1 /* 2 * Copyright (c) 2006-2023, RT-Thread Development Team 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 * 6 * Change Logs: 7 * Date Author Notes 8 * 2019-01-31 flybreak first version 9 * 2022-12-17 Meco Man re-implement sensor framework 10 */ 11 12 #ifndef __SENSOR_H__ 13 #define __SENSOR_H__ 14 15 #include <rtthread.h> 16 #include "dev_pin.h" 17 18 #ifdef __cplusplus 19 extern "C" { 20 #endif 21 22 #ifdef RT_USING_RTC 23 #define rt_sensor_get_ts() time(RT_NULL) /* API for the sensor to get the timestamp */ 24 #else 25 #define rt_sensor_get_ts() rt_tick_get() /* API for the sensor to get the timestamp */ 26 #endif 27 28 #define RT_DEVICE_FLAG_FIFO_RX 0x200 /* Flag to use when the sensor is open by fifo mode */ 29 30 #define RT_SENSOR_MODULE_MAX (3) /* The maximum number of members of a sensor module */ 31 32 #define RT_SENSOR_MACRO_GET_NAME(macro) (macro##_STR) 33 34 /* Sensor types */ 35 #define RT_SENSOR_TYPE_NONE (0) 36 #define RT_SENSOR_TYPE_NONE_STR "None" 37 #define RT_SENSOR_TYPE_ACCE (1) 38 #define RT_SENSOR_TYPE_ACCE_STR "Accelerometer" 39 #define RT_SENSOR_TYPE_GYRO (2) 40 #define RT_SENSOR_TYPE_GYRO_STR "Gyroscope" 41 #define RT_SENSOR_TYPE_MAG (3) 42 #define RT_SENSOR_TYPE_MAG_STR "Magnetometer" 43 #define RT_SENSOR_TYPE_TEMP (4) 44 #define RT_SENSOR_TYPE_TEMP_STR "Temperature" 45 #define RT_SENSOR_TYPE_HUMI (5) 46 #define RT_SENSOR_TYPE_HUMI_STR "Relative Humidity" 47 #define RT_SENSOR_TYPE_BARO (6) 48 #define RT_SENSOR_TYPE_BARO_STR "Barometer" 49 #define RT_SENSOR_TYPE_LIGHT (7) 50 #define RT_SENSOR_TYPE_LIGHT_STR "Ambient Light" 51 #define RT_SENSOR_TYPE_PROXIMITY (8) 52 #define RT_SENSOR_TYPE_PROXIMITY_STR "Proximity" 53 #define RT_SENSOR_TYPE_HR (9) 54 #define RT_SENSOR_TYPE_HR_STR "Heart Rate" 55 #define RT_SENSOR_TYPE_TVOC (10) 56 #define RT_SENSOR_TYPE_TVOC_STR "TVOC Level" 57 #define RT_SENSOR_TYPE_NOISE (11) 58 #define RT_SENSOR_TYPE_NOISE_STR "Noise Loudness" 59 #define RT_SENSOR_TYPE_STEP (12) 60 #define RT_SENSOR_TYPE_STEP_STR "Step" 61 #define RT_SENSOR_TYPE_FORCE (13) 62 #define RT_SENSOR_TYPE_FORCE_STR "Force" 63 #define RT_SENSOR_TYPE_DUST (14) 64 #define RT_SENSOR_TYPE_DUST_STR "Dust" 65 #define RT_SENSOR_TYPE_ECO2 (15) 66 #define RT_SENSOR_TYPE_ECO2_STR "eCO2" 67 #define RT_SENSOR_TYPE_GNSS (16) 68 #define RT_SENSOR_TYPE_GNSS_STR "GNSS" 69 #define RT_SENSOR_TYPE_TOF (17) 70 #define RT_SENSOR_TYPE_TOF_STR "ToF" 71 #define RT_SENSOR_TYPE_SPO2 (18) 72 #define RT_SENSOR_TYPE_SPO2_STR "SpO2" 73 #define RT_SENSOR_TYPE_IAQ (19) 74 #define RT_SENSOR_TYPE_IAQ_STR "IAQ" 75 #define RT_SENSOR_TYPE_ETOH (20) 76 #define RT_SENSOR_TYPE_ETOH_STR "EtOH" 77 #define RT_SENSOR_TYPE_BP (21) 78 #define RT_SENSOR_TYPE_BP_STR "Blood Pressure" 79 #define RT_SENSOR_TYPE_VOLTAGE (22) 80 #define RT_SENSOR_TYPE_VOLTAGE_STR "Voltage" 81 #define RT_SENSOR_TYPE_CURRENT (23) 82 #define RT_SENSOR_TYPE_CURRENT_STR "Current" 