気圧・温度・湿度センサBME280を使うためのライブラリ
BME280_lib.cpp@1:0a0ad1327b0f, 2019-02-19 (annotated)
- Committer:
- Sigma884
- Date:
- Tue Feb 19 12:35:35 2019 +0000
- Revision:
- 1:0a0ad1327b0f
- Parent:
- 0:9f2a22c6ced2
MODE -> BME_MODE
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Sigma884 | 0:9f2a22c6ced2 | 1 | #include "mbed.h" |
Sigma884 | 0:9f2a22c6ced2 | 2 | #include "BME280_lib.h" |
Sigma884 | 0:9f2a22c6ced2 | 3 | |
Sigma884 | 0:9f2a22c6ced2 | 4 | BME280_lib::BME280_lib(I2C &user_i2c, AD0 ad0){ |
Sigma884 | 0:9f2a22c6ced2 | 5 | i2c = &user_i2c; |
Sigma884 | 0:9f2a22c6ced2 | 6 | slave = ad0; |
Sigma884 | 0:9f2a22c6ced2 | 7 | |
Sigma884 | 0:9f2a22c6ced2 | 8 | i2c -> frequency(400000); |
Sigma884 | 0:9f2a22c6ced2 | 9 | |
Sigma884 | 0:9f2a22c6ced2 | 10 | configMeasure(NORMAL, 1, 1, 1); |
Sigma884 | 0:9f2a22c6ced2 | 11 | configFilter(0); |
Sigma884 | 0:9f2a22c6ced2 | 12 | |
Sigma884 | 0:9f2a22c6ced2 | 13 | readCOMP(); |
Sigma884 | 0:9f2a22c6ced2 | 14 | } |
Sigma884 | 0:9f2a22c6ced2 | 15 | |
Sigma884 | 0:9f2a22c6ced2 | 16 | int BME280_lib::connectCheck(){ |
Sigma884 | 0:9f2a22c6ced2 | 17 | cmd[0] = BME_ID; |
Sigma884 | 0:9f2a22c6ced2 | 18 | i2c -> write(slave << 1, cmd, 1); |
Sigma884 | 0:9f2a22c6ced2 | 19 | i2c -> read(slave << 1 | 1, buff, 1); |
Sigma884 | 0:9f2a22c6ced2 | 20 | |
Sigma884 | 0:9f2a22c6ced2 | 21 | if(buff[0] == 0x60){ |
Sigma884 | 0:9f2a22c6ced2 | 22 | return 1; |
Sigma884 | 0:9f2a22c6ced2 | 23 | } |
Sigma884 | 0:9f2a22c6ced2 | 24 | else{ |
Sigma884 | 0:9f2a22c6ced2 | 25 | return 0; |
Sigma884 | 0:9f2a22c6ced2 | 26 | } |
Sigma884 | 0:9f2a22c6ced2 | 27 | } |
Sigma884 | 0:9f2a22c6ced2 | 28 | |
Sigma884 | 1:0a0ad1327b0f | 29 | void BME280_lib::configMeasure(BME_MODE mode, int temp_over_sampling, int pres_over_sampling, int hum_over_sampling){ |
Sigma884 | 0:9f2a22c6ced2 | 30 | cmd[0] = BME_CTRL_HUM; |
Sigma884 | 0:9f2a22c6ced2 | 31 | switch(hum_over_sampling){ |
Sigma884 | 0:9f2a22c6ced2 | 32 | case 0: |
Sigma884 | 0:9f2a22c6ced2 | 33 | cmd[1] = 0x00; |
Sigma884 | 0:9f2a22c6ced2 | 34 | break; |
Sigma884 | 0:9f2a22c6ced2 | 35 | |
Sigma884 | 0:9f2a22c6ced2 | 36 | case 1: |
Sigma884 | 0:9f2a22c6ced2 | 37 | cmd[1] = 0x01; |
Sigma884 | 0:9f2a22c6ced2 | 38 | break; |
Sigma884 | 0:9f2a22c6ced2 | 39 | |
Sigma884 | 0:9f2a22c6ced2 | 40 | case 2: |
Sigma884 | 0:9f2a22c6ced2 | 41 | cmd[1] = 0x02; |
Sigma884 | 0:9f2a22c6ced2 | 42 | break; |
Sigma884 | 0:9f2a22c6ced2 | 43 | |
Sigma884 | 0:9f2a22c6ced2 | 44 | case 4: |
Sigma884 | 0:9f2a22c6ced2 | 45 | cmd[1] = 0x03; |
Sigma884 | 0:9f2a22c6ced2 | 46 | break; |
