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初始化定义 #ifndef _MPU6050_H #define _MPU6050_H #define PORT_USED 0 #define MPU6050_ADDRESS_AD0_LOW 0x68 // address pin low (GND), default for InvenSense evaluation board #define MPU6050_ADDRESS_AD0_HIGH 0x69 // address pin high (VCC) #define MPU6050_DEFAULT_ADDRESS (MPU6050_ADDRESS_AD0_LOW<<1) #define MPU6050_RA_XG_OFFS_TC 0x00 //[7] PWR_MODE, [6:1] XG_OFFS_TC, [0] OTP_BNK_VLD #define MPU6050_RA_YG_OFFS_TC 0x01 //[7] PWR_MODE, [6:1] YG_OFFS_TC, [0] OTP_BNK_VLD #define MPU6050_RA_ZG_OFFS_TC 0x02 //[7] PWR_MODE, [6:1] ZG_OFFS_TC, [0] OTP_BNK_VLD #define MPU6050_RA_X_FINE_GAIN 0x03 //[7:0] X_FINE_GAIN #define MPU6050_RA_Y_FINE_GAIN 0x04 //[7:0] Y_FINE_GAIN #define MPU6050_RA_Z_FINE_GAIN 0x05 //[7:0] Z_FINE_GAIN #define MPU6050_RA_XA_OFFS_H 0x06 //[15:0] XA_OFFS #define MPU6050_RA_XA_OFFS_L_TC 0x07 #define MPU6050_RA_YA_OFFS_H 0x08 //[15:0] YA_OFFS #define MPU6050_RA_YA_OFFS_L_TC 0x09 #define MPU6050_RA_ZA_OFFS_H 0x0A //[15:0] ZA_OFFS #define MPU6050_RA_ZA_OFFS_L_TC 0x0B #define MPU6050_RA_XG_OFFS_USRH 0x13 //[15:0] XG_OFFS_USR #define MPU6050_RA_XG_OFFS_USRL 0x14 #define MPU6050_RA_YG_OFFS_USRH 0x15 //[15:0] YG_OFFS_USR #define MPU6050_RA_YG_OFFS_USRL 0x16 #define MPU6050_RA_ZG_OFFS_USRH 0x17 //[15:0] ZG_OFFS_USR #define MPU6050_RA_ZG_OFFS_USRL 0x18 #define MPU6050_RA_SMPLRT_DIV 0x19 #define MPU6050_RA_CONFIG 0x1A #define MPU6050_RA_GYRO_CONFIG 0x1B #define MPU6050_RA_ACCEL_CONFIG 0x1C #define MPU6050_RA_FF_THR 0x1D #define MPU6050_RA_FF_DUR 0x1E #define MPU6050_RA_MOT_THR 0x1F #define MPU6050_RA_MOT_DUR 0x20 #define MPU6050_RA_ZRMOT_THR 0x21 #define MPU6050_RA_ZRMOT_DUR 0x22 #define MPU6050_RA_FIFO_EN 0x23 #define MPU6050_RA_I2C_MST_CTRL 0x24 #define MPU6050_RA_I2C_SLV0_ADDR 0x25 #define MPU6050_RA_I2C_SLV0_REG 0x26 #define MPU6050_RA_I2C_SLV0_CTRL 0x27 #define MPU6050_RA_I2C_SLV1_ADDR 0x28 #define MPU6050_RA_I2C_SLV1_REG 0x29 #define MPU6050_RA_I2C_SLV1_CTRL 0x2A #define MPU6050_RA_I2C_SLV2_ADDR 0x2B #define MPU6050_RA_I2C_SLV2_REG 0x2C #define MPU6050_RA_I2C_SLV2_CTRL 0x2D #define MPU6050_RA_I2C_SLV3_ADDR 0x2E #define MPU6050_RA_I2C_SLV3_REG 0x2F #define MPU6050_RA_I2C_SLV3_CTRL 0x30 #define MPU6050_RA_I2C_SLV4_ADDR 0x31 #define MPU6050_RA_I2C_SLV4_REG 0x32 #define MPU6050_RA_I2C_SLV4_DO 