Mega2560 读取 MPU6050

Posted 大G霸

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篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了Mega2560 读取 MPU6050相关的知识,希望对你有一定的参考价值。

在Mega中读取Mpu6050,好像文章不太多。特此转载官网的MPU6050。

原版地址:https://playground.arduino.cc/Main/MPU-6050

我们的6050接线是使用20和21引脚,注意MEGA这里20是SCL引脚,21是SDA引脚。对应MPU6050的两个SCL和SDA,要反接。

注意要反接,反接,反接(重要的事情说三遍)。

接线图可以参考MPU9250,两个接线是一样的。

程序可以参考官网程序,我之后只需要Gyro的数据,所以我们注释掉多余的信息输出。

并且我的串口输出的波特率已经调成230400,电脑端相应的端口也是230400。

而波特率就是串口每秒传输的bits数,例如9600bps就是每秒传输9600bits。

 

 
#include <Wire.h>
 
 
// The name of the sensor is "MPU-6050".
// For program code, I omit the \'-\',
// therefor I use the name "MPU6050....".
 
 
// Register names according to the datasheet.
// According to the InvenSense document
// "MPU-6000 and MPU-6050 Register Map
// and Descriptions Revision 3.2", there are no registers
// at 0x02 ... 0x18, but according other information
// the registers in that unknown area are for gain
// and offsets.
//
#define MPU6050_AUX_VDDIO          0x01   // R/W
#define MPU6050_SMPLRT_DIV         0x19   // R/W
#define MPU6050_CONFIG             0x1A   // R/W
#define MPU6050_GYRO_CONFIG        0x1B   // R/W
#define MPU6050_ACCEL_CONFIG       0x1C   // R/W
#define MPU6050_FF_THR             0x1D   // R/W
#define MPU6050_FF_DUR             0x1E   // R/W
#define MPU6050_MOT_THR            0x1F   // R/W
#define MPU6050_MOT_DUR            0x20   // R/W
#define MPU6050_ZRMOT_THR          0x21   // R/W
#define MPU6050_ZRMOT_DUR          0x22   // R/W
#define MPU6050_FIFO_EN            0x23   // R/W
#define MPU6050_I2C_MST_CTRL       0x24   // R/W
#define MPU6050_I2C_SLV0_ADDR      0x25   // R/W
#define MPU6050_I2C_SLV0_REG       0x26   // R/W
#define MPU6050_I2C_SLV0_CTRL      0x27   // R/W
#define MPU6050_I2C_SLV1_ADDR      0x28   // R/W
#define MPU6050_I2C_SLV1_REG       0x29   // R/W
#define MPU6050_I2C_SLV1_CTRL      0x2A   // R/W
#define MPU6050_I2C_SLV2_ADDR      0x2B   // R/W
#define MPU6050_I2C_SLV2_REG       0x2C   // R/W
#define MPU6050_I2C_SLV2_CTRL      0x2D   // R/W
#define MPU6050_I2C_SLV3_ADDR      0x2E   // R/W
#define MPU6050_I2C_SLV3_REG       0x2F   // R/W
#define MPU6050_I2C_SLV3_CTRL      0x30   // R/W
#define MPU6050_I2C_SLV4_ADDR      0x31   // R/W
#define MPU6050_I2C_SLV4_REG       0x32   // R/W
#define MPU6050_I2C_SLV4_DO        0x33   // R/W
#define MPU6050_I2C_SLV4_CTRL      0x34   // R/W
#define MPU6050_I2C_SLV4_DI        0x35   // R  
#define MPU6050_I2C_MST_STATUS     0x36   // R
#define MPU6050_INT_PIN_CFG        0x37   // R/W
#define MPU6050_INT_ENABLE         0x38   // R/W
#define MPU6050_INT_STATUS         0x3A   // R  
#define MPU6050_ACCEL_XOUT_H       0x3B   // R  
#define MPU6050_ACCEL_XOUT_L       0x3C   // R  
#define MPU6050_ACCEL_YOUT_H       0x3D   // R  
#define MPU6050_ACCEL_YOUT_L       0x3E   // R  
#define MPU6050_ACCEL_ZOUT_H       0x3F   // R  
#define MPU6050_ACCEL_ZOUT_L       0x40   // R  
#define MPU6050_TEMP_OUT_H         0x41   // R  
#define MPU6050_TEMP_OUT_L         0x42   // R  
#define MPU6050_GYRO_XOUT_H        0x43   // R  
#define MPU6050_GYRO_XOUT_L        0x44   // R  
#define MPU6050_GYRO_YOUT_H        0x45   // R  
#define MPU6050_GYRO_YOUT_L        0x46   // R  
#define MPU6050_GYRO_ZOUT_H        0x47   // R  
#define MPU6050_GYRO_ZOUT_L        0x48   // R  
#define MPU6050_EXT_SENS_DATA_00   0x49   // R  
#define MPU6050_EXT_SENS_DATA_01   0x4A   // R  
#define MPU6050_EXT_SENS_DATA_02   0x4B   // R  
#define MPU6050_EXT_SENS_DATA_03   0x4C   // R  
#define MPU6050_EXT_SENS_DATA_04   0x4D   // R  
#define MPU6050_EXT_SENS_DATA_05   0x4E   // R  
#define MPU6050_EXT_SENS_DATA_06   0x4F   // R  
#define MPU6050_EXT_SENS_DATA_07   0x50   // R  
#define MPU6050_EXT_SENS_DATA_08   0x51   // R  
#define MPU6050_EXT_SENS_DATA_09   0x52   // R  
#define MPU6050_EXT_SENS_DATA_10   0x53   // R  
#define MPU6050_EXT_SENS_DATA_11   0x54   // R  
#define MPU6050_EXT_SENS_DATA_12   0x55   // R  
#define MPU6050_EXT_SENS_DATA_13   0x56   // R  
#define MPU6050_EXT_SENS_DATA_14   0x57   // R  
#define MPU6050_EXT_SENS_DATA_15   0x58   // R  
#define MPU6050_EXT_SENS_DATA_16   0x59   // R  
#define MPU6050_EXT_SENS_DATA_17   0x5A   // R  
#define MPU6050_EXT_SENS_DATA_18   0x5B   // R  
#define MPU6050_EXT_SENS_DATA_19   0x5C   // R  
#define MPU6050_EXT_SENS_DATA_20   0x5D   // R  
#define MPU6050_EXT_SENS_DATA_21   0x5E   // R  
#define MPU6050_EXT_SENS_DATA_22   0x5F   // R  
#define MPU6050_EXT_SENS_DATA_23   0x60   // R  
#define MPU6050_MOT_DETECT_STATUS  0x61   // R  
#define MPU6050_I2C_SLV0_DO        0x63   // R/W
#define MPU6050_I2C_SLV1_DO        0x64   // R/W
#define MPU6050_I2C_SLV2_DO        0x65   // R/W
#define MPU6050_I2C_SLV3_DO        0x66   // R/W
#define MPU6050_I2C_MST_DELAY_CTRL 0x67   // R/W
#define MPU6050_SIGNAL_PATH_RESET  0x68   // R/W
#define MPU6050_MOT_DETECT_CTRL    0x69   // R/W
#define MPU6050_USER_CTRL          0x6A   // R/W
#define MPU6050_PWR_MGMT_1         0x6B   // R/W
#define MPU6050_PWR_MGMT_2         0x6C   // R/W
#define MPU6050_FIFO_COUNTH        0x72   // R/W
#define MPU6050_FIFO_COUNTL        0x73   // R/W
#define MPU6050_FIFO_R_W           0x74   // R/W
#define MPU6050_WHO_AM_I           0x75   // R
 
