Diff: PCF8563.h

Revision:

0:47c63ed3af91

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8563.h	Fri Jan 22 08:50:40 2016 +0000
@@ -0,0 +1,61 @@
+#ifndef PCF8563_H
+#define PCF8563_H
+
+#define W8563_ADDR     0xA2    // I2C address for write
+#define R8563_ADDR     0xA3    // I2C address for read
+#define PCF8563_FREQ     400000  // bus speed 400 kHz
+
+class PCF8563
+{
+public:
+    PCF8563(PinName sda, PinName scl);
+
+    /** Read current real time from PCF8563
+     *
+     * @returns
+     *   current time on success,
+     *   0 on error (I2C fail, clock not set)
+     */
+    time_t now();
+    
+    /** Write current real time to PCF8563
+     *
+     * @param time Real time to set up
+     * @returns
+     *   true on success,
+     *   false on error (I2C fail)
+     */
+    bool set_time(time_t time);
+    
+    /** Write alarm time to PCF8563
+     * @param time is set time for alarm
+     * @returns
+     *    true on success,
+     *    false on error
+     */
+    bool set_alarm(time_t time);
+    
+    /**
+     */
+    bool alarmOff();
+    
+    /**
+     */
+    bool check_alarm();
+    
+    /**
+     */
+    
+private:
+    I2C pcf8563_i2c;
+
+    static int bcdToDecimal(int bcd) {
+        return ((bcd & 0xF0) >> 4) * 10 + (bcd & 0x0F);
+    }
+
+    static int decimalToBcd(int dec) {
+        return (dec % 10) + ((dec / 10) << 4);
+    }
+};
+
+#endif