10 标准库的硬件I2C驱动mpu6050模块

阅读引言:本文只是给大家分享硬件I2C读取mpu6050加速度, 角速度, 温度的代码。

#ifndef __MPU6050_H
#define __MPU6050_H


void MPU6050_WriteReg(uint8_t RegAddress, uint8_t Data);
uint8_t MPU6050_ReadReg(uint8_t RegAddress);

void MPU6050_Init(void);
uint8_t MPU6050_GetID(void);
void MPU6050_GetData(int16_t *AccX, int16_t *AccY, int16_t *AccZ, int16_t *GyroX, int16_t *GyroY, int16_t *GyroZ);

#endif
#ifndef __MPU6050_REG_H
#define __MPU6050_REG_H

#define	MPU6050_SMPLRT_DIV		0x19
#define	MPU6050_CONFIG			0x1A
#define	MPU6050_GYRO_CONFIG		0x1B
#define	MPU6050_ACCEL_CONFIG	0x1C

#define	MPU6050_ACCEL_XOUT_H	0x3B
#define	MPU6050_ACCEL_XOUT_L	0x3C
#define	MPU6050_ACCEL_YOUT_H	0x3D
#define	MPU6050_ACCEL_YOUT_L	0x3E
#define	MPU6050_ACCEL_ZOUT_H	0x3F
#define	MPU6050_ACCEL_ZOUT_L	0x40
#define	MPU6050_TEMP_OUT_H		0x41
#define	MPU6050_TEMP_OUT_L		0x42
#define	MPU6050_GYRO_XOUT_H		0x43
#define	MPU6050_GYRO_XOUT_L		0x44
#define	MPU6050_GYRO_YOUT_H		0x45
#define	MPU6050_GYRO_YOUT_L		0x46
#define	MPU6050_GYRO_ZOUT_H		0x47
#define	MPU6050_GYRO_ZOUT_L		0x48

#define	MPU6050_PWR_MGMT_1		0x6B
#define	MPU6050_PWR_MGMT_2		0x6C
#define	MPU6050_WHO_AM_I		0x75

#endif
#include "stm32f10x.h"                  // Device header
#include "MPU6050_Reg.h"

#define MPU6050_ADDRESS		0xD0         //MPOU6050的出厂地址本质是对应的波形激活该芯片


/*CheckEnvent 对应的函数操作执行到位没有*/
void MPU6050_WaitEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT)
{
	uint32_t Timeout;
	Timeout = 10000;
	while (I2C_CheckEvent(I2Cx, I2C_EVENT) != SUCCESS)   //确认函数执行之后执行到位了, 判断一些, 为什么要有超时处理, 也不能一直让程序堵住把
		//标志位 
	{
		Timeout --;
		if (Timeout == 0)
		{
			//实际的开发中这里应该加上对应的超时处理
			break;
		}
	}
}

/*写寄存器*/
void MPU6050_WriteReg(uint8_t RegAddress, uint8_t Data)
{
	I2C_GenerateSTART(I2C2, ENABLE);        //函数执行完之后会产生对应的事件, 用I2C_CheckEvent
	//函数检查对应的事件
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT);
	
	I2C_Send7bitAddress(I2C2, MPU6050_ADDRESS, I2C_Direction_Transmitter);   //选择从机
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED);
	
	I2C_SendData(I2C2, RegAddress);     //发送到MPU6050的哪一个寄存器
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTING);
	
	I2C_SendData(I2C2, Data);    //发送数据
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED);           //接收从机的应答信号
	
	I2C_GenerateSTOP(I2C2, ENABLE);    //产生停止位的波形, 对应的硬件电路完成相关的操作
}


/*MPU6050读寄存器*/
uint8_t MPU6050_ReadReg(uint8_t RegAddress)
{
	uint8_t Data;
	
	I2C_GenerateSTART(I2C2, ENABLE);
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT);
	
	I2C_Send7bitAddress(I2C2, MPU6050_ADDRESS, I2C_Direction_Transmitter);
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED);
	
