Franz Pucher / HIM0Board

FSST - Hardwarenahe Programmierung

RTC Methodendefinition

Klassendesign PCF8563

An dieser Stelle erfolgt das Kopieren der Funktionen aus der main-Datei, außer printTime() in main wird ersetzt durch den Code aus der Funktion printTime():

//
//  @ Project : RTC Date Time Clock
//  @ File Name : RTC8563.cpp
//  @ Date : 06.04.2015
//  @ Author : Franz Pucher
//  @ Copyright : pe@bulme.at
//

#include "mbed.h"
#include "const.h"

#include "RTC8563.h"

RTC8563::RTC8563() : i2c(p28, p27)  // delete void and add call to base constructor 
{
    // Initialise I2C
    i2c.frequency(40000);              
    char init1[2] = {0x6, 0x00};
    char init2[2] = {0x7, 0xff};
    i2c.write(0x40, init1, 2);
    i2c.write(0x40, init2, 2);
}

RTC8563::RTC8563(PinName sda, PinName scl) : i2c(sda, scl) 
{
   // Initialise I2C
    i2c.frequency(40000);              
    char init1[2] = {0x6, 0x00};
    char init2[2] = {0x7, 0xff};
    i2c.write(0x40, init1, 2);
    i2c.write(0x40, init2, 2);
}

char RTC8563::rtc_read(char address)
{
    char value;
    i2c.start();
    i2c.write(RTC8563_ADR);
    i2c.write(address);
    i2c.start();
    i2c.write(RTC8563_ADR | _READ);
    value = i2c.read(0);
    i2c.stop();

    return value;
}

void RTC8563::rtc_write(char address, char value)
{
    i2c.start();
    i2c.write(RTC8563_ADR);
    i2c.write(address);
    i2c.write(value);
    i2c.stop();
}

void RTC8563::rtc_init()
{
}

void RTC8563::rtc_alarm()
{
}

Die Main-Funktion hat somit folgendes aussehen:

#include "mbed.h"
#include "const.h"
#include "RTC8563.h"
#include "string"

Serial pc(USBTX, USBRX);
//I2C i2c(p28, p27);

uint8_t year, month, day, week;
uint8_t hour, minute, sec;
char week_chr[7][4] = {"MON","TUE","WED","THU","FRI","SAT","SUN"};

int main()
{
    RTC8563 rtc;  // instanziieren des Objektes rtc

    pc.printf("Setting up RTC\n");
    //rtc.rtc_init();

    while(1) {
        //printTime();           
        year = rtc.rtc_read(YEARS);   // Aufruf der Methode rtc_read der Instanz (Objekt) rtc
        month = rtc.rtc_read(MONTHS);
        day = rtc.rtc_read(DAYS);
        week = rtc.rtc_read(WEEKDAYS);
        hour = rtc.rtc_read(HOURS);
        minute = rtc.rtc_read(MINUTES);
        sec = rtc.rtc_read(SECONDS);

        //Datum Ausgabe
        pc.printf("20%x%x/%x%x/%x%x %s\n",
                  ((year >> 4) & 0x03) , (year & 0x0F) ,
                  ((month >> 4) & 0x01), (month & 0x0F) ,
                  ((day >> 4) & 0x03), (day & 0x0F) ,
                  week_chr[week & 0x07]);

        //Zeit Ausgabe
        pc.printf("%x%x:%x%x:%x%x\n",
                  ((hour >> 4) & 0x03), (hour & 0x0F),
                  (minute >> 4), (minute & 0x0F) ,
                  (sec >> 4), (sec & 0x0F) );
        wait(1);
    }
}

Teste das Programm mit HIMBED M0 Board.

Task Init

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