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想知道为什么无法运行
#include<reg51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define delayNOP() {_nop_();_nop_();_nop_();_nop_();}
sbit HI_LED=P2^3; //高温，低温白净闪烁 LED
sbit LO_LED=P2^6;
sbit DQ=P3^3; //DS18B20数据线
sbit BEEP=P3^7; //报警
sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;
sbit K1=P1^7; //正常显示温度，越界时报警
sbit K2=P1^4; //显示报警温度
sbit K3=P1^1; //查看 ROM CODE
uchar code RomCodeStr[]={"-- ROM CODE --"};
uchar RomCode[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; //64位ROM CODE
uchar code Temp_Disp_Title[] ={"Current Temp: "};
uchar Current_Temp_Display_Buffer[]={"TEMPE: "};
uchar code Temperature_Char[8]={0x0c,0x12,0x12,0x0c,0x00,0x00,0x00,0x00}; //温度示字符
uchar code Alarm_Temp[]={"ALARM TEMP Hi Lo"};
uchar Alarm_HI_LO_STR[]={"Hi: Lo: "};
uchar temp_data[2]={0x00,0x00};
uchar temp_alarm[2]={0x00,0x00};
uchar display[5]={0x00,0x00,0x00,0x00,0x00,}; //温度值
uchar display1[3]={0x00,0x00,0x00}; //温度报警值
uchar code df_Table[]={0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9}; //温度小数位对照表
//.......................................................
//报警温度上下限（取值范围：-128~+127）（DS18B20温度范围为：-55~+125）
//数组中前一位为高温值，后一位为低温值
//此处类型注意设为char,否则不能进行有符号数的比较
char Alarm_Temp_HL[2]={70,-20};
//............................................................
uchar CurrentT=0; //当前读取温度整数部分
uchar Temp_Value[]={0x00,0x00};//从DS18B20读取的温度值
uchar Display_Digit[]={0,0,0,0};//待显示的各温度数位
bit HI_Alarm=0,LO_Alarm=0; //高低温报警标志
bit DS18B20_IS_OK=1; //传感器正常标志
uint Time0_Count=0; //定时器延时累加
//...........................
//延时
//...........................
void DelayXus(int x)
{
uchar i;
while(x--)for(i=0;i<200;i++);
}
//.......................................
//忙检测
bit LCD_Busy_Check()
{
bit LCD_Status;
RS=0;//寄存器选择
RW=1;//读状态寄存器EN=1;//开始读
DelayXus(1);
LCD_Status=(bit)(P0&0x80) ;
EN=0;
return LCD_Status;
}
//写LCD指令
void Write_LCD_Command(uchar cmd)
{
while((LCD_Busy_Check()&0x80)==0x80); //忙等待
RS=0; //写选择命令寄存器
RW=0; //写
EN=0;
P0=cmd; EN=1; DelayXus(1); EN=0;
}
//向LCD写数据
void Write_LCD_Data(uchar dat)
{
while((LCD_Busy_Check()&0x80)==0x80); //忙等待
RS=1;RW=0;EN=0;P0=dat;EN=1; DelayXus(1); EN=0;
}
//设置液晶显示位置
void Set_LCD_POS(uchar pos)
{
Write_LCD_Command(pos |0x80);
}
//LCD初始化
void LCD_Initialise()
{
Write_LCD_Command(0x38);
DelayXus(1);
Write_LCD_Command(0x01); //清屏
DelayXus(1);
Write_LCD_Command(0x06); //字符进入模式：屏幕不动，字符后移
DelayXus(1);
Write_LCD_Command(0x0C); //显示开，关光标
DelayXus(1);
}
//...............................................
//..........................................
//自定义字符写CGRAM
//..................................
void Write_NEW_LCD_Char()
{
uchar i;
Write_LCD_Command(0x40); //写CGRAM
for(i=0;i<8;i++)
Write_LCD_Data(Temperature_Char[i]); //写入温度符号
}
//............................................
//延时
//........................................................
void Delay(uint num)
{
while(--num);
}
//...............................................
//初始化DS18B20
//...............................................
uchar Init_DS18B20()
{
uchar status;
DQ=1;Delay(8);
DQ=0;Delay(90);
DQ=1;Delay(8);
status=DQ;
Delay(100);
DQ=1;
return status; //初始化成功时返回0
}
//...............................................
//读一节
//...............................................
uchar ReadOneByte()
{
uchar i,dat=0;
DQ=1;_nop_();
for(i=0;i<8;i++)
{
DQ=0;dat>>=1;DQ=1;_nop_(); _nop_();
if(DQ) dat |=0x80;Delay(30);DQ=1;
}
return dat;
}
//...............................................
//写一字节
//...............................................
void WriteOneByte(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
DQ=0;DQ=dat&0x01;Delay(5);DQ=1;dat>>=1;
}
}
//...............................................
