sht31

#ifndef __SHT31_DIS__H__ #define __SHT31_DIS__H__
#include "I2C.h" #include "stm32f1xx_hal.h" #include "Delay.h"
#define ACK 1 #define NACK 0
/**************注意要把SDA配置成开漏模式*****************/ #define set_sht31_scl PAout(15) #define set_sht31_sda PBout(3) #define get_sht31_sda PBin(3)
////ADRESS //#define SHT3X_ADRESS_A             0x44      //ADDR->VSS //#define SHT3X_ADRESS_B             0x45      //ADDR->VDD
//<<1          ！！！！！！！！！！！！！这个很重要 #define SHT31_RHT_W   0X88 #define SHT31_RHT_R   0X89
//MODE COMMAND   #define Mode_Set_H    0x21     #define Mode_Set_L    0X2D
struct sht31_obj {     uint16_t sth31_RH_Thread_Time;//别忘了需要被DelayTimeCount_ms     struct I2C_Device HardWare;
    uint16_t   adc_t;     uint16_t   adc_rh;     float   Temperture;//单位0.01℃     float   Humidty;     //单位1%     uint8_t Status;     uint8_t RH_Status;     uint8_t RH_Read_Time; };
extern struct sht31_obj sht31_co2;
void sht31HardWareInit(void); void sht31_1s_thread(struct sht31_obj *PARA);

#endif

/***************************************************************************************************************************/

/***************************************************************************************************************************/

#include  "sht31-dis.h"
struct sht31_obj sht31_co2;

static void set_sht31_scl_fuc(uint8_t a) {     if(a!=0)     {         set_sht31_scl = 1;       }     else     {         set_sht31_scl = 0;     } } static void set_sht31_sda_fuc(uint8_t a) {     if(a!=0)     {         set_sht31_sda = 1;     }     else     {         set_sht31_sda = 0;     } } static uint8_t get_sht31_sda_fuc(void) {     return get_sht31_sda; }

static uint8_t sht31_mode_set(struct sht31_obj *PARA, uint8_t mode_h,uint8_t mode_l) {     I2C_Start(&PARA->HardWare);     I2C_WriteOneByte(&PARA->HardWare,SHT31_RHT_W);     if(Receive_ACK(&PARA->HardWare)!=1)     {         return 0;     }     I2C_WriteOneByte(&PARA->HardWare,Mode_Set_H);     if(Receive_ACK(&PARA->HardWare)!=1)     {         return 0;     }     I2C_WriteOneByte(&PARA->HardWare,Mode_Set_L);     if(Receive_ACK(&PARA->HardWare)!=1)     {         return 0;     }         I2C_Stop(&PARA->HardWare);     return 1; }
void sht31HardWareInit(void) {     sht31_co2.HardWare.Get_SDA = get_sht31_sda_fuc;     sht31_co2.HardWare.Set_SCL = set_sht31_scl_fuc;     sht31_co2.HardWare.Set_SDA = set_sht31_sda_fuc;     sht31_co2.HardWare.delayus = I2C_delay_nus;         /*0x212d*/     sht31_mode_set(&sht31_co2,Mode_Set_H,Mode_Set_L); }
uint8_t StartReadRHTemperature(struct sht31_obj *PARA) {     I2C_Start(&PARA->HardWare);     I2C_WriteOneByte(&PARA->HardWare,SHT31_RHT_W);     if(Receive_ACK(&PARA->HardWare)!=1)     {         return 0;     }     I2C_WriteOneByte(&PARA->HardWare,0xE0);     if(Receive_ACK(&PARA->HardWare)!=1)     {         return 0;     }     I2C_WriteOneByte(&PARA->HardWare,0x00);     if(Receive_ACK(&PARA->HardWare)!=1)     {         return 0;     }     I2C_Start(&PARA->HardWare);     I2C_WriteOneByte(&PARA->HardWare,SHT31_RHT_R);     if(Receive_ACK(&PARA->HardWare)!=1)     {         return 0;     }     return 1; }

uint8_t sht31ReadRHTemperature(struct sht31_obj *PARA) {     uint8_t   T_Data_MSB, T_Data_LSB, RH_Data_MSB, RH_Data_LSB;     uint8_t   CRC8_1, CRC8_2;     uint16_t  data_t, data_rh;             T_Data_MSB = I2C_ReadOneByte(&PARA->HardWare,ACK);     T_Data_LSB = I2C_ReadOneByte(&PARA->HardWare,ACK);     CRC8_1 = I2C_ReadOneByte(&PARA->HardWare,ACK);         RH_Data_MSB = I2C_ReadOneByte(&PARA->HardWare,ACK);     RH_Data_LSB = I2C_ReadOneByte(&PARA->HardWare,ACK);     CRC8_2 = I2C_ReadOneByte(&PARA->HardWare,NACK);     I2C_Stop(&PARA->HardWare);
//  data_rh = (RH_Data_MSB<<8)|(RH_Data_LSB&0xfc); //  PARA->Humidty = -6.0f+(125.0*(float)data_rh/65535);     data_rh = (RH_Data_MSB<<8)|(RH_Data_LSB);     PARA->Humidty = 100*((float)data_rh/65535);         data_t = (T_Data_MSB<<8)|(T_Data_LSB);     PARA->Temperture = -45 + 175*((float)data_t/65535);     return 1; } void sht31_1s_thread(struct sht31_obj *PARA) {     switch(PARA->RH_Status)     {         case 0://启动温湿度检测         {             if(StartReadRHTemperature(PARA)!=0)             {                 PARA->RH_Status++;             }             else             {                 PARA->RH_Status = 0;//不应答就复位                 I2C_Stop(&PARA->HardWare);                 PARA->RH_Read_Time = 2;                 return;             }         }
        case 1:         {             if(sht31ReadRHTemperature(PARA)!=0)             {                 PARA->RH_Read_Time = 0;                 PARA->RH_Status++;             }             else             {                 PARA->RH_Read_Time++;                 if(PARA->RH_Read_Time>5)                 {                     I2C_Stop(&PARA->HardWare);                     PARA->RH_Read_Time = 0;                     PARA->RH_Status ++;                 }             }         }break;         case 2:         {             Set_Delay_Time(1000,&PARA->sth31_RH_Thread_Time);             PARA->RH_Status++;               }break;         case 3:         {             if(CheckDelay(&PARA->sth31_RH_Thread_Time)==0)             {                 PARA->RH_Status=0;             }         }break;         default:         {             PARA->RH_Status = 0;         }break;     } }