Franz Pucher / HIM0Board

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PCF8563 Read Write

Table of Contents

    Inhalt

    I2C-Routinen

        i2c.frequency(40000);               // I2C Frequenz 40kHz
    char init1[2] = {0x6, 0x00};
    char init2[2] = {0x7, 0xff};
    i2c.write(0x40, init1, 2);
    i2c.write(0x40, init2, 2);

    I2C und PCF initiallisieren

        uint8_t value;
    i2c.start();
    i2c.write(PCF8563_ADR_WR);
    i2c.write(address);
    i2c.write(PCF8563_ADR_RD);
    value = i2c.read(0);
    i2c.stop();

    Read value von address

        i2c.start();
    i2c.write(PCF8563_ADR_WR);
    i2c.write(address);
    i2c.write(value);
    i2c.stop();

    Write value to address

    /***********************************
name:   const.h    Version: 0.3
author: PE HTL BULME
email:  pe@bulme.at
description:
  Named constants definitions for registers 
  PCF8563 RTC on HIMBED M0 - LPC11U24 
***********************************/
 
#ifndef CONST_H
#define CONST_H
 
// Address of RTC
const uint8_t PCF8563_ADR_WR = 0xA2;
const uint8_t PCF8563_ADR_RD = 0xA3;
// Control and status
const uint8_t CONTROL1 = 0x00;
const uint8_t CONTROL2 = 0x01;
// Time and date
const uint8_t SECONDS = 0x02;   
const uint8_t MINUTES = 0x03;
const uint8_t HOURS = 0x04;
const uint8_t DAYS = 0x05;
const uint8_t WEEKDAYS = 0x06;
const uint8_t MONTHS = 0x07;
const uint8_t YEARS = 0x08;
// Alarm
const uint8_t MINUTE_ALARM = 0x09;
const uint8_t HOUR_ALARM = 0x0A;
const uint8_t DAY_ALARM = 0x0B;
const uint8_t WEEKDAY_ALARM = 0x0C;
// Clock and timer
const uint8_t CLOCKOUT_FREQ = 0x0D;
const uint8_t TIMER_CINTROL = 0x0E;

#endif

    const.h

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