头文件代码 - STM32通过I2C与BMP280通信

2.头文件：

#ifndef __BMP280_H__

#define __BMP280_H__

#define BMP280_ADDRESS 0xEC

#define BMP280_RESET_VALUE 0xB6

/*calibration parameters */

#define BMP280_DIG_T1_LSB_REG 0x88

#define BMP280_DIG_T1_MSB_REG 0x89

#define BMP280_DIG_T2_LSB_REG 0x8A

#define BMP280_DIG_T2_MSB_REG 0x8B

#define BMP280_DIG_T3_LSB_REG 0x8C

#define BMP280_DIG_T3_MSB_REG 0x8D

#define BMP280_DIG_P1_LSB_REG 0x8E

#define BMP280_DIG_P1_MSB_REG 0x8F

#define BMP280_DIG_P2_LSB_REG 0x90

#define BMP280_DIG_P2_MSB_REG 0x91

#define BMP280_DIG_P3_LSB_REG 0x92

#define BMP280_DIG_P3_MSB_REG 0x93

#define BMP280_DIG_P4_LSB_REG 0x94

#define BMP280_DIG_P4_MSB_REG 0x95

#define BMP280_DIG_P5_LSB_REG 0x96

#define BMP280_DIG_P5_MSB_REG 0x97

#define BMP280_DIG_P6_LSB_REG 0x98

#define BMP280_DIG_P6_MSB_REG 0x99

#define BMP280_DIG_P7_LSB_REG 0x9A

#define BMP280_DIG_P7_MSB_REG 0x9B

#define BMP280_DIG_P8_LSB_REG 0x9C

#define BMP280_DIG_P8_MSB_REG 0x9D

#define BMP280_DIG_P9_LSB_REG 0x9E

#define BMP280_DIG_P9_MSB_REG 0x9F

#define BMP280_CHIPID_REG 0xD0 /*Chip ID Register */

#define BMP280_RESET_REG 0xE0 /*Softreset Register */

#define BMP280_STATUS_REG 0xF3 /*Status Register */

#define BMP280_CTRLMEAS_REG 0xF4 /*Ctrl Measure Register */

#define BMP280_CONFIG_REG 0xF5 /*Configuration Register */

#define BMP280_PRESSURE_MSB_REG 0xF7 /*Pressure MSB Register */

#define BMP280_PRESSURE_LSB_REG 0xF8 /*Pressure LSB Register */

#define BMP280_PRESSURE_XLSB_REG 0xF9 /*Pressure XLSB Register */

#define BMP280_TEMPERATURE_MSB_REG 0xFA /*Temperature MSB Reg */

#define BMP280_TEMPERATURE_LSB_REG 0xFB /*Temperature LSB Reg */

#define BMP280_TEMPERATURE_XLSB_REG 0xFC /*Temperature XLSB Reg */

/* 在foreced mode下，1s的采样周期，温度和气压使用最低的精度采集并且使用最小的滤波器系数，

* 数据的采集时间大概在6ms，平均功率为3.27uA。

* */

/* 在foreced mode下，1s的采样周期， 温度和气压使用最高的精度采集并且使用最大的滤波器系数，

* 数据的采集时间大概在70ms，平均功率为30uA。

* */

typedef enum {

BMP280_T_MODE_SKIP = 0x0， /*skipped*/

BMP280_T_MODE_1， /*x1*/

BMP280_T_MODE_2， /*x2*/

BMP280_T_MODE_3， /*x4*/

BMP280_T_MODE_4， /*x8*/

BMP280_T_MODE_5 /*x16*/

} BMP280_T_OVERSAMPLING;

typedef enum {

BMP280_SLEEP_MODE = 0x0，

BMP280_FORCED_MODE，

BMP280_NORMAL_MODE

} BMP280_WORK_MODE;

typedef enum {

BMP280_P_MODE_SKIP = 0x0， /*skipped*/

BMP280_P_MODE_1， /*x1*/

BMP280_P_MODE_2， /*x2*/

BMP280_P_MODE_3， /*x4*/

BMP280_P_MODE_4， /*x8*/

BMP280_P_MODE_5 /*x16*/

} BMP280_P_OVERSAMPLING;