//读取温度值
//...............................................
void Read_Temperature()
{
if(Init_DS18B20()==1) //DS18B20故障
DS18B20_IS_OK=0;
else
{
WriteOneByte(0xCC); //跳过序列号
WriteOneByte(0x44); //启动温度转换
Init_DS18B20();
WriteOneByte(0xCC); //跳过序列号
WriteOneByte(0xBE); //读取温度寄存器
Temp_Value[0]=ReadOneByte(); //温度低8位
Temp_Value[1]=ReadOneByte(); //温度高8位
Alarm_Temp_HL[0]=ReadOneByte(); //报警温度TH
Alarm_Temp_HL[1]=ReadOneByte(); //报警温度TL
DS18B20_IS_OK=1;
}
}
//...............................................
//设置DS18B20温度报警值
//...............................................
void Set_Alarm_Temp_Value()
{
Init_DS18B20();
WriteOneByte(0xCC); //跳过序列号
WriteOneByte(0x4E); //将设定的温度报警值写入DS18B20
WriteOneByte(Alarm_Temp_HL[0]); //写TH
WriteOneByte(Alarm_Temp_HL[1]); //写TL
WriteOneByte(0x7F); //12位精度
Init_DS18B20();
WriteOneByte(0xCC); //跳过序列号
WriteOneByte(0x48); //温度报警值存入DS18B20
}
//......................................................
//在LCD上显示当前温度
//.....................................................
void Display_Temperature()
{
uchar i;
uchar t=150; //延时值
uchar ng=0; //负数标识
char Signed_Current_Temp;
//如果为负数则取反加1，并设置负数标识
if((Temp_Value[1]&0xF8)==0xF8)
{
Temp_Value[1]=~Temp_Value[1];
Temp_Value[0]=~Temp_Value[0]+1;
if(Temp_Value[0]==0x00) Temp_Value[1]++;
ng=1; //设负数标识
}
//查表得到温度小数部分
Display_Digit[0]=df_Table[Temp_Value[0]&0x0F];
//获取温度整数部分（无符号）
CurrentT=((Temp_Value[0]&0xF0)>>4)|((Temp_Value[1]&0x07)<<4);
//有符号的当前温度值，注意此处定义为char, 其值可为-128~+127
Signed_Current_Temp=ng?-CurrentT:CurrentT;
//高低温报警标志设置（与定义为char类型的Alarm_Temp_HL比较，这样可区分正负比较）
HI_Alarm=Signed_Current_Temp>=Alarm_Temp_HL[0]?1:0;
LO_Alarm=Signed_Current_Temp<=Alarm_Temp_HL[1]?1:0;
//将整数部分分解为三位待显示数字
Display_Digit[3]=CurrentT/100;
Display_Digit[2]=CurrentT%100/10;
Display_Digit[1]=CurrentT%10;
//刷新LCD显示缓冲
Current_Temp_Display_Buffer[11]=Display_Digit[0]+'0';
Current_Temp_Display_Buffer[10]='.';
Current_Temp_Display_Buffer[9]=Display_Digit[1]+'0';
Current_Temp_Display_Buffer[8]=Display_Digit[2]+'0';
Current_Temp_Display_Buffer[7]=Display_Digit[3]+'0';
//高位为0时不显示
if(Display_Digit[3]==0) Current_Temp_Display_Buffer[7]=' ';
//高位为0且次高位为0时，次高位不显示
if(Display_Digit[2]==0&&Display_Digit[3]==0)
Current_Temp_Display_Buffer[8]=' ';
//负数符号显示恰当位置
if (ng)
{
if(Current_Temp_Display_Buffer[8]==' ')
Current_Temp_Display_Buffer[8]='_';
else
if(Current_Temp_Display_Buffer[7]==' ')
Current_Temp_Display_Buffer[7]='_';
else
Current_Temp_Display_Buffer[6]='_';
}
//在第一行显示标题
Set_LCD_POS(0X00);
for(i=0;i<16;i++) Write_LCD_Data( Temp_Disp_Title[i]);
//在第二行显示当前温度
Set_LCD_POS(0X40);
for(i=0;i<16;i++) Write_LCD_Data(Current_Temp_Display_Buffer[i]);
//显示温度符号
Set_LCD_POS(0X4D);Write_LCD_Data(0x00);
Set_LCD_POS(0X4E);Write_LCD_Data('C');
}
//.....................................
//定时器中断，控制报警声音
//.................................
void T0_INT() interrupt 1
{
TH0=-1000/256;
TL0=-1000%256;
BEEP=!BEEP;
if(++Time0_Count==400)
{
Time0_Count=0;
if(HI_Alarm) HI_LED=~HI_LED; else HI_LED=0;
if(LO_Alarm) LO_LED=~LO_LED; else LO_LED=0;
TR0=0;
}
}
//...............................................
