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+/*
+ * MSA301ForStuduino
+ *
+ * Adafruit_MSA301 v1.1.0 (https://github.com/adafruit/Adafruit_MSA301) を
+ * 株式会社アーテックが Studuino 向けに改変したものです。
+ * 改変内容は同梱の README.md を参照してください。
+ * オリジナルの著作権表示およびライセンスは license.txt のとおりです。
+ */
+/*!
+ * @file     MSA301ForStuduino.h
+ */
+
+#ifndef MSA301FORSTUDUINO_H
+#define MSA301FORSTUDUINO_H
+
+#include <BusIOForStuduino_Register.h>
+#include <BusIOForStuduino_I2CDevice.h>
+#include <Wire.h>
+
+/*=========================================================================
+I2C ADDRESS/BITS
+-----------------------------------------------------------------------*/
+#define MSA301_I2CADDR_DEFAULT (0x26) ///< Fixed I2C address
+#define MSA311_I2CADDR_DEFAULT (0x62) ///< Fixed I2C address
+/*=========================================================================*/
+
+#define MSA301_REG_PARTID 0x01    ///< Register that contains the part ID
+#define MSA301_REG_OUT_X_L 0x02   ///< Register address for X axis lower byte
+#define MSA301_REG_RESRANGE 0x0F  ///< Register address for resolution range
+#define MSA301_REG_ODR 0x10       ///< Register address for data rate setting
+#define MSA301_REG_POWERMODE 0x11 ///< Register address for power mode setting
+
+/** The accelerometer ranges */
+#define MSA301_RANGE_2_G 0b00             ///< +/- 2g (default value)
+/** The accelerometer data rate */
+#define MSA301_DATARATE_125_HZ 0b0111     ///<  125 Hz
+/** The accelerometer bandwidth */
+#define MSA301_BANDWIDTH_250_HZ 0b1001    ///<  250 Hz
+/** The accelerometer power mode */
+#define MSA301_NORMALMODE 0b00            ///< Normal (high speed) mode
+/** The accelerometer read resolution */
+#define MSA301_RESOLUTION_8 0b11          ///< 8-bit resolution
+
+/** Class for hardware interfacing with an MSA301 accelerometer */
+class Adafruit_MSA301 { // : public Adafruit_Sensor {
+public:
+  Adafruit_MSA301(void);
+  bool begin(uint8_t i2c_addr = MSA301_I2CADDR_DEFAULT, TwoWire *wire = &Wire);
+
+  void read();
+  int8_t x, ///< The last read X acceleration in raw units
+      y,     ///< The last read Y acceleration in raw units
+      z;     ///< The last read Z acceleration in raw units
+
+private:
+  Adafruit_I2CDevice *i2c_dev;
+};
+
+/** Class for hardware interfacing with an MSA311 accelerometer */
+class Adafruit_MSA311 : public Adafruit_MSA301 {
+public:
+  Adafruit_MSA311(void);
+  bool begin(uint8_t i2c_addr = MSA311_I2CADDR_DEFAULT, TwoWire *wire = &Wire);
+};
+
+#endif