基于MPU9250的IMU库,可以测量pitch,roll,yaw,compass
imu.cpp@1:7cf70724bdb0, 2018-06-21 (annotated)
- Committer:
- adaphoto
- Date:
- Thu Jun 21 08:46:30 2018 +0000
- Revision:
- 1:7cf70724bdb0
- Parent:
- 0:35bba382318b
???BMP180????????????????
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
adaphoto | 0:35bba382318b | 1 | #include "imu.h" |
adaphoto | 0:35bba382318b | 2 | |
adaphoto | 0:35bba382318b | 3 | I2C i2c(I2C_SDA,I2C_SCL); |
adaphoto | 0:35bba382318b | 4 | |
adaphoto | 0:35bba382318b | 5 | /** |
adaphoto | 0:35bba382318b | 6 | * @brief invSqrt |
adaphoto | 0:35bba382318b | 7 | * @param |
adaphoto | 0:35bba382318b | 8 | * @retval |
adaphoto | 0:35bba382318b | 9 | */ |
adaphoto | 0:35bba382318b | 10 | float IMU::invSqrt(float x) |
adaphoto | 0:35bba382318b | 11 | { |
adaphoto | 0:35bba382318b | 12 | float halfx = 0.5f * x; |
adaphoto | 0:35bba382318b | 13 | float y = x; |
adaphoto | 0:35bba382318b | 14 | |
adaphoto | 0:35bba382318b | 15 | long i = *(long*)&y; //get bits for floating value |
adaphoto | 0:35bba382318b | 16 | i = 0x5f3759df - (i >> 1); //gives initial guss you |
adaphoto | 0:35bba382318b | 17 | y = *(float*)&i; //convert bits back to float |
adaphoto | 0:35bba382318b | 18 | y = y * (1.5f - (halfx * y * y)); //newtop step, repeating increases accuracy |
adaphoto | 0:35bba382318b | 19 | |
adaphoto | 0:35bba382318b | 20 | return y; |
adaphoto | 0:35bba382318b | 21 | } |
adaphoto | 0:35bba382318b | 22 | |
adaphoto | 0:35bba382318b | 23 | /** |
adaphoto | 0:35bba382318b | 24 | * @brief initializes IMU |
adaphoto | 0:35bba382318b | 25 | * @param None |
adaphoto | 0:35bba382318b | 26 | * @retval None |
adaphoto | 0:35bba382318b | 27 | */ |
adaphoto | 0:35bba382318b | 28 | void IMU::IMU_Init() |
adaphoto | 0:35bba382318b | 29 | { |
adaphoto | 0:35bba382318b | 30 | MPU9250_Init(); |
adaphoto | 1:7cf70724bdb0 | 31 | BMP180_Init(); |
adaphoto | 0:35bba382318b | 32 | |
adaphoto | 0:35bba382318b | 33 | q0 = 1.0f; |
adaphoto | 0:35bba382318b | 34 | q1 = 0.0f; |
adaphoto | 0:35bba382318b | 35 | q2 = 0.0f; |
adaphoto | 0:35bba382318b | 36 | q3 = 0.0f; |
adaphoto | 0:35bba382318b | 37 | } |
adaphoto | 0:35bba382318b | 38 | |
adaphoto | 0:35bba382318b | 39 | /** |
adaphoto | 0:35bba382318b | 40 | * @brief Updata attitude and heading |
adaphoto | 0:35bba382318b | 41 | * @param ax: accelerometer X |
adaphoto | 0:35bba382318b | 42 | * @param ay: accelerometer Y |
adaphoto | 0:35bba382318b | 43 | * @param az: accelerometer Z |
adaphoto | 0:35bba382318b | 44 | * @param gx: gyroscopes X |
adaphoto | 0:35bba382318b | 45 | * @param gy: gyroscopes Y |
adaphoto | 0:35bba382318b | 46 | * @param gz: gyroscopes Z |
adaphoto | 0:35bba382318b | 47 | * @param mx: magnetometer X |
adaphoto | 0:35bba382318b | 48 | * @param my: magnetometer Y |
adaphoto | 0:35bba382318b | 49 | * @param mz: magnetometer Z |
adaphoto | 0:35bba382318b | 50 | * @retval None |
adaphoto | 0:35bba382318b | 51 | */ |
adaphoto | 0:35bba382318b | 52 | void IMU::IMU_AHRSupdate(float gx, float gy, float gz, float ax, float ay, float az, float mx, float my, float mz) |
adaphoto | 0:35bba382318b | 53 | { |
adaphoto | 0:35bba382318b | 54 | float norm; |
adaphoto | 0:35bba382318b | 55 | float hx, hy, hz, bx, bz; |
adaphoto | 0:35bba382318b | 56 | float vx, vy, vz, wx, wy, wz; |
adaphoto | 0:35bba382318b | 57 | float exInt = 0.0, eyInt = 0.0, ezInt = 0.0; |
adaphoto | 0:35bba382318b | 58 | float ex, ey, ez, halfT = 0.024f; |
adaphoto | 0:35bba382318b | 59 | |
adaphoto | 0:35bba382318b | 60 | float q0q0 = q0 * q0; |
adaphoto | 0:35bba382318b | 61 | float q0q1 = q0 * q1; |
adaphoto | 0:35bba382318b | 62 | float q0q2 = q0 * q2; |
adaphoto | 0:35bba382318b | 63 | float q0q3 = q0 * q3; |
adaphoto | 0:35bba382318b | 64 | float q1q1 = q1 * q1; |
adaphoto | 0:35bba382318b | 65 | float q1q2 = q1 * q2; |
adaphoto | 0:35bba382318b | 66 | float q1q3 = q1 * q3; |
adaphoto | 0:35bba382318b | 67 | float q2q2 = q2 * q2; |
adaphoto | 0:35bba382318b | 68 | float q2q3 = q2 * q3; |
adaphoto | 0:35bba382318b | 69 | float q3q3 = q3 * q3; |
adaphoto | 0:35bba382318b | 70 | |
adaphoto | 0:35bba382318b | 71 | norm = invSqrt(ax * ax + ay * ay + az * az); |
adaphoto | 0:35bba382318b | 72 | ax = ax * norm; |
adaphoto | 0:35bba382318b | 73 | ay = ay * norm; |
adaphoto | 0:35bba382318b | 74 | az = az * norm; |
adaphoto | 0:35bba382318b | 75 | |
adaphoto | 0:35bba382318b | 76 | norm = invSqrt(mx * mx + my * my + mz * mz); |
adaphoto | 0:35bba382318b | 77 | mx = mx * norm; |
adaphoto | 0:35bba382318b | 78 | my = my * norm; |
adaphoto | 0:35bba382318b | 79 | mz = mz * norm; |
adaphoto | 0:35bba382318b | 80 | |
adaphoto | 0:35bba382318b | 81 | // compute reference direction of flux |
adaphoto | 0:35bba382318b | 82 | hx = 2 * mx * (0.5f - q2q2 - q3q3) + 2 * my * (q1q2 - q0q3) + 2 * mz * (q1q3 + q0q2); |
adaphoto | 0:35bba382318b | 83 | hy = 2 * mx * (q1q2 + q0q3) + 2 * my * (0.5f - q1q1 - q3q3) + 2 * mz * (q2q3 - q0q1); |
adaphoto | 0:35bba382318b | 84 | hz = 2 * mx * (q1q3 - q0q2) + 2 * my * (q2q3 + q0q1) + 2 * mz * (0.5f - q1q1 - q2q2); |
adaphoto | 0:35bba382318b | 85 | bx = sqrt((hx * hx) + (hy * hy)); |
adaphoto | 0:35bba382318b | 86 | bz = hz; |
adaphoto | 0:35bba382318b | 87 | |
