SPL06-001 气压计计算与读取

素颜马尾好姑娘i 2022-12-19 15:28 344阅读 0赞

**手册地址**  
[https://download.csdn.net/download/zhangxuechao\_/10548473][https_download.csdn.net_download_zhangxuechao_10548473]  
**寄存器**  
![1][]  
**计算方法**  
![1][1 1]  
**举例**

//气压测量速率(sample/sec),Background 模式使用
    #define  PM_RATE_1          (0<<4)      //1 measurements pr. sec.
    #define  PM_RATE_2          (1<<4)      //2 measurements pr. sec.
    #define  PM_RATE_4          (2<<4)      //4 measurements pr. sec.           
    #define  PM_RATE_8          (3<<4)      //8 measurements pr. sec.
    #define  PM_RATE_16         (4<<4)      //16 measurements pr. sec.
    #define  PM_RATE_32         (5<<4)      //32 measurements pr. sec.
    #define  PM_RATE_64         (6<<4)      //64 measurements pr. sec.
    #define  PM_RATE_128        (7<<4)      //128 measurements pr. sec.
    
    //气压重采样速率(times),Background 模式使用
    #define PM_PRC_1            0       //Sigle         kP=524288   ,3.6ms
    #define PM_PRC_2            1       //2 times       kP=1572864  ,5.2ms
    #define PM_PRC_4            2       //4 times       kP=3670016  ,8.4ms
    #define PM_PRC_8            3       //8 times       kP=7864320  ,14.8ms
    #define PM_PRC_16           4       //16 times      kP=253952   ,27.6ms
    #define PM_PRC_32           5       //32 times      kP=516096   ,53.2ms
    #define PM_PRC_64           6       //64 times      kP=1040384  ,104.4ms
    #define PM_PRC_128          7       //128 times     kP=2088960  ,206.8ms
    
    //温度测量速率(sample/sec),Background 模式使用
    #define  TMP_RATE_1         (0<<4)      //1 measurements pr. sec.
    #define  TMP_RATE_2         (1<<4)      //2 measurements pr. sec.
    #define  TMP_RATE_4         (2<<4)      //4 measurements pr. sec.           
    #define  TMP_RATE_8         (3<<4)      //8 measurements pr. sec.
    #define  TMP_RATE_16        (4<<4)      //16 measurements pr. sec.
    #define  TMP_RATE_32        (5<<4)      //32 measurements pr. sec.
    #define  TMP_RATE_64        (6<<4)      //64 measurements pr. sec.
    #define  TMP_RATE_128       (7<<4)      //128 measurements pr. sec.
    
    //温度重采样速率(times),Background 模式使用
    #define TMP_PRC_1           0       //Sigle
    #define TMP_PRC_2           1       //2 times
    #define TMP_PRC_4           2       //4 times
    #define TMP_PRC_8           3       //8 times
    #define TMP_PRC_16          4       //16 times
    #define TMP_PRC_32          5       //32 times
    #define TMP_PRC_64          6       //64 times
    #define TMP_PRC_128         7       //128 times
    
    //SPL06_MEAS_CFG
    #define MEAS_COEF_RDY       0x80
    #define MEAS_SENSOR_RDY     0x40        //传感器初始化完成
    #define MEAS_TMP_RDY        0x20        //有新的温度数据
    #define MEAS_PRS_RDY        0x10        //有新的气压数据
    
    #define MEAS_CTRL_Standby               0x00    //空闲模式
    #define MEAS_CTRL_PressMeasure          0x01    //单次气压测量
    #define MEAS_CTRL_TempMeasure           0x02    //单次温度测量
    #define MEAS_CTRL_ContinuousPress       0x05    //连续气压测量
    #define MEAS_CTRL_ContinuousTemp        0x06    //连续温度测量
    #define MEAS_CTRL_ContinuousPressTemp   0x07    //连续气压温度测量
    
    //FIFO_STS
    #define SPL06_FIFO_FULL     0x02
    #define SPL06_FIFO_EMPTY    0x01
    
    //INT_STS
    #define SPL06_INT_FIFO_FULL     0x04
    #define SPL06_INT_TMP           0x02
    #define SPL06_INT_PRS           0x01
    