Sigma884 | 0:9f2a22c6ced2 | 47 | |
Sigma884 | 0:9f2a22c6ced2 | 48 | case 8: |
Sigma884 | 0:9f2a22c6ced2 | 49 | cmd[1] = 0x04; |
Sigma884 | 0:9f2a22c6ced2 | 50 | break; |
Sigma884 | 0:9f2a22c6ced2 | 51 | |
Sigma884 | 0:9f2a22c6ced2 | 52 | case 16: |
Sigma884 | 0:9f2a22c6ced2 | 53 | cmd[1] = 0x05; |
Sigma884 | 0:9f2a22c6ced2 | 54 | break; |
Sigma884 | 0:9f2a22c6ced2 | 55 | |
Sigma884 | 0:9f2a22c6ced2 | 56 | default: |
Sigma884 | 0:9f2a22c6ced2 | 57 | cmd[1] = 0x00; |
Sigma884 | 0:9f2a22c6ced2 | 58 | } |
Sigma884 | 0:9f2a22c6ced2 | 59 | i2c -> write(slave << 1, cmd, 2); |
Sigma884 | 0:9f2a22c6ced2 | 60 | |
Sigma884 | 0:9f2a22c6ced2 | 61 | cmd[0] = BME_CTRL_MEAS; |
Sigma884 | 0:9f2a22c6ced2 | 62 | cmd[1] = mode; |
Sigma884 | 0:9f2a22c6ced2 | 63 | switch(pres_over_sampling){ |
Sigma884 | 0:9f2a22c6ced2 | 64 | case 0: |
Sigma884 | 0:9f2a22c6ced2 | 65 | cmd[1] = cmd[1] | (0x00 << 2); |
Sigma884 | 0:9f2a22c6ced2 | 66 | break; |
Sigma884 | 0:9f2a22c6ced2 | 67 | |
Sigma884 | 0:9f2a22c6ced2 | 68 | case 1: |
Sigma884 | 0:9f2a22c6ced2 | 69 | cmd[1] = cmd[1] | (0x01 << 2); |
Sigma884 | 0:9f2a22c6ced2 | 70 | break; |
Sigma884 | 0:9f2a22c6ced2 | 71 | |
Sigma884 | 0:9f2a22c6ced2 | 72 | case 2: |
Sigma884 | 0:9f2a22c6ced2 | 73 | cmd[1] = cmd[1] | (0x02 << 2); |
Sigma884 | 0:9f2a22c6ced2 | 74 | break; |
Sigma884 | 0:9f2a22c6ced2 | 75 | |
Sigma884 | 0:9f2a22c6ced2 | 76 | case 4: |
Sigma884 | 0:9f2a22c6ced2 | 77 | cmd[1] = cmd[1] | (0x03 << 2); |
Sigma884 | 0:9f2a22c6ced2 | 78 | break; |
Sigma884 | 0:9f2a22c6ced2 | 79 | |
Sigma884 | 0:9f2a22c6ced2 | 80 | case 8: |
Sigma884 | 0:9f2a22c6ced2 | 81 | cmd[1] = cmd[1] | (0x04 << 2); |
Sigma884 | 0:9f2a22c6ced2 | 82 | break; |
Sigma884 | 0:9f2a22c6ced2 | 83 | |
Sigma884 | 0:9f2a22c6ced2 | 84 | case 16: |
Sigma884 | 0:9f2a22c6ced2 | 85 | cmd[1] = cmd[1] | (0x05 << 2); |
Sigma884 | 0:9f2a22c6ced2 | 86 | break; |
Sigma884 | 0:9f2a22c6ced2 | 87 | |
Sigma884 | 0:9f2a22c6ced2 | 88 | default: |
Sigma884 | 0:9f2a22c6ced2 | 89 | cmd[1] = cmd[1] | (0x00 << 2); |
Sigma884 | 0:9f2a22c6ced2 | 90 | } |
Sigma884 | 0:9f2a22c6ced2 | 91 | switch(temp_over_sampling){ |
Sigma884 | 0:9f2a22c6ced2 | 92 | case 0: |
Sigma884 | 0:9f2a22c6ced2 | 93 | cmd[1] = cmd[1] | (0x00 << 5); |
Sigma884 | 0:9f2a22c6ced2 | 94 | break; |
Sigma884 | 0:9f2a22c6ced2 | 95 | |
Sigma884 | 0:9f2a22c6ced2 | 96 | case 1: |
Sigma884 | 0:9f2a22c6ced2 | 97 | cmd[1] = cmd[1] | (0x01 << 5); |
Sigma884 | 0:9f2a22c6ced2 | 98 | break; |
Sigma884 | 0:9f2a22c6ced2 | 99 | |
Sigma884 | 0:9f2a22c6ced2 | 100 | case 2: |