0x33 #define MPU6050_RA_I2C_SLV4_CTRL 0x34 #define MPU6050_RA_I2C_SLV4_DI 0x35 #define MPU6050_RA_I2C_MST_STATUS 0x36 #define MPU6050_RA_INT_PIN_CFG 0x37 #define MPU6050_RA_INT_ENABLE 0x38 #define MPU6050_RA_DMP_INT_STATUS 0x39 #define MPU6050_RA_INT_STATUS 0x3A #define MPU6050_RA_ACCEL_XOUT_H 0x3B #define MPU6050_RA_ACCEL_XOUT_L 0x3C #define MPU6050_RA_ACCEL_YOUT_H 0x3D #define MPU6050_RA_ACCEL_YOUT_L 0x3E #define MPU6050_RA_ACCEL_ZOUT_H 0x3F #define MPU6050_RA_ACCEL_ZOUT_L 0x40 #define MPU6050_RA_TEMP_OUT_H 0x41 #define MPU6050_RA_TEMP_OUT_L 0x42 #define MPU6050_RA_GYRO_XOUT_H 0x43 #define MPU6050_RA_GYRO_XOUT_L 0x44 #define MPU6050_RA_GYRO_YOUT_H 0x45 #define MPU6050_RA_GYRO_YOUT_L 0x46 #define MPU6050_RA_GYRO_ZOUT_H 0x47 #define MPU6050_RA_GYRO_ZOUT_L 0x48 #define MPU6050_RA_EXT_SENS_DATA_00 0x49 #define MPU6050_RA_EXT_SENS_DATA_01 0x4A #define MPU6050_RA_EXT_SENS_DATA_02 0x4B #define MPU6050_RA_EXT_SENS_DATA_03 0x4C #define MPU6050_RA_EXT_SENS_DATA_04 0x4D #define MPU6050_RA_EXT_SENS_DATA_05 0x4E #define MPU6050_RA_EXT_SENS_DATA_06 0x4F #define MPU6050_RA_EXT_SENS_DATA_07 0x50 #define MPU6050_RA_EXT_SENS_DATA_08 0x51 #define MPU6050_RA_EXT_SENS_DATA_09 0x52 #define MPU6050_RA_EXT_SENS_DATA_10 0x53 #define MPU6050_RA_EXT_SENS_DATA_11 0x54 #define MPU6050_RA_EXT_SENS_DATA_12 0x55 #define MPU6050_RA_EXT_SENS_DATA_13 0x56 #define MPU6050_RA_EXT_SENS_DATA_14 0x57 #define MPU6050_RA_EXT_SENS_DATA_15 0x58 #define MPU6050_RA_EXT_SENS_DATA_16 0x59 #define MPU6050_RA_EXT_SENS_DATA_17 0x5A #define MPU6050_RA_EXT_SENS_DATA_18 0x5B #define MPU6050_RA_EXT_SENS_DATA_19 0x5C #define MPU6050_RA_EXT_SENS_DATA_20 0x5D #define MPU6050_RA_EXT_SENS_DATA_21 0x5E #define MPU6050_RA_EXT_SENS_DATA_22 0x5F #define MPU6050_RA_EXT_SENS_DATA_23 0x60 #define MPU6050_RA_MOT_DETECT_STATUS 0x61 #define MPU6050_RA_I2C_SLV0_DO 0x63 #define MPU6050_RA_I2C_SLV1_DO 0x64 #define MPU6050_RA_I2C_SLV2_DO 0x65 #define MPU6050_RA_I2C_SLV3_DO 0x66 #define MPU6050_RA_I2C_MST_DELAY_CTRL 0x67 #define MPU6050_RA_SIGNAL_PATH_RESET 0x68 #define MPU6050_RA_MOT_DETECT_CTRL 0x69 #define MPU6050_RA_USER_CTRL 0x6A #define MPU6050_RA_PWR_MGMT_1 0x6B #define MPU6050_RA_PWR_MGMT_2 0x6C #define MPU6050_RA_BANK_SEL 0x6D #define MPU6050_RA_MEM_START_ADDR 0x6E #define MPU6050_RA_MEM_R_W 0x6F #define MPU6050_RA_DMP_CFG_1 0x70 #define MPU6050_RA_DMP_CFG_2 0x71 #define MPU6050_RA_FIFO_COUNTH 0x72 #define MPU6050_RA_FIFO_COUNTL 0x73 #define MPU6050_RA_FIFO_R_W 0x74 #define MPU6050_RA_WHO_AM_I 0x75 #define MPU6050_TC_PWR_MODE_BIT 7 #define MPU6050_TC_OFFSET_BIT 6 #define MPU6050_TC_OFFSET_LENGTH 6 #define MPU6050_TC_OTP_BNK_VLD_BIT 0 #define MPU6050_VDDIO_LEVEL_VLOGIC 0 #define MPU6050_VDDIO_LEVEL_VDD 1 #define MPU6050_CFG_EXT_SYNC_SET_BIT 5 #define MPU6050_CFG_EXT_SYNC_SET_LENGTH 3 #define MPU6050_CFG_DLPF_CFG_BIT 2 #define MPU6050_CFG_DLPF_CFG_LENGTH 3 #define MPU6050_EXT_SYNC_DISABLED 0x0 #define MPU6050_EXT_SYNC_TEMP_OUT_L 0x1 #define MPU6050_EXT_SYNC_GYRO_XOUT_L 0x2 #define MPU6050_EXT_SYNC_GYRO_YOUT_L 0x3 #define MPU6050_EXT_SYNC_GYRO_ZOUT_L 0x4 #define MPU6050_EXT_SYNC_ACCEL_XOUT_L 0x5 #define MPU6050_EXT_SYNC_ACCEL_YOUT_L 0x6 #define MPU6050_EXT_SYNC_ACCEL_ZOUT_L 0x7 #define MPU6050_DLPF_BW_256 0x00 #define MPU6050_DLPF_BW_188 0x01 #define MPU6050_DLPF_BW_98 0x02 #define MPU6050_DLPF_BW_42 0x03 #define MPU6050_DLPF_BW_20 0x04 #define MPU6050_DLPF_BW_10 0x05 #define MPU6050_DLPF_BW_5 0x06 #define MPU6050_GCONFIG_FS_SEL_BIT 4 #define MPU6050_GCONFIG_FS_SEL_LENGTH 2 #define MPU6050_GYRO_FS_250 0x00 #define MPU6050_GYRO_FS_500 0x01 #define MPU6050_GYRO_FS_1000 0x02 #define MPU6050_GYRO_FS_2000 0x03 #define MPU6050_ACONFIG_XA_ST_BIT 7 #define MPU6050_ACONFIG_YA_ST_BIT 6 #define MPU6050_ACONFIG_ZA_ST_BIT 5 #define MPU6050_ACONFIG_AFS_SEL_BIT 4 #define MPU6050_ACONFIG_AFS_SEL_LENGTH 2 #define MPU6050_ACONFIG_ACCEL_HPF_BIT 2 #define MPU6050_ACONFIG_ACCEL_HPF_LENGTH 3 #define MPU6050_ACCEL_FS_2 0x00 #define MPU6050_ACCEL_FS_4 0x01 #define MPU6050_ACCEL_FS_8 0x02 #define MPU6050_ACCEL_FS_16 0x03 #define MPU6050_DHPF_RESET 0x00 #define MPU6050_DHPF_5 0x01 #define MPU6050_DHPF_2P5 0x02 #define MPU6050_DHPF_1P25 0x03 #define MPU6050_DHPF_0P63 0x04 #define MPU6050_DHPF_HOLD 0x07 #define MPU6050_TEMP_FIFO_EN_BIT 7 #define MPU6050_XG_FIFO_EN_BIT 6 #define MPU6050_YG_FIFO_EN_BIT 5 #define MPU6050_ZG_FIFO_EN_BIT 4 #define MPU6050_ACCEL_FIFO_EN_BIT 3 #define MPU6050_SLV2_FIFO_EN_BIT 2 #define MPU6050_SLV1_FIFO_EN_BIT 1 #define MPU6050_SLV0_FIFO_EN_BIT 0 #define MPU6050_MULT_MST_EN_BIT 7 #define MPU6050_WAIT_FOR_ES_BIT 6 #define MPU6050_SLV_3_FIFO_EN_BIT 