adaphoto | 0:35bba382318b | 88 | // estimated direction of gravity and flux (v and w) |
adaphoto | 0:35bba382318b | 89 | vx = 2 * (q1q3 - q0q2); |
adaphoto | 0:35bba382318b | 90 | vy = 2 * (q0q1 + q2q3); |
adaphoto | 0:35bba382318b | 91 | vz = q0q0 - q1q1 - q2q2 + q3q3; |
adaphoto | 0:35bba382318b | 92 | wx = 2 * bx * (0.5 - q2q2 - q3q3) + 2 * bz * (q1q3 - q0q2); |
adaphoto | 0:35bba382318b | 93 | wy = 2 * bx * (q1q2 - q0q3) + 2 * bz * (q0q1 + q2q3); |
adaphoto | 0:35bba382318b | 94 | wz = 2 * bx * (q0q2 + q1q3) + 2 * bz * (0.5 - q1q1 - q2q2); |
adaphoto | 0:35bba382318b | 95 | |
adaphoto | 0:35bba382318b | 96 | // error is sum of cross product between reference direction of fields and direction measured by sensors |
adaphoto | 0:35bba382318b | 97 | ex = (ay * vz - az * vy) + (my * wz - mz * wy); |
adaphoto | 0:35bba382318b | 98 | ey = (az * vx - ax * vz) + (mz * wx - mx * wz); |
adaphoto | 0:35bba382318b | 99 | ez = (ax * vy - ay * vx) + (mx * wy - my * wx); |
adaphoto | 0:35bba382318b | 100 | |
adaphoto | 0:35bba382318b | 101 | if(ex != 0.0f && ey != 0.0f && ez != 0.0f) |
adaphoto | 0:35bba382318b | 102 | { |
adaphoto | 0:35bba382318b | 103 | exInt = exInt + ex * Ki * halfT; |
adaphoto | 0:35bba382318b | 104 | eyInt = eyInt + ey * Ki * halfT; |
adaphoto | 0:35bba382318b | 105 | ezInt = ezInt + ez * Ki * halfT; |
adaphoto | 0:35bba382318b | 106 | |
adaphoto | 0:35bba382318b | 107 | gx = gx + Kp * ex + exInt; |
adaphoto | 0:35bba382318b | 108 | gy = gy + Kp * ey + eyInt; |
adaphoto | 0:35bba382318b | 109 | gz = gz + Kp * ez + ezInt; |
adaphoto | 0:35bba382318b | 110 | } |
adaphoto | 0:35bba382318b | 111 | |
adaphoto | 0:35bba382318b | 112 | q0 = q0 + (-q1 * gx - q2 * gy - q3 * gz) * halfT; |
adaphoto | 0:35bba382318b | 113 | q1 = q1 + (q0 * gx + q2 * gz - q3 * gy) * halfT; |
adaphoto | 0:35bba382318b | 114 | q2 = q2 + (q0 * gy - q1 * gz + q3 * gx) * halfT; |
adaphoto | 0:35bba382318b | 115 | q3 = q3 + (q0 * gz + q1 * gy - q2 * gx) * halfT; |
adaphoto | 0:35bba382318b | 116 | |
adaphoto | 0:35bba382318b | 117 | norm = invSqrt(q0 * q0 + q1 * q1 + q2 * q2 + q3 * q3); |
adaphoto | 0:35bba382318b | 118 | q0 = q0 * norm; |
adaphoto | 0:35bba382318b | 119 | q1 = q1 * norm; |
adaphoto | 0:35bba382318b | 120 | q2 = q2 * norm; |
adaphoto | 0:35bba382318b | 121 | q3 = q3 * norm; |
adaphoto | 0:35bba382318b | 122 | } |
adaphoto | 0:35bba382318b | 123 | |
adaphoto | 0:35bba382318b | 124 | /** |
adaphoto | 0:35bba382318b | 125 | * @brief Get quaters |
adaphoto | 0:35bba382318b | 126 | * @param None |
adaphoto | 0:35bba382318b | 127 | * @retval None |
adaphoto | 0:35bba382318b | 128 | */ |
adaphoto | 0:35bba382318b | 129 | void IMU::IMU_GetQuater(void) |
adaphoto | 0:35bba382318b | 130 | { |
adaphoto | 0:35bba382318b | 131 | float MotionVal[9]; |
adaphoto | 0:35bba382318b | 132 | |
adaphoto | 0:35bba382318b | 133 | MPU9250_READ_ACCEL(); |
adaphoto | 0:35bba382318b | 134 | MPU9250_READ_GYRO(); |
adaphoto | 0:35bba382318b | 135 | MPU9250_READ_MAG(); |
adaphoto | 0:35bba382318b | 136 | |
adaphoto | 0:35bba382318b | 137 | MotionVal[0]=gyro[0]/32.8; |
adaphoto | 0:35bba382318b | 138 | MotionVal[1]=gyro[1]/32.8; |
adaphoto | 0:35bba382318b | 139 | MotionVal[2]=gyro[2]/32.8; |
adaphoto | 0:35bba382318b | 140 | MotionVal[3]=accel[0]; |
adaphoto | 0:35bba382318b | 141 | MotionVal[4]=accel[1]; |
adaphoto | 0:35bba382318b | 142 | MotionVal[5]=accel[2]; |
adaphoto | 0:35bba382318b | 143 | MotionVal[6]=magn[0]; |
adaphoto | 0:35bba382318b | 144 | MotionVal[7]=magn[1]; |
adaphoto | 0:35bba382318b | 145 | MotionVal[8]=magn[2]; |
adaphoto | 0:35bba382318b | 146 | |
adaphoto | 0:35bba382318b | 147 | IMU_AHRSupdate((float)MotionVal[0] * 0.0175, (float)MotionVal[1] * 0.0175, (float)MotionVal[2] * 0.0175, |
adaphoto | 0:35bba382318b | 148 | (float)MotionVal[3], (float)MotionVal[4], (float)MotionVal[5], (float)MotionVal[6], (float)MotionVal[7], MotionVal[8]); |
adaphoto | 0:35bba382318b | 149 | } |
adaphoto | 0:35bba382318b | 150 | |
adaphoto | 0:35bba382318b | 151 | /** |
adaphoto | 0:35bba382318b | 152 | * @brief Get Yaw Pitch Roll |
adaphoto | 0:35bba382318b | 153 | * @param None |
adaphoto | 0:35bba382318b | 154 | * @retval None |
adaphoto | 0:35bba382318b | 155 | */ |
adaphoto | 0:35bba382318b | 156 | void IMU::IMU_GetYawPitchRoll(float *Angles) |
adaphoto | 0:35bba382318b | 157 | { |
adaphoto | 0:35bba382318b | 158 | |
adaphoto | 0:35bba382318b | 159 | int x_tmp,y_tmp; |
adaphoto | 0:35bba382318b | 160 | |
adaphoto | 0:35bba382318b | 161 | IMU_GetQuater(); |
adaphoto | 0:35bba382318b | 162 | |
adaphoto | 0:35bba382318b | 163 | x_tmp = magn[0]; |
adaphoto | 0:35bba382318b | 164 | y_tmp = magn[1]; |
adaphoto | 0:35bba382318b | 165 | if(x_tmp>0x7fff)x_tmp-=0xffff; |
adaphoto | 0:35bba382318b | 166 | if(y_tmp>0x7fff)y_tmp-=0xffff; |
adaphoto | 0:35bba382318b | 167 | |
adaphoto | 0:35bba382318b | 168 | Angles[1] = asin(-2 * q1 * q3 + 2 * q0* q2)* 57.3; // pitch |
adaphoto | 0:35bba382318b | 169 | Angles[2] = atan2(2 * q2 * q3 + 2 * q0 * q1, -2 * q1 * q1 - 2 * q2* q2 + 1)* 57.3; // roll |
adaphoto | 0:35bba382318b | 170 | Angles[0] = atan2(-2 * q1 * q2 - 2 * q0 * q3, 2 * q2 * q2 + 2 * q3 * q3 - 1) * 57.3; //Yaw |