    //CFG_REG
    #define SPL06_CFG_T_SHIFT   0x08    //oversampling times>8时必须使用
    #define SPL06_CFG_P_SHIFT   0x04
    
    #define SP06_PSR_B2     0x00        //气压值
    #define SP06_PSR_B1     0x01
    #define SP06_PSR_B0     0x02
    #define SP06_TMP_B2     0x03        //温度值
    #define SP06_TMP_B1     0x04
    #define SP06_TMP_B0     0x05
    
    #define SP06_PSR_CFG    0x06        //气压测量配置
    #define SP06_TMP_CFG    0x07        //温度测量配置
    #define SP06_MEAS_CFG   0x08        //测量模式配置
    
    #define SP06_CFG_REG    0x09
    #define SP06_INT_STS    0x0A
    #define SP06_FIFO_STS   0x0B
    
    #define SP06_RESET      0x0C
    #define SP06_ID         0x0D
    
    #define SP06_COEF       0x10        //-0x21
    #define SP06_COEF_SRCE  0x28
    
    static float _kT,_kP;
    static float _Temp,_Press;
    
    uint8_t spl06_init(void)
    {
        uint8_t coef[18];
        uint8_t id;
    
        if(spl06_write_reg(SP06_RESET,0x89))
        {
            puts("spl06 reset  fail\r\n");
            return 1;
        }
    
        id = spl06_read_reg(SP06_ID);
        if(id != 0x10)
        {
            puts("sol06 id error !!!\r\n");
        }
    
        //delay_ms(200);        //复位后系数准备好需要至少40ms
    
        spl06_read_buffer(SP06_COEF,coef,18);
        _C0 = ((int16_t)coef[0]<<4 ) + ((coef[1]&0xF0)>>4);
        _C0 = (_C0&0x0800)?(0xF000|_C0):_C0;
        _C1 = ((int16_t)(coef[1]&0x0F)<<8 ) + coef[2];
        _C1 = (_C1&0x0800)?(0xF000|_C1):_C1;
        _C00 = ((int32_t)coef[3]<<12 ) + ((uint32_t)coef[4]<<4 ) + (coef[5]>>4);
        _C10 = ((int32_t)(coef[5]&0x0F)<<16 ) + ((uint32_t)coef[6]<<8 ) + coef[7];
        _C00 = (_C00&0x080000)?(0xFFF00000|_C00):_C00;
        _C10 = (_C10&0x080000)?(0xFFF00000|_C10):_C10;
        _C01 = ((int16_t)coef[8]<<8 ) + coef[9];
        _C11 = ((int16_t)coef[10]<<8 ) + coef[11];
        _C11 = (_C11&0x0800)?(0xF000|_C11):_C11;
        _C20 = ((int16_t)coef[12]<<8 ) + coef[13];
        _C20 = (_C20&0x0800)?(0xF000|_C20):_C20;
        _C21 = ((int16_t)coef[14]<<8 ) + coef[15];
        _C21 = (_C21&0x0800)?(0xF000|_C21):_C21;
        _C30 = ((int16_t)coef[16]<<8 ) + coef[17];
        _C30 = (_C30&0x0800)?(0xF000|_C30):_C30;
    
        spl06_config_pressure(PM_RATE_128,PM_PRC_64);
        spl06_config_temperature(PM_RATE_8,TMP_PRC_8);
    
        spl06_start(MEAS_CTRL_ContinuousPressTemp); //启动连续的气压温度测量
        delay_ms(20);
    
        return 0;
    }
    
    void spl06_start(uint8_t mode)
    {
        spl06_write_reg(SP06_MEAS_CFG, mode);
    }
    
    void spl06_config_temperature(uint8_t rate,uint8_t oversampling)
    {
        switch(oversampling)
        {
            case TMP_PRC_1:
                _kT = 524288;
                break;
            case TMP_PRC_2:
                _kT = 1572864;
                break;
            case TMP_PRC_4:
                _kT = 3670016;
                break;
            case TMP_PRC_8:
                _kT = 7864320;
                break;
            case TMP_PRC_16:
                _kT = 253952;
                break;
            case TMP_PRC_32:
                _kT = 516096;
                break;
            case TMP_PRC_64:
                _kT = 1040384;
                break;
            case TMP_PRC_128:
                _kT = 2088960;
                break;
        }
    