83 84 /* Sensor vendor types */ 85 #define RT_SENSOR_VENDOR_UNKNOWN (0) 86 #define RT_SENSOR_VENDOR_UNKNOWN_STR "Unknown" 87 #define RT_SENSOR_VENDOR_VIRTUAL (1) 88 #define RT_SENSOR_VENDOR_VIRTUAL_STR "Virtual Sensor" 89 #define RT_SENSOR_VENDOR_ONCHIP (2) 90 #define RT_SENSOR_VENDOR_ONCHIP_STR "OnChip" 91 #define RT_SENSOR_VENDOR_STM (3) 92 #define RT_SENSOR_VENDOR_STM_STR "STMicroelectronics" 93 #define RT_SENSOR_VENDOR_BOSCH (4) 94 #define RT_SENSOR_VENDOR_BOSCH_STR "Bosch" 95 #define RT_SENSOR_VENDOR_INVENSENSE (5) 96 #define RT_SENSOR_VENDOR_INVENSENSE_STR "Invensense" 97 #define RT_SENSOR_VENDOR_SEMTECH (6) 98 #define RT_SENSOR_VENDOR_SEMTECH_STR "Semtech" 99 #define RT_SENSOR_VENDOR_GOERTEK (7) 100 #define RT_SENSOR_VENDOR_GOERTEK_STR "Goertek" 101 #define RT_SENSOR_VENDOR_MIRAMEMS (8) 102 #define RT_SENSOR_VENDOR_MIRAMEMS_STR "MiraMEMS" 103 #define RT_SENSOR_VENDOR_DALLAS (9) 104 #define RT_SENSOR_VENDOR_DALLAS_STR "Dallas" 105 #define RT_SENSOR_VENDOR_ASAIR (10) 106 #define RT_SENSOR_VENDOR_ASAIR_STR "Aosong" 107 #define RT_SENSOR_VENDOR_SHARP (11) 108 #define RT_SENSOR_VENDOR_SHARP_STR "Sharp" 109 #define RT_SENSOR_VENDOR_SENSIRION (12) 110 #define RT_SENSOR_VENDOR_SENSIRION_STR "Sensirion" 111 #define RT_SENSOR_VENDOR_TI (13) 112 #define RT_SENSOR_VENDOR_TI_STR "Texas Instruments" 113 #define RT_SENSOR_VENDOR_PLANTOWER (14) 114 #define RT_SENSOR_VENDOR_PLANTOWER_STR "Plantower" 115 #define RT_SENSOR_VENDOR_AMS (15) 116 #define RT_SENSOR_VENDOR_AMS_STR "ams-OSRAM AG" 117 #define RT_SENSOR_VENDOR_MAXIM (16) 118 #define RT_SENSOR_VENDOR_MAXIM_STR "Maxim Integrated" 119 #define RT_SENSOR_VENDOR_MELEXIS (17) 120 #define RT_SENSOR_VENDOR_MELEXIS_STR "Melexis" 121 #define RT_SENSOR_VENDOR_LSC (18) 122 #define RT_SENSOR_VENDOR_LSC_STR "Lite On" 123 124 /* Sensor unit types */ 125 #define RT_SENSOR_UNIT_NONE (0) /* Dimensionless quantity */ 126 #define RT_SENSOR_UNIT_NONE_STR "" 127 #define RT_SENSOR_UNIT_MG (1) /* Accelerometer unit: mG */ 128 #define RT_SENSOR_UNIT_MG_STR "mG" 129 #define RT_SENSOR_UNIT_MDPS (2) /* Gyroscope unit: mdps */ 130 #define RT_SENSOR_UNIT_MDPS_STR "mdps" 131 #define RT_SENSOR_UNIT_MGAUSS (3) /* Magnetometer unit: mGauss */ 132 #define RT_SENSOR_UNIT_MGAUSS_STR "mGauss" 133 #define RT_SENSOR_UNIT_LUX (4) /* Ambient light unit: lux */ 134 #define RT_SENSOR_UNIT_LUX_STR "lux" 135 #define RT_SENSOR_UNIT_M (5) /* Distance unit: m */ 136 #define RT_SENSOR_UNIT_M_STR "m" 137 #define RT_SENSOR_UNIT_CM (6) /* Distance unit: cm */ 138 #define RT_SENSOR_UNIT_CM_STR "cm" 139 #define RT_SENSOR_UNIT_MM (7) /* Distance unit: mm */ 140 #define RT_SENSOR_UNIT_MM_STR "mm" 141 #define RT_SENSOR_UNIT_PA (8) /* Barometer unit: Pa */ 142 #define RT_SENSOR_UNIT_PA_STR "Pa" 143 #define RT_SENSOR_UNIT_MMHG (9) /* Blood Pressure unit: mmHg */ 144 #define RT_SENSOR_UNIT_MMHG_STR "mmHg" 145 #define RT_SENSOR_UNIT_PERCENTAGE (10) /* Relative Humidity unit: percentage */ 146 #define RT_SENSOR_UNIT_PERCENTAGE_STR "%" 147 #define RT_SENSOR_UNIT_PERMILLAGE (11) /* Relative Humidity unit: permillage */ 148 #define RT_SENSOR_UNIT_PERMILLAGE_STR "‰" 149 #define RT_SENSOR_UNIT_CELSIUS (12) /* Temperature unit: Celsius ℃ */ 150 #define RT_SENSOR_UNIT_CELSIUS_STR "℃" 151 #define RT_SENSOR_UNIT_FAHRENHEIT (13) /* Temperature unit: Fahrenheit ℉ */ 152 #define RT_SENSOR_UNIT_FAHRENHEIT_STR "℉" 153 #define RT_SENSOR_UNIT_KELVIN (14) /* Temperature unit: Kelvin K */ 154 #define RT_SENSOR_UNIT_KELVIN_STR "K" 155 #define RT_SENSOR_UNIT_HZ (15) /* Frequency unit: Hz */ 156 #define RT_SENSOR_UNIT_HZ_STR "Hz" 157 #define RT_SENSOR_UNIT_V (16) /* Voltage unit: V */ 158 #define RT_SENSOR_UNIT_V_STR "V" 159 #define RT_SENSOR_UNIT_MV (17) /* Voltage unit: mV */ 160 #define RT_SENSOR_UNIT_MV_STR "mV" 161 #define RT_SENSOR_UNIT_A (18) /* Current unit: A */ 162 #define RT_SENSOR_UNIT_A_STR "A" 163 #define RT_SENSOR_UNIT_MA (19) /* Current unit: mA */ 164 #define RT_SENSOR_UNIT_MA_STR "mA" 165 #define RT_SENSOR_UNIT_N (20) /* Force unit: N */ 166 #define RT_SENSOR_UNIT_N_STR "N" 167 #define RT_SENSOR_UNIT_MN (21) /* Force unit: mN */ 168 #define RT_SENSOR_UNIT_MN_STR "mN" 169 #define RT_SENSOR_UNIT_BPM (22) /* Heart rate unit: bpm */ 170 #define RT_SENSOR_UNIT_BPM_STR "bpm" 171 #define RT_SENSOR_UNIT_PPM (23) /* Concentration unit: ppm */ 172 #define RT_SENSOR_UNIT_PPM_STR "ppm" 173 #define RT_SENSOR_UNIT_PPB (24) /* Concentration unit: ppb */ 174 #define RT_SENSOR_UNIT_PPB_STR "ppb" 175 #define RT_SENSOR_UNIT_DMS (25) /* Coordinates unit: DMS */ 176 #define RT_SENSOR_UNIT_DMS_STR "DMS" 177 #define RT_SENSOR_UNIT_DD (26) /* Coordinates unit: DD */ 178 #define RT_SENSOR_UNIT_DD_STR "DD" 179 #define RT_SENSOR_UNIT_MGM3 (27) /* Concentration unit: mg/m3 */ 180 #define RT_SENSOR_UNIT_MGM3_STR "mg/m3" 181 182 /* Sensor communication interface types */ 183 #define RT_SENSOR_INTF_I2C (1 << 0) 184 #define RT_SENSOR_INTF_I2C_STR "I2C" 185 #define RT_SENSOR_INTF_SPI (1 << 1) 186 #define RT_SENSOR_INTF_SPI_STR "SPI" 187 #define RT_SENSOR_INTF_UART (1 << 2) 188 #define RT_SENSOR_INTF_UART_STR "UART" 189 #define RT_SENSOR_INTF_ONEWIRE (1 << 3) 190 #define RT_SENSOR_INTF_ONEWIRE_STR "1-Wire" 191 #define RT_SENSOR_INTF_CAN (1 << 4) 192 #define RT_SENSOR_INTF_CAN_STR "CAN" 193 #define RT_SENSOR_INTF_MODBUS (1 << 5) 194 #define RT_SENSOR_INTF_MODBUS_STR "Modbus" 195 196 /** 197 * Sensor mode 198 * rt_uint16_t mode 199 * 0000 | 0000 | 0000 | 0000 200 * unused accuracy power fetch data 201 */ 202 #define RT_SENSOR_MODE_ACCURACY_BIT_OFFSET (8) 203 #define RT_SENSOR_MODE_POWER_BIT_OFFSET (4) 204 #define RT_SENSOR_MODE_FETCH_BIT_OFFSET (0) 205 206 #define RT_SENSOR_MODE_GET_ACCURACY(mode) (rt_uint8_t)((mode >> RT_SENSOR_MODE_ACCURACY_BIT_OFFSET) & 0x0F) 207 #define RT_SENSOR_MODE_GET_POWER(mode) (rt_uint8_t)((mode >> RT_SENSOR_MODE_POWER_BIT_OFFSET) & 0x0F) 208 #define RT_SENSOR_MODE_GET_FETCH(mode) (rt_uint8_t)((mode >> RT_SENSOR_MODE_FETCH_BIT_OFFSET) & 0x0F) 209 210 #define RT_SENSOR_MODE_CLEAR_ACCURACY(mode) (mode &= ((rt_uint16_t)~((rt_uint16_t)0x0F << RT_SENSOR_MODE_ACCURACY_BIT_OFFSET))) 211 #define RT_SENSOR_MODE_CLEAR_POWER(mode) (mode &= ((rt_uint16_t)~((rt_uint16_t)0x0F << RT_SENSOR_MODE_POWER_BIT_OFFSET))) 212 #define RT_SENSOR_MODE_CLEAR_FETCH(mode) (mode &= ((rt_uint16_t)~((rt_uint16_t)0x0F << RT_SENSOR_MODE_FETCH_BIT_OFFSET))) 213 214 #define RT_SENSOR_MODE_SET_ACCURACY(mode, accuracy_mode) RT_SENSOR_MODE_CLEAR_ACCURACY(mode); (mode |= (accuracy_mode << RT_SENSOR_MODE_ACCURACY_BIT_OFFSET)) 215 #define RT_SENSOR_MODE_SET_POWER(mode, power_mode) RT_SENSOR_MODE_CLEAR_POWER(mode); (mode |= (power_mode << RT_SENSOR_MODE_POWER_BIT_OFFSET)) 216 #define RT_SENSOR_MODE_SET_FETCH(mode, fetch_mode) RT_SENSOR_MODE_CLEAR_FETCH(mode); (mode |= (fetch_mode << RT_SENSOR_MODE_FETCH_BIT_OFFSET)) 217 218 /* Sensor mode: accuracy */ 219 #define RT_SENSOR_MODE_ACCURACY_HIGHEST (0) 220 #define RT_SENSOR_MODE_ACCURACY_HIGHEST_STR "Accuracy Highest" 221 #define RT_SENSOR_MODE_ACCURACY_HIGH (1) 222 #define RT_SENSOR_MODE_ACCURACY_HIGH_STR "Accuracy High" 223 #define RT_SENSOR_MODE_ACCURACY_MEDIUM (2) 224 #define RT_SENSOR_MODE_ACCURACY_MEDIUM_STR "Accuracy Medium" 225 #define RT_SENSOR_MODE_ACCURACY_LOW (3) 226 #define RT_SENSOR_MODE_ACCURACY_LOW_STR "Accuracy Low" 227 #define RT_SENSOR_MODE_ACCURACY_LOWEST (4) 228 #define RT_SENSOR_MODE_ACCURACY_LOWEST_STR "Accuracy Lowest" 229 #define RT_SENSOR_MODE_ACCURACY_NOTRUST (5) 230 #define RT_SENSOR_MODE_ACCURACY_NOTRUST_STR "Accuracy No Trust" 231 232 /* Sensor mode: power */ 233 #define RT_SENSOR_MODE_POWER_HIGHEST (0) 234 #define RT_SENSOR_MODE_POWER_HIGHEST_STR "Power Highest" 235 #define RT_SENSOR_MODE_POWER_HIGH (1) 236 #define RT_SENSOR_MODE_POWER_HIGH_STR "Power High" 237 #define RT_SENSOR_MODE_POWER_MEDIUM (2) 238 #define RT_SENSOR_MODE_POWER_MEDIUM_STR "Power Medium" 239 #define RT_SENSOR_MODE_POWER_LOW (3) 240 #define RT_SENSOR_MODE_POWER_LOW_STR "Power Low" 241 #define RT_SENSOR_MODE_POWER_LOWEST (4) 242 #define RT_SENSOR_MODE_POWER_LOWEST_STR "Power Lowest" 243 #define RT_SENSOR_MODE_POWER_DOWN (5) 244 #define RT_SENSOR_MODE_POWER_DOWN_STR "Power Down" 245 246 /* Sensor mode: fetch data */ 247 #define RT_SENSOR_MODE_FETCH_POLLING (0) /* One shot only read a data */ 248 #define RT_SENSOR_MODE_FETCH_POLLING_STR "Polling Mode" 249 #define RT_SENSOR_MODE_FETCH_INT (1) /* TODO: One shot interrupt only read a data */ 250 #define RT_SENSOR_MODE_FETCH_INT_STR "Interrupt Mode" 251 #define RT_SENSOR_MODE_FETCH_FIFO (2) /* TODO: One shot interrupt read all fifo data */ 252 #define RT_SENSOR_MODE_FETCH_FIFO_STR "FIFO Mode" 253 254 /* Sensor control cmd types */ 255 #define