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光线传感器BH1750

ops 2025/8/29 17:07:39

软件IIC：软件I2C master2-CSDN博客

SoftI2C_Port:SoftI2C_Port-CSDN博客

BH1750.h

#ifndef BH1750_h
#define BH1750_h
#include"SoftI2CMaster.h"
extern void Single_Write_BH1750(SoftI2CMasterWireObj wireObj,unsigned char instaruction);
extern int BH1750Read(SoftI2CMasterWireObj wireObj);
#endif

BH1750.c

#include"BH1750.h"
#define AddrPin 0
#if AddrPin
#define SlaveADDR 0xB8
#else
#define SlaveADDR 0x46
#endif
void Single_Write_BH1750(SoftI2CMasterWireObj wireObj,unsigned char instaruction)
{int i,j;SoftI2CMaster_Start(wireObj);SoftI2CMaster_LoadOutByte(wireObj,SlaveADDR);j=0;while(SoftI2CMaster_WaitAck(wireObj)==1){j++;if(j==15000){SoftI2CMaster_Stop(wireObj);return;}};SoftI2CMaster_LoadOutByte(wireObj,instaruction);j=0;while(SoftI2CMaster_WaitAck(wireObj)==1){j++;if(j==15000){SoftI2CMaster_Stop(wireObj);return;}};SoftI2CMaster_Stop(wireObj);
}
int BH1750Read(SoftI2CMasterWireObj wireObj)
{unsigned char rxBuff[2];int i,j;SoftI2CMaster_Start(wireObj);SoftI2CMaster_LoadOutByte(wireObj,SlaveADDR|1);j=0;while(SoftI2CMaster_WaitAck(wireObj)==1){j++;if(j==15000){SoftI2CMaster_Stop(wireObj);return -1;}};for(i=0;i<sizeof(rxBuff);i++){rxBuff[i]=SoftI2CMaster_WaitData(wireObj);if(i+1==sizeof(rxBuff)){SoftI2CMaster_LoadOutACK(wireObj,0);//NACK}else{SoftI2CMaster_LoadOutACK(wireObj,1);//ACK}}SoftI2CMaster_Stop(wireObj);return rxBuff[0]<<8|rxBuff[1];
}
#ifdef XC
#ifdef Debug
#include"XCOSnTh.h"
#include"I2CPort.h"
static void BH1750_Init(AutoCallObj obj,void *cThis)
{Single_Write_BH1750(&I2CPort002,0x01);// power onSingle_Write_BH1750(&I2CPort002,0x10);// H- resolution mode//Single_Write_BH1750(&I2CPort002,0x23);// L- resolution mode//{volatile int i=1000000;while(i--);}//延迟180ms后才能读取数据
}
AutoCall_InitDef(100,V_BH1750_Init,BH1750_Init,"");
static int BH1750Read_CMD(CmdObj obj, char* str, int len)
{unsigned short int temp;float lx;
//	Single_Write_BH1750(&I2CPort002,0x01);
//	Single_Write_BH1750(&I2CPort002,0x10);
//	{volatile int i=1000000;while(i--);}temp=BH1750Read(&I2CPort002);lx=(float)temp/1.2;obj->printf("\r\n%f",lx);return 1;
}
CmdDef(BH1750, 0, BH1750Read_CMD, "");
#endif
#endif

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