I have a code :Arduino real time clock with DS1307
#include <LiquidCrystal.h>
// include Wire library code (needed for I2C protocol devices)
#include <Wire.h>
// LCD module connections (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
void setup() {
pinMode(8, INPUT_PULLUP); // button1 is connected to pin 8
pinMode(9, INPUT_PULLUP); // button2 is connected to pin 9
// set up the LCD's number of columns and rows
lcd.begin(16, 2);
Wire.begin(); // Join i2c bus
}
char Time[] = "TIME: : : ";
char Calendar[] = "DATE: / /20 ";
byte i, second, minute, hour, date, month, year;
void DS1307_display(){
// Convert BCD to decimal
second = (second >> 4) * 10 + (second & 0x0F);
minute = (minute >> 4) * 10 + (minute & 0x0F);
hour = (hour >> 4) * 10 + (hour & 0x0F);
date = (date >> 4) * 10 + (date & 0x0F);
month = (month >> 4) * 10 + (month & 0x0F);
year = (year >> 4) * 10 + (year & 0x0F);
// End conversion
Time[12] = second % 10 + 48;
Time[11] = second / 10 + 48;
Time[9] = minute % 10 + 48;
Time[8] = minute / 10 + 48;
Time[6] = hour % 10 + 48;
Time[5] = hour / 10 + 48;
Calendar[14] = year % 10 + 48;
Calendar[13] = year / 10 + 48;
Calendar[9] = month % 10 + 48;
Calendar[8] = month / 10 + 48;
Calendar[6] = date % 10 + 48;
Calendar[5] = date / 10 + 48;
lcd.setCursor(0, 0);
lcd.print(Time); // Display time
lcd.setCursor(0, 1);
lcd.print(Calendar); // Display calendar
}
void blink_parameter(){
byte j = 0;
while(j < 10 && digitalRead(8) && digitalRead(9)){
j++;
delay(25);
}
}
byte edit(byte x, byte y, byte parameter){
char text[3];
while(!digitalRead(8)); // Wait until button (pin #8) released
while(true){
while(!digitalRead(9)){ // If button (pin #9) is pressed
parameter++;
if(i == 0 && parameter > 23) // If hours > 23 ==> hours = 0
parameter = 0;
if(i == 1 && parameter > 59) // If minutes > 59 ==> minutes = 0
parameter = 0;
if(i == 2 && parameter > 31) // If date > 31 ==> date = 1
parameter = 1;
if(i == 3 && parameter > 12) // If month > 12 ==> month = 1
parameter = 1;
if(i == 4 && parameter > 99) // If year > 99 ==> year = 0
parameter = 0;
sprintf(text,"%02u", parameter);
lcd.setCursor(x, y);
lcd.print(text);
delay(200); // Wait 200ms
}
lcd.setCursor(x, y);
lcd.print(" "); // Display two spaces
blink_parameter();
sprintf(text,"%02u", parameter);
lcd.setCursor(x, y);
lcd.print(text);
blink_parameter();
if(!digitalRead(8)){ // If button (pin #8) is pressed
i++; // Increament 'i' for the next parameter
return parameter; // Return parameter value and exit
}
}
}
void loop() {
if(!digitalRead(8)){ // If button (pin #8) is pressed
i = 0;
hour = edit(5, 0, hour);
minute = edit(8, 0, minute);
date = edit(5, 1, date);
month = edit(8, 1, month);
year = edit(13, 1, year);
// Convert decimal to BCD
minute = ((minute / 10) << 4) + (minute % 10);
hour = ((hour / 10) << 4) + (hour % 10);
date = ((date / 10) << 4) + (date % 10);
month = ((month / 10) << 4) + (month % 10);
year = ((year / 10) << 4) + (year % 10);
// End conversion
// Write data to DS1307 RTC
Wire.beginTransmission(0x68); // Start I2C protocol with DS1307 address
Wire.write(0); // Send register address
Wire.write(0); // Reset sesonds and start oscillator
Wire.write(minute); // Write minute
Wire.write(hour); // Write hour
Wire.write(1); // Write day (not used)
Wire.write(date); // Write date
Wire.write(month); // Write month
Wire.write(year); // Write year
Wire.endTransmission(); // Stop transmission and release the I2C bus
delay(200); // Wait 200ms
}
Wire.beginTransmission(0x68); // Start I2C protocol with DS1307 address
Wire.write(0); // Send register address
Wire.endTransmission(false); // I2C restart
Wire.requestFrom(0x68, 7); // Request 7 bytes from DS1307 and release I2C bus at end of reading
second = Wire.read(); // Read seconds from register 0
minute = Wire.read(); // Read minuts from register 1
hour = Wire.read(); // Read hour from register 2
Wire.read(); // Read day from register 3 (not used)
date = Wire.read(); // Read date from register 4
month = Wire.read(); // Read month from register 5
year = Wire.read(); // Read year from register 6
DS1307_display(); // Diaplay time & calendar
delay(50); // Wait 50ms
}
Everybody can help me change "use Button in this code" to " use Keypad 4*4". Thanks all! 