/***************************************************************
*   File name    :  SHT20.h 
*   Description  :  SHT20 Humidity and Temperature Sensors 
*     M C U      :  STM32L051XX
*   Compiler     :  Keil uVision V5.00a 
*   Created by   :   
*   Copyright    :  Copyright(c) 2018 
*   Created data :  2018.03.16
*   Modified data:  2018.03.16
*   Vision       :  V1.0
*****************************************************************/

/*****************Function Declaration*************************/
/*----define to easier to use-----*/
#include <stdint.h>
#include "bsp.h"

typedef enum {
	SHT20_IDLE,
	SHT20_INIT,
	SHT20_READ_TEMPR,
	SHT20_READ_HUMI,
	SHT20_READ_DATA
}SHT20Status_m;

typedef struct {
	SHT20Status_m Sht20Status;
	int Sht201mSDelayCnt;
	float Tempreture;
	float Humidity;
	uint8_t Cmd;
}SHT20Var_t;

#define SHT20_Write_Add						0x80
#define SHT20_Read_Add						0x81
#define SHT20_Measurement_RH_HM		0XE5
#define SHT20_Measurement_T_HM  	0XE3
#define SHT20_Measurement_RH_NHM  0XF5  //非主机模式地址
#define SHT20_Measurement_T_NHM		0XF3   //非主机模式地址
#define SHT20_READ_REG						0XE7
#define SHT20_WRITE_REG						0XE6
#define SHT20_SOFT_RESET					0XFE

//#define I2C_SOFTWARE

#ifdef I2C_SOFTWARE

#define SHT20_ADDRESS							0X80
	
#define	SHT20_SDA_IN()						I2C_SDA_IN()       //设置引脚输入模式   
#define	SHT20_SDA_OUT()						I2C_SDA_OUT()     //设置引脚输出模式   
#define	SHT20_SDA_GET()						I2C_SDA_GET()

#define SHT20_I2C_SDA_LOW()				I2C_SDA_LOW()
#define SHT20_I2C_SCL_LOW()				I2C_SCL_LOW()
#define SHT20_I2C_SDA_HIGH()			I2C_SDA_HIGH()
#define SHT20_I2C_SCL_HIGH()			I2C_SCL_HIGH()


#define SHT20_I2C_LOW() {SHT20_I2C_SDA_LOW();SHT20_I2C_SCL_LOW();}  
 
/*================================================================
[  Name  ]void IO_I2CInit(void)
[Function]I2C初始化 空闲状态
[  Notes ]
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
void IO_I2CInit(void);

/*================================================================
[  Name  ]I2CStart
[Function]开始
[  Notes ]
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
void I2CStart(void);

/*================================================================
[  Name  ]I2CStop
[Function]结束
[  Notes ]
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
void I2CStop(void);

/*================================================================
[  Name  ]I2C_Write_Byte
[Function]写一个字节  返回ACK或NACK
[  Notes ]从高到低发
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
uint8_t I2C_Write_Byte(uint8_t Write_Byte);

/*================================================================
[  Name  ]I2C_Read_Byte
[Function]读一个字节，入库参数用于控制应答状态 ACK或NAC
[  Notes ]从高到低
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
uint8_t I2C_Read_Byte(uint8_t AckValue);


/*================================================================
[  Name  ]SHT20_SoftReset
[Function]SHT20软件复位
[  Notes ]从高到低
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
void SHT20_SoftReset(void);

/*================================================================
[  Name  ]SET_Resolution
[Function]写寄存器 设置分辨率
[  Notes ]从高到低
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
void SET_Resolution(void);

/*================================================================
[  Name  ]ReadSht20
[Function]非主机模式，读取温湿度值
[  Notes ]入口控制读取温度或湿度
[ Author ]LZH
[  Data  ]2016.06.22
================================================================*/
float ReadSht20(char whatdo);

float ReadSht20_Medium (void);

#else

#define SHT20_ADDRESS							0X40

#define	Sht20_Reg_Write(DevAddr, RegData, rLen)													I2C_Write(DevAddr, NULL, RegData, rLen)
#define	Sht20_Read(DevAddr, RegAddr, rData, rLen)												I2C_Read(DevAddr, RegAddr, rData, rLen)
#define	Sht20_Delay(x)																  

void SHT20_reset(void);


#endif
void SHT20_GetValue(float *Tempreture, float *Humidity);
void SHT20Start(void);
void SHT20LoopHandler(void);
void SHT201mSRoutine(void);