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49 /*! @file bme280_defs.h
50 @brief Sensor driver for BME280 sensor */
52 * @defgroup BME280 SENSOR API
55 #ifndef BME280_DEFS_H_
56 #define BME280_DEFS_H_
58 /********************************************************/
61 #include <linux/types.h>
62 #include <linux/kernel.h>
68 /********************************************************/
69 /*! @name Common macros */
70 /********************************************************/
72 #if !defined(UINT8_C) && !defined(INT8_C)
73 #define INT8_C(x) S8_C(x)
74 #define UINT8_C(x) U8_C(x)
77 #if !defined(UINT16_C) && !defined(INT16_C)
78 #define INT16_C(x) S16_C(x)
79 #define UINT16_C(x) U16_C(x)
82 #if !defined(INT32_C) && !defined(UINT32_C)
83 #define INT32_C(x) S32_C(x)
84 #define UINT32_C(x) U32_C(x)
87 #if !defined(INT64_C) && !defined(UINT64_C)
88 #define INT64_C(x) S64_C(x)
89 #define UINT64_C(x) U64_C(x)
94 /**\name C standard macros */
99 #define NULL ((void *) 0)
102 /********************************************************/
104 #ifndef BME280_FLOAT_ENABLE
105 /* #define BME280_FLOAT_ENABLE */
108 #ifndef BME280_FLOAT_ENABLE
109 #ifndef BME280_64BIT_ENABLE
110 #define BME280_64BIT_ENABLE
115 #define TRUE UINT8_C(1)
118 #define FALSE UINT8_C(0)
121 /**\name I2C addresses */
122 #define BME280_I2C_ADDR_PRIM UINT8_C(0x76)
123 #define BME280_I2C_ADDR_SEC UINT8_C(0x77)
125 /**\name BME280 chip identifier */
126 #define BME280_CHIP_ID UINT8_C(0x60)
128 /**\name Register Address */
129 #define BME280_CHIP_ID_ADDR UINT8_C(0xD0)
130 #define BME280_RESET_ADDR UINT8_C(0xE0)
131 #define BME280_TEMP_PRESS_CALIB_DATA_ADDR UINT8_C(0x88)
132 #define BME280_HUMIDITY_CALIB_DATA_ADDR UINT8_C(0xE1)
133 #define BME280_PWR_CTRL_ADDR UINT8_C(0xF4)
134 #define BME280_CTRL_HUM_ADDR UINT8_C(0xF2)
135 #define BME280_CTRL_MEAS_ADDR UINT8_C(0xF4)
136 #define BME280_CONFIG_ADDR UINT8_C(0xF5)
137 #define BME280_DATA_ADDR UINT8_C(0xF7)
139 /**\name API success code */
140 #define BME280_OK INT8_C(0)
142 /**\name API error codes */
143 #define BME280_E_NULL_PTR INT8_C(-1)
144 #define BME280_E_DEV_NOT_FOUND INT8_C(-2)
145 #define BME280_E_INVALID_LEN INT8_C(-3)
146 #define BME280_E_COMM_FAIL INT8_C(-4)
147 #define BME280_E_SLEEP_MODE_FAIL INT8_C(-5)
149 /**\name API warning codes */
150 #define BME280_W_INVALID_OSR_MACRO INT8_C(1)
152 /**\name Macros related to size */
153 #define BME280_TEMP_PRESS_CALIB_DATA_LEN UINT8_C(26)
154 #define BME280_HUMIDITY_CALIB_DATA_LEN UINT8_C(7)
155 #define BME280_P_T_H_DATA_LEN UINT8_C(8)
157 /**\name Sensor power modes */
158 #define BME280_SLEEP_MODE UINT8_C(0x00)
159 #define BME280_FORCED_MODE UINT8_C(0x01)
160 #define BME280_NORMAL_MODE UINT8_C(0x03)
162 /**\name Macro to combine two 8 bit data's to form a 16 bit data */
163 #define BME280_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
165 #define BME280_SET_BITS(reg_data, bitname, data) \
166 ((reg_data & ~(bitname##_MSK)) | \
167 ((data << bitname##_POS) & bitname##_MSK))
168 #define BME280_SET_BITS_POS_0(reg_data, bitname, data) \
169 ((reg_data & ~(bitname##_MSK)) | \
170 (data & bitname##_MSK))
172 #define BME280_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
174 #define BME280_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
176 /**\name Macros for bit masking */
177 #define BME280_SENSOR_MODE_MSK UINT8_C(0x03)
178 #define BME280_SENSOR_MODE_POS UINT8_C(0x00)
180 #define BME280_CTRL_HUM_MSK UINT8_C(0x07)
181 #define BME280_CTRL_HUM_POS UINT8_C(0x00)
183 #define BME280_CTRL_PRESS_MSK UINT8_C(0x1C)