//ROM CODE转换与显示
//.....................................................
void Display_Rom_Code()
{
uchar i,t;
Set_LCD_POS(0x40);
for(i=0;i<8;i++)
{
t=((RomCode[i]&0xF0)>>4);
if(t>9) t+=0x37;else t+='0';
Write_LCD_Data(t); //高位数显示
t=RomCode[i]&0x0F;
if(t>9) t+=0x37;else t+='0';
Write_LCD_Data(t); //低位数显示
}
}
//..................................
//读64位序列码
//...............................
void Read_Rom_Code()
{
uchar i;
Init_DS18B20();
WriteOneByte(0x33); //读序列码
for (i=0;i<8;i++) RomCode[i]=ReadOneByte();
}
//.........................................
//显示ROM CODE
//...............................
void Display_RomCode()
{
uchar i;
Set_LCD_POS(0x00);
for(i=0;i<16;i++) //显示标题
Write_LCD_Data(RomCodeStr[i]);
Read_Rom_Code(); //读64位序列码
Display_Rom_Code(); //显示64位ROM CODE
}
//.......................................
//显示报警温度
//...............................................
void Disp_Alarm_Temperature()
{
uchar i,ng;
//显示Alarm_Temp_HL数组中的报警温度值
//由于Alarm_Temp_HL类型为char，故可以直接进行正负比较
//高温报警值.........................
ng=0;
if(Alarm_Temp_HL[0]<0) //如果为负数则取反加1
{
Alarm_Temp_HL[0]=~Alarm_Temp_HL[0]+1;
ng=1;
}
//分解高温各数位到待显示串中
Alarm_HI_LO_STR[4]=Alarm_Temp_HL[0]/100+'0';
Alarm_HI_LO_STR[5]=Alarm_Temp_HL[0]/10%10+'0';
Alarm_HI_LO_STR[6]=Alarm_Temp_HL[0]%10+'0';
//屏蔽高位不显示的0
if(Alarm_HI_LO_STR[4]=='0') Alarm_HI_LO_STR[4]=' ';
if(Alarm_HI_LO_STR[4]==' '&& Alarm_HI_LO_STR[5]=='0')
Alarm_HI_LO_STR[5]=' ';
//"-"符号显示
if (ng)
{
if (Alarm_HI_LO_STR[5]==' ') Alarm_HI_LO_STR[5]='-';
else
if(Alarm_HI_LO_STR[4]==' ') Alarm_HI_LO_STR[4]='-';
else
Alarm_HI_LO_STR[3]='-';
}
//低温报警值
ng=0;
if(Alarm_Temp_HL[1]<0) //如果为负数则取反加1
{
Alarm_Temp_HL[1]=~Alarm_Temp_HL[1]+1;
ng=1;
}
//分解低温各数位到待显示串中
Alarm_HI_LO_STR[12]=Alarm_Temp_HL[1]/100+'0';
Alarm_HI_LO_STR[13]=Alarm_Temp_HL[0]/10%10+'0';
Alarm_HI_LO_STR[14]=Alarm_Temp_HL[0]%10+'0';
//屏蔽高位不显示的0
if(Alarm_HI_LO_STR[12]=='0') Alarm_HI_LO_STR[12]=' ';
if(Alarm_HI_LO_STR[12]==' '&& Alarm_HI_LO_STR[13]=='0')
Alarm_HI_LO_STR[13]=' ';
//"-"符号显示
if (ng)
{
if (Alarm_HI_LO_STR[13]==' ') Alarm_HI_LO_STR[13]='-';
else
if(Alarm_HI_LO_STR[12]==' ') Alarm_HI_LO_STR[12]='-';
else
Alarm_HI_LO_STR[11]='-';
}
//显示高低温报警温度值
Set_LCD_POS(0x00); //显示标题
for (i=0;i<16;i++) Write_LCD_Data(Alarm_Temp[i]);
Set_LCD_POS(0x40); //显示高低温
for (i=0;i<16;i++) Write_LCD_Data(Alarm_HI_LO_STR[i]);
}
//................................
//主函数
//..................................
void main()
{
uchar Current_Operation=1; //默认当前操作为显示温度
LCD_Initialise();
IE=0x82;
TMOD=0x01;
TH0=-1000/256;
TL0=-1000%256;
TR0=0;
HI_LED=0;
LO_LED=0;
Set_Alarm_Temp_Value();
Read_Temperature();
Delay(50000);
Delay(50000);
while(1)
{
if (K1==0) Current_Operation=1;
if (K2==0) Current_Operation=2;
if (K3==0) Current_Operation=3;
switch (Current_Operation)
{
case 1://正常显示当前温度，越界时报警
Read_Temperature();
if( DS18B20_IS_OK)
{
if (HI_Alarm==1 || LO_Alarm==1) TR0=1;
else TR0=0;
Display_Temperature();
}
DelayXus(100);
break;
case 2: //显示报警温度上下限
Read_Temperature();
Disp_Alarm_Temperature();
DelayXus(100);
break;
case 3: //显示DS18B20 ROM CODE
Display_RomCode();
DelayXus(50);
break;
}
}
}
程序如上
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