BH1750數(shù)字光強(qiáng)度測試儀設(shè)計(jì)LCD1602顯示+51單片機(jī)C語言程序完整版(共8頁)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上/*/ BH1750FVI IIC測試程序/ 使用單片機(jī)STC89C51 / 晶振：11.0592M/ 顯示：LCD1602/ 作者：dice szj QQ:/ 編譯環(huán)境 Keil uVision2/*#include <REG51.H>#include <math.h> /Keil library #include <stdio.h> /Keil library#include <INTRINS.H>#define uchar unsigned char#define uint unsigned int#define

2、DataPort P0 /LCD1602數(shù)據(jù)端口sbit SCL=P10; /IIC時(shí)鐘引腳定義sbit SDA=P11; /IIC數(shù)據(jù)引腳定義sbit LCM_RS=P24; /LCD1602命令端口sbit LCM_RW=P25; /LCD1602命令端口sbit LCM_EN=P26; /LCD1602命令端口 #define SlaveAddress 0x46 /定義器件在IIC總線中的從地址,根據(jù)ALT ADDRESS地址引腳不同修改 /ALT ADDRESS引腳接地時(shí)地址為0x46，接電源時(shí)地址為0xB8typedef unsigned char BYTE;typedef unsi

3、gned short WORD;BYTE BUF8; /接收數(shù)據(jù)緩存區(qū) uchar ge,shi,bai,qian,wan; /顯示變量int dis_data; /變量void delay_nms(unsigned int k);void InitLcd();void Init_BH1750(void);void WriteDataLCM(uchar dataW);void WriteCommandLCM(uchar CMD,uchar Attribc);void DisplayOneChar(uchar X,uchar Y,uchar DData);void conversion(uint

4、 temp_data);void Single_Write_BH1750(uchar REG_Address); /單個(gè)寫入數(shù)據(jù)uchar Single_Read_BH1750(uchar REG_Address); /單個(gè)讀取內(nèi)部寄存器數(shù)據(jù)void Multiple_Read_BH1750(); /連續(xù)的讀取內(nèi)部寄存器數(shù)據(jù)/-void Delay5us();void Delay5ms();void BH1750_Start(); /起始信號(hào)void BH1750_Stop(); /停止信號(hào)void BH1750_SendACK(bit ack); /應(yīng)答ACKbit BH1750_RecvA

5、CK(); /讀ackvoid BH1750_SendByte(BYTE dat); /IIC單個(gè)字節(jié)寫B(tài)YTE BH1750_RecvByte(); /IIC單個(gè)字節(jié)讀/-/*void conversion(uint temp_data) / 數(shù)據(jù)轉(zhuǎn)換出 個(gè)，十，百，千，萬 wan=temp_data/10000+0x30 ; temp_data=temp_data%10000; /取余運(yùn)算qian=temp_data/1000+0x30 ; temp_data=temp_data%1000; /取余運(yùn)算 bai=temp_data/100+0x30 ; temp_data=temp_dat

6、a%100; /取余運(yùn)算 shi=temp_data/10+0x30 ; temp_data=temp_data%10; /取余運(yùn)算 ge=temp_data+0x30; /毫秒延時(shí)*void delay_nms(unsigned int k)unsigned int i,j;for(i=0;i<k;i+)for(j=0;j<121;j+);/*/void WaitForEnable(void)DataPort=0xff;LCM_RS=0;LCM_RW=1;_nop_();LCM_EN=1;_nop_();_nop_();while(DataPort&0x80);LCM_E

7、N=0;/*/void WriteCommandLCM(uchar CMD,uchar Attribc)if(Attribc)WaitForEnable();LCM_RS=0;LCM_RW=0;_nop_();DataPort=CMD;_nop_();LCM_EN=1;_nop_();_nop_();LCM_EN=0;/*/void WriteDataLCM(uchar dataW)WaitForEnable();LCM_RS=1;LCM_RW=0;_nop_();DataPort=dataW;_nop_();LCM_EN=1;_nop_();_nop_();LCM_EN=0;/*/void

8、InitLcd()WriteCommandLCM(0x38,1);WriteCommandLCM(0x08,1);WriteCommandLCM(0x01,1);WriteCommandLCM(0x06,1);WriteCommandLCM(0x0c,1);/*/void DisplayOneChar(uchar X,uchar Y,uchar DData)Y&=1;X&=15;if(Y)X|=0x40;X|=0x80;WriteCommandLCM(X,0);WriteDataLCM(DData);/*延時(shí)5微秒(STC90C52RC12M)不同的工作環(huán)境,需要調(diào)整此函數(shù)，注

9、意時(shí)鐘過快時(shí)需要修改當(dāng)改用1T的MCU時(shí),請調(diào)整此延時(shí)函數(shù)*/void Delay5us() _nop_();_nop_();_nop_();_nop_(); _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();/*延時(shí)5毫秒(STC90C52RC12M)不同的工作環(huán)境,需要調(diào)整此函數(shù)當(dāng)改用1T的MCU時(shí),請調(diào)整此延時(shí)函數(shù)*/void Delay5ms() WORD n = 560; while (n-);/*起始信號(hào)*/void BH1750_Start

