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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>
68 #if (LONG_MAX) > 0x7fffffff
69 #define __have_long64 1
70 #elif (LONG_MAX) == 0x7fffffff
71 #define __have_long32 1
79 #define UINT8_C(x) x##U
83 #if !defined(UINT16_C)
85 #if (INT_MAX) > 0x7fff
88 #define UINT16_C(x) x##U
92 #if !defined(INT32_C) && !defined(UINT32_C)
94 #define INT32_C(x) x##L
95 #define UINT32_C(x) x##UL
98 #define UINT32_C(x) x##U
102 #if !defined(INT64_C) && !defined(UINT64_C)
104 #define INT64_C(x) x##L
105 #define UINT64_C(x) x##UL
107 #define INT64_C(x) x##LL
108 #define UINT64_C(x) x##ULL
114 /**\name C standard macros */
119 #define NULL ((void *) 0)
123 /* #define FLOATING_POINT_REPRESENTATION */
124 #define MACHINE_64_BIT
127 #define TRUE UINT8_C(1)
130 #define FALSE UINT8_C(0)
133 /**\name I2C addresses */
134 #define BME280_I2C_ADDR_PRIM UINT8_C(0x76)
135 #define BME280_I2C_ADDR_SEC UINT8_C(0x77)
137 /**\name BME280 chip identifier */
138 #define BME280_CHIP_ID UINT8_C(0x60)
140 /**\name Register Address */
141 #define BME280_CHIP_ID_ADDR UINT8_C(0xD0)
142 #define BME280_RESET_ADDR UINT8_C(0xE0)
143 #define BME280_TEMP_PRESS_CALIB_DATA_ADDR UINT8_C(0x88)
144 #define BME280_HUMIDITY_CALIB_DATA_ADDR UINT8_C(0xE1)
145 #define BME280_PWR_CTRL_ADDR UINT8_C(0xF4)
146 #define BME280_CTRL_HUM_ADDR UINT8_C(0xF2)
147 #define BME280_CTRL_MEAS_ADDR UINT8_C(0xF4)
148 #define BME280_CONFIG_ADDR UINT8_C(0xF5)
149 #define BME280_DATA_ADDR UINT8_C(0xF7)
151 /**\name API success code */
152 #define BME280_OK INT8_C(0)
153 /**\name API error codes */
154 #define BME280_E_NULL_PTR INT8_C(-1)
155 #define BME280_E_DEV_NOT_FOUND INT8_C(-2)
156 #define BME280_E_INVALID_LEN INT8_C(-3)
157 #define BME280_E_COMM_FAIL INT8_C(-4)
158 #define BME280_E_SLEEP_MODE_FAIL INT8_C(-5)
159 /**\name API warning codes */
160 #define BME280_W_INVALID_OSR_MACRO UINT8_C(1)
162 /**\name Macros related to size */
163 #define BME280_TEMP_PRESS_CALIB_DATA_LEN UINT8_C(26)
164 #define BME280_HUMIDITY_CALIB_DATA_LEN UINT8_C(7)
165 #define BME280_P_T_H_DATA_LEN UINT8_C(8)
167 /**\name Sensor power modes */
168 #define BME280_SLEEP_MODE UINT8_C(0x00)
169 #define BME280_FORCED_MODE UINT8_C(0x01)
170 #define BME280_NORMAL_MODE UINT8_C(0x03)
172 /**\name Macro to combine two 8 bit data's to form a 16 bit data */
173 #define BME280_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
175 #define BME280_SET_BITS(reg_data, bitname, data) \
176 ((reg_data & ~(bitname##_MSK)) | \
177 ((data << bitname##_POS) & bitname##_MSK))
178 #define BME280_SET_BITS_POS_0(reg_data, bitname, data) \
179 ((reg_data & ~(bitname##_MSK)) | \
180 (data & bitname##_MSK))
182 #define BME280_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
184 #define BME280_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
186 /**\name Macros for bit masking */
187 #define BME280_SENSOR_MODE_MSK UINT8_C(0x03)
188 #define BME280_SENSOR_MODE_POS UINT8_C(0x00)
190 #define BME280_CTRL_HUM_MSK UINT8_C(0x07)
191 #define BME280_CTRL_HUM_POS UINT8_C(0x00)
193 #define BME280_CTRL_PRESS_MSK UINT8_C(0x1C)
194 #define BME280_CTRL_PRESS_POS UINT8_C(0x02)
196 #define BME280_CTRL_TEMP_MSK UINT8_C(0xE0)
197 #define BME280_CTRL_TEMP_POS UINT8_C(0x05)
199 #define BME280_FILTER_MSK UINT8_C(0x1C)
200 #define BME280_FILTER_POS UINT8_C(0x02)
