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+/*
+ * MSA301ForStuduino
+ *
+ * Adafruit_MSA301 v1.1.0 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。
+ */
+/*!
+ * @file     MSA301ForStuduino.cpp
+ *
+ * @mainpage Adafruit MSA301 Accelerometer Breakout
+ *
+ * @section intro_sec Introduction
+ *
+ * This is a library for the Adafruit MSA301 Accel breakout board
+ * ----> https://www.adafruit.com
+ *
+ * Adafruit invests time and resources providing this open source code,
+ * please support Adafruit and open-source hardware by purchasing
+ * products from Adafruit!
+ *
+ * @section author Author
+ *
+ * Limor Fried (Adafruit Industries)
+ *
+ * @section license License
+ *
+ * BSD license, all text here must be included in any redistribution.
+ *
+ */
+
+#include <MSA301ForStuduino.h>
+
+/**************************************************************************/
+/*!
+    @brief  Instantiates a new MSA301 class
+*/
+/**************************************************************************/
+Adafruit_MSA301::Adafruit_MSA301() : i2c_dev(nullptr) {}
+
+/**************************************************************************/
+/*!
+    @brief  Instantiates a new MSA311 class
+*/
+/**************************************************************************/
+Adafruit_MSA311::Adafruit_MSA311() {}
+
+/*!
+ *    @brief  Sets up the hardware and initializes I2C
+ *    @param  i2c_address
+ *            The I2C address to be used.
+ *    @param  wire
+ *            The Wire object to be used for I2C connections.
+ *    @return True if initialization was successful, otherwise false.
+ */
+bool Adafruit_MSA311::begin(uint8_t i2c_address, TwoWire *wire) {
+  return Adafruit_MSA301::begin(i2c_address, wire);
+}
+
+/*!
+ *    @brief  Sets up the hardware and initializes I2C
+ *    @param  i2c_address
+ *            The I2C address to be used.
+ *    @param  wire
+ *            The Wire object to be used for I2C connections.
+ *    @return True if initialization was successful, otherwise false.
+ */
+bool Adafruit_MSA301::begin(uint8_t i2c_address, TwoWire *wire) {
+  if (i2c_dev == nullptr) {
+    i2c_dev = new Adafruit_I2CDevice(i2c_address, wire);
+  }
+  if (!i2c_dev->begin()) {
+    // Serial.println("Failed to init i2c address");
+    return false;
+  }
+
+  // Check connection
+  Adafruit_BusIO_Register chip_id =
+      Adafruit_BusIO_Register(i2c_dev, MSA301_REG_PARTID, 1);
+
+  // make sure we're talking to the right chip
+  if (chip_id.read() != 0x13) {
+    // No MSA301 detected ... return false
+    return false;
+  }
+
+  // enableAxes(true, true, true);
+  // setDataRate(MSA301_DATARATE_125_HZ);
+  Adafruit_BusIO_Register ODR = Adafruit_BusIO_Register(i2c_dev, MSA301_REG_ODR, 1);
+  // enable all axes
+  Adafruit_BusIO_RegisterBits x = Adafruit_BusIO_RegisterBits(&ODR, 1, 7);
+  Adafruit_BusIO_RegisterBits y = Adafruit_BusIO_RegisterBits(&ODR, 1, 6);
+  Adafruit_BusIO_RegisterBits z = Adafruit_BusIO_RegisterBits(&ODR, 1, 5);
+  x.write(false); // these are *disable* bits, yeah...
+  y.write(false);
+  z.write(false);
+  // 125Hz rate
+  Adafruit_BusIO_RegisterBits dataratebits = Adafruit_BusIO_RegisterBits(&ODR, 4, 0);
+  dataratebits.write(MSA301_DATARATE_125_HZ);
+
+  // setPowerMode(MSA301_NORMALMODE);
+  // setBandwidth(MSA301_BANDWIDTH_250_HZ);
+  Adafruit_BusIO_Register PowerMode = Adafruit_BusIO_Register(i2c_dev, MSA301_REG_POWERMODE, 1);
+  // normal mode
+  Adafruit_BusIO_RegisterBits powermodebits = Adafruit_BusIO_RegisterBits(&PowerMode, 2, 6);
+  powermodebits.write(MSA301_NORMALMODE);
+  // 250Hz bw
+  Adafruit_BusIO_RegisterBits bandwidthbits = Adafruit_BusIO_RegisterBits(&PowerMode, 4, 1);
+  bandwidthbits.write(MSA301_BANDWIDTH_250_HZ);
+
+  // setRange(MSA301_RANGE_2_G);
+  // setResolution(MSA301_RESOLUTION_8);
+  Adafruit_BusIO_Register ResRange = Adafruit_BusIO_Register(i2c_dev, MSA301_REG_RESRANGE, 1);
+  // 2G
+  Adafruit_BusIO_RegisterBits rangebits = Adafruit_BusIO_RegisterBits(&ResRange, 2, 0);
+  rangebits.write(MSA301_RANGE_2_G);
+  // 8bit
+  Adafruit_BusIO_RegisterBits resbits = Adafruit_BusIO_RegisterBits(&ResRange, 2, 2);
+  resbits.write(MSA301_RESOLUTION_8);
+
+  return true;
+}
+
+/**************************************************************************/
+/*!
+  @brief  Read the XYZ data from the accelerometer and store in the internal
+  x, y and z (and x_g, y_g, z_g) member variables.
+*/
+/**************************************************************************/
+void Adafruit_MSA301::read(void) {
+  uint8_t buffer[6];
+
+  Adafruit_BusIO_Register XYZDataReg =
+      Adafruit_BusIO_Register(i2c_dev, MSA301_REG_OUT_X_L, 6);
+  XYZDataReg.read(buffer, 6);
+
+  y = 255 - buffer[1];
+  x = 255 - buffer[3];
+  z = buffer[5];
+}