BMP280.h

00001 #ifndef BMP280_H
00002 #define BMP280_H
00003 
00004 // Register define
00005 #define BMP280_ADDR             0xEE    // BMP280 i2c address
00006 
00007 #define BMP280_REG_CALIBRATION  0x88    // calibration register start
00008 #define BMP280_REG_ID           0xD0    // read out is 0x58
00009 #define BMP280_REG_RESET        0xE0    // write value 0xB6 will process power-on-reset other value is not work
00010 #define BMP280_REG_STATUS       0xF3    // indicate status of the device
00011 #define BMP280_REG_CTRL_MEAS    0xF4    // config options of the device
00012 #define BMP280_REG_CONFIG       0xF5    // set rate, filted and interface options of device
00013 #define BMP280_REG_PRESS        0xF7    // pressure measurement out data 0xF7~0xF9
00014 #define BMP280_REG_TMEP         0xFA    // temperature measurment out data 0xFA~0xFC
00015 
00016 // OSSR Data
00017 #define BMP280_OSSR_SKIP        0x00    // Skipped output set to 0x80000
00018 #define BMP280_OSSR_OV1         0x01    // oversampling x1
00019 #define BMP280_OSSR_OV2         0x02    // oversampling x2
00020 #define BMP280_OSSR_OV4         0x03    // oversampling x4
00021 #define BMP280_OSSR_OV8         0x04    // oversampling x8
00022 #define BMP280_OSSR_OV16        0x05    // oversampling x16
00023 
00024 // wait to read out time
00025 // T_SB
00026 #define BMP280_T_SB0            0x00    // 0.5ms
00027 #define BMP280_T_SB62           0x01    // 62.5ms
00028 #define BMP280_T_SB125          0x02    // 125ms
00029 #define BMP280_T_SB250          0x03    // 250ms
00030 #define BMP280_T_SB500          0x04    // 500ms
00031 #define BMP280_T_SB1000         0x05    // 1000ms
00032 #define BMP280_T_SB2000         0x06    // 2000ms
00033 #define BMP280_T_SB4000         0x07    // 4000ms
00034 
00035 // Power Mode
00036 #define BMP280_POWER_SLEEP      0b00
00037 #define BMP280_POWER_FORCE      0b01
00038 #define BMP280_POWER_NORMAL     0b11
00039 
00040 
00041 
00042 #include "mbed.h"
00043 
00044 class BMP280 {
00045     
00046     public:
00047         BMP280(I2C& i2c);
00048         int init(char ctrl_meas  = 0x6F, char config = 0x70);
00049         int readData(float *tempC, int *pressPa);
00050         
00051     protected:
00052         I2C m_i2c;
00053         Serial pc;
00054         unsigned short dig_T1,dig_P1;
00055         short dig_T2,dig_T3,dig_P2,dig_P3,dig_P4,dig_P5,dig_P6,dig_P7,dig_P8,dig_P9;
00056         void write(char reg, char ctrl);
00057         void read(char reg, char *data, int length);
00058         
00059     private:
00060     
00061 };
00062 
00063 #endif