RT_SENSOR_CTRL_GET_ID (RT_DEVICE_CTRL_BASE(Sensor) + 0) /* Get device id */ 256 #define RT_SENSOR_CTRL_SELF_TEST (RT_DEVICE_CTRL_BASE(Sensor) + 1) /* Take a self test */ 257 #define RT_SENSOR_CTRL_SOFT_RESET (RT_DEVICE_CTRL_BASE(Sensor) + 2) /* soft reset sensor */ 258 #define RT_SENSOR_CTRL_SET_FETCH_MODE (RT_DEVICE_CTRL_BASE(Sensor) + 3) /* set fetch data mode */ 259 #define RT_SENSOR_CTRL_SET_POWER_MODE (RT_DEVICE_CTRL_BASE(Sensor) + 4) /* set power mode */ 260 #define RT_SENSOR_CTRL_SET_ACCURACY_MODE (RT_DEVICE_CTRL_BASE(Sensor) + 5) /* set accuracy mode */ 261 262 #define RT_SENSOR_CTRL_USER_CMD_START 0x100 /* User commands should be greater than 0x100 */ 263 264 /* sensor floating data type */ 265 #ifdef RT_USING_SENSOR_DOUBLE_FLOAT 266 typedef double rt_sensor_float_t; 267 #else 268 typedef float rt_sensor_float_t; 269 #endif /* RT_USING_SENSOR_DOUBLE_FLOAT */ 270 271 struct rt_sensor_accuracy 272 { 273 rt_sensor_float_t resolution; /* resolution of sesnor measurement */ 274 rt_sensor_float_t error; /* error of sesnor measurement */ 275 }; 276 277 struct rt_sensor_scale 278 { 279 rt_sensor_float_t range_max; /* maximum range of this sensor's value. unit is 'unit' */ 280 rt_sensor_float_t range_min; /* minimum range of this sensor's value. unit is 'unit' */ 281 }; 282 283 struct rt_sensor_info 284 { 285 rt_uint8_t type; /* sensor type */ 286 rt_uint8_t vendor; /* sensors vendor */ 287 const char *name; /* name of sensor */ 288 rt_uint8_t unit; /* unit of measurement */ 289 rt_uint8_t intf_type; /* communication interface type */ 290 rt_uint16_t mode; /* sensor work mode */ 291 rt_uint8_t fifo_max; 292 rt_sensor_float_t acquire_min; /* minimum acquirement period, unit:ms. zero = not a constant rate */ 293 struct rt_sensor_accuracy accuracy; /* sensor current measure accuracy */ 294 struct rt_sensor_scale scale; /* sensor current scale range */ 295 }; 296 297 struct rt_sensor_intf 298 { 299 char *dev_name; /* The name of the communication device */ 300 rt_uint8_t type; /* Communication interface type */ 301 void *arg; /* Interface argument for the sensor. ex. i2c addr,spi cs,control I/O */ 302 }; 303 304 struct rt_sensor_config 305 { 306 struct rt_sensor_intf intf; /* sensor interface config */ 307 struct rt_device_pin_mode irq_pin; /* Interrupt pin, The purpose of this pin is to notification read data */ 308 }; 309 310 typedef struct rt_sensor_device *rt_sensor_t; 311 typedef struct rt_sensor_data *rt_sensor_data_t; 312 typedef struct rt_sensor_info *rt_sensor_info_t; 313 typedef struct rt_sensor_accuracy *rt_sensor_accuracy_t; 314 typedef struct rt_sensor_scale *rt_sensor_scale_t; 315 316 struct rt_sensor_device 317 { 318 struct rt_device parent; /* The standard device */ 319 320 struct rt_sensor_info info; /* The sensor info data */ 321 struct rt_sensor_config config; /* The sensor config data */ 322 323 rt_sensor_data_t