Diff: RTC/ds3231m.h

Revision:

0:f6e68b4ce169

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RTC/ds3231m.h	Mon Feb 09 13:40:46 2015 +0000
@@ -0,0 +1,67 @@
+/*
+ * VFD Modular Clock - mbed
+ * (C) 2011-14 Akafugu Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ */
+
+#ifndef __DS3231M_H_
+#define __DS3231M_H_
+
+#include "rtc.h"
+
+// leap year calulator expects year argument as years offset from 1970
+#define LEAP_YEAR(Y)     ( ((1970+Y)>0) && !((1970+Y)%4) && ( ((1970+Y)%100) || !((1970+Y)%400) ) )
+/* Useful Constants */
+#define SECS_PER_MIN  (60UL)
+#define SECS_PER_HOUR (3600UL)
+#define SECS_PER_DAY  (SECS_PER_HOUR * 24UL)
+#define DAYS_PER_WEEK (7UL)
+#define SECS_PER_WEEK (SECS_PER_DAY * DAYS_PER_WEEK)
+#define SECS_PER_YEAR (SECS_PER_WEEK * 52UL)
+#define SECS_YR_2000  (946684800UL) // the time at the start of y2k
+
+class DS3231M : public RTC {
+public:
+    DS3231M(I2C& i2c);
+    
+    virtual void begin();
+    
+    virtual time_t time();
+    virtual struct tm* getTime();
+    virtual void getTime(uint8_t* hour, uint8_t* min, uint8_t* sec);
+
+    virtual void setTime(time_t t);
+    virtual void setTime(struct tm* tm);
+    virtual void setTime(uint8_t hour, uint8_t min, uint8_t sec);
+
+    virtual void setAlarm(time_t t);
+    virtual void setAlarm(uint8_t hour, uint8_t min, uint8_t sec);
+    virtual struct tm* getAlarm(void);
+    virtual void getAlarm(uint8_t* hour, uint8_t* min, uint8_t* sec);
+    virtual bool checkAlarm(void);
+    
+    virtual void SQWEnable(bool enable);
+    virtual void SQWSetFreq(enum RTC_SQW_FREQ freq);
+    virtual void Osc32kHzEnable(bool enable);
+
+private:
+    I2C& m_i2c;
+
+    bool m_is_ds1307;
+    bool m_is_ds3231;
+
+    uint8_t read_byte(uint8_t offset);
+    void write_byte(uint8_t b, uint8_t offset);
+    void write_addr(uint8_t addr);
+};
+
+#endif // __DS3231M_H_