Sigma884 | 0:9f2a22c6ced2 | 101 | cmd[1] = cmd[1] | (0x02 << 5); |
Sigma884 | 0:9f2a22c6ced2 | 102 | break; |
Sigma884 | 0:9f2a22c6ced2 | 103 | |
Sigma884 | 0:9f2a22c6ced2 | 104 | case 4: |
Sigma884 | 0:9f2a22c6ced2 | 105 | cmd[1] = cmd[1] | (0x03 << 5); |
Sigma884 | 0:9f2a22c6ced2 | 106 | break; |
Sigma884 | 0:9f2a22c6ced2 | 107 | |
Sigma884 | 0:9f2a22c6ced2 | 108 | case 8: |
Sigma884 | 0:9f2a22c6ced2 | 109 | cmd[1] = cmd[1] | (0x04 << 5); |
Sigma884 | 0:9f2a22c6ced2 | 110 | break; |
Sigma884 | 0:9f2a22c6ced2 | 111 | |
Sigma884 | 0:9f2a22c6ced2 | 112 | case 16: |
Sigma884 | 0:9f2a22c6ced2 | 113 | cmd[1] = cmd[1] | (0x05 << 5); |
Sigma884 | 0:9f2a22c6ced2 | 114 | break; |
Sigma884 | 0:9f2a22c6ced2 | 115 | |
Sigma884 | 0:9f2a22c6ced2 | 116 | default: |
Sigma884 | 0:9f2a22c6ced2 | 117 | cmd[1] = cmd[1] | (0x00 << 5); |
Sigma884 | 0:9f2a22c6ced2 | 118 | } |
Sigma884 | 0:9f2a22c6ced2 | 119 | i2c -> write(slave << 1, cmd, 2); |
Sigma884 | 0:9f2a22c6ced2 | 120 | } |
Sigma884 | 0:9f2a22c6ced2 | 121 | |
Sigma884 | 0:9f2a22c6ced2 | 122 | void BME280_lib::configFilter(int filter){ |
Sigma884 | 0:9f2a22c6ced2 | 123 | cmd[0] = BME_CONFIG; |
Sigma884 | 0:9f2a22c6ced2 | 124 | switch(filter){ |
Sigma884 | 0:9f2a22c6ced2 | 125 | case 0: |
Sigma884 | 0:9f2a22c6ced2 | 126 | cmd[1] = 0x00 << 2; |
Sigma884 | 0:9f2a22c6ced2 | 127 | break; |
Sigma884 | 0:9f2a22c6ced2 | 128 | |
Sigma884 | 0:9f2a22c6ced2 | 129 | case 1: |
Sigma884 | 0:9f2a22c6ced2 | 130 | cmd[1] = 0x01 << 2; |
Sigma884 | 0:9f2a22c6ced2 | 131 | break; |
Sigma884 | 0:9f2a22c6ced2 | 132 | |
Sigma884 | 0:9f2a22c6ced2 | 133 | case 2: |
Sigma884 | 0:9f2a22c6ced2 | 134 | cmd[1] = 0x02 << 2; |
Sigma884 | 0:9f2a22c6ced2 | 135 | break; |
Sigma884 | 0:9f2a22c6ced2 | 136 | |
Sigma884 | 0:9f2a22c6ced2 | 137 | case 4: |
Sigma884 | 0:9f2a22c6ced2 | 138 | cmd[1] = 0x03 << 2; |
Sigma884 | 0:9f2a22c6ced2 | 139 | break; |
Sigma884 | 0:9f2a22c6ced2 | 140 | |
Sigma884 | 0:9f2a22c6ced2 | 141 | case 8: |
Sigma884 | 0:9f2a22c6ced2 | 142 | cmd[1] = 0x04 << 2; |
Sigma884 | 0:9f2a22c6ced2 | 143 | break; |
Sigma884 | 0:9f2a22c6ced2 | 144 | |
Sigma884 | 0:9f2a22c6ced2 | 145 | case 16: |
Sigma884 | 0:9f2a22c6ced2 | 146 | cmd[1] = 0x05 << 2; |
Sigma884 | 0:9f2a22c6ced2 | 147 | break; |
Sigma884 | 0:9f2a22c6ced2 | 148 | |
Sigma884 | 0:9f2a22c6ced2 | 149 | default: |
Sigma884 | 0:9f2a22c6ced2 | 150 | cmd[1] = 0x00; |
Sigma884 | 0:9f2a22c6ced2 | 151 | break; |
Sigma884 | 0:9f2a22c6ced2 | 152 | } |
Sigma884 | 0:9f2a22c6ced2 | 153 | i2c -> write(slave << 1, cmd, 2); |
Sigma884 | 0:9f2a22c6ced2 | 154 | } |
