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I2c library is not working on arduino Due. I comment the TWR line as mentioned in other post. When I compiled the program, I received this error as shown in picture. Can anyone please help me? C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp: In member function 'void MPU6050::PID(uint8_t, float, float, uint8_t)': C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3258:65: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::readWords(devAddr, SaveAddress + (i * shift), 1, &Data); // reads 1 or more 16 bit integers (Word) ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:115:23: error: initializing argument 4 of 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)' [-fpermissive] static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3272:63: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::readWords(devAddr, ReadAddress + (i * 2), 1, &Data); // reads 1 or more 16 bit integers (Word) ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:115:23: error: initializing argument 4 of 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)' [-fpermissive] static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3283:69: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::writeWords(devAddr, SaveAddress + (i * shift), 1, &Data); ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:124:21: error: initializing argument 4 of 'static bool I2Cdev::writeWords(uint8_t, uint8_t, uint8_t, uint16_t*)' [-fpermissive] static bool writeWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3301:68: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::writeWords(devAddr, SaveAddress + (i * shift), 1, &Data ); ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:124:21: error: initializing argument 4 of 'static bool I2Cdev::writeWords(uint8_t, uint8_t, uint8_t, uint16_t*)' [-fpermissive] static bool writeWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp: In member function 'void MPU6050::PrintActiveOffsets()': C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3315:81: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] if(AOffsetRegister == 0x06) I2Cdev::readWords(devAddr, AOffsetRegister, 3, Data); ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:115:23: error: initializing argument 4 of 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)' [-fpermissive] static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3317:54: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::readWords(devAddr, AOffsetRegister, 1, Data); ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:115:23: error: initializing argument 4 of 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)' [-fpermissive] static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3318:56: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::readWords(devAddr, AOffsetRegister+3, 1, Data+1); ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:115:23: error: initializing argument 4 of 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)' [-fpermissive] static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3319:56: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::readWords(devAddr, AOffsetRegister+6, 1, Data+2); ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:115:23: error: initializing argument 4 of 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)' [-fpermissive] static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3308:196: error: 'dtostrf' was not declared in this scope #define printfloatx(Name,Variable,Spaces,Precision,EndTxt) Serial.print(F(Name)); {char S[(Spaces + Precision + 3)];Serial.print(F(" ")); Serial.print(dtostrf((float)Variable,Spaces,Precision ,S));}Serial.print(F(EndTxt));//Name,Variable,Spaces,Precision,EndTxt ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3322:2: note: in expansion of macro 'printfloatx' printfloatx("", Data[0], 5, 0, ", "); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3308:196: error: 'dtostrf' was not declared in this scope #define printfloatx(Name,Variable,Spaces,Precision,EndTxt) Serial.print(F(Name)); {char S[(Spaces + Precision + 3)];Serial.print(F(" ")); Serial.print(dtostrf((float)Variable,Spaces,Precision ,S));}Serial.print(F(EndTxt));//Name,Variable,Spaces,Precision,EndTxt ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3323:2: note: in expansion of macro 'printfloatx' printfloatx("", Data[1], 5, 0, ", "); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3308:196: error: 'dtostrf' was not declared in this scope #define printfloatx(Name,Variable,Spaces,Precision,EndTxt) Serial.print(F(Name)); {char S[(Spaces + Precision + 3)];Serial.print(F(" ")); Serial.print(dtostrf((float)Variable,Spaces,Precision ,S));}Serial.print(F(EndTxt));//Name,Variable,Spaces,Precision,EndTxt ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3324:2: note: in expansion of macro 'printfloatx' printfloatx("", Data[2], 5, 0, ", "); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3325:42: error: invalid conversion from 'int16_t* {aka short int*}' to 'uint16_t* {aka short unsigned int*}' [-fpermissive] I2Cdev::readWords(devAddr, 0x13, 3, Data); ^ In file included from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.h:40:0, from C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:38: C:\Program Files (x86)\Arduino\libraries\I2Cdev/I2Cdev.h:115:23: error: initializing argument 4 of 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)' [-fpermissive] static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout=I2Cdev::readTimeout); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3308:196: error: 'dtostrf' was not declared in this scope #define printfloatx(Name,Variable,Spaces,Precision,EndTxt) Serial.print(F(Name)); {char S[(Spaces + Precision + 3)];Serial.print(F(" ")); Serial.print(dtostrf((float)Variable,Spaces,Precision ,S));}Serial.print(F(EndTxt));//Name,Variable,Spaces,Precision,EndTxt ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3327:2: note: in expansion of macro 'printfloatx' printfloatx("", Data[0], 5, 0, ", "); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3308:196: error: 'dtostrf' was not declared in this scope #define printfloatx(Name,Variable,Spaces,Precision,EndTxt) Serial.print(F(Name)); {char S[(Spaces + Precision + 3)];Serial.print(F(" ")); Serial.print(dtostrf((float)Variable,Spaces,Precision ,S));}Serial.print(F(EndTxt));//Name,Variable,Spaces,Precision,EndTxt ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3328:2: note: in expansion of macro 'printfloatx' printfloatx("", Data[1], 5, 0, ", "); ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3308:196: error: 'dtostrf' was not declared in this scope #define printfloatx(Name,Variable,Spaces,Precision,EndTxt) Serial.print(F(Name)); {char S[(Spaces + Precision + 3)];Serial.print(F(" ")); Serial.print(dtostrf((float)Variable,Spaces,Precision ,S));}Serial.print(F(EndTxt));//Name,Variable,Spaces,Precision,EndTxt ^ C:\Program Files (x86)\Arduino\libraries\MPU6050\MPU6050.cpp:3329:2: note: in expansion of macro 'printfloatx' printfloatx("", Data[2], 5, 0, "\n"); ^ exit status 1 Error compiling for board Arduino Due (Native USB Port).

hello sir/madam i am looking for the libraries for interfacing Arduino due(Cortex M3) and MPU-9150. can you suggest me where can i download those libraries. Thank you regards Radhamani N

Hi guys, I come here, to ask you all nice people one tricky question.But for the beginning I will describe you my project which I am working on. My project is quadcopter, but not normal one, on board should be raspberry pi and arduino due with mpu6050. Basically everything works very well but not always. Here comes the problem. Sometimes Arduino DUE cant connect to mpu6050 over I2C. Sometimes it can and after restart of arduino DUE it again cant connect. Afterwards I have to power off arduino DUE and than power it again on. Than it works. So it looks to me some problem with registers or probably as I read, it can be with pull-ups on I2C. I was trying to repair it for a month but I could not, after lot of time I am trying to contact some person or group of people who could help me. I would be happy for all kinds of help. Here I am posting also my code on github and some pics of quadcopter. https://github.com/JurajKabzan/Quadcopter Little description of my project. On pc runs ground control written in C# which generates control strings and than sends them over network connection through sockets to raspberry pi, it executes them and then when necessary sends directly over serial to arduino DUE. Arduino DUE takes care for PIDs and sensors staff. When I use example dmp from i2cdevlib it happens the same.One I can next time I can not connect. Please I will be happy for all kind of help!