arduino - 使用 MPU6050 加速度计/陀螺仪模块

Question

我正在使用Arduino Mega测试我的MPU6050 模块。我发现 Jeff Rowberg 为此编写了一个库。我尝试了他提供的这个例子。但是 Arduino IDE 在尝试验证草图时会出现大量错误。

我已经安装了 Jeffs 库。（下图显示了库内容）

这是我得到的错误：

In file included from C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:42,
                 from sketch_dec08a.cpp:50:
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050.h:792: warning: only initialized variables can be placed into program memory area
In file included from sketch_dec08a.cpp:50:
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:89: warning: only initialized variables can be placed into program memory area
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:89: error: conflicting declaration 'const prog_uchar dmpMemory [1929]'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050.h:792: error: 'dmpMemory' has a previous declaration as 'prog_uchar dmpMemory [1929]'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:229: warning: only initialized variables can be placed into program memory area
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:271: warning: only initialized variables can be placed into program memory area
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:271: error: conflicting declaration 'const prog_uchar dmpUpdates [47]'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050.h:931: error: 'dmpUpdates' has a previous declaration as 'uint8_t dmpUpdates [29][9]'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:281: error: no 'uint8_t MPU6050::dmpInitialize()' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:506: error: no 'bool MPU6050::dmpPacketAvailable()' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:533: error: no 'uint8_t MPU6050::dmpGetAccel(int32_t*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:541: error: no 'uint8_t MPU6050::dmpGetAccel(int16_t*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:549: error: no 'uint8_t MPU6050::dmpGetAccel(VectorInt16*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:557: error: no 'uint8_t MPU6050::dmpGetQuaternion(int32_t*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:566: error: no 'uint8_t MPU6050::dmpGetQuaternion(int16_t*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:575: error: no 'uint8_t MPU6050::dmpGetQuaternion(Quaternion*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:590: error: no 'uint8_t MPU6050::dmpGetGyro(int32_t*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:598: error: no 'uint8_t MPU6050::dmpGetGyro(int16_t*, const uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:608: error: no 'uint8_t MPU6050::dmpGetLinearAccel(VectorInt16*, VectorInt16*, VectorFloat*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:616: error: no 'uint8_t MPU6050::dmpGetLinearAccelInWorld(VectorInt16*, VectorInt16*, Quaternion*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:628: error: no 'uint8_t MPU6050::dmpGetGravity(VectorFloat*, Quaternion*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:639: error: no 'uint8_t MPU6050::dmpGetEuler(float*, Quaternion*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:645: error: no 'uint8_t MPU6050::dmpGetYawPitchRoll(float*, Quaternion*, VectorFloat*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:658: error: no 'uint8_t MPU6050::dmpProcessFIFOPacket(const unsigned char*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:668: error: no 'uint8_t MPU6050::dmpReadAndProcessFIFOPacket(uint8_t, uint8_t*)' member function declared in class 'MPU6050'
C:\Users\LordXaX\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:693: error: no 'uint16_t MPU6050::dmpGetFIFOPacketSize()' member function declared in class 'MPU6050'
sketch_dec08a.cpp: In function 'void setup()':
sketch_dec08a.cpp:177: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp:181: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp:182: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp:182: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp:185: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp:191: warning: only initialized variables can be placed into program memory area
sketch_dec08a:187: error: 'class MPU6050' has no member named 'dmpInitialize'
sketch_dec08a.cpp:197: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp:201: warning: only initialized variables can be placed into program memory area
sketch_dec08a:198: error: 'class MPU6050' has no member named 'getIntStatus'
sketch_dec08a.cpp:206: warning: only initialized variables can be placed into program memory area
sketch_dec08a:205: error: 'class MPU6050' has no member named 'dmpGetFIFOPacketSize'
sketch_dec08a.cpp:216: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp:218: warning: only initialized variables can be placed into program memory area
sketch_dec08a.cpp: In function 'void loop()':
sketch_dec08a:246: error: 'class MPU6050' has no member named 'getIntStatus'
sketch_dec08a.cpp:260: warning: only initialized variables can be placed into program memory area
sketch_dec08a:263: error: 'class MPU6050' has no member named 'getFIFOBytes'

我该如何克服呢？

我一直在非常努力地使用这个设备来获取加速度/陀螺仪值。但仍然没有成功。

---

编辑

这是我在尝试编译（验证）时得到的。

Answer 1

Jeff 提供的 MPU6050_DMP6 示例对我有用。从您的编译错误来看，您似乎包含了 MPU6050.h，而不是 MPU6050_6Axis_MotionApps20.h。确保包含正确的内容。

如果您查看库代码，您会注意到 .dmp_ _ _ 方法不是在 MPU6050.cpp 文件中实现，而是在 MPU6050_6Axis_MotionApps20.h 文件中实现。如果这不能解决问题，请发布您的代码。

Answer 2

尝试将 jeffs i2c .cpp 和 .h 文件放入与 mpu6050 库文件相同的文件夹中，我发现这对我有用，抱歉，如果这有点晚了，但希望对您有所帮助：P

Answer 3

我遇到了同样的问题，结果发现我同时包含了 MPU6050.h 和 MPU6050_6Axis_MotionApps20.h。我注释掉了 MPU6050.h，它现在可以正常编译了。似乎前者压倒了后者。

Answer 4

我通过将 I2Cdev.cpp 和 I2C.h 放在 MPU6050 库文件夹中解决了编译问题。（注意：这些是开发文件）。这些是 Jeff 的库，可以在GitHub 上找到