void Single_Write_BH1750(uint8_t REG_Data)

{

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY)!=RESET);//檢測是否總線忙

I2C_TransferHandling(I2C1,SlaveAddress,1,I2C_SoftEnd_Mode,I2C_Generate_Start_Write);

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_TXIS)==RESET);//檢測發送

I2C_SendData(I2C1,REG_Data);

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_TC)==RESET);

I2C_GenerateSTOP(I2C1,ENABLE);

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_STOPF)==RESET);//是否停止

}

uint16_t Read_BH1750()

{

uint16_t Recev=0x00;//光強為16位。先發送高8后低8

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY)!=RESET);//IFBUSY

I2C_TransferHandling(I2C1,SlaveAddress+1,2,I2C_AutoEnd_Mode,I2C_Generate_Start_Read);

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_RXNE)==RESET);

Recev|=I2C_ReceiveData(I2C1);Recev<<=8;

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_RXNE)==RESET);

Recev|=I2C_ReceiveData(I2C1);

while(I2C_GetFlagStatus(I2C1,I2C_FLAG_STOPF)==RESET);

return Recev;

}

void BH1750_Get_Guang(float*Zhaodu)

#include"stm32f10x_lib.h"

#define uchar unsigned char

#define uint unsigned int

#define DataPort P0//LCD1602數據端口

#define SlaveAddress 0x46#define BH1750_SCL GPIO_Pin_14

#define BH1750_SDA GPIO_Pin_15

#define GPIO_I2C GPIOB

#defineBH1750_SCL_0()GPIOF->BRR=BH1750_SCL

#define BH1750_SCL_1()GPIOF->BSRR=BH1750_SCL

#define BH1750_SDA_0()GPIOF->BRR=BH1750_SDA

#define BH1750_SDA_1()GPIOF->BSRR=BH1750_SDA

#define BH1750_SDA_STATE()(GPIOF->IDR&BH1750_SDA)

return(GPIOB->IDR typedefunsigned char BYTE;

typedef unsigned short WORD;BYTE BUF[8];//接收數據緩存區

uchar ge,shi,bai,qian,wan;//顯示變量

int dis_data;//變量

void Init_BH1750(void);

void conversion(uint temp_data);void Single_Write_BH1750(ucharREG_Address); uchar Single_Read_BH1750(uchar REG_Address);

void Multiple_Read_BH1750(void);//連續的讀取內部寄存器數據

u8BH1750_Start(void);

void BH1750_Stop(void);

u8 BH1750_SendByte(u8 Data);

u8 BH1750_ReceiveByte(void);

void BH1750_SendACK(void);

void BH1750_SendNACK(void);

void BH1750_Nop

(void voidBH1750_Delay(unsigned int u8BH1750_ACK u8BH1750_READYu8BH1750_NACK

u8BH1750_BUS_BUSY

u8BH1750_BUS_ERROR u8BH1750_RETRY_COUNT//重試次數

void BH1750_Nop(void)u8i=50;

while(i)

voidBH1750_Delay(unsigned

int unsignedintu8BH1750_Start(void)BH1750_SDA_1();BH1750_Nop();

BH1750_SCL_1();BH1750_Nop();

if(!BH1750_SDA_STATE())//

//DebugPrint("TWI_START:BUSY\n");

return BH1750_BUS_BUSY;

BH1750_SDA_0();

BH1750_Nop();

BH1750_SCL_0();BH1750_Nop();

if(BH1750_SDA_STATE())//

//DebugPrint("TWI_START:BUSERROR\n");

return BH1750_BUS_ERROR;

returnBH1750_READY;

voidBH1750_Stop(void)

BH1750_SDA_0();BH1750_Nop();

BH1750_SCL_1();BH1750_Nop();

BH1750_SDA_1();BH1750_Nop();//

//DebugPrint("TWI_STOP\n");

voidBH1750_SendACK(void)BH1750_SDA_0();