adaphoto | 0:35bba382318b | 171 | Angles[3] = atan2((double)(y_tmp) , (double)(x_tmp)) * (180 / 3.14159265) + 180; // Compass angle in degrees |
adaphoto | 0:35bba382318b | 172 | |
adaphoto | 0:35bba382318b | 173 | |
adaphoto | 0:35bba382318b | 174 | } |
adaphoto | 0:35bba382318b | 175 | |
adaphoto | 0:35bba382318b | 176 | /************************************************************/ |
adaphoto | 0:35bba382318b | 177 | //下面的代码是MPU9250的各种操作 |
adaphoto | 0:35bba382318b | 178 | /************************************************************/ |
adaphoto | 0:35bba382318b | 179 | void IMU::I2C_WriteOneByte(uint8_t DevAddr, uint8_t RegAddr, uint8_t Data) |
adaphoto | 0:35bba382318b | 180 | { |
adaphoto | 0:35bba382318b | 181 | char data_write[2]; |
adaphoto | 0:35bba382318b | 182 | |
adaphoto | 0:35bba382318b | 183 | data_write[0] = RegAddr; |
adaphoto | 0:35bba382318b | 184 | data_write[1] = Data; |
adaphoto | 0:35bba382318b | 185 | |
adaphoto | 0:35bba382318b | 186 | i2c.write(DevAddr,data_write,2,0); |
adaphoto | 0:35bba382318b | 187 | } |
adaphoto | 0:35bba382318b | 188 | |
adaphoto | 0:35bba382318b | 189 | uint8_t IMU::I2C_ReadOneByte(uint8_t DevAddr, uint8_t RegAddr) |
adaphoto | 0:35bba382318b | 190 | { |
adaphoto | 0:35bba382318b | 191 | char data_write[2]; |
adaphoto | 0:35bba382318b | 192 | char data_read[2]; |
adaphoto | 0:35bba382318b | 193 | char data; |
adaphoto | 0:35bba382318b | 194 | |
adaphoto | 0:35bba382318b | 195 | data_write[0] = RegAddr; |
adaphoto | 0:35bba382318b | 196 | |
adaphoto | 0:35bba382318b | 197 | i2c.write(DevAddr,data_write,1,1); |
adaphoto | 0:35bba382318b | 198 | i2c.read(DevAddr,data_read,1,0); |
adaphoto | 0:35bba382318b | 199 | |
adaphoto | 0:35bba382318b | 200 | data = data_read[0]; |
adaphoto | 0:35bba382318b | 201 | |
adaphoto | 0:35bba382318b | 202 | return data; |
adaphoto | 0:35bba382318b | 203 | } |
adaphoto | 1:7cf70724bdb0 | 204 | |
adaphoto | 1:7cf70724bdb0 | 205 | void IMU::BMP180_ReadReg(uint8_t RegAddr, uint8_t Num, char *pBuffer) |
adaphoto | 1:7cf70724bdb0 | 206 | { |
adaphoto | 1:7cf70724bdb0 | 207 | char data_write[2]; |
adaphoto | 1:7cf70724bdb0 | 208 | char DevAddr = BMP180_ADDR; |
adaphoto | 1:7cf70724bdb0 | 209 | |
adaphoto | 1:7cf70724bdb0 | 210 | data_write[0] = RegAddr; |
adaphoto | 1:7cf70724bdb0 | 211 | i2c.write(DevAddr, data_write, 1, 1); |
adaphoto | 1:7cf70724bdb0 | 212 | i2c.read(DevAddr, pBuffer, Num, 0); |
adaphoto | 1:7cf70724bdb0 | 213 | } |
adaphoto | 0:35bba382318b | 214 | /** |
adaphoto | 0:35bba382318b | 215 | * @brief Initializes MPU9250 |
adaphoto | 0:35bba382318b | 216 | * @param None |
adaphoto | 0:35bba382318b | 217 | * @retval None |
adaphoto | 0:35bba382318b | 218 | */ |
adaphoto | 0:35bba382318b | 219 | void IMU::MPU9250_Init() |
adaphoto | 0:35bba382318b | 220 | { |
adaphoto | 0:35bba382318b | 221 | I2C_WriteOneByte(GYRO_ADDRESS,PWR_MGMT_1, 0x00); |
adaphoto | 0:35bba382318b | 222 | I2C_WriteOneByte(GYRO_ADDRESS,SMPLRT_DIV, 0x07); |
adaphoto | 0:35bba382318b | 223 | I2C_WriteOneByte(GYRO_ADDRESS,CONFIG, 0x06); |
adaphoto | 0:35bba382318b | 224 | I2C_WriteOneByte(GYRO_ADDRESS,GYRO_CONFIG, 0x10); |
adaphoto | 0:35bba382318b | 225 | I2C_WriteOneByte(GYRO_ADDRESS,ACCEL_CONFIG, 0x01); |
adaphoto | 0:35bba382318b | 226 | |
adaphoto | 0:35bba382318b | 227 | Thread::wait(10); |
adaphoto | 0:35bba382318b | 228 | |
adaphoto | 0:35bba382318b | 229 | if(MPU9250_Check()) |
adaphoto | 0:35bba382318b | 230 | { |
adaphoto | 0:35bba382318b | 231 | printf("\r\n MPU9255 Ready!\n"); |
adaphoto | 0:35bba382318b | 232 | } |
adaphoto | 0:35bba382318b | 233 | else |
adaphoto | 0:35bba382318b | 234 | { |
adaphoto | 0:35bba382318b | 235 | printf("\r\n MPU9255 Erro!\n"); |
adaphoto | 0:35bba382318b | 236 | } |
adaphoto | 0:35bba382318b | 237 | |
adaphoto | 0:35bba382318b | 238 | MPU9250_InitGyrOffset(); |
adaphoto | 0:35bba382318b | 239 | } |
adaphoto | 0:35bba382318b | 240 | |
adaphoto | 0:35bba382318b | 241 | /** |
adaphoto | 0:35bba382318b | 242 | * @brief Digital filter |
adaphoto | 0:35bba382318b | 243 | * @param *pIndex: |
adaphoto | 0:35bba382318b | 244 | * @param *pAvgBuffer: |
adaphoto | 0:35bba382318b | 245 | * @param InVal: |
adaphoto | 0:35bba382318b | 246 | * @param pOutVal: |
adaphoto | 0:35bba382318b | 247 | * |
adaphoto | 0:35bba382318b | 248 | * @retval None |
adaphoto | 0:35bba382318b | 249 | * |
adaphoto | 0:35bba382318b | 250 | */ |
adaphoto | 0:35bba382318b | 251 | void IMU::MPU9250_CalAvgValue(uint8_t *pIndex, int16_t *pAvgBuffer, int16_t InVal, int32_t *pOutVal) |
adaphoto | 0:35bba382318b | 252 | { |
adaphoto | 0:35bba382318b | 253 | uint8_t i; |
adaphoto | 0:35bba382318b | 254 | |
adaphoto | 0:35bba382318b | 255 | *(pAvgBuffer + ((*pIndex) ++)) = InVal; |
adaphoto | 0:35bba382318b | 256 | *pIndex &= 0x07; |
adaphoto | 0:35bba382318b | 257 | |
adaphoto | 0:35bba382318b | 258 | *pOutVal = 0; |
adaphoto | 0:35bba382318b | 259 | for(i = 0; i < 8; i ++) |
adaphoto | 0:35bba382318b | 260 | { |
adaphoto | 0:35bba382318b | 261 | *pOutVal += *(pAvgBuffer + i); |
adaphoto | 0:35bba382318b | 262 | } |
adaphoto | 0:35bba382318b | 263 | *pOutVal >>= 3; |
adaphoto | 0:35bba382318b | 264 | } |
adaphoto | 0:35bba382318b | 265 | |
adaphoto | 0:35bba382318b | 266 | /** |
adaphoto | 0:35bba382318b | 267 | * @brief Get accelerometer datas |
