[WIP] initial API design

samd basic functions ported

src/ArduinoLowPower.h

@@ -0,0 +1,35 @@
+#ifndef _ARDUINO_LOW_POWER_H_
+#define _ARDUINO_LOW_POWER_H_
+
+#include <Arduino.h>
+
+#ifdef ARDUINO_ARCH_SAMD
+#include "RTCZero.h"
+#endif
+
+//typedef void (*voidFuncPtr)( void ) ;
+
+class ArduinoLowPowerClass {
+	public:
+		void idle(void);
+		void idle(uint32_t millis);
+
+		void sleep(void);
+		void sleep(uint32_t millis);
+
+		void deepSleep(void);
+		void deepSleep(uint32_t millis);
+
+		void attachInterruptWakeup(uint32_t pin, voidFuncPtr callback, uint32_t mode);
+
+	private:
+		#ifdef ARDUINO_ARCH_SAMD
+		void setAlarmIn(uint32_t millis);
+		RTCZero rtc;
+		#define RTC_ALARM_WAKEUP	0xFF
+		#endif
+};
+
+extern ArduinoLowPowerClass LowPower;
+
+#endif