data_buf; /* The buf of the data received */ 324 rt_size_t data_len; /* The size of the data received */ 325 326 const struct rt_sensor_ops *ops; /* The sensor ops */ 327 328 struct rt_sensor_module *module; /* The sensor module */ 329 330 rt_err_t (*irq_handle)(rt_sensor_t sensor); /* Called when an interrupt is generated, registered by the driver */ 331 }; 332 333 struct rt_sensor_module 334 { 335 rt_mutex_t lock; /* The module lock */ 336 337 rt_sensor_t sen[RT_SENSOR_MODULE_MAX]; /* The module contains a list of sensors */ 338 rt_uint8_t sen_num; /* Number of sensors contained in the module */ 339 }; 340 341 /* 3-axis Data Type */ 342 struct sensor_3_axis 343 { 344 rt_sensor_float_t x; 345 rt_sensor_float_t y; 346 rt_sensor_float_t z; 347 }; 348 349 /* Blood Pressure Data Type */ 350 struct sensor_bp 351 { 352 rt_sensor_float_t sbp; /* SBP : systolic pressure */ 353 rt_sensor_float_t dbp; /* DBP : diastolic pressure */ 354 }; 355 356 struct coordinates 357 { 358 rt_sensor_float_t longitude; 359 rt_sensor_float_t latitude; 360 }; 361 362 struct rt_sensor_data 363 { 364 rt_uint32_t timestamp; /* The timestamp when the data was received */ 365 rt_uint8_t type; /* The sensor type of the data */ 366 union 367 { 368 struct sensor_3_axis acce; /* Accelerometer. unit: mG */ 369 struct sensor_3_axis gyro; /* Gyroscope. unit: mdps */ 370 struct sensor_3_axis mag; /* Magnetometer. unit: mGauss */ 371 struct coordinates coord; /* Coordinates unit: degrees */ 372 struct sensor_bp bp; /* BloodPressure. unit: mmHg */ 373 rt_sensor_float_t temp; /* Temperature. unit: dCelsius */ 374 rt_sensor_float_t humi; /* Relative humidity. unit: permillage */ 375 rt_sensor_float_t baro; /* Pressure. unit: pascal (Pa) */ 376 rt_sensor_float_t light; /* Light. unit: lux */ 377 rt_sensor_float_t proximity; /* Distance. unit: centimeters */ 378 rt_sensor_float_t hr; /* Heart rate. unit: bpm */ 379 rt_sensor_float_t tvoc; /* TVOC. unit: permillage */ 380 rt_sensor_float_t noise; /* Noise Loudness. unit: HZ */ 381 rt_sensor_float_t step; /* Step sensor. unit: 1 */ 382 rt_sensor_float_t force; /* Force sensor. unit: mN */ 383 rt_sensor_float_t dust; /* Dust sensor. unit: ug/m3 */ 384 rt_sensor_float_t eco2; /* eCO2 sensor. unit: ppm */ 385 rt_sensor_float_t spo2; /* SpO2 sensor. unit: permillage */ 386 rt_sensor_float_t iaq; /* IAQ sensor. unit: 1 */ 387 rt_sensor_float_t etoh; /* EtOH sensor. unit: ppm */ 388 } data; 389 }; 390 391 struct rt_sensor_ops 392 { 393 rt_ssize_t (*fetch_data)(rt_sensor_t sensor, rt_sensor_data_t buf, rt_size_t len); 394 rt_err_t (*control)(rt_sensor_t sensor, int cmd, void *arg); 395 }; 396 397 int rt_hw_sensor_register(rt_sensor_t sensor, 398 const char *name, 399 rt_uint32_t flag, 400 void *data); 401 rt_sensor_t rt_sensor_device_find(const char *name); 402 403 #ifdef __cplusplus 404 } 405 #endif 406 407 #endif /* __SENSOR_H__ */ 408