Sigma884 | 0:9f2a22c6ced2 | 155 | |
Sigma884 | 0:9f2a22c6ced2 | 156 | void BME280_lib::getData(float *temp, float *pres, float *hum){ |
Sigma884 | 0:9f2a22c6ced2 | 157 | cmd[0] = BME_TEMP; |
Sigma884 | 0:9f2a22c6ced2 | 158 | i2c -> write(slave << 1, cmd, 1); |
Sigma884 | 0:9f2a22c6ced2 | 159 | i2c -> read(slave << 1 | 1, buff, 3); |
Sigma884 | 0:9f2a22c6ced2 | 160 | adc = (buff[0] << 12) | (buff[1] << 4) | (buff[0] >> 4); |
Sigma884 | 0:9f2a22c6ced2 | 161 | *temp = (float)calcT() / 100.0; |
Sigma884 | 0:9f2a22c6ced2 | 162 | |
Sigma884 | 0:9f2a22c6ced2 | 163 | cmd[0] = BME_PRESS; |
Sigma884 | 0:9f2a22c6ced2 | 164 | i2c -> write(slave << 1, cmd, 1); |
Sigma884 | 0:9f2a22c6ced2 | 165 | i2c -> read(slave << 1 | 1, buff, 3); |
Sigma884 | 0:9f2a22c6ced2 | 166 | adc = (buff[0] << 12) | (buff[1] << 4) | (buff[0] >> 4); |
Sigma884 | 0:9f2a22c6ced2 | 167 | *pres = (float)calcP() / 256.0 / 100.0; |
Sigma884 | 0:9f2a22c6ced2 | 168 | |
Sigma884 | 0:9f2a22c6ced2 | 169 | cmd[0] = BME_HUM; |
Sigma884 | 0:9f2a22c6ced2 | 170 | i2c -> write(slave << 1, cmd, 1); |
Sigma884 | 0:9f2a22c6ced2 | 171 | i2c -> read(slave << 1 | 1, buff, 3); |
Sigma884 | 0:9f2a22c6ced2 | 172 | adc = (buff[0] << 8) | buff[1]; |
Sigma884 | 0:9f2a22c6ced2 | 173 | *hum = (float)calcH() / 1024.0; |
Sigma884 | 0:9f2a22c6ced2 | 174 | } |
Sigma884 | 0:9f2a22c6ced2 | 175 | |
Sigma884 | 0:9f2a22c6ced2 | 176 | float BME280_lib::getTemp(){ |
Sigma884 | 0:9f2a22c6ced2 | 177 | getData(&temp, &pres, &hum); |
Sigma884 | 0:9f2a22c6ced2 | 178 | return temp; |
Sigma884 | 0:9f2a22c6ced2 | 179 | } |
Sigma884 | 0:9f2a22c6ced2 | 180 | |
Sigma884 | 0:9f2a22c6ced2 | 181 | float BME280_lib::getPres(){ |
Sigma884 | 0:9f2a22c6ced2 | 182 | getData(&temp, &pres, &hum); |
Sigma884 | 0:9f2a22c6ced2 | 183 | return pres; |
Sigma884 | 0:9f2a22c6ced2 | 184 | } |
Sigma884 | 0:9f2a22c6ced2 | 185 | |
Sigma884 | 0:9f2a22c6ced2 | 186 | float BME280_lib::getHum(){ |
Sigma884 | 0:9f2a22c6ced2 | 187 | getData(&temp, &pres, &hum); |
Sigma884 | 0:9f2a22c6ced2 | 188 | return hum; |
Sigma884 | 0:9f2a22c6ced2 | 189 | } |
Sigma884 | 0:9f2a22c6ced2 | 190 | |
Sigma884 | 0:9f2a22c6ced2 | 191 | float BME280_lib::getAlt(float pres_0, float temp_0){ |
Sigma884 | 0:9f2a22c6ced2 | 192 | pres = getPres(); |
Sigma884 | 0:9f2a22c6ced2 | 193 | return -(273.0 + temp_0) / 0.0342 * log(pres / pres_0); |
Sigma884 | 0:9f2a22c6ced2 | 194 | } |
Sigma884 | 0:9f2a22c6ced2 | 195 | |
Sigma884 | 0:9f2a22c6ced2 | 196 | float BME280_lib::getAlt2(float pres_0, float temp_0){ |
