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#include <reg52.H>
#include <intrins.H>
#include <math.H>
#define uchar unsigned char
#define uint unsigned int
unsigned char pwm_motor_val =0;//左右電機(jī)占空比值取值范圍0-170，0最快
unsigned char pwm_t;//周期
sbit led=P1^0;
sbit _4IN = P3^7;//
sbit key_s2 = P3^0;
sbit key_s3 = P3^1;
sbit dula = P2^6;
sbit wela = P2^7;
sbit rw = P3^6;
sbit RS = P3^5;
sbit LCDEN = P3^4;
void delay(unsigned int z)//毫秒級(jí)延時(shí)
{
unsigned int x,y;
for(x = z; x > 0; x--)
for(y = 114; y > 0 ; y--);
}
//定時(shí)器0中斷
void timer0() interrupt 1
{
pwm_t++;
if(pwm_t == 255)
{ _4IN = 0;
led=1; }
if(pwm_motor_val == pwm_t)
{_4IN = 1;
led=0; }
}
void delayUs()
{
_nop_();
}
void delayMs(uint a)
{
uint i, j;
for(i = a; i > 0; i--)
for(j = 100; j > 0; j--);
}
void writeComm(uchar comm)
{
RS = 0;
P0 = comm;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);
}
//寫(xiě)數(shù)據(jù):RS=1, RW=0;
void writeData(uchar dat)
{
RS = 1;
P0 = dat;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);
}
void init()
{
rw = 0;
dula = wela = 0;
writeComm(0x38);
writeComm(0x0c);
writeComm(0x06);
writeComm(0x01);
}
void writeString(uchar * str, uchar length)
{
uchar i;
for(i = 0; i < length; i++)
{
writeData(str[i]);
}
}
/**//*****************************DS18B20*******************************/
sbit ds = P2^2;
void dsInit()
{
unsigned int i;
ds = 0;
i = 100;
while(i>0) i--;
ds = 1;
i = 4;
while(i>0) i--;
}
void dsWait()
{
unsigned int i;
while(ds);
while(~ds);
i = 4;
while(i > 0) i--;
}
bit readBit()
{
unsigned int i;
bit b;
ds = 0;
i++;
ds = 1;
i++; i++;
b = ds;
i = 8;
while(i>0) i--;
return b;
}
unsigned char readByte()
{
unsigned int i;
unsigned char j, dat;
dat = 0;
for(i=0; i<8; i++)
{
j = readBit();
dat = (j << 7) | (dat >> 1);
}
return dat;
}
void writeByte(unsigned char dat)
{
unsigned int i;
unsigned char j;
bit b;
for(j = 0; j < 8; j++)
{
b = dat & 0x01;
dat >>= 1;
if(b)
{
ds = 0; i++; i++;
ds = 1;
i = 8; while(i>0) i--;
}
else
{
ds = 0;
i = 8; while(i>0) i--;
ds = 1;
i++; i++;
}
}
}
void sendChangeCmd()
{
dsInit();
dsWait();
delayMs(1);
writeByte(0xcc);
writeByte(0x44);
}
void sendReadCmd()
{
dsInit();
dsWait();
delayMs(1);
writeByte(0xcc);
writeByte(0xbe);
}
int getTmpValue()
{
unsigned int tmpvalue;
int value;
float t;
unsigned char low, high;
sendReadCmd();
low = readByte();
high = readByte();
tmpvalue = high;
tmpvalue <<= 8;
tmpvalue |= low;
value = tmpvalue;
\
t = value * 0.0625;
\
value = t * 100 + (value > 0 ? 0.5 : -0.5); //大于0加0.5, 小于0減0.5
return value;
}
void display(int v)
{
unsigned char count;
unsigned char datas[] = {0, 0, 0, 0, 0};
unsigned int tmp = abs(v);
datas[0] = tmp / 10000;
datas[1] = tmp % 10000 / 1000;
datas[2] = tmp % 1000 / 100;
datas[3] = tmp % 100 / 10;
datas[4] = tmp % 10;
writeComm(0xc0+3);
if(v < 0)
{
writeString("- ", 2);
}
else
{
writeString("+ ", 2);
}
if(datas[0] != 0)
{
writeData('0'+datas[0]);
}
for(count = 1; count != 5; count++)
{
writeData('0'+datas[count]);
if(count == 2)
{
writeData('.');
}
}
}
/**//*****************************DS18B20*******************************/
void main()
{
uchar table[] = " xianzaiwendu: ";
sendChangeCmd();
init();
writeComm(0x80);
writeString(table, 16);
while(1)
{
delayMs(1000); //溫度轉(zhuǎn)換時(shí)間需要750ms以上
writeComm(0xc0);
display(getTmpValue());
sendChangeCmd();
TMOD |= 0x02;//8位自動(dòng)重裝模塊