5 #define MPU6050_I2C_MST_P_NSR_BIT 4 #define MPU6050_I2C_MST_CLK_BIT 3 #define MPU6050_I2C_MST_CLK_LENGTH 4 #define MPU6050_CLOCK_DIV_348 0x0 #define MPU6050_CLOCK_DIV_333 0x1 #define MPU6050_CLOCK_DIV_320 0x2 #define MPU6050_CLOCK_DIV_308 0x3 #define MPU6050_CLOCK_DIV_296 0x4 #define MPU6050_CLOCK_DIV_286 0x5 #define MPU6050_CLOCK_DIV_276 0x6 #define MPU6050_CLOCK_DIV_267 0x7 #define MPU6050_CLOCK_DIV_258 0x8 #define MPU6050_CLOCK_DIV_500 0x9 #define MPU6050_CLOCK_DIV_471 0xA #define MPU6050_CLOCK_DIV_444 0xB #define MPU6050_CLOCK_DIV_421 0xC #define MPU6050_CLOCK_DIV_400 0xD #define MPU6050_CLOCK_DIV_381 0xE #define MPU6050_CLOCK_DIV_364 0xF #define MPU6050_I2C_SLV_RW_BIT 7 #define MPU6050_I2C_SLV_ADDR_BIT 6 #define MPU6050_I2C_SLV_ADDR_LENGTH 7 #define MPU6050_I2C_SLV_EN_BIT 7 #define MPU6050_I2C_SLV_BYTE_SW_BIT 6 #define MPU6050_I2C_SLV_REG_DIS_BIT 5 #define MPU6050_I2C_SLV_GRP_BIT 4 #define MPU6050_I2C_SLV_LEN_BIT 3 #define MPU6050_I2C_SLV_LEN_LENGTH 4 #define MPU6050_I2C_SLV4_RW_BIT 7 #define MPU6050_I2C_SLV4_ADDR_BIT 6 #define MPU6050_I2C_SLV4_ADDR_LENGTH 7 #define MPU6050_I2C_SLV4_EN_BIT 7 #define MPU6050_I2C_SLV4_INT_EN_BIT 6 #define MPU6050_I2C_SLV4_REG_DIS_BIT 5 #define MPU6050_I2C_SLV4_MST_DLY_BIT 4 #define MPU6050_I2C_SLV4_MST_DLY_LENGTH 5 #define MPU6050_MST_PASS_THROUGH_BIT 7 #define MPU6050_MST_I2C_SLV4_DONE_BIT 6 #define MPU6050_MST_I2C_LOST_ARB_BIT 5 #define MPU6050_MST_I2C_SLV4_NACK_BIT 4 #define MPU6050_MST_I2C_SLV3_NACK_BIT 3 #define MPU6050_MST_I2C_SLV2_NACK_BIT 2 #define MPU6050_MST_I2C_SLV1_NACK_BIT 1 #define MPU6050_MST_I2C_SLV0_NACK_BIT 0 #define MPU6050_INTCFG_INT_LEVEL_BIT 7 #define MPU6050_INTCFG_INT_OPEN_BIT 6 #define MPU6050_INTCFG_LATCH_INT_EN_BIT 5 #define MPU6050_INTCFG_INT_RD_CLEAR_BIT 4 #define MPU6050_INTCFG_FSYNC_INT_LEVEL_BIT 3 #define MPU6050_INTCFG_FSYNC_INT_EN_BIT 2 #define MPU6050_INTCFG_I2C_BYPASS_EN_BIT 1 #define MPU6050_INTCFG_CLKOUT_EN_BIT 0 #define MPU6050_INTMODE_ACTIVEHIGH 0x00 #define MPU6050_INTMODE_ACTIVELOW 0x01 #define MPU6050_INTDRV_PUSHPULL 0x00 #define MPU6050_INTDRV_OPENDRAIN 0x01 #define MPU6050_INTLATCH_50USPULSE 0x00 #define MPU6050_INTLATCH_WAITCLEAR 0x01 #define MPU6050_INTCLEAR_STATUSREAD 0x00 #define MPU6050_INTCLEAR_ANYREAD 0x01 #define MPU6050_INTERRUPT_FF_BIT 