adaphoto | 0:35bba382318b | 268 | * @param None |
adaphoto | 0:35bba382318b | 269 | * @retval None |
adaphoto | 0:35bba382318b | 270 | */ |
adaphoto | 0:35bba382318b | 271 | void IMU::MPU9250_READ_ACCEL(void) |
adaphoto | 0:35bba382318b | 272 | { |
adaphoto | 0:35bba382318b | 273 | uint8_t i; |
adaphoto | 0:35bba382318b | 274 | int16_t InBuffer[3] = {0}; |
adaphoto | 0:35bba382318b | 275 | static int32_t OutBuffer[3] = {0}; |
adaphoto | 0:35bba382318b | 276 | static MPU9250_AvgTypeDef MPU9250_Filter[3]; |
adaphoto | 0:35bba382318b | 277 | |
adaphoto | 0:35bba382318b | 278 | BUF[0]=I2C_ReadOneByte(ACCEL_ADDRESS,ACCEL_XOUT_L); |
adaphoto | 0:35bba382318b | 279 | BUF[1]=I2C_ReadOneByte(ACCEL_ADDRESS,ACCEL_XOUT_H); |
adaphoto | 0:35bba382318b | 280 | InBuffer[0]= (BUF[1]<<8)|BUF[0]; |
adaphoto | 0:35bba382318b | 281 | |
adaphoto | 0:35bba382318b | 282 | BUF[2]=I2C_ReadOneByte(ACCEL_ADDRESS,ACCEL_YOUT_L); |
adaphoto | 0:35bba382318b | 283 | BUF[3]=I2C_ReadOneByte(ACCEL_ADDRESS,ACCEL_YOUT_H); |
adaphoto | 0:35bba382318b | 284 | InBuffer[1]= (BUF[3]<<8)|BUF[2]; |
adaphoto | 0:35bba382318b | 285 | |
adaphoto | 0:35bba382318b | 286 | BUF[4]=I2C_ReadOneByte(ACCEL_ADDRESS,ACCEL_ZOUT_L); |
adaphoto | 0:35bba382318b | 287 | BUF[5]=I2C_ReadOneByte(ACCEL_ADDRESS,ACCEL_ZOUT_H); |
adaphoto | 0:35bba382318b | 288 | InBuffer[2]= (BUF[5]<<8)|BUF[4]; |
adaphoto | 0:35bba382318b | 289 | |
adaphoto | 0:35bba382318b | 290 | for(i = 0; i < 3; i ++) |
adaphoto | 0:35bba382318b | 291 | { |
adaphoto | 0:35bba382318b | 292 | MPU9250_CalAvgValue(&MPU9250_Filter[i].Index, MPU9250_Filter[i].AvgBuffer, InBuffer[i], OutBuffer + i); |
adaphoto | 0:35bba382318b | 293 | } |
adaphoto | 0:35bba382318b | 294 | accel[0] = *(OutBuffer + 0); |
adaphoto | 0:35bba382318b | 295 | accel[1] = *(OutBuffer + 1); |
adaphoto | 0:35bba382318b | 296 | accel[2] = *(OutBuffer + 2); |
adaphoto | 0:35bba382318b | 297 | } |
adaphoto | 0:35bba382318b | 298 | |
adaphoto | 0:35bba382318b | 299 | /** |
adaphoto | 0:35bba382318b | 300 | * @brief Get gyroscopes datas |
adaphoto | 0:35bba382318b | 301 | * @param None |
adaphoto | 0:35bba382318b | 302 | * @retval None |
adaphoto | 0:35bba382318b | 303 | */ |
adaphoto | 0:35bba382318b | 304 | void IMU::MPU9250_READ_GYRO(void) |
adaphoto | 0:35bba382318b | 305 | { |
adaphoto | 0:35bba382318b | 306 | uint8_t i; |
adaphoto | 0:35bba382318b | 307 | int16_t InBuffer[3] = {0}; |
adaphoto | 0:35bba382318b | 308 | static int32_t OutBuffer[3] = {0}; |
adaphoto | 0:35bba382318b | 309 | static MPU9250_AvgTypeDef MPU9250_Filter[3]; |
adaphoto | 0:35bba382318b | 310 | |
adaphoto | 0:35bba382318b | 311 | BUF[0]=I2C_ReadOneByte(GYRO_ADDRESS,GYRO_XOUT_L); |
adaphoto | 0:35bba382318b | 312 | BUF[1]=I2C_ReadOneByte(GYRO_ADDRESS,GYRO_XOUT_H); |
adaphoto | 0:35bba382318b | 313 | InBuffer[0]= (BUF[1]<<8)|BUF[0]; |
adaphoto | 0:35bba382318b | 314 | |
adaphoto | 0:35bba382318b | 315 | BUF[2]=I2C_ReadOneByte(GYRO_ADDRESS,GYRO_YOUT_L); |
adaphoto | 0:35bba382318b | 316 | BUF[3]=I2C_ReadOneByte(GYRO_ADDRESS,GYRO_YOUT_H); |
adaphoto | 0:35bba382318b | 317 | InBuffer[1] = (BUF[3]<<8)|BUF[2]; |
adaphoto | 0:35bba382318b | 318 | |
adaphoto | 0:35bba382318b | 319 | BUF[4]=I2C_ReadOneByte(GYRO_ADDRESS,GYRO_ZOUT_L); |
adaphoto | 0:35bba382318b | 320 | BUF[5]=I2C_ReadOneByte(GYRO_ADDRESS,GYRO_ZOUT_H); |
adaphoto | 0:35bba382318b | 321 | InBuffer[2] = (BUF[5]<<8)|BUF[4]; |
adaphoto | 0:35bba382318b | 322 | |
adaphoto | 0:35bba382318b | 323 | for(i = 0; i < 3; i ++) |
adaphoto | 0:35bba382318b | 324 | { |
adaphoto | 0:35bba382318b | 325 | MPU9250_CalAvgValue(&MPU9250_Filter[i].Index, MPU9250_Filter[i].AvgBuffer, InBuffer[i], OutBuffer + i); |
adaphoto | 0:35bba382318b | 326 | } |
adaphoto | 0:35bba382318b | 327 | gyro[0] = *(OutBuffer + 0) - MPU9250_Offset.X; |
adaphoto | 0:35bba382318b | 328 | gyro[1] = *(OutBuffer + 1) - MPU9250_Offset.Y; |
adaphoto | 0:35bba382318b | 329 | gyro[2] = *(OutBuffer + 2) - MPU9250_Offset.Z; |
adaphoto | 0:35bba382318b | 330 | } |
adaphoto | 0:35bba382318b | 331 | |
adaphoto | 0:35bba382318b | 332 | /** |
adaphoto | 0:35bba382318b | 333 | * @brief Get compass datas |
adaphoto | 0:35bba382318b | 334 | * @param None |
adaphoto | 0:35bba382318b | 335 | * @retval None |
adaphoto | 0:35bba382318b | 336 | */ |
adaphoto | 0:35bba382318b | 337 | void IMU::MPU9250_READ_MAG(void) |
adaphoto | 0:35bba382318b | 338 | { |
adaphoto | 0:35bba382318b | 339 | uint8_t i; |
adaphoto | 0:35bba382318b | 340 | int16_t InBuffer[3] = {0}; |
adaphoto | 0:35bba382318b | 341 | static int32_t OutBuffer[3] = {0}; |
adaphoto | 0:35bba382318b | 342 | static MPU9250_AvgTypeDef MPU9250_Filter[3]; |
adaphoto | 0:35bba382318b | 343 | |
adaphoto | 0:35bba382318b | 344 | I2C_WriteOneByte(GYRO_ADDRESS,0x37,0x02);//turn on Bypass Mode |
adaphoto | 0:35bba382318b | 345 | Thread::wait(10); |
adaphoto | 0:35bba382318b | 346 | I2C_WriteOneByte(MAG_ADDRESS,0x0A,0x01); |
adaphoto | 0:35bba382318b | 347 | Thread::wait(10); |
adaphoto | 0:35bba382318b | 348 | BUF[0]=I2C_ReadOneByte (MAG_ADDRESS,MAG_XOUT_L); |
adaphoto | 0:35bba382318b | 349 | BUF[1]=I2C_ReadOneByte (MAG_ADDRESS,MAG_XOUT_H); |
adaphoto | 0:35bba382318b | 350 | InBuffer[1] =(BUF[1]<<8)|BUF[0]; |