Sigma884 | 0:9f2a22c6ced2 | 197 | pres = getPres(); |
Sigma884 | 0:9f2a22c6ced2 | 198 | return (273.0 + temp_0) / 0.0065 * (1.0 - (float)pow((double)(pres / pres_0), 0.190)); |
Sigma884 | 0:9f2a22c6ced2 | 199 | } |
Sigma884 | 0:9f2a22c6ced2 | 200 | |
Sigma884 | 0:9f2a22c6ced2 | 201 | |
Sigma884 | 0:9f2a22c6ced2 | 202 | void BME280_lib::readCOMP(){ |
Sigma884 | 0:9f2a22c6ced2 | 203 | cmd[0] = BME_COMP1; |
Sigma884 | 0:9f2a22c6ced2 | 204 | i2c -> write(slave << 1, cmd, 1); |
Sigma884 | 0:9f2a22c6ced2 | 205 | i2c -> read(slave << 1 | 1, buff, 25); |
Sigma884 | 0:9f2a22c6ced2 | 206 | dig_T1 = buff[0] | (buff[1] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 207 | dig_T2 = buff[2] | (buff[3] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 208 | dig_T3 = buff[4] | (buff[5] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 209 | dig_P1 = buff[6] | (buff[7] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 210 | dig_P2 = buff[8] | (buff[9] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 211 | dig_P3 = buff[10] | (buff[11] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 212 | dig_P4 = buff[12] | (buff[13] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 213 | dig_P5 = buff[14] | (buff[15] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 214 | dig_P6 = buff[16] | (buff[17] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 215 | dig_P7 = buff[18] | (buff[19] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 216 | dig_P8 = buff[20] | (buff[21] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 217 | dig_P9 = buff[22] | (buff[23] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 218 | dig_H1 = buff[24]; |
Sigma884 | 0:9f2a22c6ced2 | 219 | |
Sigma884 | 0:9f2a22c6ced2 | 220 | cmd[0] = BME_COMP2; |
Sigma884 | 0:9f2a22c6ced2 | 221 | i2c -> write(slave << 1, cmd, 1); |
Sigma884 | 0:9f2a22c6ced2 | 222 | i2c -> read(slave << 1 | 1, buff, 7); |
Sigma884 | 0:9f2a22c6ced2 | 223 | dig_H2 = buff[0] | (buff[1] << 8); |
Sigma884 | 0:9f2a22c6ced2 | 224 | dig_H3 = buff[2]; |
Sigma884 | 0:9f2a22c6ced2 | 225 | dig_H4 = (buff[3] << 4) | (buff[4] & 0x0F); |
Sigma884 | 0:9f2a22c6ced2 | 226 | dig_H5 = ((buff[4] >> 4) & 0x0F) | (buff[5] << 4); |
Sigma884 | 0:9f2a22c6ced2 | 227 | dig_H6 = buff[6]; |
Sigma884 | 0:9f2a22c6ced2 | 228 | } |
Sigma884 | 0:9f2a22c6ced2 | 229 | |
Sigma884 | 0:9f2a22c6ced2 | 230 | int BME280_lib::calcT(){ |
Sigma884 | 0:9f2a22c6ced2 | 231 | T_var1 = ((((adc >> 3) - ((int)dig_T1 << 1))) * ((int)dig_T2)) >> 11; |
