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Klasse Date von RTC8563 ableiten
Das UML Diagramm zeigt die Ableitung der Klasse Date von der Basisklasse RTC8563
Die Klasse Date erbt alle Membervariable (i2c) und Methoden (rtc_read, ...) von der Basisklasse RTC8563:
Die Klassendeklaration erfolgt in Date.h:
class Date : public RTC8563
{
private:
uint8_t bcdToUint(uint8_t const nybbles); // Methode
public:
Date() {} // Standardkonstruktor
uint8_t GetDay(); // Methode
};
Die Definition der Methoden in der Klasse Date.cpp:
uint8_t Date::bcdToUint(uint8_t const nybbles) // Wandelt BCD-Wert in Integer um
{
uint8_t result;
result = (nybbles >> 4) * 10 + (nybbles & 0x0F);
return result;
}
uint8_t Date :: GetDay()
{
uint8_t s = rtc_read(DAYS);
return bcdToUint(s&0x3F);
}