 
// Defines for the bits, to be able to change
// between bit number and binary definition.
// By using the bit number, programming the sensor
// is like programming the AVR microcontroller.
// But instead of using "(1<<X)", or "_BV(X)",
// the Arduino "bit(X)" is used.
#define MPU6050_D0 0
#define MPU6050_D1 1
#define MPU6050_D2 2
#define MPU6050_D3 3
#define MPU6050_D4 4
#define MPU6050_D5 5
#define MPU6050_D6 6
#define MPU6050_D7 7
 
// AUX_VDDIO Register
#define MPU6050_AUX_VDDIO MPU6050_D7  // I2C high: 1=VDD, 0=VLOGIC
 
// CONFIG Register
// DLPF is Digital Low Pass Filter for both gyro and accelerometers.
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_DLPF_CFG0     MPU6050_D0
#define MPU6050_DLPF_CFG1     MPU6050_D1
#define MPU6050_DLPF_CFG2     MPU6050_D2
#define MPU6050_EXT_SYNC_SET0 MPU6050_D3
#define MPU6050_EXT_SYNC_SET1 MPU6050_D4
#define MPU6050_EXT_SYNC_SET2 MPU6050_D5
 
// Combined definitions for the EXT_SYNC_SET values
#define MPU6050_EXT_SYNC_SET_0 (0)
#define MPU6050_EXT_SYNC_SET_1 (bit(MPU6050_EXT_SYNC_SET0))
#define MPU6050_EXT_SYNC_SET_2 (bit(MPU6050_EXT_SYNC_SET1))
#define MPU6050_EXT_SYNC_SET_3 (bit(MPU6050_EXT_SYNC_SET1)|bit(MPU6050_EXT_SYNC_SET0))
#define MPU6050_EXT_SYNC_SET_4 (bit(MPU6050_EXT_SYNC_SET2))
#define MPU6050_EXT_SYNC_SET_5 (bit(MPU6050_EXT_SYNC_SET2)|bit(MPU6050_EXT_SYNC_SET0))
#define MPU6050_EXT_SYNC_SET_6 (bit(MPU6050_EXT_SYNC_SET2)|bit(MPU6050_EXT_SYNC_SET1))
#define MPU6050_EXT_SYNC_SET_7 (bit(MPU6050_EXT_SYNC_SET2)|bit(MPU6050_EXT_SYNC_SET1)|bit(MPU6050_EXT_SYNC_SET0))
 
// Alternative names for the combined definitions.
#define MPU6050_EXT_SYNC_DISABLED     MPU6050_EXT_SYNC_SET_0
#define MPU6050_EXT_SYNC_TEMP_OUT_L   MPU6050_EXT_SYNC_SET_1
#define MPU6050_EXT_SYNC_GYRO_XOUT_L  MPU6050_EXT_SYNC_SET_2
#define MPU6050_EXT_SYNC_GYRO_YOUT_L  MPU6050_EXT_SYNC_SET_3
#define MPU6050_EXT_SYNC_GYRO_ZOUT_L  MPU6050_EXT_SYNC_SET_4
#define MPU6050_EXT_SYNC_ACCEL_XOUT_L MPU6050_EXT_SYNC_SET_5
#define MPU6050_EXT_SYNC_ACCEL_YOUT_L MPU6050_EXT_SYNC_SET_6
#define MPU6050_EXT_SYNC_ACCEL_ZOUT_L MPU6050_EXT_SYNC_SET_7
 
