Using MPU6050 accelerometer/gyroscope module

Question

I'm testing my MPU6050 module with Arduino Mega. I found Jeff Rowberg has written a library for this. I tried with this example provided by him. But the Arduino IDE gives a large number of errors when trying to verify the sketch.

I've already installed Jeffs library. (following image shows the library content)

This is the error I'm getting:

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'

How do I overcome this?

I've been trying very hard to use this device to get acceleration/gyroscope values. But still no success.

---

EDIT

This is what I get when trying to compile (verify).

Solution 1

The MPU6050_DMP6 example provided by Jeff works for me. From your compile error, it seems that you've included MPU6050.h, instead of MPU6050_6Axis_MotionApps20.h. Make sure you include the correct one.

If you look at the library code, you'll notice that the .dmp___ methods are not implemented in the MPU6050.cpp file, but in the MPU6050_6Axis_MotionApps20.h file. If this doesn't solve it, post your code.

Solution 2

try putting jeffs i2c .cpp and .h files into the same folder as the mpu6050 library files i found that this then worked for me, sorry if this is a litte late but hopefully helpful :P

Solution 3

I was having the same problem and it turned out I was including both MPU6050.h and MPU6050_6Axis_MotionApps20.h. I commented out MPU6050.h and it now compiles fine. Seems that the former was overriding the latter.

Solution 4

I've solved the compile problem by putting I2Cdev.cpp and I2C.h in the MPU6050 library folder. (Mind: these are the dev files). These are Jeff's libraries and can be found at GitHub

View more solutions

Comments

[Anubis]

Thanks! I've tried exactly with this code. There can't be any wrong I guess. I wonder whether my library is not properly established. Please see the first image in my question, I've included a screenshot there. But as I see, there's no any problem either. Anyhow, compiler still gives the same error..

[Anubis]

The issue was solved after upgrading the arduino ide to the latest. Thanks anyway..

[Derrick]

^ Should post your solution as answer