-
Notifications
You must be signed in to change notification settings - Fork 7
/
mpu6050.c
176 lines (163 loc) · 4.47 KB
/
mpu6050.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
#include "mpu6050.h"
//初始化MPU6050
//返回值:0,成功
// 其他,错误代码
uint8_t MPU_Init(void)
{
uint8_t res;
extern I2C_HandleTypeDef hi2c1;
HAL_I2C_Init(&hi2c1);
MPU_Write_Byte(MPU_PWR_MGMT1_REG,0X80); //复位MPU6050
MPU_Write_Byte(MPU_PWR_MGMT1_REG,0X00); //唤醒MPU6050
MPU_Set_Gyro_Fsr(3); //陀螺仪传感器,±2000dps
MPU_Set_Accel_Fsr(0); //加速度传感器,±2g
MPU_Set_Rate(50); //设置采样率50Hz
MPU_Write_Byte(MPU_INT_EN_REG,0X00); //关闭所有中断
MPU_Write_Byte(MPU_USER_CTRL_REG,0X00); //I2C主模式关闭
MPU_Write_Byte(MPU_FIFO_EN_REG,0X00); //关闭FIFO
MPU_Write_Byte(MPU_INTBP_CFG_REG,0X80); //INT引脚低电平有效
res=MPU_Read_Byte(MPU_DEVICE_ID_REG);
if(res==MPU_ADDR)//器件ID正确
{
MPU_Write_Byte(MPU_PWR_MGMT1_REG,0X01); //设置CLKSEL,PLL X轴为参考
MPU_Write_Byte(MPU_PWR_MGMT2_REG,0X00); //加速度与陀螺仪都工作
MPU_Set_Rate(50); //设置采样率为50Hz
}else return 1;
return 0;
}
//设置MPU6050陀螺仪传感器满量程范围
//fsr:0,±250dps;1,±500dps;2,±1000dps;3,±2000dps
//返回值:0,设置成功
// 其他,设置失败
uint8_t MPU_Set_Gyro_Fsr(uint8_t fsr)
{
return MPU_Write_Byte(MPU_GYRO_CFG_REG,fsr<<3);//设置陀螺仪满量程范围
}
//设置MPU6050加速度传感器满量程范围
//fsr:0,±2g;1,±4g;2,±8g;3,±16g
//返回值:0,设置成功
// 其他,设置失败
uint8_t MPU_Set_Accel_Fsr(uint8_t fsr)
{
return MPU_Write_Byte(MPU_ACCEL_CFG_REG,fsr<<3);//设置加速度传感器满量程范围
}
//设置MPU6050的数字低通滤波器
//lpf:数字低通滤波频率(Hz)
//返回值:0,设置成功
// 其他,设置失败
uint8_t MPU_Set_LPF(uint16_t lpf)
{
uint8_t data=0;
if(lpf>=188)data=1;
else if(lpf>=98)data=2;
else if(lpf>=42)data=3;
else if(lpf>=20)data=4;
else if(lpf>=10)data=5;
else data=6;
return MPU_Write_Byte(MPU_CFG_REG,data);//设置数字低通滤波器
}
//设置MPU6050的采样率(假定Fs=1KHz)
//rate:4~1000(Hz)
//返回值:0,设置成功
// 其他,设置失败
uint8_t MPU_Set_Rate(uint16_t rate)
{
uint8_t data;
if(rate>1000)rate=1000;
if(rate<4)rate=4;
data=1000/rate-1;
data=MPU_Write_Byte(MPU_SAMPLE_RATE_REG,data); //设置数字低通滤波器
return MPU_Set_LPF(rate/2); //自动设置LPF为采样率的一半
}
//得到温度值
//返回值:温度值(扩大了100倍)
float MPU_Get_Temperature(void)
{
unsigned char buf[2];
short raw;
float temp;
MPU_Read_Len(MPU_TEMP_OUTH_REG,2,buf);
raw=(buf[0]<<8)| buf[1];
temp=(36.53+((double)raw)/340)*100;
// temp = (long)((35 + (raw / 340)) * 65536L);
return temp/100.0f;
}
//得到陀螺仪值(原始值)
//gx,gy,gz:陀螺仪x,y,z轴的原始读数(带符号)
//返回值:0,成功
// 其他,错误代码
uint8_t MPU_Get_Gyroscope(short *gx,short *gy,short *gz)
{
uint8_t buf[6],res;
res=MPU_Read_Len(MPU_GYRO_XOUTH_REG,6,buf);
if(res==0)
{
*gx=((uint16_t)buf[0]<<8)|buf[1];
*gy=((uint16_t)buf[2]<<8)|buf[3];
*gz=((uint16_t)buf[4]<<8)|buf[5];
}
return res;
}
//得到加速度值(原始值)
//gx,gy,gz:陀螺仪x,y,z轴的原始读数(带符号)
//返回值:0,成功
// 其他,错误代码
uint8_t MPU_Get_Accelerometer(short *ax,short *ay,short *az)
{
uint8_t buf[6],res;
res=MPU_Read_Len(MPU_ACCEL_XOUTH_REG,6,buf);
if(res==0)
{
*ax=((uint16_t)buf[0]<<8)|buf[1];
*ay=((uint16_t)buf[2]<<8)|buf[3];
*az=((uint16_t)buf[4]<<8)|buf[5];
}
return res;;
}
//IIC连续写
uint8_t MPU_Write_Len(uint8_t reg,uint8_t len,uint8_t *buf)
{
extern I2C_HandleTypeDef hi2c1;
HAL_I2C_Mem_Write(&hi2c1, MPU_WRITE, reg, I2C_MEMADD_SIZE_8BIT, buf, len, 0xfff);
HAL_Delay(100);
return 0;
}
//IIC连续读
//addr:器件地址
//reg:要读取的寄存器地址
//len:要读取的长度
//buf:读取到的数据存储区
//返回值:0,正常
// 其他,错误代码
uint8_t MPU_Read_Len(uint8_t reg,uint8_t len,uint8_t *buf)
{
extern I2C_HandleTypeDef hi2c1;
HAL_I2C_Mem_Read(&hi2c1, MPU_READ, reg, I2C_MEMADD_SIZE_8BIT, buf, len, 0xfff);
HAL_Delay(100);
return 0;
}
//IIC写一个字节
//reg:寄存器地址
//data:数据
//返回值:0,正常
// 其他,错误代码
uint8_t MPU_Write_Byte(uint8_t reg,uint8_t data)
{
extern I2C_HandleTypeDef hi2c1;
unsigned char W_Data=0;
W_Data = data;
HAL_I2C_Mem_Write(&hi2c1, MPU_WRITE, reg, I2C_MEMADD_SIZE_8BIT, &W_Data, 1, 0xfff);
HAL_Delay(100);
return 0;
}
//IIC读一个字节
//reg:寄存器地址
//返回值:读到的数据
uint8_t MPU_Read_Byte(uint8_t reg)
{
extern I2C_HandleTypeDef hi2c1;
unsigned char R_Data=0;
HAL_I2C_Mem_Read(&hi2c1, MPU_READ, reg, I2C_MEMADD_SIZE_8BIT, &R_Data, 1, 0xfff);
HAL_Delay(100);
return R_Data;
}