这是我的一个项目
以下是代码；
#include <reg52.H>
#include <intrins.H>
#include <math.H>
#define uchar unsigned char
#define uint unsigned int
#define MotorData P1
sbit dula = P2^6;
sbit wela = P2^7;
sbit RS = P3^5;
sbit LCDEN = P3^4;
sbit buzzer = P2^3;
int w;
int a;
uchar phasecw[4] ={0x08,0x04,0x02,0x01};
uchar phaseccw[4]={0x01,0x02,0x04,0x08};
void delay(uint p)
{
while(p++);
}
void Delay_xms(uint x)
{
uint i,j;
for(i=0;i<x;i++)
for(j=0;j<112;j++);
}
void MotorCW(void)
{
uchar i;
uchar f;
for(f=0;f<60;f++)
{
for(i=0;i<4;i++)
{
MotorData=phasecw[i];
Delay_xms(4);
}
}
}
void MotorCCW(void)
{
uchar i;
uchar f;
for(f=0;f<60;f++)
{
for(i=0;i<4;i++)
{
MotorData=phaseccw[i];
Delay_xms(4);
}
}
}
void MotorStop(void)
{
MotorData=0x00;
}
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);
}
//D′êy?Y:RS=1, RW=0;
void writeData(uchar dat)
{
RS = 1;
P0 = dat;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);
}
void init()
{
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); //′óóú0?ó0.5, D?óú0??0.5
return value;
}
void bijiao()
{
int i,j,c;
i=getTmpValue();
i=i/100;
delay(50);
j=getTmpValue();
j=j/100;
c=getTmpValue();
a=i-j;
if(a>0)
{
MotorCW();
Delay_xms(100);
MotorStop();
}
if(a<0)
{
MotorCCW();
Delay_xms(100);
MotorStop();
}
}
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)
{
w=getTmpValue();
if(w>=3000)
{ bijiao();}
delayMs(1000); //???è×a??ê±??Dèòa750msò?é?
writeComm(0xc0);
display(getTmpValue());
sendChangeCmd();
}
}
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