10、() SDA = 1; /拉高數(shù)據(jù)線 SCL = 1; /拉高時(shí)鐘線 Delay5us(); /延時(shí) SDA = 0; /產(chǎn)生下降沿 Delay5us(); /延時(shí) SCL = 0; /拉低時(shí)鐘線/*停止信號(hào)*/void BH1750_Stop() SDA = 0; /拉低數(shù)據(jù)線 SCL = 1; /拉高時(shí)鐘線 Delay5us(); /延時(shí) SDA = 1; /產(chǎn)生上升沿 Delay5us(); /延時(shí)/*發(fā)送應(yīng)答信號(hào)入口參數(shù):ack (0:ACK 1:NAK)*/void BH1750_SendACK(bit ack) SDA = ack; /寫應(yīng)答信號(hào) SCL = 1; /拉高時(shí)鐘線 D

11、elay5us(); /延時(shí) SCL = 0; /拉低時(shí)鐘線 Delay5us(); /延時(shí)/*接收應(yīng)答信號(hào)*/bit BH1750_RecvACK() SCL = 1; /拉高時(shí)鐘線 Delay5us(); /延時(shí) CY = SDA; /讀應(yīng)答信號(hào) SCL = 0; /拉低時(shí)鐘線 Delay5us(); /延時(shí) return CY;/*向IIC總線發(fā)送一個(gè)字節(jié)數(shù)據(jù)*/void BH1750_SendByte(BYTE dat) BYTE i; for (i=0; i<8; i+) /8位計(jì)數(shù)器 dat <<= 1; /移出數(shù)據(jù)的最高位 SDA = CY; /送數(shù)據(jù)口 SCL

12、 = 1; /拉高時(shí)鐘線 Delay5us(); /延時(shí) SCL = 0; /拉低時(shí)鐘線 Delay5us(); /延時(shí) BH1750_RecvACK();/*從IIC總線接收一個(gè)字節(jié)數(shù)據(jù)*/BYTE BH1750_RecvByte() BYTE i; BYTE dat = 0; SDA = 1; /使能內(nèi)部上拉,準(zhǔn)備讀取數(shù)據(jù), for (i=0; i<8; i+) /8位計(jì)數(shù)器 dat <<= 1; SCL = 1; /拉高時(shí)鐘線 Delay5us(); /延時(shí) dat |= SDA; /讀數(shù)據(jù) SCL = 0; /拉低時(shí)鐘線 Delay5us(); /延時(shí) return

13、dat;/*void Single_Write_BH1750(uchar REG_Address) BH1750_Start(); /起始信號(hào) BH1750_SendByte(SlaveAddress); /發(fā)送設(shè)備地址+寫信號(hào) BH1750_SendByte(REG_Address); /內(nèi)部寄存器地址， / BH1750_SendByte(REG_data); /內(nèi)部寄存器數(shù)據(jù)， BH1750_Stop(); /發(fā)送停止信號(hào)/*單字節(jié)讀取*/*uchar Single_Read_BH1750(uchar REG_Address) uchar REG_data; BH1750_Start()

14、; /起始信號(hào) BH1750_SendByte(SlaveAddress); /發(fā)送設(shè)備地址+寫信號(hào) BH1750_SendByte(REG_Address); /發(fā)送存儲(chǔ)單元地址，從0開始 BH1750_Start(); /起始信號(hào) BH1750_SendByte(SlaveAddress+1); /發(fā)送設(shè)備地址+讀信號(hào) REG_data=BH1750_RecvByte(); /讀出寄存器數(shù)據(jù)BH1750_SendACK(1); BH1750_Stop(); /停止信號(hào) return REG_data; */*/連續(xù)讀出BH1750內(nèi)部數(shù)據(jù)/*void Multiple_read_BH175

15、0(void) uchar i; BH1750_Start(); /起始信號(hào) BH1750_SendByte(SlaveAddress+1); /發(fā)送設(shè)備地址+讀信號(hào) for (i=0; i<3; i+) /連續(xù)讀取2個(gè)地址數(shù)據(jù)，存儲(chǔ)中BUF BUFi = BH1750_RecvByte(); /BUF0存儲(chǔ)0x32地址中的數(shù)據(jù) if (i = 3) BH1750_SendACK(1); /最后一個(gè)數(shù)據(jù)需要回NOACK else BH1750_SendACK(0); /回應(yīng)ACK BH1750_Stop(); /停止信號(hào) Delay5ms();/初始化BH1750，根據(jù)需要請參考pdf進(jìn)

16、行修改*void Init_BH1750() Single_Write_BH1750(0x01); /*/主程序*/*void main() float temp; delay_nms(100); /延時(shí)100ms InitLcd(); /初始化LCD Init_BH1750(); /初始化BH1750 while(1) /循環(huán) Single_Write_BH1750(0x01); / power on Single_Write_BH1750(0x10); / H- resolution mode delay_nms(180); /延時(shí)180ms Multiple_Read_BH1750(); /連續(xù)讀出數(shù)據(jù)，存儲(chǔ)在BUF中 dis_data=BUF0; dis_data=(dis_data<<8)+BUF1; /合成數(shù)據(jù)，即光照數(shù)據(jù) temp=(float)dis_data/1.2; conversion(temp); /計(jì)算數(shù)據(jù)和顯示DisplayOneChar(0,0,'L'); DisplayOneChar(1,0,'i'); DisplayOneChar(2,0,'g'); DisplayOneChar(3,0,'h'); DisplayOneChar