7 #define MPU6050_INTERRUPT_MOT_BIT 6 #define MPU6050_INTERRUPT_ZMOT_BIT 5 #define MPU6050_INTERRUPT_FIFO_OFLOW_BIT 4 #define MPU6050_INTERRUPT_I2C_MST_INT_BIT 3 #define MPU6050_INTERRUPT_PLL_RDY_INT_BIT 2 #define MPU6050_INTERRUPT_DMP_INT_BIT 1 #define MPU6050_INTERRUPT_DATA_RDY_BIT 0 // TODO: Need to work on DMP related things #define MPU6050_DMPINT_5_BIT 5 #define MPU6050_DMPINT_4_BIT 4 #define MPU6050_DMPINT_3_BIT 3 #define MPU6050_DMPINT_2_BIT 2 #define MPU6050_DMPINT_1_BIT 1 #define MPU6050_DMPINT_0_BIT 0 #define MPU6050_MOTION_MOT_XNEG_BIT 7 #define MPU6050_MOTION_MOT_XPOS_BIT 6 #define MPU6050_MOTION_MOT_YNEG_BIT 5 #define MPU6050_MOTION_MOT_YPOS_BIT 4 #define MPU6050_MOTION_MOT_ZNEG_BIT 3 #define MPU6050_MOTION_MOT_ZPOS_BIT 2 #define MPU6050_MOTION_MOT_ZRMOT_BIT 0 #define MPU6050_DELAYCTRL_DELAY_ES_SHADOW_BIT 7 #define MPU6050_DELAYCTRL_I2C_SLV4_DLY_EN_BIT 4 #define MPU6050_DELAYCTRL_I2C_SLV3_DLY_EN_BIT 3 #define MPU6050_DELAYCTRL_I2C_SLV2_DLY_EN_BIT 2 #define MPU6050_DELAYCTRL_I2C_SLV1_DLY_EN_BIT 1 #define MPU6050_DELAYCTRL_I2C_SLV0_DLY_EN_BIT 0 #define MPU6050_PATHRESET_GYRO_RESET_BIT 2 #define MPU6050_PATHRESET_ACCEL_RESET_BIT 1 #define MPU6050_PATHRESET_TEMP_RESET_BIT 0 #define MPU6050_DETECT_ACCEL_ON_DELAY_BIT 5 #define MPU6050_DETECT_ACCEL_ON_DELAY_LENGTH 2 #define MPU6050_DETECT_FF_COUNT_BIT 3 #define MPU6050_DETECT_FF_COUNT_LENGTH 2 #define MPU6050_DETECT_MOT_COUNT_BIT 1 #define MPU6050_DETECT_MOT_COUNT_LENGTH 2 #define MPU6050_DETECT_DECREMENT_RESET 0x0 #define MPU6050_DETECT_DECREMENT_1 0x1 #define MPU6050_DETECT_DECREMENT_2 0x2 #define MPU6050_DETECT_DECREMENT_4 0x3 #define MPU6050_USERCTRL_DMP_EN_BIT 7 #define MPU6050_USERCTRL_FIFO_EN_BIT 6 #define MPU6050_USERCTRL_I2C_MST_EN_BIT 5 #define MPU6050_USERCTRL_I2C_IF_DIS_BIT 4 #define MPU6050_USERCTRL_DMP_RESET_BIT 3 #define MPU6050_USERCTRL_FIFO_RESET_BIT 2 #define MPU6050_USERCTRL_I2C_MST_RESET_BIT 1 #define MPU6050_USERCTRL_SIG_COND_RESET_BIT 0 #define MPU6050_PWR1_DEVICE_RESET_BIT 7 #define MPU6050_PWR1_SLEEP_BIT 6 #define MPU6050_PWR1_CYCLE_BIT 5 #define MPU6050_PWR1_TEMP_DIS_BIT 3 #define MPU6050_PWR1_CLKSEL_BIT 2 #define MPU6050_PWR1_CLKSEL_LENGTH 3 #define MPU6050_CLOCK_INTERNAL 0x00 #define MPU6050_CLOCK_PLL_XGYRO 0x01 #define MPU6050_CLOCK_PLL_YGYRO 0x02 #define MPU6050_CLOCK_PLL_ZGYRO 0x03 #define MPU6050_CLOCK_PLL_EXT32K 0x04 #define MPU6050_CLOCK_PLL_EXT19M 0x05 #define MPU6050_CLOCK_KEEP_RESET 0x07 #define MPU6050_PWR2_LP_WAKE_CTRL_BIT 7 #define MPU6050_PWR2_LP_WAKE_CTRL_LENGTH 2 #define MPU6050_PWR2_STBY_XA_BIT 5 #define MPU6050_PWR2_STBY_YA_BIT 4 #define MPU6050_PWR2_STBY_ZA_BIT 3 #define MPU6050_PWR2_STBY_XG_BIT 2 #define MPU6050_PWR2_STBY_YG_BIT 1 #define MPU6050_PWR2_STBY_ZG_BIT 0 #define MPU6050_WAKE_FREQ_1P25 0x0 #define MPU6050_WAKE_FREQ_2P5 0x1 #define MPU6050_WAKE_FREQ_5 0x2 #define MPU6050_WAKE_FREQ_10 0x3 #define MPU6050_BANKSEL_PRFTCH_EN_BIT 6 #define MPU6050_BANKSEL_CFG_USER_BANK_BIT 5 #define MPU6050_BANKSEL_MEM_SEL_BIT 4 #define MPU6050_BANKSEL_MEM_SEL_LENGTH 5 #define MPU6050_WHO_AM_I_BIT 6 #define MPU6050_WHO_AM_I_LENGTH 6 #define MPU6050_DMP_MEMORY_BANKS 8 #define MPU6050_DMP_MEMORY_BANK_SIZE 256 #define MPU6050_DMP_MEMORY_CHUNK_SIZE 16 void MPU6050_Read(unsigned char SlaveAddress,unsigned char REG_Address,unsigned char readNum); void MPU6050_WriteBits(uint8_t slaveAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t data); void MPU6050_WriteBit(uint8_t slaveAddr, uint8_t regAddr, uint8_t bitNum, uint8_t data); void MPU6050_ReadBits(uint8_t slaveAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t *data); void MPU6050_Initialize(void); uint8_t MPU6050_GetDeviceID(void); uint8_t MPU6050_TestConnection(void); void MPU6050_GetRawAccelGyro(int16_t* ax, int16_t* ay, int16_t* az, int16_t* gx, int16_t* gy, int16_t* gz); #endif /***************************************************************************** ** End Of File ******************************************************************************/
MPU6050 #include "lpc17xx.h" #include "type.h" #include "i2c.h" #include "MPU6050.h" //volatile int16_t ax = 0, ay = 0, az = 0; //volatile int16_t gx = 0, gy = 0, gz = 0; extern volatile uint8_t I2CMasterBuffer[I2C_PORT_NUM][BUFSIZE]; extern volatile uint8_t I2CSlaveBuffer[I2C_PORT_NUM][BUFSIZE]; extern volatile uint32_t I2CReadLength[I2C_PORT_NUM]; extern volatile uint32_t I2CWriteLength[I2C_PORT_NUM]; void DelayI2C(uint32_t m) { uint32_t i; for(; m != 0; m--) for (i=0; i<5; i++); } void MPU6050_Read(unsigned char SlaveAddress,unsigned char REG_Address,unsigned char