// Combined definitions for the DLPF_CFG values
#define MPU6050_DLPF_CFG_0 (0)
#define MPU6050_DLPF_CFG_1 (bit(MPU6050_DLPF_CFG0))
#define MPU6050_DLPF_CFG_2 (bit(MPU6050_DLPF_CFG1))
#define MPU6050_DLPF_CFG_3 (bit(MPU6050_DLPF_CFG1)|bit(MPU6050_DLPF_CFG0))
#define MPU6050_DLPF_CFG_4 (bit(MPU6050_DLPF_CFG2))
#define MPU6050_DLPF_CFG_5 (bit(MPU6050_DLPF_CFG2)|bit(MPU6050_DLPF_CFG0))
#define MPU6050_DLPF_CFG_6 (bit(MPU6050_DLPF_CFG2)|bit(MPU6050_DLPF_CFG1))
#define MPU6050_DLPF_CFG_7 (bit(MPU6050_DLPF_CFG2)|bit(MPU6050_DLPF_CFG1)|bit(MPU6050_DLPF_CFG0))
 
// Alternative names for the combined definitions
// This name uses the bandwidth (Hz) for the accelometer,
// for the gyro the bandwidth is almost the same.
#define MPU6050_DLPF_260HZ    MPU6050_DLPF_CFG_0
#define MPU6050_DLPF_184HZ    MPU6050_DLPF_CFG_1
#define MPU6050_DLPF_94HZ     MPU6050_DLPF_CFG_2
#define MPU6050_DLPF_44HZ     MPU6050_DLPF_CFG_3
#define MPU6050_DLPF_21HZ     MPU6050_DLPF_CFG_4
#define MPU6050_DLPF_10HZ     MPU6050_DLPF_CFG_5
#define MPU6050_DLPF_5HZ      MPU6050_DLPF_CFG_6
#define MPU6050_DLPF_RESERVED MPU6050_DLPF_CFG_7
 
// GYRO_CONFIG Register
// The XG_ST, YG_ST, ZG_ST are bits for selftest.
// The FS_SEL sets the range for the gyro.
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_FS_SEL0 MPU6050_D3
#define MPU6050_FS_SEL1 MPU6050_D4
#define MPU6050_ZG_ST   MPU6050_D5
#define MPU6050_YG_ST   MPU6050_D6
#define MPU6050_XG_ST   MPU6050_D7
 
// Combined definitions for the FS_SEL values
#define MPU6050_FS_SEL_0 (0)
#define MPU6050_FS_SEL_1 (bit(MPU6050_FS_SEL0))
#define MPU6050_FS_SEL_2 (bit(MPU6050_FS_SEL1))
#define MPU6050_FS_SEL_3 (bit(MPU6050_FS_SEL1)|bit(MPU6050_FS_SEL0))
 
// Alternative names for the combined definitions
// The name uses the range in degrees per second.
#define MPU6050_FS_SEL_250  MPU6050_FS_SEL_0
#define MPU6050_FS_SEL_500  MPU6050_FS_SEL_1
#define MPU6050_FS_SEL_1000 MPU6050_FS_SEL_2
#define MPU6050_FS_SEL_2000 MPU6050_FS_SEL_3
 
// ACCEL_CONFIG Register
// The XA_ST, YA_ST, ZA_ST are bits for selftest.
// The AFS_SEL sets the range for the accelerometer.
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_ACCEL_HPF0 MPU6050_D0
#define MPU6050_ACCEL_HPF1 MPU6050_D1
#define MPU6050_ACCEL_HPF2 MPU6050_D2
#define MPU6050_AFS_SEL0   MPU6050_D3
#define MPU6050_AFS_SEL1   MPU6050_D4
#define MPU6050_ZA_ST      MPU6050_D5
#define MPU6050_YA_ST      MPU6050_D6
#define MPU6050_XA_ST      MPU6050_D7
 
// Combined definitions for the ACCEL_HPF values
#define MPU6050_ACCEL_HPF_0 (0)
#define MPU6050_ACCEL_HPF_1 (bit(MPU6050_ACCEL_HPF0))
#define MPU6050_ACCEL_HPF_2 (bit(MPU6050_ACCEL_HPF1))
#define MPU6050_ACCEL_HPF_3 (bit(MPU6050_ACCEL_HPF1)|bit(MPU6050_ACCEL_HPF0))
#define MPU6050_ACCEL_HPF_4 (bit(MPU6050_ACCEL_HPF2))
#define MPU6050_ACCEL_HPF_7 (bit(MPU6050_ACCEL_HPF2)|bit(MPU6050_ACCEL_HPF1)|bit(MPU6050_ACCEL_HPF0))
 
// Alternative names for the combined definitions
// The name uses the Cut-off frequency.
#define MPU6050_ACCEL_HPF_RESET  MPU6050_ACCEL_HPF_0
#define MPU6050_ACCEL_HPF_5HZ    MPU6050_ACCEL_HPF_1
#define MPU6050_ACCEL_HPF_2_5HZ  MPU6050_ACCEL_HPF_2
#define MPU6050_ACCEL_HPF_1_25HZ MPU6050_ACCEL_HPF_3
#define MPU6050_ACCEL_HPF_0_63HZ MPU6050_ACCEL_HPF_4
#define MPU6050_ACCEL_HPF_HOLD   MPU6050_ACCEL_HPF_7
 
// Combined definitions for the AFS_SEL values
#define MPU6050_AFS_SEL_0 (0)
#define MPU6050_AFS_SEL_1 (bit(MPU6050_AFS_SEL0))
#define MPU6050_AFS_SEL_2 (bit(MPU6050_AFS_SEL1))
#define MPU6050_AFS_SEL_3 (bit(MPU6050_AFS_SEL1)|bit(MPU6050_AFS_SEL0))
 