TH0 = 220;
TL0 = 220;//11.0592M晶振下占空比最大比值是256,輸出100HZ
TR0 = 1;//啟動(dòng)定時(shí)器0
ET0 = 1;//允許定時(shí)器0中斷
EA = 1;//總中斷允許
if(key_s3 == 0) //S2按下LED變暗
{
delay(5);
if(key_s3 == 0)
{
if(pwm_motor_val < 170)
{
pwm_motor_val=pwm_motor_val+10;
}
}
}
if(key_s2 == 0) //S3按鍵LED變亮
{
delay(5);
if(key_s2 == 0)
{
if(pwm_motor_val > 0)
{
pwm_motor_val=pwm_motor_val-10;
}
}
}
}
}

復(fù)制代碼

#include <reg52.h> //包含頭文件，一般情況不需要改動(dòng)，頭文件包含特殊功能寄存器的定義
#include <intrins.h>
#include <math.h>
#define uchar unsigned char
#define uint unsigned int
unsigned int i;
unsigned char pwm_motor_val =0;//左右電機(jī)占空比值取值范圍0-170，0最快
unsigned char pwm_t;//周期
sbit led=P1^0;
sbit _4IN = P2^4;//
sbit key_s2 = P3^0;
sbit key_s3 = P3^1;
sbit RS = P3^5; //定義端口
sbit RW = P3^6;
sbit EN = P3^4;
sbit DU = P2^0;
sbit WE = P2^1;
sbit Data = P3^7;//定義數(shù)據(jù)線
uchar rec_dat[15]; //用于顯示的接收數(shù)據(jù)數(shù)組
#define RS_CLR RS=0
#define RS_SET RS=1
#define RW_CLR RW=0
#define RW_SET RW=1
#define EN_CLR EN=0
#define EN_SET EN=1
#define DataPort P0
void delay(unsigned int z)//毫秒級(jí)延時(shí)
{
unsigned int x,y;
for(x = z; x > 0; x--)
for(y = 114; y > 0 ; y--);
}
void cmg88()//關(guān)數(shù)碼管，點(diǎn)陣函數(shù)
{
DU=1;
P0=0X00;
DU=0;
}
/*------------------------------------------------
uS延時(shí)函數(shù)，含有輸入?yún)?shù) unsigned char t，無(wú)返回值
unsigned char 是定義無(wú)符號(hào)字符變量，其值的范圍是
0~255 這里使用晶振12M，精確延時(shí)請(qǐng)使用匯編,大致延時(shí)
長(zhǎng)度如下 T=tx2+5 uS
------------------------------------------------*/
void DelayUs2x(unsigned char t)
{
while(--t);
}
/*------------------------------------------------
mS延時(shí)函數(shù)，含有輸入?yún)?shù) unsigned char t，無(wú)返回值
unsigned char 是定義無(wú)符號(hào)字符變量，其值的范圍是
0~255 這里使用晶振12M，精確延時(shí)請(qǐng)使用匯編
------------------------------------------------*/
void DelayMs(unsigned char t)
{
while(t--)
{
//大致延時(shí)1mS
DelayUs2x(245);
DelayUs2x(245);
}
}
/*------------------------------------------------
判忙函數(shù)
------------------------------------------------*/
bit LCD_Check_Busy(void)
{
DataPort= 0xFF;
RS_CLR;
RW_SET;
EN_CLR;
_nop_();
EN_SET;
return (bit)(DataPort & 0x80);
}
/*------------------------------------------------
寫(xiě)入命令函數(shù)
------------------------------------------------*/
void LCD_Write_Com(unsigned char com)
{
while(LCD_Check_Busy()); //忙則等待
RS_CLR;
RW_CLR;
EN_SET;
DataPort= com;
_nop_();
EN_CLR;
}
/*------------------------------------------------
寫(xiě)入數(shù)據(jù)函數(shù)
------------------------------------------------*/
void LCD_Write_Data(unsigned char Data)
{
while(LCD_Check_Busy()); //忙則等待
RS_SET;
RW_CLR;
EN_SET;
DataPort= Data;
_nop_();
EN_CLR;
}
/*------------------------------------------------
清屏函數(shù)
------------------------------------------------*/
void LCD_Clear(void)
{
LCD_Write_Com(0x01);
DelayMs(5);
}
/*------------------------------------------------
寫(xiě)入字符串函數(shù)
------------------------------------------------*/
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x); //表示第一行
}
else
{
LCD_Write_Com(0xC0 + x); //表示第二行
}
while (*s)
{
LCD_Write_Data( *s);
s ++;
}
}
/*------------------------------------------------
寫(xiě)入字符函數(shù)
------------------------------------------------*/
void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x);
}
else
{
LCD_Write_Com(0xC0 + x);
}
LCD_Write_Data( Data);
}
/*------------------------------------------------
