174 lines
5.7 KiB
C
174 lines
5.7 KiB
C
#ifndef _BMP280_H_
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#define _BMP280_H_
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#include "typedef.h"
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#include "os/os_api.h"
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#include "system/includes.h"
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#include "media/includes.h"
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#include "asm/iic_hw.h"
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#include "asm/iic_soft.h"
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#include "asm/timer.h"
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#define TCFG_BMP280_DEV_ENABLE 1
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#define TCFG_BMP280_USER_IIC_TYPE 0
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#if TCFG_BMP280_DEV_ENABLE
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struct _bmp280_dev_platform_data {
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u8 comms; //0:IIC; 1:SPI
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u8 iic_hdl;
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u8 iic_delay; //这个延时并非影响iic的时钟频率，而是2Byte数据之间的延时
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};
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#define BMP280_I2C_ADDR 0x76 // The BMP280 I2C address
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#define BMP280_I2C_ALT_ADDR 0x77 // The BMP280 I2C alternate address
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#define BMP280_DEVICE_ID 0x58 // The BMP280 device ID
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#define BMP280_RESET_VALUE 0xB6 // The BMP280 reset code
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#define BMP280_CHIPID_REG 0xD0 /*Chip ID Register */
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#define BMP280_RESET_REG 0xE0 /*Softreset Register */
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#define BMP280_STATUS_REG 0xF3 /*Status Register */
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#define BMP280_CTRLMEAS_REG 0xF4 /*Ctrl Measure Register */
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#define BMP280_CONFIG_REG 0xF5 /*Configuration Register */
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#define BMP280_PRESSURE_MSB_REG 0xF7 /*Pressure MSB Register */
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#define BMP280_PRESSURE_LSB_REG 0xF8 /*Pressure LSB Register */
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#define BMP280_PRESSURE_XLSB_REG 0xF9 /*Pressure XLSB Register */
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#define BMP280_TEMPERATURE_MSB_REG 0xFA /*Temperature MSB Reg */
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#define BMP280_TEMPERATURE_LSB_REG 0xFB /*Temperature LSB Reg */
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#define BMP280_TEMPERATURE_XLSB_REG 0xFC /*Temperature XLSB Reg */
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//状态寄存器转换标志
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#define BMP280_MEASURING 0x01
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#define BMP280_IM_UPDATE 0x08
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/*calibration parameters */
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#define BMP280_DIG_T1_LSB_REG 0x88
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#define BMP280_DIG_T1_MSB_REG 0x89
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#define BMP280_DIG_T2_LSB_REG 0x8A
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#define BMP280_DIG_T2_MSB_REG 0x8B
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#define BMP280_DIG_T3_LSB_REG 0x8C
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#define BMP280_DIG_T3_MSB_REG 0x8D
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#define BMP280_DIG_P1_LSB_REG 0x8E
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#define BMP280_DIG_P1_MSB_REG 0x8F
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#define BMP280_DIG_P2_LSB_REG 0x90
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#define BMP280_DIG_P2_MSB_REG 0x91
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#define BMP280_DIG_P3_LSB_REG 0x92
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#define BMP280_DIG_P3_MSB_REG 0x93
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#define BMP280_DIG_P4_LSB_REG 0x94
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#define BMP280_DIG_P4_MSB_REG 0x95
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#define BMP280_DIG_P5_LSB_REG 0x96
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#define BMP280_DIG_P5_MSB_REG 0x97
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#define BMP280_DIG_P6_LSB_REG 0x98
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#define BMP280_DIG_P6_MSB_REG 0x99
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#define BMP280_DIG_P7_LSB_REG 0x9A
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#define BMP280_DIG_P7_MSB_REG 0x9B
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#define BMP280_DIG_P8_LSB_REG 0x9C
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#define BMP280_DIG_P8_MSB_REG 0x9D
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#define BMP280_DIG_P9_LSB_REG 0x9E
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#define BMP280_DIG_P9_MSB_REG 0x9F
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/******************ctrl_meas reg************************/
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//BMP工作模式 bit:1,0
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typedef enum {
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BMP280_SLEEP_MODE = 0x0,
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BMP280_FORCED_MODE = 0x1, //可以说0x2
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BMP280_NORMAL_MODE = 0x3
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} BMP280_WORK_MODE;
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//BMP压力过采样因子 bit:4,3,2
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typedef enum {
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BMP280_P_MODE_SKIP = 0x0, /*skipped*/
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BMP280_P_MODE_1, /*x1*/
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BMP280_P_MODE_2, /*x2*/