// Alternative names for the combined definitions
// The name uses the full scale range for the accelerometer.
#define MPU6050_AFS_SEL_2G  MPU6050_AFS_SEL_0
#define MPU6050_AFS_SEL_4G  MPU6050_AFS_SEL_1
#define MPU6050_AFS_SEL_8G  MPU6050_AFS_SEL_2
#define MPU6050_AFS_SEL_16G MPU6050_AFS_SEL_3
 
// FIFO_EN Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_SLV0_FIFO_EN  MPU6050_D0
#define MPU6050_SLV1_FIFO_EN  MPU6050_D1
#define MPU6050_SLV2_FIFO_EN  MPU6050_D2
#define MPU6050_ACCEL_FIFO_EN MPU6050_D3
#define MPU6050_ZG_FIFO_EN    MPU6050_D4
#define MPU6050_YG_FIFO_EN    MPU6050_D5
#define MPU6050_XG_FIFO_EN    MPU6050_D6
#define MPU6050_TEMP_FIFO_EN  MPU6050_D7
 
// I2C_MST_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_MST_CLK0  MPU6050_D0
#define MPU6050_I2C_MST_CLK1  MPU6050_D1
#define MPU6050_I2C_MST_CLK2  MPU6050_D2
#define MPU6050_I2C_MST_CLK3  MPU6050_D3
#define MPU6050_I2C_MST_P_NSR MPU6050_D4
#define MPU6050_SLV_3_FIFO_EN MPU6050_D5
#define MPU6050_WAIT_FOR_ES   MPU6050_D6
#define MPU6050_MULT_MST_EN   MPU6050_D7
 
// Combined definitions for the I2C_MST_CLK
#define MPU6050_I2C_MST_CLK_0 (0)
#define MPU6050_I2C_MST_CLK_1  (bit(MPU6050_I2C_MST_CLK0))
#define MPU6050_I2C_MST_CLK_2  (bit(MPU6050_I2C_MST_CLK1))
#define MPU6050_I2C_MST_CLK_3  (bit(MPU6050_I2C_MST_CLK1)|bit(MPU6050_I2C_MST_CLK0))
#define MPU6050_I2C_MST_CLK_4  (bit(MPU6050_I2C_MST_CLK2))
#define MPU6050_I2C_MST_CLK_5  (bit(MPU6050_I2C_MST_CLK2)|bit(MPU6050_I2C_MST_CLK0))
#define MPU6050_I2C_MST_CLK_6  (bit(MPU6050_I2C_MST_CLK2)|bit(MPU6050_I2C_MST_CLK1))
#define MPU6050_I2C_MST_CLK_7  (bit(MPU6050_I2C_MST_CLK2)|bit(MPU6050_I2C_MST_CLK1)|bit(MPU6050_I2C_MST_CLK0))
#define MPU6050_I2C_MST_CLK_8  (bit(MPU6050_I2C_MST_CLK3))
#define MPU6050_I2C_MST_CLK_9  (bit(MPU6050_I2C_MST_CLK3)|bit(MPU6050_I2C_MST_CLK0))
#define MPU6050_I2C_MST_CLK_10 (bit(MPU6050_I2C_MST_CLK3)|bit(MPU6050_I2C_MST_CLK1))
#define MPU6050_I2C_MST_CLK_11 (bit(MPU6050_I2C_MST_CLK3)|bit(MPU6050_I2C_MST_CLK1)|bit(MPU6050_I2C_MST_CLK0))
#define MPU6050_I2C_MST_CLK_12 (bit(MPU6050_I2C_MST_CLK3)|bit(MPU6050_I2C_MST_CLK2))
#define MPU6050_I2C_MST_CLK_13 (bit(MPU6050_I2C_MST_CLK3)|bit(MPU6050_I2C_MST_CLK2)|bit(MPU6050_I2C_MST_CLK0))
#define MPU6050_I2C_MST_CLK_14 (bit(MPU6050_I2C_MST_CLK3)|bit(MPU6050_I2C_MST_CLK2)|bit(MPU6050_I2C_MST_CLK1))
#define MPU6050_I2C_MST_CLK_15 (bit(MPU6050_I2C_MST_CLK3)|bit(MPU6050_I2C_MST_CLK2)|bit(MPU6050_I2C_MST_CLK1)|bit(MPU6050_I2C_MST_CLK0))
 
// Alternative names for the combined definitions
// The names uses I2C Master Clock Speed in kHz.
#define MPU6050_I2C_MST_CLK_348KHZ MPU6050_I2C_MST_CLK_0
#define MPU6050_I2C_MST_CLK_333KHZ MPU6050_I2C_MST_CLK_1
#define MPU6050_I2C_MST_CLK_320KHZ MPU6050_I2C_MST_CLK_2
#define MPU6050_I2C_MST_CLK_308KHZ MPU6050_I2C_MST_CLK_3
#define MPU6050_I2C_MST_CLK_296KHZ MPU6050_I2C_MST_CLK_4
#define MPU6050_I2C_MST_CLK_286KHZ MPU6050_I2C_MST_CLK_5
#define MPU6050_I2C_MST_CLK_276KHZ MPU6050_I2C_MST_CLK_6
#define MPU6050_I2C_MST_CLK_267KHZ MPU6050_I2C_MST_CLK_7
#define MPU6050_I2C_MST_CLK_258KHZ MPU6050_I2C_MST_CLK_8
#define MPU6050_I2C_MST_CLK_500KHZ MPU6050_I2C_MST_CLK_9
#define MPU6050_I2C_MST_CLK_471KHZ MPU6050_I2C_MST_CLK_10
#define MPU6050_I2C_MST_CLK_444KHZ MPU6050_I2C_MST_CLK_11
#define MPU6050_I2C_MST_CLK_421KHZ MPU6050_I2C_MST_CLK_12
#define MPU6050_I2C_MST_CLK_400KHZ MPU6050_I2C_MST_CLK_13
#define MPU6050_I2C_MST_CLK_381KHZ MPU6050_I2C_MST_CLK_14
#define MPU6050_I2C_MST_CLK_364KHZ MPU6050_I2C_MST_CLK_15
 