typedef enum {

BMP280_FILTER_OFF = 0x0， /*filter off*/

BMP280_FILTER_MODE_1， /*0.223*ODR*/

BMP280_FILTER_MODE_2， /*0.092*ODR*/

BMP280_FILTER_MODE_3， /*0.042*ODR*/

BMP280_FILTER_MODE_4 /*0.021*ODR*/

} BMP280_FILTER_COEFFICIENT;

typedef enum {

BMP280_T_SB1 = 0x0， /*0.5ms*/

BMP280_T_SB2， /*62.5ms*/

BMP280_T_SB3， /*125ms*/

BMP280_T_SB4， /*250ms*/

BMP280_T_SB5， /*500ms*/

BMP280_T_SB6， /*1000ms*/

BMP280_T_SB7， /*2000ms*/

BMP280_T_SB8， /*4000ms*/

} BMP280_T_SB;

struct bmp280 {

I2C_HandleTypeDef I2cHandle;

/* T1~P9 为补偿系数 */

uint16_t T1;

int16_t T2;

int16_t T3;

uint16_t P1;

int16_t P2;

int16_t P3;

int16_t P4;

int16_t P5;

int16_t P6;

int16_t P7;

int16_t P8;

int16_t P9;

int32_t t_fine;

uint8_t t_sb;

uint8_t mode;

uint8_t t_oversampling;

uint8_t p_oversampling;

uint8_t filter_coefficient;

};

extern struct bmp280 *bmp280_init（I2C_HandleTypeDef I2cHandle）;

extern void bmp280_reset（struct bmp280 *bmp280）;

extern void bmp280_set_standby_time（struct bmp280 *bmp280， BMP280_T_SB t_standby）;

extern void bmp280_set_work_mode（struct bmp280 *bmp280， BMP280_WORK_MODE mode）;

extern void bmp280_set_temperature_oversampling_mode（struct bmp280 *bmp280， BMP280_T_OVERSAMPLING t_osl）;

extern void bmp280_set_pressure_oversampling_mode（struct bmp280 *bmp280， BMP280_P_OVERSAMPLING p_osl）;

extern void bmp280_set_filter_mode（struct bmp280 *bmp280， BMP280_FILTER_COEFFICIENT f_coefficient）;

extern double bmp280_get_temperature（struct bmp280 *bmp280）;

extern double bmp280_get_pressure（struct bmp280 *bmp280）;

extern void bmp280_get_temperature_and_pressure（struct bmp280 *bmp280， double *temperature， double *pressure）;

extern void bmp280_forced_mode_get_temperature_and_pressure（struct bmp280 *bmp280， double *temperature， double *pressure）;

extern void bmp280_demo（I2C_HandleTypeDef I2cHandle， double *temperature， double *pressure）;

#endif

3.主函数相关代码：

uint8_t bmp280_id = 0;

uint8_t ctr_reg = 0;

uint8_t status_reg = 0;

int32_t tem = 0;

uint32_t pressure = 0;

bmp280_id = bmp280_init（&I2cHandle）;

if（bmp280_id == 0x58） {

bmp280_reset（&I2cHandle）;

ctr_reg = bmp280_read_register（&I2cHandle， 0xF4）;

printf（“ctr_reg1111===0x%x ”， ctr_reg）;

bmp280_write_register（&I2cHandle， 0xF4， 0xFF）;

bmp280_write_register（&I2cHandle， 0xF5， 0x14）;

HAL_Delay（100）;

while（1） {

ctr_reg = bmp280_read_register（&I2cHandle， 0xF4）;

printf（“ctr_reg2222===0x%x ”， ctr_reg）;

status_reg = bmp280_read_register（&I2cHandle， 0xF3）;

printf（“status == 0x%x ”， status_reg）;

tem = bmp280_get_temperature（&I2cHandle）;

pressure = bmp280_get_pressure（&I2cHandle）;

printf（“bmp280_id = 0x%x tem=%ld pressure=%ld ”， bmp280_id， tem， pressure/256）;

HAL_Delay（2000）;

}

}