初始化函數(shù)
------------------------------------------------*/
void LCD_Init(void)
{
LCD_Write_Com(0x38); /*顯示模式設(shè)置*/
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
LCD_Write_Com(0x08); /*顯示關(guān)閉*/
LCD_Write_Com(0x01); /*顯示清屏*/
LCD_Write_Com(0x06); /*顯示光標(biāo)移動(dòng)設(shè)置*/
DelayMs(5);
LCD_Write_Com(0x0C); /*顯示開(kāi)及光標(biāo)設(shè)置*/
}
/*------------------------------------------------
DHT11延時(shí)函數(shù)
------------------------------------------------*/
void DHT11_delay_us(uchar n)
{
while(--n);
}
void DHT11_delay_ms(uint z)
{
uint i,j;
for(i=z;i>0;i--)
for(j=110;j>0;j--);
}
/*------------------------------------------------
DHT11開(kāi)始信號(hào)
------------------------------------------------*/
void DHT11_start()
{
Data=1;
DHT11_delay_us(2);
Data=0;
DHT11_delay_ms(20); //延時(shí)18ms以上
Data=1;
DHT11_delay_us(30);
}
/*------------------------------------------------
接收八位二進(jìn)制
------------------------------------------------*/
uchar DHT11_rec_byte() //接收一個(gè)字節(jié)
{
uchar i,dat=0;
for(i=0;i<8;i++) //從高到低依次接收8位數(shù)據(jù)
{
while(!Data); //等待50us低電平過(guò)去
DHT11_delay_us(8); //延時(shí)60us，如果還為高則數(shù)據(jù)為1，否則為0
dat<<=1; //移位使正確接收8位數(shù)據(jù)，數(shù)據(jù)為0時(shí)直接移位
if(Data==1) //數(shù)據(jù)為1時(shí)，使dat加1來(lái)接收數(shù)據(jù)1
dat+=1;
while(Data); //等待數(shù)據(jù)線拉低
}
return dat;
}
/*------------------------------------------------
接收40bit數(shù)據(jù)
------------------------------------------------*/
void DHT11_receive() //接收40位的數(shù)據(jù)
{
uchar R_H,R_L,T_H,T_L,RH,RL,TH,TL,revise;
DHT11_start();
if(Data==0)
{
while(Data==0); //等待拉高
DHT11_delay_us(40); //拉高后延時(shí)80us
R_H=DHT11_rec_byte(); //接收濕度高八位
R_L=DHT11_rec_byte(); //接收濕度低八位
T_H=DHT11_rec_byte(); //接收溫度高八位
T_L=DHT11_rec_byte(); //接收溫度低八位
revise=DHT11_rec_byte(); //接收校正位
DHT11_delay_us(25); //結(jié)束
if((R_H+R_L+T_H+T_L)==revise) //校正
{
RH=R_H;
RL=R_L;
TH=T_H;
TL=T_L;
}
/*數(shù)據(jù)處理，方便顯示*/
rec_dat[0]='0'+(RH/10);
rec_dat[1]='0'+(RH%10);
rec_dat[2] =' ';
rec_dat[3] = 'R' ;
rec_dat[4] = 'H';
rec_dat[5]=' ';
rec_dat[6]=' ';
rec_dat[7]=' ';
rec_dat[8]=' ';
rec_dat[9]='0'+(TH/10);
rec_dat[10]='0'+(TH%10);
rec_dat[11] =' ';
rec_dat[12] = 'C';
rec_dat[13] = ' ' ;
rec_dat[14]=' ';
}
}
void timer0() interrupt 1
{
TH0 = 220;
TL0 = 220;//11.0592M晶振下占空比最大比值是256,輸出100HZ
pwm_t=pwm_t+1;
if(pwm_t == 255)
{ _4IN = 0;
led=1; }
if(pwm_motor_val == pwm_t)
{_4IN = 1;
led=0; }
}
/*------------------------------------------------
主函數(shù)
------------------------------------------------*/
void main(void)
{
uint i;
cmg88();//關(guān)數(shù)碼管，點(diǎn)陣函數(shù)
LCD_Init();
LCD_Clear();//清屏
DHT11_delay_ms(1500); //DHT11上電后要等待1S以越過(guò)不穩(wěn)定狀態(tài)在此期間不能發(fā)送任何指令
TMOD = 0x02;//8位自動(dòng)重裝模塊
// TH0 = 220;
// TL0 = 220;//11.0592M晶振下占空比最大比值是256,輸出100HZ
EA = 1;//總中斷允許
TR0 = 1;//啟動(dòng)定時(shí)器0
ET0 = 1;//允許定時(shí)器0中斷
while (1)
{
DHT11_receive();
for(i=0;i<15;i++)
{
LCD_Write_Char(i,1,rec_dat[i]);
}
//LCD_Write_Char(0,0,'T');
//LCD_Write_Char(0,1,'H');
//LCD_Write_String(0,1,"HELLO");
if(key_s3 == 0) //S2按下LED變暗
{
delay(5);
if(key_s3 == 0)
{
if(pwm_motor_val < 170)
{
pwm_motor_val=pwm_motor_val+10;
}
}
}
if(key_s2 == 0) //S3按鍵LED變亮
{
delay(5);
if(key_s2 == 0)
{
if(pwm_motor_val > 0)
{
pwm_motor_val=pwm_motor_val-10;
}
}
}
}
}

復(fù)制代碼

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