// I2C_SLV0_ADDR Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV0_RW MPU6050_D7
 
// I2C_SLV0_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV0_LEN0    MPU6050_D0
#define MPU6050_I2C_SLV0_LEN1    MPU6050_D1
#define MPU6050_I2C_SLV0_LEN2    MPU6050_D2
#define MPU6050_I2C_SLV0_LEN3    MPU6050_D3
#define MPU6050_I2C_SLV0_GRP     MPU6050_D4
#define MPU6050_I2C_SLV0_REG_DIS MPU6050_D5
#define MPU6050_I2C_SLV0_BYTE_SW MPU6050_D6
#define MPU6050_I2C_SLV0_EN      MPU6050_D7
 
// A mask for the length
#define MPU6050_I2C_SLV0_LEN_MASK 0x0F
 
// I2C_SLV1_ADDR Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV1_RW MPU6050_D7
 
// I2C_SLV1_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV1_LEN0    MPU6050_D0
#define MPU6050_I2C_SLV1_LEN1    MPU6050_D1
#define MPU6050_I2C_SLV1_LEN2    MPU6050_D2
#define MPU6050_I2C_SLV1_LEN3    MPU6050_D3
#define MPU6050_I2C_SLV1_GRP     MPU6050_D4
#define MPU6050_I2C_SLV1_REG_DIS MPU6050_D5
#define MPU6050_I2C_SLV1_BYTE_SW MPU6050_D6
#define MPU6050_I2C_SLV1_EN      MPU6050_D7
 
// A mask for the length
#define MPU6050_I2C_SLV1_LEN_MASK 0x0F
 
// I2C_SLV2_ADDR Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV2_RW MPU6050_D7
 
// I2C_SLV2_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV2_LEN0    MPU6050_D0
#define MPU6050_I2C_SLV2_LEN1    MPU6050_D1
#define MPU6050_I2C_SLV2_LEN2    MPU6050_D2
#define MPU6050_I2C_SLV2_LEN3    MPU6050_D3
#define MPU6050_I2C_SLV2_GRP     MPU6050_D4
#define MPU6050_I2C_SLV2_REG_DIS MPU6050_D5
#define MPU6050_I2C_SLV2_BYTE_SW MPU6050_D6
#define MPU6050_I2C_SLV2_EN      MPU6050_D7
 
// A mask for the length
#define MPU6050_I2C_SLV2_LEN_MASK 0x0F
 
// I2C_SLV3_ADDR Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV3_RW MPU6050_D7
 
// I2C_SLV3_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV3_LEN0    MPU6050_D0
#define MPU6050_I2C_SLV3_LEN1    MPU6050_D1
#define MPU6050_I2C_SLV3_LEN2    MPU6050_D2
#define MPU6050_I2C_SLV3_LEN3    MPU6050_D3
#define MPU6050_I2C_SLV3_GRP     MPU6050_D4
#define MPU6050_I2C_SLV3_REG_DIS MPU6050_D5
#define MPU6050_I2C_SLV3_BYTE_SW MPU6050_D6
#define MPU6050_I2C_SLV3_EN      MPU6050_D7
 
// A mask for the length
#define MPU6050_I2C_SLV3_LEN_MASK 0x0F
 
// I2C_SLV4_ADDR Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV4_RW MPU6050_D7
 
// I2C_SLV4_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_MST_DLY0     MPU6050_D0
#define MPU6050_I2C_MST_DLY1     MPU6050_D1
#define MPU6050_I2C_MST_DLY2     MPU6050_D2
#define MPU6050_I2C_MST_DLY3     MPU6050_D3
#define MPU6050_I2C_MST_DLY4     MPU6050_D4
#define MPU6050_I2C_SLV4_REG_DIS MPU6050_D5
#define MPU6050_I2C_SLV4_INT_EN  MPU6050_D6
#define MPU6050_I2C_SLV4_EN      MPU6050_D7
 
// A mask for the delay
#define MPU6050_I2C_MST_DLY_MASK 0x1F
 
// I2C_MST_STATUS Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV0_NACK MPU6050_D0
#define MPU6050_I2C_SLV1_NACK MPU6050_D1
#define MPU6050_I2C_SLV2_NACK MPU6050_D2
#define MPU6050_I2C_SLV3_NACK MPU6050_D3
#define MPU6050_I2C_SLV4_NACK MPU6050_D4
#define MPU6050_I2C_LOST_ARB  MPU6050_D5
#define MPU6050_I2C_SLV4_DONE MPU6050_D6
#define MPU6050_PASS_THROUGH  MPU6050_D7
 
// I2C_PIN_CFG Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_CLKOUT_EN       MPU6050_D0
#define MPU6050_I2C_BYPASS_EN   MPU6050_D1
#define MPU6050_FSYNC_INT_EN    MPU6050_D2
#define MPU6050_FSYNC_INT_LEVEL MPU6050_D3
#define MPU6050_INT_RD_CLEAR    MPU6050_D4
#define MPU6050_LATCH_INT_EN    MPU6050_D5
#define MPU6050_INT_OPEN        MPU6050_D6
#define MPU6050_INT_LEVEL       MPU6050_D7
 
// INT_ENABLE Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_DATA_RDY_EN    MPU6050_D0
#define MPU6050_I2C_MST_INT_EN MPU6050_D3
#define MPU6050_FIFO_OFLOW_EN  MPU6050_D4
#define MPU6050_ZMOT_EN        MPU6050_D5
#define MPU6050_MOT_EN         MPU6050_D6
#define MPU6050_FF_EN          MPU6050_D7
 
