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arduino-cli/libraries/Adafruit_Circuit_Playground/utility/CPlay_CapacitiveSensor.h

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+/*
+  CapacitiveSense.h v.04 - Capacitive Sensing Library for 'duino / Wiring
+  https://github.com/PaulStoffregen/CapacitiveSensor
+  http://www.pjrc.com/teensy/td_libs_CapacitiveSensor.html
+  http://playground.arduino.cc/Main/CapacitiveSensor
+  Copyright (c) 2008 Paul Bagder  All rights reserved.
+  Version 05 by Paul Stoffregen - Support non-AVR board: Teensy 3.x, Arduino Due
+  Version 04 by Paul Stoffregen - Arduino 1.0 compatibility, issue 146 fix
+  vim: set ts=4:
+*/
+
+// ensure this library description is only included once
+#ifndef CapacitiveSensor_h
+#define CapacitiveSensor_h
+
+#if ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+
+#if defined(ARDUINO_NRF52840_CIRCUITPLAY)
+#define RwReg uint32_t
+#elif defined(__AVR__)
+#define RwReg uint8_t
+#endif
+
+
+/**************************************************************************/
+/*! 
+    @brief  Class that stores state and functions for the capacitive sensor on CircuitPlayground boards
+*/
+/**************************************************************************/
+class CPlay_CapacitiveSensor
+{
+  // user-accessible "public" interface
+  public:
+  // methods
+	CPlay_CapacitiveSensor(uint8_t sendPin = 0, uint8_t receivePin = 0);
+	long capacitiveSensorRaw(uint8_t samples);
+	long capacitiveSensor(uint8_t samples);
+	void set_CS_Timeout_Millis(unsigned long timeout_millis);
+	void reset_CS_AutoCal();
+	void set_CS_AutocaL_Millis(unsigned long autoCal_millis);
+  // library-accessible "private" interface
+  private:
+  // variables
+	int error;
+	unsigned long  leastTotal;
+	unsigned int   loopTimingFactor;
+	unsigned long  CS_Timeout_Millis;
+	unsigned long  CS_AutocaL_Millis;
+	unsigned long  lastCal;
+	unsigned long  total;
+	uint8_t _sendPin, _receivePin;
+	volatile RwReg *send_outport, *recv_outport, *recv_inport, *recv_direction;
+	RwReg send_mask, recv_mask;
+  
+  // methods
+	int SenseOneCycle(void);
+};
+
+#endif