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BMP280_P_MODE_3, /*x4*/
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BMP280_P_MODE_4, /*x8*/
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BMP280_P_MODE_5 /*x16*/
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} BMP280_P_OVERSAMPLING;
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//BMP温度过采样因子 bit:7,6,5
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typedef enum {
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BMP280_T_MODE_SKIP = 0x0, /*skipped*/
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BMP280_T_MODE_1, /*x1*/
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BMP280_T_MODE_2, /*x2*/
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BMP280_T_MODE_3, /*x4*/
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BMP280_T_MODE_4, /*x8*/
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BMP280_T_MODE_5 /*x16*/
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} BMP280_T_OVERSAMPLING;
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/******************config reg************************/
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//bit0:spi3w_en: 1:enable spi 3-wire
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//IIR滤波器时间常数 bit:4,3,2
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typedef enum {
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BMP280_FILTER_OFF = 0x0, /*filter off*/
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BMP280_FILTER_MODE_1, /*0.223*ODR*/ /*x2*/
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BMP280_FILTER_MODE_2, /*0.092*ODR*/ /*x4*/
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BMP280_FILTER_MODE_3, /*0.042*ODR*/ /*x8*/
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BMP280_FILTER_MODE_4 /*0.021*ODR*/ /*x16*/
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} BMP280_FILTER_COEFFICIENT;
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//保持时间 bit:7,6,5
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typedef enum {
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BMP280_T_SB1 = 0x0, /*0.5ms*/
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BMP280_T_SB2, /*62.5ms*/
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BMP280_T_SB3, /*125ms*/
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BMP280_T_SB4, /*250ms*/
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BMP280_T_SB5, /*500ms*/
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BMP280_T_SB6, /*1000ms*/
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BMP280_T_SB7, /*2000ms*/
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BMP280_T_SB8, /*4000ms*/
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} BMP280_T_SB;
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typedef struct {
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/* T1~P9 为补偿系数 */
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u16 t1;
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s16 t2;
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s16 t3;
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u16 p1;
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s16 p2;
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s16 p3;
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s16 p4;
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s16 p5;
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s16 p6;
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s16 p7;
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s16 p8;
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s16 p9;
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} bmp280_params;
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typedef struct {
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BMP280_T_OVERSAMPLING t_osample;
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BMP280_P_OVERSAMPLING p_osample;
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BMP280_WORK_MODE workmode;
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} bmp_oversample_mode;
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typedef struct {
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BMP280_T_SB t_sb;
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BMP280_FILTER_COEFFICIENT filter_coefficient;
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u8 spi_en;
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} bmp_config;
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#define USE_FIXED_POINT_COMPENSATE 1//数据补偿算法选择:1:使用定点补偿 0:使用浮点补偿
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#if USE_FIXED_POINT_COMPENSATE //使用定点补偿
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typedef u32 bmp_pressure_data;
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typedef s32 bmp_temperature_data;
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#else //使用浮点补偿
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typedef double bmp_pressure_data;
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typedef double bmp_temperature_data;
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#endif
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bool bmp280_init(void *priv);
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bool bmp280_set_temoversamp(bmp_oversample_mode *oversample_mode);
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bool bmp280_set_standby_filter(bmp_config *bmp_config);
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void bmp280_set_work_mode(BMP280_WORK_MODE workmode);
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bool bmp280_reset(); //return 1:ok; 0:fail
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void bmp280_get_temperature_and_pressure(bmp_temperature_data *temperature, bmp_pressure_data *pressure);
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void bmp280_forced_mode_get_temperature_and_pressure(bmp_temperature_data *temperature, bmp_pressure_data *pressure);
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float bmp280_get_altitude(bmp_temperature_data temperature, bmp_pressure_data pressure);
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// void bmp280_init_read_test();
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#endif
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#endif
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