// INT_STATUS Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_DATA_RDY_INT   MPU6050_D0
#define MPU6050_I2C_MST_INT    MPU6050_D3
#define MPU6050_FIFO_OFLOW_INT MPU6050_D4
#define MPU6050_ZMOT_INT       MPU6050_D5
#define MPU6050_MOT_INT        MPU6050_D6
#define MPU6050_FF_INT         MPU6050_D7
 
// MOT_DETECT_STATUS Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_MOT_ZRMOT MPU6050_D0
#define MPU6050_MOT_ZPOS  MPU6050_D2
#define MPU6050_MOT_ZNEG  MPU6050_D3
#define MPU6050_MOT_YPOS  MPU6050_D4
#define MPU6050_MOT_YNEG  MPU6050_D5
#define MPU6050_MOT_XPOS  MPU6050_D6
#define MPU6050_MOT_XNEG  MPU6050_D7
 
// IC2_MST_DELAY_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_I2C_SLV0_DLY_EN MPU6050_D0
#define MPU6050_I2C_SLV1_DLY_EN MPU6050_D1
#define MPU6050_I2C_SLV2_DLY_EN MPU6050_D2
#define MPU6050_I2C_SLV3_DLY_EN MPU6050_D3
#define MPU6050_I2C_SLV4_DLY_EN MPU6050_D4
#define MPU6050_DELAY_ES_SHADOW MPU6050_D7
 
// SIGNAL_PATH_RESET Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_TEMP_RESET  MPU6050_D0
#define MPU6050_ACCEL_RESET MPU6050_D1
#define MPU6050_GYRO_RESET  MPU6050_D2
 
// MOT_DETECT_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_MOT_COUNT0      MPU6050_D0
#define MPU6050_MOT_COUNT1      MPU6050_D1
#define MPU6050_FF_COUNT0       MPU6050_D2
#define MPU6050_FF_COUNT1       MPU6050_D3
#define MPU6050_ACCEL_ON_DELAY0 MPU6050_D4
#define MPU6050_ACCEL_ON_DELAY1 MPU6050_D5
 
// Combined definitions for the MOT_COUNT
#define MPU6050_MOT_COUNT_0 (0)
#define MPU6050_MOT_COUNT_1 (bit(MPU6050_MOT_COUNT0))
#define MPU6050_MOT_COUNT_2 (bit(MPU6050_MOT_COUNT1))
#define MPU6050_MOT_COUNT_3 (bit(MPU6050_MOT_COUNT1)|bit(MPU6050_MOT_COUNT0))
 
// Alternative names for the combined definitions
#define MPU6050_MOT_COUNT_RESET MPU6050_MOT_COUNT_0
 
// Combined definitions for the FF_COUNT
#define MPU6050_FF_COUNT_0 (0)
#define MPU6050_FF_COUNT_1 (bit(MPU6050_FF_COUNT0))
#define MPU6050_FF_COUNT_2 (bit(MPU6050_FF_COUNT1))
#define MPU6050_FF_COUNT_3 (bit(MPU6050_FF_COUNT1)|bit(MPU6050_FF_COUNT0))
 
// Alternative names for the combined definitions
#define MPU6050_FF_COUNT_RESET MPU6050_FF_COUNT_0
 
// Combined definitions for the ACCEL_ON_DELAY
#define MPU6050_ACCEL_ON_DELAY_0 (0)
#define MPU6050_ACCEL_ON_DELAY_1 (bit(MPU6050_ACCEL_ON_DELAY0))
#define MPU6050_ACCEL_ON_DELAY_2 (bit(MPU6050_ACCEL_ON_DELAY1))
#define MPU6050_ACCEL_ON_DELAY_3 (bit(MPU6050_ACCEL_ON_DELAY1)|bit(MPU6050_ACCEL_ON_DELAY0))
 
// Alternative names for the ACCEL_ON_DELAY
#define MPU6050_ACCEL_ON_DELAY_0MS MPU6050_ACCEL_ON_DELAY_0
#define MPU6050_ACCEL_ON_DELAY_1MS MPU6050_ACCEL_ON_DELAY_1
#define MPU6050_ACCEL_ON_DELAY_2MS MPU6050_ACCEL_ON_DELAY_2
#define MPU6050_ACCEL_ON_DELAY_3MS MPU6050_ACCEL_ON_DELAY_3
 
// USER_CTRL Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_SIG_COND_RESET MPU6050_D0
#define MPU6050_I2C_MST_RESET  MPU6050_D1
#define MPU6050_FIFO_RESET     MPU6050_D2
#define MPU6050_I2C_IF_DIS     MPU6050_D4   // must be 0 for MPU-6050
#define MPU6050_I2C_MST_EN     MPU6050_D5
#define MPU6050_FIFO_EN        MPU6050_D6
 
// PWR_MGMT_1 Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_CLKSEL0      MPU6050_D0
#define MPU6050_CLKSEL1      MPU6050_D1
#define MPU6050_CLKSEL2      MPU6050_D2
#define MPU6050_TEMP_DIS     MPU6050_D3    // 1: disable temperature sensor
#define MPU6050_CYCLE        MPU6050_D5    // 1: sample and sleep
#define MPU6050_SLEEP        MPU6050_D6    // 1: sleep mode
#define MPU6050_DEVICE_RESET MPU6050_D7    // 1: reset to default values
 