202 #define BME280_STANDBY_MSK UINT8_C(0xE0)
203 #define BME280_STANDBY_POS UINT8_C(0x05)
205 /**\name Sensor component selection macros
206 These values are internal for API implementation. Don't relate this to
208 #define BME280_PRESS UINT8_C(1)
209 #define BME280_TEMP UINT8_C(1 << 1)
210 #define BME280_HUM UINT8_C(1 << 2)
211 #define BME280_ALL UINT8_C(0x07)
213 /**\name Settings selection macros */
214 #define BME280_OSR_PRESS_SEL UINT8_C(1)
215 #define BME280_OSR_TEMP_SEL UINT8_C(1 << 1)
216 #define BME280_OSR_HUM_SEL UINT8_C(1 << 2)
217 #define BME280_FILTER_SEL UINT8_C(1 << 3)
218 #define BME280_STANDBY_SEL UINT8_C(1 << 4)
219 #define BME280_ALL_SETTINGS_SEL UINT8_C(0x1F)
221 /**\name Oversampling macros */
222 #define BME280_NO_OVERSAMPLING UINT8_C(0x00)
223 #define BME280_OVERSAMPLING_1X UINT8_C(0x01)
224 #define BME280_OVERSAMPLING_2X UINT8_C(0x02)
225 #define BME280_OVERSAMPLING_4X UINT8_C(0x03)
226 #define BME280_OVERSAMPLING_8X UINT8_C(0x04)
227 #define BME280_OVERSAMPLING_16X UINT8_C(0x05)
229 /**\name Standby duration selection macros */
230 #define BME280_STANDBY_TIME_1_MS (0x00)
231 #define BME280_STANDBY_TIME_62_5_MS (0x01)
232 #define BME280_STANDBY_TIME_125_MS (0x02)
233 #define BME280_STANDBY_TIME_250_MS (0x03)
234 #define BME280_STANDBY_TIME_500_MS (0x04)
235 #define BME280_STANDBY_TIME_1000_MS (0x05)
236 #define BME280_STANDBY_TIME_10_MS (0x06)
237 #define BME280_STANDBY_TIME_20_MS (0x07)
239 /**\name Filter coefficient selection macros */
240 #define BME280_FILTER_COEFF_OFF (0x00)
241 #define BME280_FILTER_COEFF_2 (0x01)
242 #define BME280_FILTER_COEFF_4 (0x02)
243 #define BME280_FILTER_COEFF_8 (0x03)
244 #define BME280_FILTER_COEFF_16 (0x04)
247 * @brief Interface selection Enums
257 * @brief Type definitions
259 typedef int8_t (*bme280_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr,
260 uint8_t *data, uint16_t len);
262 typedef void (*bme280_delay_fptr_t)(uint32_t period);
265 * @brief Calibration data
267 struct bme280_calib_data {
295 * @brief bme280 sensor structure which comprises of temperature, pressure and
298 #ifdef FLOATING_POINT_REPRESENTATION
300 /*! Compensated pressure */
302 /*! Compensated temperature */
304 /*! Compensated humidity */
309 /*! Compensated pressure */
311 /*! Compensated temperature */
313 /*! Compensated humidity */
316 #endif /* BME280_USE_FLOATING_POINT */
319 * @brief bme280 sensor structure which comprises of uncompensated temperature,
320 * pressure and humidity data
322 struct bme280_uncomp_data {
323 /*! un-compensated pressure */
325 /*! un-compensated temperature */
326 uint32_t temperature;
327 /*! un-compensated humidity */
332 * @brief bme280 sensor settings structure which comprises of mode,
333 * oversampling and filter settings.
335 struct bme280_settings {
336 /*! pressure oversampling */
338 /*! temperature oversampling */
340 /*! humidity oversampling */
342 /*! filter coefficient */
345 uint8_t standby_time;
349 * @brief bme280 device structure
356 /*! SPI/I2C interface */
357 enum bme280_intf interface;
358 /*! Read function pointer */
359 bme280_com_fptr_t read;
360 /*! Write function pointer */
361 bme280_com_fptr_t write;
362 /*! Delay function pointer */
363 bme280_delay_fptr_t delay_ms;
365 struct bme280_calib_data calib_data;
366 /*! Sensor settings */
367 struct bme280_settings settings;
370 #endif /* BME280_DEFS_H_ */