Add GenericRTC.h back (symlink issue.)

Author: JChristensen

library.properties

@@ -1,5 +1,5 @@
 name=DS3232RTC
-version=3.1.0
+version=3.1.1
 author=Jack Christensen <jack.christensen@outlook.com>
 maintainer=Jack Christensen <jack.christensen@outlook.com>
 sentence=Arduino Library for Maxim Integrated DS3231 and DS3232 Real-Time Clocks.

src/GenericRTC.h

@@ -0,0 +1,31 @@
+// Abtract base class for:
+//   Arduino DS3232RTC Library https://github.com/JChristensen/DS3232RTC
+//   and Arduino MCP79412RTC Library // https://github.com/JChristensen/MCP79412RTC
+// Copyright (C) 2025 by Jack Christensen and licensed under
+// GNU GPL v3.0, https://www.gnu.org/licenses/gpl.html
+//
+// Allows a sketch to work with either type of RTC, can be determined at run time.
+
+#ifndef GENERIC_RTC_H_INCLUDED
+#define GENERIC_RTC_H_INCLUDED
+
+#include <Arduino.h>
+#include <TimeLib.h>    // https://github.com/PaulStoffregen/Time
+#include <Wire.h>
+
+class GenericRTC
+{
+    public:
+        GenericRTC(TwoWire& tw=Wire) : wire(tw) {};
+        virtual void begin() = 0;
+        virtual time_t get() = 0;
+        virtual uint8_t set(const time_t t) = 0;
+        virtual uint8_t writeRTC(const uint8_t addr, const uint8_t* values, const uint8_t nBytes) = 0;
+        virtual uint8_t writeRTC(const uint8_t addr, const uint8_t value) = 0;
+        virtual uint8_t readRTC(const uint8_t addr, uint8_t* values, const uint8_t nBytes) = 0;
+        virtual uint8_t readRTC(const uint8_t addr) = 0;
+
+    protected:
+        TwoWire& wire;      // reference to Wire, Wire1, etc.
+};
+#endif