通过IIC输出三轴磁力原始数据

通过MechaQMC5883库输出yaw角

我找了不少关于QMC磁力计的文章，发现不管是商家给的程序还是博客的其他文章，都是基于stm32的，而QMC在arduino上的应用却没多少，于是就一边看着数据文档，一边在arduino上实现QMC。

这里用的是arduino nano，
引脚连接：
nano -> QMC
5V -> VCC
A5 -> SCL
A4 -> SDA
GND -> GND

首先在例程中找到I2C_scanner,打开，连接QMC，上传。

如果没有这个例程，这里给出：

// --------------------------------------
// i2c_scanner
//
// Version 1
//    This program (or code that looks like it)
//    can be found in many places.
//    For example on the Arduino.cc forum.
//    The original author is not know.
// Version 2, Juni 2012, Using Arduino 1.0.1
//     Adapted to be as simple as possible by Arduino.cc user Krodal
// Version 3, Feb 26  2013
//    V3 by louarnold
// Version 4, March 3, 2013, Using Arduino 1.0.3
//    by Arduino.cc user Krodal.
//    Changes by louarnold removed.
//    Scanning addresses changed from 0...127 to 1...119,
//    according to the i2c scanner by Nick Gammon
//    https://www.gammon.com.au/forum/?id=10896
// Version 5, March 28, 2013
//    As version 4, but address scans now to 127.
//    A sensor seems to use address 120.
// Version 6, November 27, 2015.
//    Added waiting for the Leonardo serial communication.
//
//
// This sketch tests the standard 7-bit addresses
// Devices with higher bit address might not be seen properly.
//

#include <Wire.h>

void setup() {
   
  Wire.begin();

  Serial.begin(9600);
  while (!Serial); // Leonardo: wait for serial monitor
  Serial.println("\nI2C Scanner");
}

void loop() {
   
  int nDevices = 0;

  Serial.println("Scanning...");

  for (byte address = 1