Real Time Clock para Arduino
Pequeño tutorial para hacer funcionar un reloj tiempo real que utilizo para mi arduino.El modelo es Tiny RTC I2C Modules y es el de la foto.
Como pueden ver, la batería es recargable.
La conexión es la siguiente:
| RTC | Arduino |
| GND | GND |
| VCC | +5V |
| SDA | A4 |
| SCL | A5 |
| BAT | +3.3v |
Código:
Poner la hora
- /* Downloaded from http://projectsfromtech.blogspot.com/
- *Connect SCL, SDA, Vcc, and GND
- *Set date in function below.
- *Upload and enjoy!
- */
- //Arduino 1.0+ Only
- #include "Wire.h"
- #define DS1307_ADDRESS 0x68
- byte zero = 0x00; //workaround for issue #527
- void setup(){
- Wire.begin();
- Serial.begin(9600);
- setDateTime(); //MUST CONFIGURE IN FUNCTION
- }
- void loop(){
- printDate();
- delay(1000);
- }
- void setDateTime(){
- byte second = 00; //0-59
- byte minute = 37; //0-59
- byte hour = 23; //0-23
- byte weekDay = 1; //1-7
- byte monthDay = 30; //1-31
- byte month = 7; //1-12
- byte year = 14; //0-99
- Wire.beginTransmission(DS1307_ADDRESS);
- Wire.write(zero); //stop Oscillator
- Wire.write(decToBcd(second));
- Wire.write(decToBcd(minute));
- Wire.write(decToBcd(hour));
- Wire.write(decToBcd(weekDay));
- Wire.write(decToBcd(monthDay));
- Wire.write(decToBcd(month));
- Wire.write(decToBcd(year));
- Wire.write(zero); //start
- Wire.endTransmission();
- }
- byte decToBcd(byte val){
- // Convert normal decimal numbers to binary coded decimal
- return ( (val/10*16) + (val%10) );
- }
- byte bcdToDec(byte val) {
- // Convert binary coded decimal to normal decimal numbers
- return ( (val/16*10) + (val%16) );
- }
- void printDate(){
- // Reset the register pointer
- Wire.beginTransmission(DS1307_ADDRESS);
- Wire.write(zero);
- Wire.endTransmission();
- Wire.requestFrom(DS1307_ADDRESS, 7);
- int second = bcdToDec(Wire.read());
- int minute = bcdToDec(Wire.read());
- int hour = bcdToDec(Wire.read() & 0b111111); //24 hour time
- int weekDay = bcdToDec(Wire.read()); //0-6 -> sunday - Saturday
- int monthDay = bcdToDec(Wire.read());
- int month = bcdToDec(Wire.read());
- int year = bcdToDec(Wire.read());
- //print the date EG 3/1/11 23:59:59
- Serial.print(month);
- Serial.print("/");
- Serial.print(monthDay);
- Serial.print("/");
- Serial.print(year);
- Serial.print(" ");
- Serial.print(hour);
- Serial.print(":");
- Serial.print(minute);
- Serial.print(":");
- Serial.println(second);
- }
Obtener la hora
- /* Downloaded from http://projectsfromtech.blogspot.com/
- *Connect SCL, SDA, Vcc, and GND
- *Open Serial Monitor and enjoy!
- */
- //Arduino 1.0+ Only
- #include "Wire.h"
- #define DS1307_ADDRESS 0x68
- void setup(){
- Wire.begin();
- Serial.begin(9600);
- }
- void loop(){
- printDate();
- delay(1000);
- }
- byte bcdToDec(byte val) {
- // Convert binary coded decimal to normal decimal numbers
- return ( (val/16*10) + (val%16) );
- }
- void printDate(){
- // Reset the register pointer
- Wire.beginTransmission(DS1307_ADDRESS);
- byte zero = 0x00;
- Wire.write(zero);
- Wire.endTransmission();
- Wire.requestFrom(DS1307_ADDRESS, 7);
- int second = bcdToDec(Wire.read());
- int minute = bcdToDec(Wire.read());
- int hour = bcdToDec(Wire.read() & 0b111111); //24 hour time
- int weekDay = bcdToDec(Wire.read()); //0-6 -> sunday - Saturday
- int monthDay = bcdToDec(Wire.read());
- int month = bcdToDec(Wire.read());
- int year = bcdToDec(Wire.read());
- //print the date EG 3/1/11 23:59:59
- Serial.print(month);
- Serial.print("/");
- Serial.print(monthDay);
- Serial.print("/");
- Serial.print(year);
- Serial.print(" ");
- Serial.print(hour);
- Serial.print(":");
- Serial.print(minute);
- Serial.print(":");
- Serial.println(second);
- }
Bug:
Muestra una fecha invalida como 7/31/14 2:27:36
posted by Cristian Marquez Russo @ July 01, 2014
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