adaphoto | 0:35bba382318b | 351 | |
adaphoto | 0:35bba382318b | 352 | BUF[2]=I2C_ReadOneByte(MAG_ADDRESS,MAG_YOUT_L); |
adaphoto | 0:35bba382318b | 353 | BUF[3]=I2C_ReadOneByte(MAG_ADDRESS,MAG_YOUT_H); |
adaphoto | 0:35bba382318b | 354 | InBuffer[0] = (BUF[3]<<8)|BUF[2]; |
adaphoto | 0:35bba382318b | 355 | |
adaphoto | 0:35bba382318b | 356 | BUF[4]=I2C_ReadOneByte(MAG_ADDRESS,MAG_ZOUT_L); |
adaphoto | 0:35bba382318b | 357 | BUF[5]=I2C_ReadOneByte(MAG_ADDRESS,MAG_ZOUT_H); |
adaphoto | 0:35bba382318b | 358 | InBuffer[2] = (BUF[5]<<8)|BUF[4]; |
adaphoto | 0:35bba382318b | 359 | InBuffer[2] = -InBuffer[2]; |
adaphoto | 0:35bba382318b | 360 | |
adaphoto | 0:35bba382318b | 361 | for(i = 0; i < 3; i ++) |
adaphoto | 0:35bba382318b | 362 | { |
adaphoto | 0:35bba382318b | 363 | MPU9250_CalAvgValue(&MPU9250_Filter[i].Index, MPU9250_Filter[i].AvgBuffer, InBuffer[i], OutBuffer + i); |
adaphoto | 0:35bba382318b | 364 | } |
adaphoto | 0:35bba382318b | 365 | magn[0] = *(OutBuffer + 0)-MPU9250_Magn_Offset.X_Off_Err; |
adaphoto | 0:35bba382318b | 366 | magn[1] = *(OutBuffer + 1)-MPU9250_Magn_Offset.Y_Off_Err; |
adaphoto | 0:35bba382318b | 367 | magn[2] = *(OutBuffer + 2)-MPU9250_Magn_Offset.Z_Off_Err; |
adaphoto | 0:35bba382318b | 368 | } |
adaphoto | 0:35bba382318b | 369 | |
adaphoto | 0:35bba382318b | 370 | /** |
adaphoto | 0:35bba382318b | 371 | * @brief Check MPU9250,ensure communication succeed |
adaphoto | 0:35bba382318b | 372 | * @param None |
adaphoto | 0:35bba382318b | 373 | * @retval true: communicate succeed |
adaphoto | 0:35bba382318b | 374 | * false: communicate fualt |
adaphoto | 0:35bba382318b | 375 | */ |
adaphoto | 0:35bba382318b | 376 | bool IMU::MPU9250_Check(void) |
adaphoto | 0:35bba382318b | 377 | { |
adaphoto | 0:35bba382318b | 378 | if(WHO_AM_I_VAL == I2C_ReadOneByte(DEFAULT_ADDRESS, WHO_AM_I)) |
adaphoto | 0:35bba382318b | 379 | { |
adaphoto | 0:35bba382318b | 380 | return true; |
adaphoto | 0:35bba382318b | 381 | } |
adaphoto | 0:35bba382318b | 382 | else |
adaphoto | 0:35bba382318b | 383 | { |
adaphoto | 0:35bba382318b | 384 | return false; |
adaphoto | 0:35bba382318b | 385 | } |
adaphoto | 0:35bba382318b | 386 | } |
adaphoto | 0:35bba382318b | 387 | |
adaphoto | 0:35bba382318b | 388 | /** |
adaphoto | 0:35bba382318b | 389 | * @brief Initializes gyroscopes offset |
adaphoto | 0:35bba382318b | 390 | * @param None |
adaphoto | 0:35bba382318b | 391 | * @retval None |
adaphoto | 0:35bba382318b | 392 | */ |
adaphoto | 0:35bba382318b | 393 | void IMU::MPU9250_InitGyrOffset(void) |
adaphoto | 0:35bba382318b | 394 | { |
adaphoto | 0:35bba382318b | 395 | uint8_t i; |
adaphoto | 0:35bba382318b | 396 | int32_t TempGx = 0, TempGy = 0, TempGz = 0; |
adaphoto | 0:35bba382318b | 397 | |
adaphoto | 0:35bba382318b | 398 | for(i = 0; i < 32; i ++) |
adaphoto | 0:35bba382318b | 399 | { |
adaphoto | 0:35bba382318b | 400 | MPU9250_READ_GYRO(); |
adaphoto | 0:35bba382318b | 401 | |
adaphoto | 0:35bba382318b | 402 | TempGx += gyro[0]; |
adaphoto | 0:35bba382318b | 403 | TempGy += gyro[1]; |
adaphoto | 0:35bba382318b | 404 | TempGz += gyro[2]; |
adaphoto | 0:35bba382318b | 405 | |
adaphoto | 0:35bba382318b | 406 | Thread::wait(1); |
adaphoto | 0:35bba382318b | 407 | } |
adaphoto | 0:35bba382318b | 408 | |
adaphoto | 0:35bba382318b | 409 | MPU9250_Offset.X = TempGx >> 5; |
adaphoto | 0:35bba382318b | 410 | MPU9250_Offset.Y = TempGy >> 5; |
adaphoto | 0:35bba382318b | 411 | MPU9250_Offset.Z = TempGz >> 5; |
adaphoto | 0:35bba382318b | 412 | |
adaphoto | 1:7cf70724bdb0 | 413 | } |
adaphoto | 1:7cf70724bdb0 | 414 | |
adaphoto | 1:7cf70724bdb0 | 415 | //****************************************************** |
adaphoto | 1:7cf70724bdb0 | 416 | //下面的代码是BMP180 |
adaphoto | 1:7cf70724bdb0 | 417 | //****************************************************** |
adaphoto | 1:7cf70724bdb0 | 418 | /** |
adaphoto | 1:7cf70724bdb0 | 419 | * @brief Digital filter |
adaphoto | 1:7cf70724bdb0 | 420 | * @param *pIndex: |
adaphoto | 1:7cf70724bdb0 | 421 | * @param *pAvgBuffer: |
adaphoto | 1:7cf70724bdb0 | 422 | * @param InVal: |
adaphoto | 1:7cf70724bdb0 | 423 | * @param pOutVal: |
adaphoto | 1:7cf70724bdb0 | 424 | * |
adaphoto | 1:7cf70724bdb0 | 425 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 426 | * |
adaphoto | 1:7cf70724bdb0 | 427 | */ |
adaphoto | 1:7cf70724bdb0 | 428 | void IMU::BMP180_CalAvgValue(uint8_t *pIndex, int32_t *pAvgBuffer, int32_t InVal, int32_t *pOutVal) |
adaphoto | 1:7cf70724bdb0 | 429 | { |
adaphoto | 1:7cf70724bdb0 | 430 | uint8_t i; |
adaphoto | 1:7cf70724bdb0 | 431 | |
adaphoto | 1:7cf70724bdb0 | 432 | *(pAvgBuffer + ((*pIndex) ++)) = InVal; |
adaphoto | 1:7cf70724bdb0 | 433 | *pIndex &= 0x07; |
adaphoto | 1:7cf70724bdb0 | 434 | |
adaphoto | 1:7cf70724bdb0 | 435 | *pOutVal = 0; |
adaphoto | 1:7cf70724bdb0 | 436 | for(i = 0; i < 8; i ++) |
adaphoto | 1:7cf70724bdb0 | 437 | { |
adaphoto | 1:7cf70724bdb0 | 438 | *pOutVal += *(pAvgBuffer + i); |
adaphoto | 1:7cf70724bdb0 | 439 | } |
adaphoto | 1:7cf70724bdb0 | 440 | *pOutVal >>= 3; |
adaphoto | 1:7cf70724bdb0 | 441 | } |
adaphoto | 1:7cf70724bdb0 | 442 | |
adaphoto | 1:7cf70724bdb0 | 443 | /** |
adaphoto | 1:7cf70724bdb0 | 444 | * @brief Start temperature measurement |