184 #define BME280_CTRL_PRESS_POS UINT8_C(0x02)
186 #define BME280_CTRL_TEMP_MSK UINT8_C(0xE0)
187 #define BME280_CTRL_TEMP_POS UINT8_C(0x05)
189 #define BME280_FILTER_MSK UINT8_C(0x1C)
190 #define BME280_FILTER_POS UINT8_C(0x02)
192 #define BME280_STANDBY_MSK UINT8_C(0xE0)
193 #define BME280_STANDBY_POS UINT8_C(0x05)
195 /**\name Sensor component selection macros
196 These values are internal for API implementation. Don't relate this to
198 #define BME280_PRESS UINT8_C(1)
199 #define BME280_TEMP UINT8_C(1 << 1)
200 #define BME280_HUM UINT8_C(1 << 2)
201 #define BME280_ALL UINT8_C(0x07)
203 /**\name Settings selection macros */
204 #define BME280_OSR_PRESS_SEL UINT8_C(1)
205 #define BME280_OSR_TEMP_SEL UINT8_C(1 << 1)
206 #define BME280_OSR_HUM_SEL UINT8_C(1 << 2)
207 #define BME280_FILTER_SEL UINT8_C(1 << 3)
208 #define BME280_STANDBY_SEL UINT8_C(1 << 4)
209 #define BME280_ALL_SETTINGS_SEL UINT8_C(0x1F)
211 /**\name Oversampling macros */
212 #define BME280_NO_OVERSAMPLING UINT8_C(0x00)
213 #define BME280_OVERSAMPLING_1X UINT8_C(0x01)
214 #define BME280_OVERSAMPLING_2X UINT8_C(0x02)
215 #define BME280_OVERSAMPLING_4X UINT8_C(0x03)
216 #define BME280_OVERSAMPLING_8X UINT8_C(0x04)
217 #define BME280_OVERSAMPLING_16X UINT8_C(0x05)
219 /**\name Standby duration selection macros */
220 #define BME280_STANDBY_TIME_1_MS (0x00)
221 #define BME280_STANDBY_TIME_62_5_MS (0x01)
222 #define BME280_STANDBY_TIME_125_MS (0x02)
223 #define BME280_STANDBY_TIME_250_MS (0x03)
224 #define BME280_STANDBY_TIME_500_MS (0x04)
225 #define BME280_STANDBY_TIME_1000_MS (0x05)
226 #define BME280_STANDBY_TIME_10_MS (0x06)
227 #define BME280_STANDBY_TIME_20_MS (0x07)
229 /**\name Filter coefficient selection macros */
230 #define BME280_FILTER_COEFF_OFF (0x00)
231 #define BME280_FILTER_COEFF_2 (0x01)
232 #define BME280_FILTER_COEFF_4 (0x02)
233 #define BME280_FILTER_COEFF_8 (0x03)
234 #define BME280_FILTER_COEFF_16 (0x04)
237 * @brief Interface selection Enums
247 * @brief Type definitions
249 typedef int8_t (*bme280_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr,
250 uint8_t *data, uint16_t len);
252 typedef void (*bme280_delay_fptr_t)(uint32_t period);
255 * @brief Calibration data
257 struct bme280_calib_data {
285 * @brief bme280 sensor structure which comprises of temperature, pressure and
288 #ifdef BME280_FLOAT_ENABLE
290 /*! Compensated pressure */
292 /*! Compensated temperature */
294 /*! Compensated humidity */
299 /*! Compensated pressure */
301 /*! Compensated temperature */
303 /*! Compensated humidity */
306 #endif /* BME280_USE_FLOATING_POINT */
309 * @brief bme280 sensor structure which comprises of uncompensated temperature,
310 * pressure and humidity data
312 struct bme280_uncomp_data {
313 /*! un-compensated pressure */
315 /*! un-compensated temperature */
316 uint32_t temperature;
317 /*! un-compensated humidity */
322 * @brief bme280 sensor settings structure which comprises of mode,
323 * oversampling and filter settings.
325 struct bme280_settings {
326 /*! pressure oversampling */
328 /*! temperature oversampling */
330 /*! humidity oversampling */
332 /*! filter coefficient */
335 uint8_t standby_time;
339 * @brief bme280 device structure
346 /*! SPI/I2C interface */
347 enum bme280_intf intf;
348 /*! Read function pointer */
349 bme280_com_fptr_t read;
350 /*! Write function pointer */
351 bme280_com_fptr_t write;
352 /*! Delay function pointer */
353 bme280_delay_fptr_t delay_ms;
355 struct bme280_calib_data calib_data;
356 /*! Sensor settings */
357 struct bme280_settings settings;
360 #endif /* BME280_DEFS_H_ */