// Combined definitions for the CLKSEL
#define MPU6050_CLKSEL_0 (0)
#define MPU6050_CLKSEL_1 (bit(MPU6050_CLKSEL0))
#define MPU6050_CLKSEL_2 (bit(MPU6050_CLKSEL1))
#define MPU6050_CLKSEL_3 (bit(MPU6050_CLKSEL1)|bit(MPU6050_CLKSEL0))
#define MPU6050_CLKSEL_4 (bit(MPU6050_CLKSEL2))
#define MPU6050_CLKSEL_5 (bit(MPU6050_CLKSEL2)|bit(MPU6050_CLKSEL0))
#define MPU6050_CLKSEL_6 (bit(MPU6050_CLKSEL2)|bit(MPU6050_CLKSEL1))
#define MPU6050_CLKSEL_7 (bit(MPU6050_CLKSEL2)|bit(MPU6050_CLKSEL1)|bit(MPU6050_CLKSEL0))
 
// Alternative names for the combined definitions
#define MPU6050_CLKSEL_INTERNAL    MPU6050_CLKSEL_0
#define MPU6050_CLKSEL_X           MPU6050_CLKSEL_1
#define MPU6050_CLKSEL_Y           MPU6050_CLKSEL_2
#define MPU6050_CLKSEL_Z           MPU6050_CLKSEL_3
#define MPU6050_CLKSEL_EXT_32KHZ   MPU6050_CLKSEL_4
#define MPU6050_CLKSEL_EXT_19_2MHZ MPU6050_CLKSEL_5
#define MPU6050_CLKSEL_RESERVED    MPU6050_CLKSEL_6
#define MPU6050_CLKSEL_STOP        MPU6050_CLKSEL_7
 
// PWR_MGMT_2 Register
// These are the names for the bits.
// Use these only with the bit() macro.
#define MPU6050_STBY_ZG       MPU6050_D0
#define MPU6050_STBY_YG       MPU6050_D1
#define MPU6050_STBY_XG       MPU6050_D2
#define MPU6050_STBY_ZA       MPU6050_D3
#define MPU6050_STBY_YA       MPU6050_D4
#define MPU6050_STBY_XA       MPU6050_D5
#define MPU6050_LP_WAKE_CTRL0 MPU6050_D6
#define MPU6050_LP_WAKE_CTRL1 MPU6050_D7
 
// Combined definitions for the LP_WAKE_CTRL
#define MPU6050_LP_WAKE_CTRL_0 (0)
#define MPU6050_LP_WAKE_CTRL_1 (bit(MPU6050_LP_WAKE_CTRL0))
#define MPU6050_LP_WAKE_CTRL_2 (bit(MPU6050_LP_WAKE_CTRL1))
#define MPU6050_LP_WAKE_CTRL_3 (bit(MPU6050_LP_WAKE_CTRL1)|bit(MPU6050_LP_WAKE_CTRL0))
 
// Alternative names for the combined definitions
// The names uses the Wake-up Frequency.
#define MPU6050_LP_WAKE_1_25HZ MPU6050_LP_WAKE_CTRL_0
#define MPU6050_LP_WAKE_2_5HZ  MPU6050_LP_WAKE_CTRL_1
#define MPU6050_LP_WAKE_5HZ    MPU6050_LP_WAKE_CTRL_2
#define MPU6050_LP_WAKE_10HZ   MPU6050_LP_WAKE_CTRL_3
 
 
// Default I2C address for the MPU-6050 is 0x68.
// But only if the AD0 pin is low.
// Some sensor boards have AD0 high, and the
// I2C address thus becomes 0x69.
#define MPU6050_I2C_ADDRESS 0x68
 
 
// Declaring an union for the registers and the axis values.
// The byte order does not match the byte order of
// the compiler and AVR chip.
// The AVR chip (on the Arduino board) has the Low Byte
// at the lower address.
// But the MPU-6050 has a different order: High Byte at
// lower address, so that has to be corrected.
// The register part "reg" is only used internally,
// and are swapped in code.
typedef union accel_t_gyro_union
{
  struct
  {
    uint8_t x_accel_h;
    uint8_t x_accel_l;
    uint8_t y_accel_h;
    uint8_t y_accel_l;
    uint8_t z_accel_h;
    uint8_t z_accel_l;
    uint8_t t_h;
    uint8_t t_l;
    uint8_t x_gyro_h;
    uint8_t x_gyro_l;
    uint8_t y_gyro_h;
    uint8_t y_gyro_l;
    uint8_t z_gyro_h;
    uint8_t z_gyro_l;
  } reg;
  struct
  {
    int16_t x_accel;
    int16_t y_accel;
    int16_t z_accel;
    int16_t temperature;
    int16_t x_gyro;
    int16_t y_gyro;
    int16_t z_gyro;
  } value;
};
 
 
void setup()
{      
  int error;
  uint8_t c;
 
 
  Serial.begin(230400);
  Serial.println(F("InvenSense MPU-6050"));
  Serial.println(F("June 2012"));
 
  // Initialize the \'Wire\' class for the I2C-bus.
  Wire.begin();
 
 
  // default at power-up:
  //    Gyro at 250 degrees second
  //    Acceleration at 2g
  //    Clock source at internal 8MHz
  //    The device is in sleep mode.
  //
 
  error = MPU6050_read (MPU6050_WHO_AM_I, &c, 1);
  Serial.print(F("WHO_AM_I : "));
  Serial.print(c,HEX);
  Serial.print(F(", error = "));
  Serial.println(error,DEC);
 
  // According to the datasheet, the \'sleep\' bit
  // should read a \'1\'.
  // That bit has to be cleared, since the sensor
  // is in sleep mode at power-up.
  error = MPU6050_read (MPU6050_PWR_MGMT_1, &c, 1);
  Serial.print(F("PWR_MGMT_1 : "));
  Serial.print(c,HEX);
  Serial.print(F(", error = "));
  Serial.println(error,DEC);
 