adaphoto | 1:7cf70724bdb0 | 445 | * @param None |
adaphoto | 1:7cf70724bdb0 | 446 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 447 | */ |
adaphoto | 1:7cf70724bdb0 | 448 | void IMU::BMP180_StartTemperatureMeasurement(void) |
adaphoto | 1:7cf70724bdb0 | 449 | { |
adaphoto | 1:7cf70724bdb0 | 450 | //BMP180_WriteReg(CONTROL, READ_TEMPERATURE); |
adaphoto | 1:7cf70724bdb0 | 451 | I2C_WriteOneByte(BMP180_ADDR, CONTROL, READ_TEMPERATURE); |
adaphoto | 1:7cf70724bdb0 | 452 | } |
adaphoto | 1:7cf70724bdb0 | 453 | |
adaphoto | 1:7cf70724bdb0 | 454 | /** |
adaphoto | 1:7cf70724bdb0 | 455 | * @brief Start pressure measurement |
adaphoto | 1:7cf70724bdb0 | 456 | * @param None |
adaphoto | 1:7cf70724bdb0 | 457 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 458 | */ |
adaphoto | 1:7cf70724bdb0 | 459 | void IMU::BMP180_StartPressureMeasurement(void) |
adaphoto | 1:7cf70724bdb0 | 460 | { |
adaphoto | 1:7cf70724bdb0 | 461 | //BMP180_WriteReg(CONTROL, READ_PRESSURE + (_oss << 6)); |
adaphoto | 1:7cf70724bdb0 | 462 | I2C_WriteOneByte(BMP180_ADDR, CONTROL, READ_PRESSURE + (_oss << 6)); |
adaphoto | 1:7cf70724bdb0 | 463 | } |
adaphoto | 1:7cf70724bdb0 | 464 | |
adaphoto | 1:7cf70724bdb0 | 465 | /** |
adaphoto | 1:7cf70724bdb0 | 466 | * @brief Read uncompensated temperature |
adaphoto | 1:7cf70724bdb0 | 467 | * @param None |
adaphoto | 1:7cf70724bdb0 | 468 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 469 | */ |
adaphoto | 1:7cf70724bdb0 | 470 | void IMU::BMP180_ReadUncompensatedTemperature(void) |
adaphoto | 1:7cf70724bdb0 | 471 | { |
adaphoto | 1:7cf70724bdb0 | 472 | char RegBuff[2]; |
adaphoto | 1:7cf70724bdb0 | 473 | BMP180_ReadReg(CONTROL_OUTPUT, 2, &RegBuff[0]); |
adaphoto | 1:7cf70724bdb0 | 474 | |
adaphoto | 1:7cf70724bdb0 | 475 | UT = ((int32_t)RegBuff[0] << 8) + (int32_t)RegBuff[1]; |
adaphoto | 1:7cf70724bdb0 | 476 | } |
adaphoto | 1:7cf70724bdb0 | 477 | |
adaphoto | 1:7cf70724bdb0 | 478 | /** |
adaphoto | 1:7cf70724bdb0 | 479 | * @brief Read uncompensated pressure |
adaphoto | 1:7cf70724bdb0 | 480 | * @param None |
adaphoto | 1:7cf70724bdb0 | 481 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 482 | */ |
adaphoto | 1:7cf70724bdb0 | 483 | void IMU::BMP180_ReadUncompensatedPressure(void) |
adaphoto | 1:7cf70724bdb0 | 484 | { |
adaphoto | 1:7cf70724bdb0 | 485 | char RegBuff[3]; |
adaphoto | 1:7cf70724bdb0 | 486 | |
adaphoto | 1:7cf70724bdb0 | 487 | BMP180_ReadReg(CONTROL_OUTPUT, 3, &RegBuff[0]); |
adaphoto | 1:7cf70724bdb0 | 488 | |
adaphoto | 1:7cf70724bdb0 | 489 | UP = (((int32_t)RegBuff[0] << 16) + ((int32_t)RegBuff[1] << 8) + ((int32_t)RegBuff[2])) >> (8 -_oss); // uncompensated pressure value |
adaphoto | 1:7cf70724bdb0 | 490 | } |
adaphoto | 1:7cf70724bdb0 | 491 | |
adaphoto | 1:7cf70724bdb0 | 492 | /** |
adaphoto | 1:7cf70724bdb0 | 493 | * @brief Calculate true temperature |
adaphoto | 1:7cf70724bdb0 | 494 | * @param *pTrueTemperature: true temperature |
adaphoto | 1:7cf70724bdb0 | 495 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 496 | */ |
adaphoto | 1:7cf70724bdb0 | 497 | void IMU::BMP180_CalculateTrueTemperature(int32_t *pTrueTemperature) |
adaphoto | 1:7cf70724bdb0 | 498 | { |
adaphoto | 1:7cf70724bdb0 | 499 | int32_t X1, X2; |
adaphoto | 1:7cf70724bdb0 | 500 | |
adaphoto | 1:7cf70724bdb0 | 501 | X1 = ((UT - AC6) * AC5) >> 15; |
adaphoto | 1:7cf70724bdb0 | 502 | X2 = (MC << 11) / (X1 + MD); |
adaphoto | 1:7cf70724bdb0 | 503 | B5 = X1 + X2; |
adaphoto | 1:7cf70724bdb0 | 504 | *pTrueTemperature = (B5 + 8) >> 4; |
adaphoto | 1:7cf70724bdb0 | 505 | } |
adaphoto | 1:7cf70724bdb0 | 506 | |
adaphoto | 1:7cf70724bdb0 | 507 | /** |
adaphoto | 1:7cf70724bdb0 | 508 | * @brief Calculate true pressure |
adaphoto | 1:7cf70724bdb0 | 509 | * @param *pTruePressure: true pressure |
adaphoto | 1:7cf70724bdb0 | 510 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 511 | */ |
adaphoto | 1:7cf70724bdb0 | 512 | void IMU::BMP180_CalculateTruePressure(int32_t *pTruePressure) |
adaphoto | 1:7cf70724bdb0 | 513 | { |
adaphoto | 1:7cf70724bdb0 | 514 | int32_t X1, X2, X3, B3, B6, P, Temp; |
adaphoto | 1:7cf70724bdb0 | 515 | uint32_t B4, B7; |
adaphoto | 1:7cf70724bdb0 | 516 | |
adaphoto | 1:7cf70724bdb0 | 517 | B6 = B5 - 4000; |
adaphoto | 1:7cf70724bdb0 | 518 | X1 = (B2* ((B6 * B6) >> 12)) >> 11; |
adaphoto | 1:7cf70724bdb0 | 519 | X2 = AC2 * B6 >> 11; |
adaphoto | 1:7cf70724bdb0 | 520 | X3 = X1 + X2; |
adaphoto | 1:7cf70724bdb0 | 521 | Temp = (((int32_t)AC1 << 2) + X3) << _oss; |
adaphoto | 1:7cf70724bdb0 | 522 | B3 = (Temp + 2) >> 2; |
adaphoto | 1:7cf70724bdb0 | 523 | X1 = (AC3 * B6) >> 13; |
adaphoto | 1:7cf70724bdb0 | 524 | X2 = (B1 * (B6 * B6 >> 12)) >> 16; |
adaphoto | 1:7cf70724bdb0 | 525 | X3 = ((X1 + X2) + 2) >> 2; |
adaphoto | 1:7cf70724bdb0 | 526 | B4 = (AC4 * (uint32_t) (X3 + 32768)) >> 15; |
adaphoto | 1:7cf70724bdb0 | 527 | B7 = ((uint32_t)UP - B3) * (50000 >> _oss); |
adaphoto | 1:7cf70724bdb0 | 528 | if(B7 < 0x80000000) |
adaphoto | 1:7cf70724bdb0 | 529 | { |
adaphoto | 1:7cf70724bdb0 | 530 | P = (B7 << 1) / B4; |
adaphoto | 1:7cf70724bdb0 | 531 | } |
adaphoto | 1:7cf70724bdb0 | 532 | else |
adaphoto | 1:7cf70724bdb0 | 533 | { |
adaphoto | 1:7cf70724bdb0 | 534 | P = (B7 / B4) << 1; |