Sigma884 | 0:9f2a22c6ced2 | 232 | T_var2 = (((((adc >> 4) - ((int)dig_T1)) * ((adc >> 4) - ((int)dig_T1))) >> 12) * ((int)dig_T3)) >> 14; |
Sigma884 | 0:9f2a22c6ced2 | 233 | t_fine = T_var1 + T_var2; |
Sigma884 | 0:9f2a22c6ced2 | 234 | T = (t_fine * 5 + 128) >> 8; |
Sigma884 | 0:9f2a22c6ced2 | 235 | return T; |
Sigma884 | 0:9f2a22c6ced2 | 236 | } |
Sigma884 | 0:9f2a22c6ced2 | 237 | |
Sigma884 | 0:9f2a22c6ced2 | 238 | unsigned int BME280_lib::calcP(){ |
Sigma884 | 0:9f2a22c6ced2 | 239 | P_var1 = ((long long)t_fine) - 128000; |
Sigma884 | 0:9f2a22c6ced2 | 240 | P_var2 = P_var1 * P_var1 * (long long)dig_P6; |
Sigma884 | 0:9f2a22c6ced2 | 241 | P_var2 = P_var2 + ((P_var1 * (long long)dig_P5) << 17); |
Sigma884 | 0:9f2a22c6ced2 | 242 | P_var2 = P_var2 + (((long long)dig_P4) << 35); |
Sigma884 | 0:9f2a22c6ced2 | 243 | P_var1 = ((P_var1 * P_var1 * (long long)dig_P3) >> 8) + ((P_var1 * (long long)dig_P2) << 12); |
Sigma884 | 0:9f2a22c6ced2 | 244 | P_var1 = (((((long long)1) << 47) + P_var1)) * ((long long)dig_P1) >> 33; |
Sigma884 | 0:9f2a22c6ced2 | 245 | if(P_var1 == 0){ |
Sigma884 | 0:9f2a22c6ced2 | 246 | return 0; |
Sigma884 | 0:9f2a22c6ced2 | 247 | } |
Sigma884 | 0:9f2a22c6ced2 | 248 | P = 1048576 - adc; |
Sigma884 | 0:9f2a22c6ced2 | 249 | P = (((P << 31) - P_var2) * 3125) / P_var1; |
Sigma884 | 0:9f2a22c6ced2 | 250 | P_var1 = (((long long)dig_P9) * (P >> 13) * (P >> 13)) >> 25; |
Sigma884 | 0:9f2a22c6ced2 | 251 | P_var2 = (((long long)dig_P8) * P) >> 19; |
Sigma884 | 0:9f2a22c6ced2 | 252 | P = ((P + P_var1 + P_var2) >> 8) + (((long long)dig_P7) << 4); |
Sigma884 | 0:9f2a22c6ced2 | 253 | return (unsigned int)P; |
Sigma884 | 0:9f2a22c6ced2 | 254 | } |
Sigma884 | 0:9f2a22c6ced2 | 255 | |
Sigma884 | 0:9f2a22c6ced2 | 256 | unsigned int BME280_lib::calcH(){ |
Sigma884 | 0:9f2a22c6ced2 | 257 | v_x1 = (t_fine - ((int)76800)); |
Sigma884 | 0:9f2a22c6ced2 | 258 | v_x1 = (((((adc << 14) - (((int)dig_H4) << 20) - (((int)dig_H5) * v_x1)) + |
Sigma884 | 0:9f2a22c6ced2 | 259 | ((int)16384)) >> 15) * (((((((v_x1 * ((int)dig_H6)) >> 10) * |
Sigma884 | 0:9f2a22c6ced2 | 260 | (((v_x1 * ((int)dig_H3)) >> 11) + ((int)32768))) >> 10) + |
Sigma884 | 0:9f2a22c6ced2 | 261 | ((int)2097152)) * ((int)dig_H2) + 8192) >> 14)); |
Sigma884 | 0:9f2a22c6ced2 | 262 | v_x1 = (v_x1 - (((((v_x1 >> 15) * (v_x1 >> 15)) >> 7) * ((int)dig_H1)) >> 4)); |
Sigma884 | 0:9f2a22c6ced2 | 263 | v_x1 = (v_x1 < 0 ? 0 : v_x1); |
Sigma884 | 0:9f2a22c6ced2 | 264 | v_x1 = (v_x1 > 419430400 ? 419430400 : v_x1); |
Sigma884 | 0:9f2a22c6ced2 | 265 | return (unsigned int)(v_x1 >> 12); |
Sigma884 | 0:9f2a22c6ced2 | 266 | } |