        spl06_write_reg(SP06_TMP_CFG,rate|oversampling|0x80);   //温度每秒128次测量一次
        if(oversampling > TMP_PRC_8)
        {
            uint8_t temp = spl06_read_reg(SP06_CFG_REG);
            spl06_write_reg(SP06_CFG_REG,temp|SPL06_CFG_T_SHIFT);
        }
    }
    
    void spl06_config_pressure(uint8_t rate,uint8_t oversampling)
    {
        switch(oversampling)
        {
            case PM_PRC_1:
                _kP = 524288;
                break;
            case PM_PRC_2:
                _kP = 1572864;
                break;
            case PM_PRC_4:
                _kP = 3670016;
                break;
            case PM_PRC_8:
                _kP = 7864320;
                break;
            case PM_PRC_16:
                _kP = 253952;
                break;
            case PM_PRC_32:
                _kP = 516096;
                break;
            case PM_PRC_64:
                _kP = 1040384;
                break;
            case PM_PRC_128:
                _kP = 2088960;
                break;
        }
    
        spl06_write_reg(SP06_PSR_CFG,rate|oversampling);
        if(oversampling > PM_PRC_8)
        {
            uint8_t temp = spl06_read_reg(SP06_CFG_REG);
            spl06_write_reg(SP06_CFG_REG,temp|SPL06_CFG_P_SHIFT);
        }
    }
    
    int32_t spl06_get_pressure_adc()
    {
        uint8_t buf[3];
        int32_t adc;
    
        spl06_read_buffer(SP06_PSR_B2,buf,3);
        adc = (int32_t)(buf[0]<<16) + (buf[1]<<8) + buf[2];
        adc = (adc&0x800000)?(0xFF000000|adc):adc;
    
        return adc;
    }
    
    int32_t spl06_get_temperature_adc()
    {
        uint8_t buf[3];
        int32_t adc;
    
        spl06_read_buffer(SP06_TMP_B2,buf,3);
        adc = (int32_t)(buf[0]<<16) + (buf[1]<<8) + buf[2];
    
        return adc;
    }
    
    void spl06_update_pressure()
    {
        float Traw_src, Praw_src;
        float qua2, qua3;
    
        Traw_src = _kT * _raw_temp;
        Praw_src = _kP * _raw_press;
    
        //计算温度
        _Temp = 0.5f*_C0 + Traw_src * _C1;
    
        //计算气压
        qua2 = _C10 + Praw_src * (_C20 + Praw_src* _C30);
        qua3 = Traw_src * Praw_src * (_C11 + Praw_src * _C21);
        _Press = _C00 + Praw_src * qua2 + Traw_src * _C01 + qua3;
    }
    
    void spl06_update()
    {
        _raw_temp = spl06_get_temperature_adc();
        _raw_press = spl06_get_pressure_adc();
        spl06_update_pressure();
    }
    
    float spl06_get_temperature()
    {
        return _Temp;
    }
    
    float spl06_get_pressure()
    {
        return _Press;
    }
    
    uint8_t spi2_write_reg(uint8_t reg_addr,uint8_t reg_val)
    {
        spi2_read_write_byte(reg_addr&0x7f);
        spi2_read_write_byte(reg_val);
    
        return 0;
    }
    
    uint8_t spi2_read_reg(uint8_t reg_addr)
    {
        spi2_read_write_byte(reg_addr|0x80);
        return spi2_read_write_byte(0xff);
    }
    uint8_t spi2_read_reg_buffer(uint8_t reg_addr,void *buffer,uint16_t len)
    {
        uint8_t *p = buffer;
        uint16_t i;
    
        spi2_read_write_byte(reg_addr|0x80);
        for(i=0;i<len;i++)
        {
            *p++= spi2_read_write_byte(0xff);
        }
    
        return 0;
    }

[https_download.csdn.net_download_zhangxuechao_10548473]: https://download.csdn.net/download/zhangxuechao_/10548473
[1]: /images/20221120/d9c347002e2e44a6b53b4c06087b8e1d.png
[1 1]: /images/20221120/1adf1f44df8a41dbb55526503137a18a.png