BH1750_Nop();

BH1750_SCL_1();

BH1750_Nop();

BH1750_SCL_0();

BH1750_Nop();

BH1750_SDA_1();

//DebugPrint("TWI_SendACK\n");

voidBH1750_SendNACK(void)BH1750_SDA_1();

BH1750_Nop();

BH1750_SCL_1();

BH1750_Nop();

BH1750_SCL_0();

BH1750_Nop();//

//DebugPrint("TWI_SendNACK\n");

//---------數據建立----------if(Data&0x80)Data<<=1;BH1750_Nop();//---數據建立保持一定延時----//

BH1750_SCL_1();

BH1750_Nop();

BH1750_SCL_0();

BH1750_Nop();//延時,防止SCL還沒變成低時改變SDA,從而產生START/STOP信號//接收從機的應答BH1750_SDA_1();

BH1750_Nop();

BH1750_SCL_1();

BH1750_Nop();

if(BH1750_SDA_STATE())BH1750_SCL_0();BH1750_SDA_1();//

//DebugPrint("TWI_NACK!n");return BH1750_NACK;

BH1750_SCL_0();

BH1750_SDA_1();//

//DebugPrint("TWI_ACK!n");

return BH1750_ACK;

u8BH1750_ReceiveByte(void)u8i,Dat;

BH1750_SDA_1();

BH1750_SCL_0();

Dat=0;BH1750_SCL_1();//產生時鐘上升沿[正脈沖],讓從機準備好數據BH1750_Nop();

Dat<<=1;if(BH1750_SDA_STATE())//讀引腳狀態BH1750_SCL_0();//準備好再次接收數據BH1750_Nop();//等待數據準備好//

//DebugPrint("TWI_Dat:%xn",Dat);

return Dat;

//voidconversion(uint temp_data)temp_data=temp_data%10000;

//取余運算

temp_data=temp_data%1000;//取余運算

temp_data=temp_data%100;//取余運算

temp_data=temp_data%10;//取余運算

voidSingle_Write_BH1750(uchar

REG_Address)BH1750_Start();//起始信號

BH1750_SendByte(SlaveAddress);//發送設備地址+寫信號

BH1750_SendByte(REG_Address);//內部寄存器地址，

BH1750_SendByte(REG_data);//內部寄存器數據，

BH1750_Stop();//發送停止信號

ucharSingle_Read_BH1750(uchar REG_Address)

ucharREG_data;BH1750_Start();//起始信號

BH1750_SendByte(SlaveAddress);//發送設備地址+寫信號

BH1750_SendByte(REG_Address);//發送存儲單元地址，從0開始

BH1750_Start();//起始信號

BH1750_SendByte(SlaveAddress+1);//發送設備地址+讀信號

REG_data=BH1750_RecvByte();//讀出寄存器數

BH1750_SendACK(1);BH1750_Stop();//停止信號

return REG_data;//連續讀出BH1750內部數據

voidMultiple_Read_BH1750(void)BH1750_Start();

//起始信號

BH1750_SendByte(SlaveAddress+1);//發送設備地址+讀信號

BH1750_ReceiveByte();//BUF[0]存儲0x32地址中的數據

BH1750_SendNACK();//最后一個數據需要回NOACK

BH1750_SendACK();//回應

ACK BH1750_Stop();//停止信號//

Delay5ms();BH1750_Delay(500)//初始化BH1750，

void Init_BH1750()

voidBH1750_Get_Guang(float*Zhaodu)//延時100ms

Init_BH1750();//初始化BH1750

Single_Write_BH1750(0x01);

resolutionmode BH1750_Delay(200)//延時180ms

Multiple_Read_BH1750();//連續讀出數據，存儲在BUF dis_data=BUF[0];

dis_data=(dis_data<<8)+BUF[1];

//合成數據，即光照數據

*Zhaodu=(float)dis_data/1.2;