int ms = 0;


//this part for clock
#define DS3231_I2C_ADDRESS 0x68
#include "Wire.h"
// 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) );
}
//this part for clock



 
void setup() {
  // put your setup code here, to run once:

    // All pins in digital mode
    pinMode(digit1, OUTPUT);
    pinMode(digit2, OUTPUT);
    pinMode(digit3, OUTPUT);
    pinMode(digit4, OUTPUT);
 
    pinMode(segA, OUTPUT);
    pinMode(segB, OUTPUT);
    pinMode(segC, OUTPUT);
    pinMode(segD, OUTPUT);
    pinMode(segE, OUTPUT);
    pinMode(segF, OUTPUT);
    pinMode(segG, OUTPUT);



    //clock part
      Wire.begin();
//  Serial.begin(9600); tak tau kenapa, tapi kalau biarkan gak nnti akan kacau led display

}



void loop() {
  // put your main code here, to run repeatedly:


int hour = returnHour();

// kalau number of hours more than 12, kene tolak 12. hanya boleh cater 1 digit
if (hour >= 12){
  hour = hour - 12;
}

int totalminute = returnMinute();
int firstminute = (totalminute ) % 10 ;
int secondminute = (totalminute / 10) % 10 ;


    digitalWrite(digit1, LOW);
        // light on segments for 'thousands'
        drawDigitFast( hour );
        // wait 2 ms
        delay(2);
        // turn off all segments
        drawDigitFast( -1 );
    // turn off cathode for digit1
    digitalWrite(digit1, HIGH);
 
    digitalWrite(digit2, LOW);
        drawDigitFast( (number/100) % 10 );
        delay(2);
        drawDigitFast( -1 );
    digitalWrite(digit2, HIGH);
 
    digitalWrite(digit3, LOW);
        drawDigitFast( secondminute );
        delay(2);
        drawDigitFast( -1 );
    digitalWrite(digit3, HIGH);
 
    digitalWrite(digit4, LOW);
        drawDigitFast( firstminute );
        delay(2);
        drawDigitFast( -1 );
    digitalWrite(digit4, HIGH);


}

void drawDigitFast(int n)
{
    const byte aPins[8] = {
        segA, segB, segC, segD, segE, segF, segG
    };
    const byte aSegments[11][8] = {
        //  A     B     C     D     E     F     G
        { HIGH, HIGH, HIGH, HIGH, HIGH, HIGH,  LOW }, // 0
        {  LOW, HIGH, HIGH,  LOW,  LOW,  LOW,  LOW }, // 1
        { HIGH, HIGH,  LOW, HIGH, HIGH,  LOW, HIGH }, // 2
        { HIGH, HIGH, HIGH, HIGH,  LOW,  LOW, HIGH }, // 3
        {  LOW, HIGH, HIGH,  LOW,  LOW, HIGH, HIGH }, // 4
        { HIGH,  LOW, HIGH, HIGH,  LOW, HIGH, HIGH }, // 5
        { HIGH,  LOW, HIGH, HIGH, HIGH, HIGH, HIGH }, // 6
        { HIGH, HIGH, HIGH,  LOW,  LOW,  LOW, LOW  }, // 7
        { HIGH, HIGH, HIGH, HIGH, HIGH, HIGH, HIGH }, // 8
        { HIGH, HIGH, HIGH, HIGH,  LOW, HIGH, HIGH }, // 9
        {  LOW,  LOW,  LOW,  LOW,  LOW,  LOW,  LOW }  // all off
    };
 
    if( n < 0 || n > 10 )
    {
        n = 10;
    }
 
    for( int i = 0; i < 7; i++ )
    {
        digitalWrite( aPins[i], aSegments[n][i] );
    }
}



// void function for clock
void setDS3231time(byte second, byte minute, byte hour, byte dayOfWeek, byte
dayOfMonth, byte month, byte year){
  // sets time and date data to DS3231
  Wire.beginTransmission(DS3231_I2C_ADDRESS);
  Wire.write(0); // set next input to start at the seconds register
  Wire.write(decToBcd(second)); // set seconds
  Wire.write(decToBcd(minute)); // set minutes
  Wire.write(decToBcd(hour)); // set hours
  Wire.write(decToBcd(dayOfWeek)); // set day of week (1=Sunday, 7=Saturday)
  Wire.write(decToBcd(dayOfMonth)); // set date (1 to 31)
  Wire.write(decToBcd(month)); // set month
  Wire.write(decToBcd(year)); // set year (0 to 99)
  Wire.endTransmission();
}
void readDS3231time(byte *second,
byte *minute,
byte *hour,
byte *dayOfWeek,
byte *dayOfMonth,
byte *month,
byte *year){
  Wire.beginTransmission(DS3231_I2C_ADDRESS);
  Wire.write(0); // set DS3231 register pointer to 00h
  Wire.endTransmission();
  Wire.requestFrom(DS3231_I2C_ADDRESS, 7);
  // request seven bytes of data from DS3231 starting from register 00h
  *second = bcdToDec(Wire.read() & 0x7f);
  *minute = bcdToDec(Wire.read());
  *hour = bcdToDec(Wire.read() & 0x3f);
  *dayOfWeek = bcdToDec(Wire.read());
  *dayOfMonth = bcdToDec(Wire.read());
  *month = bcdToDec(Wire.read());
  *year = bcdToDec(Wire.read());
}


void displayTime(){
  byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
  // retrieve data from DS3231
  readDS3231time(&second, &minute, &hour, &dayOfWeek, &dayOfMonth, &month,
  &year);
  // send it to the serial monitor
  Serial.print(hour, DEC);
  // convert the byte variable to a decimal number when displayed
  Serial.print(":");
  if (minute<10){
    Serial.print("0");
  }
  Serial.print(minute, DEC);
  Serial.print(":");
  if (second<10){
    Serial.print("0");
  }
  Serial.print(second, DEC);
  Serial.print(" ");
  Serial.print(dayOfMonth, DEC);
  Serial.print("/");
  Serial.print(month, DEC);
  Serial.print("/");
  Serial.print(year, DEC);
  Serial.print(" Day of week: ");
  switch(dayOfWeek){
  case 1:
    Serial.println("Sunday");
    break;
  case 2:
    Serial.println("Monday");
    break;
  case 3:
    Serial.println("Tuesday");
    break;
  case 4:
    Serial.println("Wednesday");
    break;
  case 5:
    Serial.println("Thursday");
    break;
  case 6:
    Serial.println("Friday");
    break;
  case 7:
    Serial.println("Saturday");
    break;
  }
}


int returnHour(){
  byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
  // retrieve data from DS3231
  readDS3231time(&second, &minute, &hour, &dayOfWeek, &dayOfMonth, &month,
  &year);
  // send it to the serial monitor
//  Serial.print(hour, DEC);
  return hour;
}

int returnMinute(){
  byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
  // retrieve data from DS3231
  readDS3231time(&second, &minute, &hour, &dayOfWeek, &dayOfMonth, &month,
  &year);
  // send it to the serial monitor
//  Serial.print(hour, DEC);
  return minute;
}