	I2C_SendData(I2C2, RegAddress);
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED);
	
	I2C_GenerateSTART(I2C2, ENABLE);
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT);
	
	I2C_Send7bitAddress(I2C2, MPU6050_ADDRESS, I2C_Direction_Receiver);
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED);
	
	I2C_AcknowledgeConfig(I2C2, DISABLE);
	I2C_GenerateSTOP(I2C2, ENABLE);
	
	MPU6050_WaitEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED);
	Data = I2C_ReceiveData(I2C2);
	
	I2C_AcknowledgeConfig(I2C2, ENABLE);
	
	return Data;
}

void MPU6050_Init(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
	
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;            //复用开漏输出, 将GPIO交给片上外设
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	
	I2C_InitTypeDef I2C_InitStructure;
	I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
	I2C_InitStructure.I2C_ClockSpeed = 50000;  //50KHz
	I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
	I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
	I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
	I2C_InitStructure.I2C_OwnAddress1 = 0x00;
	I2C_Init(I2C2, &I2C_InitStructure);
	
	I2C_Cmd(I2C2, ENABLE);
	
	/*向MPU6050相应的寄存器内部写入对应的参数*/
	MPU6050_WriteReg(MPU6050_PWR_MGMT_1, 0x01);
	MPU6050_WriteReg(MPU6050_PWR_MGMT_2, 0x00);
	MPU6050_WriteReg(MPU6050_SMPLRT_DIV, 0x09);
	MPU6050_WriteReg(MPU6050_CONFIG, 0x06);
	MPU6050_WriteReg(MPU6050_GYRO_CONFIG, 0x18);   //陀螺仪
	MPU6050_WriteReg(MPU6050_ACCEL_CONFIG, 0x18);  //加速度       这些寄存器会根据写入的值
	//有不同的状态和工作方式, 对应数据手册
}

/*获取mpu6050芯片的id号*/
uint8_t MPU6050_GetID(void)
{
	return MPU6050_ReadReg(MPU6050_WHO_AM_I);        //读出MPU6050_WHO_AM_I这个寄存器的值
}


/*得到MPU6050加速度,陀螺仪寄存器的值*/
void MPU6050_GetData(int16_t *AccX, int16_t *AccY, int16_t *AccZ, 
						int16_t *GyroX, int16_t *GyroY, int16_t *GyroZ)
{
	uint8_t DataH, DataL;
	
	DataH = MPU6050_ReadReg(MPU6050_ACCEL_XOUT_H);
	DataL = MPU6050_ReadReg(MPU6050_ACCEL_XOUT_L);
	*AccX = (DataH << 8) | DataL;                //将两个8位的数据拼接成一个16位的数据
	
	DataH = MPU6050_ReadReg(MPU6050_ACCEL_YOUT_H);
	DataL = MPU6050_ReadReg(MPU6050_ACCEL_YOUT_L);
	*AccY = (DataH << 8) | DataL;
	
	DataH = MPU6050_ReadReg(MPU6050_ACCEL_ZOUT_H);
	DataL = MPU6050_ReadReg(MPU6050_ACCEL_ZOUT_L);
	*AccZ = (DataH << 8) | DataL;
	
	DataH = MPU6050_ReadReg(MPU6050_GYRO_XOUT_H);
	DataL = MPU6050_ReadReg(MPU6050_GYRO_XOUT_L);
	*GyroX = (DataH << 8) | DataL;
	
	DataH = MPU6050_ReadReg(MPU6050_GYRO_YOUT_H);
	DataL = MPU6050_ReadReg(MPU6050_GYRO_YOUT_L);
	*GyroY = (DataH << 8) | DataL;
	
	DataH = MPU6050_ReadReg(MPU6050_GYRO_ZOUT_H);
	DataL = MPU6050_ReadReg(MPU6050_GYRO_ZOUT_L);
	*GyroZ = (DataH << 8) | DataL;
}

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