adaphoto | 1:7cf70724bdb0 | 535 | } |
adaphoto | 1:7cf70724bdb0 | 536 | |
adaphoto | 1:7cf70724bdb0 | 537 | X1 = (P >> 8) * (P >> 8); |
adaphoto | 1:7cf70724bdb0 | 538 | X1 = (X1 * 3038) >> 16; |
adaphoto | 1:7cf70724bdb0 | 539 | X2 = (-7357 * P) >> 16; |
adaphoto | 1:7cf70724bdb0 | 540 | |
adaphoto | 1:7cf70724bdb0 | 541 | *pTruePressure = P + ((X1 + X2 + 3791) >> 4); |
adaphoto | 1:7cf70724bdb0 | 542 | } |
adaphoto | 1:7cf70724bdb0 | 543 | |
adaphoto | 1:7cf70724bdb0 | 544 | /** |
adaphoto | 1:7cf70724bdb0 | 545 | * @brief Calculating average value of pressure |
adaphoto | 1:7cf70724bdb0 | 546 | * @param *pVal: the average value of pressure |
adaphoto | 1:7cf70724bdb0 | 547 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 548 | */ |
adaphoto | 1:7cf70724bdb0 | 549 | void IMU::BMP180_LocalpressureAvg(int32_t *pVal) |
adaphoto | 1:7cf70724bdb0 | 550 | { |
adaphoto | 1:7cf70724bdb0 | 551 | uint8_t i; |
adaphoto | 1:7cf70724bdb0 | 552 | int32_t Sum = 0; |
adaphoto | 1:7cf70724bdb0 | 553 | |
adaphoto | 1:7cf70724bdb0 | 554 | for(i = 0; i < 5; i ++) |
adaphoto | 1:7cf70724bdb0 | 555 | { |
adaphoto | 1:7cf70724bdb0 | 556 | BMP180_StartTemperatureMeasurement(); |
adaphoto | 1:7cf70724bdb0 | 557 | Thread::wait(5);//delay_ms(5); //4.5ms 324 |
adaphoto | 1:7cf70724bdb0 | 558 | BMP180_ReadUncompensatedTemperature(); |
adaphoto | 1:7cf70724bdb0 | 559 | BMP180_StartPressureMeasurement(); |
adaphoto | 1:7cf70724bdb0 | 560 | Thread::wait(5);//delay_ms(8);//7.5ms 540 |
adaphoto | 1:7cf70724bdb0 | 561 | BMP180_ReadUncompensatedPressure(); |
adaphoto | 1:7cf70724bdb0 | 562 | BMP180_CalculateTruePressure(&PressureVal); |
adaphoto | 1:7cf70724bdb0 | 563 | BMP180_CalculateTrueTemperature(&TemperatureVal); |
adaphoto | 1:7cf70724bdb0 | 564 | |
adaphoto | 1:7cf70724bdb0 | 565 | if(i >= 2) |
adaphoto | 1:7cf70724bdb0 | 566 | { |
adaphoto | 1:7cf70724bdb0 | 567 | Sum += PressureVal; |
adaphoto | 1:7cf70724bdb0 | 568 | } |
adaphoto | 1:7cf70724bdb0 | 569 | } |
adaphoto | 1:7cf70724bdb0 | 570 | *pVal = Sum / 3; |
adaphoto | 1:7cf70724bdb0 | 571 | } |
adaphoto | 1:7cf70724bdb0 | 572 | |
adaphoto | 1:7cf70724bdb0 | 573 | /** |
adaphoto | 1:7cf70724bdb0 | 574 | * @brief Calculating pressure at sea level |
adaphoto | 1:7cf70724bdb0 | 575 | * @param None |
adaphoto | 1:7cf70724bdb0 | 576 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 577 | */ |
adaphoto | 1:7cf70724bdb0 | 578 | void IMU::BMP180_PressureAtSeaLevel(void) |
adaphoto | 1:7cf70724bdb0 | 579 | { |
adaphoto | 1:7cf70724bdb0 | 580 | float Temp = 0.0f; |
adaphoto | 1:7cf70724bdb0 | 581 | |
adaphoto | 1:7cf70724bdb0 | 582 | BMP180_LocalpressureAvg(&PressureVal); |
adaphoto | 1:7cf70724bdb0 | 583 | |
adaphoto | 1:7cf70724bdb0 | 584 | Temp = (float)LOCAL_ADS_ALTITUDE / 4433000; |
adaphoto | 1:7cf70724bdb0 | 585 | Temp = (float)pow((1 - Temp), 5.255f); |
adaphoto | 1:7cf70724bdb0 | 586 | Pressure0 = (PressureVal - PRESSURE_OFFSET) / Temp;// |
adaphoto | 1:7cf70724bdb0 | 587 | } |
adaphoto | 1:7cf70724bdb0 | 588 | |
adaphoto | 1:7cf70724bdb0 | 589 | /** |
adaphoto | 1:7cf70724bdb0 | 590 | * @brief Calculating absolute altitude |
adaphoto | 1:7cf70724bdb0 | 591 | * @param *pAltitude: absolute altitude |
adaphoto | 1:7cf70724bdb0 | 592 | * @param PressureVal: the pressure at the absolute altitude |
adaphoto | 1:7cf70724bdb0 | 593 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 594 | */ |
adaphoto | 1:7cf70724bdb0 | 595 | void IMU::BMP180_CalculateAbsoluteAltitude(int32_t *pAltitude, int32_t PressureVal) |
adaphoto | 1:7cf70724bdb0 | 596 | { |
adaphoto | 1:7cf70724bdb0 | 597 | *pAltitude = 4433000 * (1 - pow((float)(PressureVal / (float)Pressure0), 0.1903f)); |
adaphoto | 1:7cf70724bdb0 | 598 | } |
adaphoto | 1:7cf70724bdb0 | 599 | |
adaphoto | 1:7cf70724bdb0 | 600 | /** |
adaphoto | 1:7cf70724bdb0 | 601 | * @brief Read calibration data from the EEPROM of the BMP180 |
adaphoto | 1:7cf70724bdb0 | 602 | * @param None |
adaphoto | 1:7cf70724bdb0 | 603 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 604 | */ |
adaphoto | 1:7cf70724bdb0 | 605 | void IMU::BMP180_ReadCalibrationData(void) |
adaphoto | 1:7cf70724bdb0 | 606 | { |
adaphoto | 1:7cf70724bdb0 | 607 | char RegBuff[2]; |
adaphoto | 1:7cf70724bdb0 | 608 | |
adaphoto | 1:7cf70724bdb0 | 609 | BMP180_ReadReg(CAL_AC1, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 610 | AC1 = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 611 | |
adaphoto | 1:7cf70724bdb0 | 612 | BMP180_ReadReg(CAL_AC2, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 613 | AC2 = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 614 | |
adaphoto | 1:7cf70724bdb0 | 615 | BMP180_ReadReg(CAL_AC3, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 616 | AC3 = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 617 | |
adaphoto | 1:7cf70724bdb0 | 618 | BMP180_ReadReg(CAL_AC4, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 619 | AC4 = ((uint16_t)RegBuff[0] <<8 | ((uint16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 620 | |
adaphoto | 1:7cf70724bdb0 | 621 | BMP180_ReadReg(CAL_AC5, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 622 | AC5 = ((uint16_t)RegBuff[0] <<8 | ((uint16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 623 | |