 
  // Clear the \'sleep\' bit to start the sensor.
  MPU6050_write_reg (MPU6050_PWR_MGMT_1, 0);
}
 
 
void loop()
{
  int error;
  double dT;
  accel_t_gyro_union accel_t_gyro;
 
 
//  Serial.println(F(""));
//  Serial.println(F("MPU-6050"));
// 
  // Read the raw values.
  // Read 14 bytes at once,
  // containing acceleration, temperature and gyro.
  // With the default settings of the MPU-6050,
  // there is no filter enabled, and the values
  // are not very stable.
  error = MPU6050_read (MPU6050_ACCEL_XOUT_H, (uint8_t *) &accel_t_gyro, sizeof(accel_t_gyro));
//  Serial.print(F("Read accel, temp and gyro, error = "));
//  Serial.println(error,DEC);
 
 
  // Swap all high and low bytes.
  // After this, the registers values are swapped,
  // so the structure name like x_accel_l does no
  // longer contain the lower byte.
  uint8_t swap;
  #define SWAP(x,y) swap = x; x = y; y = swap
 
  SWAP (accel_t_gyro.reg.x_accel_h, accel_t_gyro.reg.x_accel_l);
  SWAP (accel_t_gyro.reg.y_accel_h, accel_t_gyro.reg.y_accel_l);
  SWAP (accel_t_gyro.reg.z_accel_h, accel_t_gyro.reg.z_accel_l);
  SWAP (accel_t_gyro.reg.t_h, accel_t_gyro.reg.t_l);
  SWAP (accel_t_gyro.reg.x_gyro_h, accel_t_gyro.reg.x_gyro_l);
  SWAP (accel_t_gyro.reg.y_gyro_h, accel_t_gyro.reg.y_gyro_l);
  SWAP (accel_t_gyro.reg.z_gyro_h, accel_t_gyro.reg.z_gyro_l);
 
 
  // Print the raw acceleration values
 
  //Serial.print(F("accel x,y,z: "));
  Serial.print(accel_t_gyro.value.x_accel, DEC);
  Serial.print(F(" "));
  Serial.print(accel_t_gyro.value.y_accel, DEC);
  Serial.print(F(" "));
  Serial.print(accel_t_gyro.value.z_accel, DEC);
  Serial.println(F(" "));
 
 
  // The temperature sensor is -40 to +85 degrees Celsius.
  // It is a signed integer.
  // According to the datasheet:
  //   340 per degrees Celsius, -512 at 35 degrees.
  // At 0 degrees: -512 - (340 * 35) = -12412
 
//  Serial.print(F("temperature: "));
//  dT = ( (double) accel_t_gyro.value.temperature + 12412.0) / 340.0;
//  Serial.print(dT, 3);
//  Serial.print(F(" degrees Celsius"));
//  Serial.println(F(" "));
 
 
  // Print the raw gyro values.
 
  //Serial.print(F("gyro x,y,z : "));
//  Serial.print(accel_t_gyro.value.x_gyro, DEC);
//  Serial.print(F(" "));
//  Serial.print(accel_t_gyro.value.y_gyro, DEC);
//  Serial.print(F(" "));
//  Serial.print(accel_t_gyro.value.z_gyro, DEC);
//  Serial.print(F(" "));

 
  //delay(1000);
}
 
 
// --------------------------------------------------------
// MPU6050_read
//
// This is a common function to read multiple bytes
// from an I2C device.
//
// It uses the boolean parameter for Wire.endTransMission()
// to be able to hold or release the I2C-bus.
// This is implemented in Arduino 1.0.1.
//
// Only this function is used to read.
// There is no function for a single byte.
//
int MPU6050_read(int start, uint8_t *buffer, int size)
{
  int i, n, error;
 
  Wire.beginTransmission(MPU6050_I2C_ADDRESS);
  n = Wire.write(start);
  if (n != 1)
    return (-10);
 
  n = Wire.endTransmission(false);    // hold the I2C-bus
  if (n != 0)
    return (n);
 
  // Third parameter is true: relase I2C-bus after data is read.
  Wire.requestFrom(MPU6050_I2C_ADDRESS, size, true);
  i = 0;
  while(Wire.available() && i<size)
  {
    buffer[i++]=Wire.read();
  }
  if ( i != size)
    return (-11);
 
  return (0);  // return : no error
}
 
 
// --------------------------------------------------------
// MPU6050_write
//
// This is a common function to write multiple bytes to an I2C device.
//
// If only a single register is written,
// use the function MPU_6050_write_reg().
//
// Parameters:
//   start : Start address, use a define for the register
//   pData : A pointer to the data to write.
//   size  : The number of bytes to write.
//
// If only a single register is written, a pointer
// to the data has to be used, and the size is
// a single byte:
//   int data = 0;        // the data to write
//   MPU6050_write (MPU6050_PWR_MGMT_1, &c, 1);
//
int MPU6050_write(int start, const uint8_t *pData, int size)
{
  int n, error;
 
  Wire.beginTransmission(MPU6050_I2C_ADDRESS);
  n = Wire.write(start);        // write the start address
  if (n != 1)
    return (-20);
 
  n = Wire.write(pData, size);  // write data bytes
  if (n != size)
    return (-21);
 
  error = Wire.endTransmission(true); // release the I2C-bus
  if (error != 0)
    return (error);
 
  return (0);         // return : no error
}
 
// --------------------------------------------------------
// MPU6050_write_reg
//
// An extra function to write a single register.
// It is just a wrapper around the MPU_6050_write()
// function, and it is only a convenient function
// to make it easier to write a single register.
//
int MPU6050_write_reg(int reg, uint8_t data)
{
  int error;
 
  error = MPU6050_write(reg, &data, 1);
 
  return (error);
}
  

  

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