readNum) {// unsigned char REG_data; I2CWriteLength[PORT_USED] = 2; I2CReadLength[PORT_USED] = 0; I2CMasterBuffer[PORT_USED][0] = SlaveAddress; I2CMasterBuffer[PORT_USED][1] = REG_Address; //0x31; I2CEngine(PORT_USED); // DelayI2C(100); I2CWriteLength[PORT_USED] = 1; I2CReadLength[PORT_USED] = readNum; I2CMasterBuffer[PORT_USED][0] = SlaveAddress|0x01; I2CEngine(PORT_USED); // DelayI2C(100); I2CWriteLength[PORT_USED] = 1; I2CReadLength[PORT_USED] = 0; I2CMasterBuffer[PORT_USED][0] = SlaveAddress; I2CEngine(PORT_USED); } void MPU6050_Write(unsigned char SlaveAddress,unsigned char REG_Address,unsigned char REG_data) //void { I2CWriteLength[PORT_USED] = 3; I2CReadLength[PORT_USED] = 0; I2CMasterBuffer[PORT_USED][0] = SlaveAddress; I2CMasterBuffer[PORT_USED][1] = REG_Address;//0x31; I2CMasterBuffer[PORT_USED][2] = REG_data;//0x2B; // I2CCmd = 0x01; I2CEngine(PORT_USED); } void MPU6050_WriteBits(uint8_t slaveAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t data) { // 010 value to write // 76543210 bit numbers // xxx args: bitStart=4, length=3 // 00011100 mask byte // 10101111 original value (sample) // 10100011 original & ~mask // 10101011 masked | value uint8_t tmp; uint8_t mask = ((1 << length) - 1) << (bitStart - length + 1); MPU6050_Read(slaveAddr, regAddr, 1); tmp = I2CSlaveBuffer[PORT_USED][0]; // uint8_t mask = ((1 << length) - 1) << (bitStart - length + 1); data <<= (bitStart - length + 1); // shift data into correct position data &= mask; // zero all non-important bits in data tmp &= ~(mask); // zero all important bits in existing byte tmp |= data; // combine data with existing byte MPU6050_Write(slaveAddr,regAddr,tmp); } void MPU6050_WriteBit(uint8_t slaveAddr, uint8_t regAddr, uint8_t bitNum, uint8_t data) { uint8_t tmp; MPU6050_Read(slaveAddr, regAddr, 1); tmp = I2CSlaveBuffer[PORT_USED][0]; tmp = (data != 0) ? (tmp | (1 << bitNum)) : (tmp & ~(1 << bitNum)); MPU6050_Write(slaveAddr,regAddr,tmp); } void MPU6050_ReadBits(uint8_t slaveAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t *data) { // 01101001 read byte // 76543210 bit numbers // xxx args: bitStart=4, length=3 // 010 masked // -> 010 shifted uint8_t tmp; uint8_t mask = ((1 << length) - 1) << (bitStart - length + 1); MPU6050_Read(slaveAddr, regAddr, 1); tmp = I2CSlaveBuffer[PORT_USED][0]; // uint8_t mask = ((1 << length) - 1) << (bitStart - length + 1); tmp &= mask; tmp >>= (bitStart - length + 1); *data = tmp; } void MPU6050_Initialize(void) { MPU6050_WriteBits(MPU6050_DEFAULT_ADDRESS, MPU6050_RA_PWR_MGMT_1, MPU6050_PWR1_CLKSEL_BIT, MPU6050_PWR1_CLKSEL_LENGTH, MPU6050_CLOCK_PLL_XGYRO); MPU6050_WriteBits(MPU6050_DEFAULT_ADDRESS, MPU6050_RA_GYRO_CONFIG, MPU6050_GCONFIG_FS_SEL_BIT, MPU6050_GCONFIG_FS_SEL_LENGTH, MPU6050_GYRO_FS_250); MPU6050_WriteBits(MPU6050_DEFAULT_ADDRESS, MPU6050_RA_ACCEL_CONFIG, MPU6050_ACONFIG_AFS_SEL_BIT, MPU6050_ACONFIG_AFS_SEL_LENGTH, MPU6050_ACCEL_FS_2); MPU6050_WriteBit(MPU6050_DEFAULT_ADDRESS, MPU6050_RA_PWR_MGMT_1, MPU6050_PWR1_SLEEP_BIT, 0);//(DISABLE); } uint8_t MPU6050_GetDeviceID() { uint8_t tmp; MPU6050_ReadBits(MPU6050_DEFAULT_ADDRESS, MPU6050_RA_WHO_AM_I, MPU6050_WHO_AM_I_BIT, MPU6050_WHO_AM_I_LENGTH, &tmp); return tmp; } uint8_t MPU6050_TestConnection() { // uint8_t tmp; if(MPU6050_GetDeviceID() == 0x34) //0b110100; 8-bit representation in hex = 0x34 return 1; else return 0; } void MPU6050_GetRawAccelGyro(int16_t* ax, int16_t* ay, int16_t* az, int16_t* gx, int16_t* gy, int16_t* gz) { // u8 tmpBuffer[14]; // int i; MPU6050_Read(MPU6050_DEFAULT_ADDRESS, MPU6050_RA_ACCEL_XOUT_H, 14); /* Get acceleration */ // for(i=0; i<3; i++) // AccelGyro[i]=((int16_t)((uint16_t)I2CSlaveBuffer[PORT_USED][2*i] << 8) + I2CSlaveBuffer[PORT_USED][2*i+1]); /* Get Angular rate */ // for(i=4; i<7; i++) // AccelGyro[i-1]=((int16_t)((uint16_t)I2CSlaveBuffer[PORT_USED][2*i] << 8) + I2CSlaveBuffer[PORT_USED][2*i+1]); *ax = (((int16_t)I2CSlaveBuffer[PORT_USED][0]) << 8) | ((int16_t)I2CSlaveBuffer[PORT_USED][1]); *ay = (((int16_t)I2CSlaveBuffer[PORT_USED][2]) << 8) | ((int16_t)I2CSlaveBuffer[PORT_USED][3]); *az = (((int16_t)I2CSlaveBuffer[PORT_USED][4]) << 8) | ((int16_t)I2CSlaveBuffer[PORT_USED][5]); *gx = (((int16_t)I2CSlaveBuffer[PORT_USED][8]) << 8) | ((int16_t)I2CSlaveBuffer[PORT_USED][9]); *gy = (((int16_t)I2CSlaveBuffer[PORT_USED][10]) << 8) | ((int16_t)I2CSlaveBuffer[PORT_USED][11]); *gz = (((int16_t)I2CSlaveBuffer[PORT_USED][12]) << 8) | ((int16_t)I2CSlaveBuffer[PORT_USED][13]); }
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原文地址：http://www.cnblogs.com/LittleTiger/p/4595828.html