adaphoto | 1:7cf70724bdb0 | 624 | BMP180_ReadReg(CAL_AC6, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 625 | AC6 = ((uint16_t)RegBuff[0] <<8 | ((uint16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 626 | |
adaphoto | 1:7cf70724bdb0 | 627 | BMP180_ReadReg(CAL_B1, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 628 | B1 = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 629 | |
adaphoto | 1:7cf70724bdb0 | 630 | BMP180_ReadReg(CAL_B2, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 631 | B2 = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 632 | |
adaphoto | 1:7cf70724bdb0 | 633 | BMP180_ReadReg(CAL_MB, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 634 | MB = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 635 | |
adaphoto | 1:7cf70724bdb0 | 636 | BMP180_ReadReg(CAL_MC, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 637 | MC = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 638 | |
adaphoto | 1:7cf70724bdb0 | 639 | BMP180_ReadReg(CAL_MD, 2, RegBuff); |
adaphoto | 1:7cf70724bdb0 | 640 | MD = ((int16_t)RegBuff[0] <<8 | ((int16_t)RegBuff[1])); |
adaphoto | 1:7cf70724bdb0 | 641 | } |
adaphoto | 1:7cf70724bdb0 | 642 | |
adaphoto | 1:7cf70724bdb0 | 643 | /** |
adaphoto | 1:7cf70724bdb0 | 644 | * @brief Configures hardware pressure sampling accuracy modes |
adaphoto | 1:7cf70724bdb0 | 645 | * @param None |
adaphoto | 1:7cf70724bdb0 | 646 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 647 | */ |
adaphoto | 1:7cf70724bdb0 | 648 | void IMU::BMP180_SetOversample(void) |
adaphoto | 1:7cf70724bdb0 | 649 | { |
adaphoto | 1:7cf70724bdb0 | 650 | _oss = MODE_ULTRA_HIGHRES; |
adaphoto | 1:7cf70724bdb0 | 651 | } |
adaphoto | 1:7cf70724bdb0 | 652 | |
adaphoto | 1:7cf70724bdb0 | 653 | /** |
adaphoto | 1:7cf70724bdb0 | 654 | * @brief initializes BMP180 |
adaphoto | 1:7cf70724bdb0 | 655 | * @param None |
adaphoto | 1:7cf70724bdb0 | 656 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 657 | */ |
adaphoto | 1:7cf70724bdb0 | 658 | void IMU::BMP180_Init(void) |
adaphoto | 1:7cf70724bdb0 | 659 | { |
adaphoto | 1:7cf70724bdb0 | 660 | BMP180_SetOversample(); |
adaphoto | 1:7cf70724bdb0 | 661 | BMP180_ReadCalibrationData(); |
adaphoto | 1:7cf70724bdb0 | 662 | //BMP180_PressureAtSeaLevel(); |
adaphoto | 1:7cf70724bdb0 | 663 | } |
adaphoto | 1:7cf70724bdb0 | 664 | |
adaphoto | 1:7cf70724bdb0 | 665 | /** |
adaphoto | 1:7cf70724bdb0 | 666 | * @brief Calculation of pressure and temperature and altitude for BMP180 |
adaphoto | 1:7cf70724bdb0 | 667 | * @param None |
adaphoto | 1:7cf70724bdb0 | 668 | * @retval None |
adaphoto | 1:7cf70724bdb0 | 669 | */ |
adaphoto | 1:7cf70724bdb0 | 670 | void IMU::CalTemperatureAndPressureAndAltitude(void) |
adaphoto | 1:7cf70724bdb0 | 671 | { |
adaphoto | 1:7cf70724bdb0 | 672 | static uint8_t State = START_TEMPERATURE_MEASUREMENT; |
adaphoto | 1:7cf70724bdb0 | 673 | static BMP180_AvgTypeDef BMP180_Filter[3]; |
adaphoto | 1:7cf70724bdb0 | 674 | int32_t PVal,AVal, TVal; |
adaphoto | 1:7cf70724bdb0 | 675 | |
adaphoto | 1:7cf70724bdb0 | 676 | switch(State) |
adaphoto | 1:7cf70724bdb0 | 677 | { |
adaphoto | 1:7cf70724bdb0 | 678 | case START_TEMPERATURE_MEASUREMENT: |
adaphoto | 1:7cf70724bdb0 | 679 | BMP180_StartTemperatureMeasurement(); |
adaphoto | 1:7cf70724bdb0 | 680 | Thread::wait(5);//delay_ms(5); //4.5ms |
adaphoto | 1:7cf70724bdb0 | 681 | State = READ_UT_AND_START_PRESSURE_MEASUREMENT; |
adaphoto | 1:7cf70724bdb0 | 682 | break; |
adaphoto | 1:7cf70724bdb0 | 683 | |
adaphoto | 1:7cf70724bdb0 | 684 | case READ_UT_AND_START_PRESSURE_MEASUREMENT: |
adaphoto | 1:7cf70724bdb0 | 685 | BMP180_ReadUncompensatedTemperature(); |
adaphoto | 1:7cf70724bdb0 | 686 | BMP180_StartPressureMeasurement(); |
adaphoto | 1:7cf70724bdb0 | 687 | Thread::wait(10);//delay_ms(10);//7.5ms |
adaphoto | 1:7cf70724bdb0 | 688 | State = READ_UP_CAL_TRUE_PRESSURE_TEMPERATURE; |
adaphoto | 1:7cf70724bdb0 | 689 | break; |
adaphoto | 1:7cf70724bdb0 | 690 | |
adaphoto | 1:7cf70724bdb0 | 691 | case READ_UP_CAL_TRUE_PRESSURE_TEMPERATURE: |
adaphoto | 1:7cf70724bdb0 | 692 | BMP180_ReadUncompensatedPressure(); |
adaphoto | 1:7cf70724bdb0 | 693 | BMP180_CalculateTruePressure(&PVal); |
adaphoto | 1:7cf70724bdb0 | 694 | BMP180_CalAvgValue(&BMP180_Filter[0].Index, BMP180_Filter[0].AvgBuffer, PVal - PRESSURE_OFFSET, &PressureVal); |
adaphoto | 1:7cf70724bdb0 | 695 | |
adaphoto | 1:7cf70724bdb0 | 696 | BMP180_CalculateAbsoluteAltitude(&AVal, PVal - PRESSURE_OFFSET); |
adaphoto | 1:7cf70724bdb0 | 697 | BMP180_CalAvgValue(&BMP180_Filter[1].Index, BMP180_Filter[1].AvgBuffer, AVal, &AltitudeVal); |
adaphoto | 1:7cf70724bdb0 | 698 | |
adaphoto | 1:7cf70724bdb0 | 699 | BMP180_CalculateTrueTemperature(&TVal); |
adaphoto | 1:7cf70724bdb0 | 700 | BMP180_CalAvgValue(&BMP180_Filter[2].Index, BMP180_Filter[2].AvgBuffer, TVal, &TemperatureVal); |
adaphoto | 1:7cf70724bdb0 | 701 | |
adaphoto | 1:7cf70724bdb0 | 702 | State = START_TEMPERATURE_MEASUREMENT; |
adaphoto | 1:7cf70724bdb0 | 703 | break; |
adaphoto | 1:7cf70724bdb0 | 704 | |
adaphoto | 1:7cf70724bdb0 | 705 | default: |
adaphoto | 1:7cf70724bdb0 | 706 | break; |
adaphoto | 1:7cf70724bdb0 | 707 | } |
adaphoto | 0:35bba382318b | 708 | } |