📄 14-2.c
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#include <reg51.h>
#include <intrins.h>
sbit RST = P2^0;
sbit CLK = P2^1;
sbit DQ = P2^2;
sbit TSOR = P2^3;
sbit ALERT =P2^4;
sbit RS = P2^7;
sbit RW = P2^6;
sbit EN = P2^5;
/*------------------------------------------全局变量-------------------------------------------------------*/
static unsigned char temp1,temp2; //温度值的整数部分、小数部分
static unsigned char pos,posset; //数字电位器电位值、设定值
static unsigned char min,sec; //分钟、秒
static unsigned char count; //Timer0中断计数
static unsigned char minset; //设定的分钟数
static unsigned char status1,status2; //状态标志
bit stop,timeover; //定时停止、结束
static char line0[] =" 00:00 ";
static char line1[] =" . C W";
/*-------------------------------------------------------------------------------------------------------------*/
void InitInterupt();
void KeyboardDelay();
/*-------------------------------------------LCD驱动函数------------------------------------------------*/
void DelayL();
void DelayS();
void WriteCommand(unsigned char c);
void WriteData(unsigned char c);
void ShowChar(unsigned char pos,unsigned char c);
void ShowString(unsigned char line,char *ptr);
void InitLcd();
/*----------------------------------------------键盘-程序--------------------------------------------------*/
unsigned char GetKey();
/*---------------------------------------------数字温度计驱动-------------------------------------------*/
void ChangePos(bit sel,unsigned char pos1,unsigned char pos2);
/*------------------------------------------温度传感器驱动----------------------------------------------*/
void Delay15();
void Delay60();
void Delay100ms();
void Write0TS();
void Write1TS();
bit ReadTS();
void ResetTS();
void WriteByteTS(unsigned char byte);
unsigned char ReadByteTS();
void InitTS();
void GetTempTS();
/*-------------------------------------------------主程序---------------------------------------------------*/
void main (void) {
char code str1[] =" Hello World! ";
char code str2[] =" 2002-10-20 ";
unsigned char i;
SP=0x50;
ALERT=0; //报警灯灭
TSOR=1; //1-wire总线释放
DelayL();
InitLcd(); //初始化LCD
DelayL();
ShowString(0,str1); //启动画面
ShowString(1,str2);
for(i=0;i<15;i++)
Delay100ms();
InitInterupt(); //初始化中断设置
minset=10; //缺省定时10分钟
posset=0; //缺省电位器值0
min=minset; //初始化数据
pos=posset;
sec=0;
count=0;
P1=0xF0;
status1=0;
status2=0;
stop=1;
timeover=0;
ChangePos(0,255-pos,255-pos); //设置电位器
InitTS(); //初始化温度计
while(1) //循环显示温度值
{
GetTempTS();
line1[0]=0x20;
i=temp1;
if(i>39) //超过40摄氏度，告警灯亮
ALERT=1;
if(i>99) //超过100摄氏度，显示温度的百位
{
line1[0]=0x31;
i-=100;
}
line1[1]=i/10+0x30; //显示温度的十位
line1[2]=i%10+0x30; //显示个位
line1[4]=temp2+0x30; //显示小数位
if(timeover) //若定时结束，则电位器缓慢复0
{
for(;pos>0;pos--)
{
ChangePos(0,255-pos,255-pos);
_nop_();
_nop_();
}
timeover=0;
posset=0;
}
if(pos>posset) //若按键修改电位器位置
{
for(;pos>posset;pos--) //则缓变到设定值
{
ChangePos(0,255-pos,255-pos);
_nop_();
_nop_();
}
ChangePos(0,255-pos,255-pos);
}
else if(pos<posset)
{
for(;pos<posset;pos++)
{
ChangePos(0,255-pos,255-pos);
_nop_();
_nop_();
}
ChangePos(0,255-pos,255-pos);
}
i=pos;
line1[9]=0x20; //显示电位器等级值
if(i>99)
{
line1[9]=i/100+0x30;
i=i%100;
}
line1[10]=i/10+0x30;
line1[11]=i%10+0x30;
ShowString(1,line1);
line0[5]=min/10+0x30; //显示时间
line0[6]=min%10+0x30;
line0[8]=sec/10+0x30;
line0[9]=sec%10+0x30;
ShowString(0,line0);
Delay100ms();
}
}
void InitInterupt()
{
TMOD=0x21; //初始化中断设置
TL1=0xFD;
TH1=0xFD;
PX0=1;
EA=1;
ES=1;
PCON=0;
TR1=1;
SCON=0x50;
TL0=0x00; //定时0.05m
TH0=0x4C;
ET0=1;
EX0=1;
IT0=1;
}
void KeyboardDelay() //按键中断延时
{
unsigned char i,j;
i=0x40;
j=0xFF;
while(i--)
while(j--);
}
/*--------------------------------------------中断处理-----------------------------------------------------*/
Int0_process() interrupt 0 using 0
{
unsigned char key;
unsigned char keycode[]= "TP";
unsigned char step[3]={1,2,5};
EA=0;
key=GetKey(); //获得按键值
switch(key)
{
case 0:
stop=!stop;
min=minset;
sec=0;
break;
case 1:
case 2:
case 3:
if(stop)
{
minset+=step[key-1];
if(minset>60)
minset=0;
min=minset;
}
break;
case 5:
case 6:
case 7:
if(stop)
{
minset-=step[key-5];
if(minset>60)
minset=0;
min=minset;
}
break;
case 9:
case 10:
case 11:
posset+=step[key-9];
break;
case 13:
case 14:
case 15:
posset-=step[key-13];
break;
default:
break;
}
TR0=!stop;
KeyboardDelay();
P1=0xF0;
EA=1;
}
Timer0_process() interrupt 1 using 0
{
EA=0;
TR0=0;
TL0=0x00;
TH0=0x4C;
count++;
if(count==20) //如果到累计定时到达1s
{
if(sec==0) //定时处理
{
if(min==0) //总定时到，则置结束标志
timeover=1;
else
{
min--;
sec=59;
}
}
else
sec--;
count=0;
}
TR0=1;
EA=1;
}
/*--------------------------------------LCD驱动子程序--------------------------------------------------*/
void DelayL()
{unsigned char i,j;
i=0xF0;
j=0xFF;
while(i--)
while(j--);
}
void DelayS()
{
unsigned char i;
i=0x1F;
while(i--);
}
void WriteCommand(unsigned char c)
{
DelayS();
EN=0;
RS=0;
RW=0;
_nop_();
EN=1;
P0=c;
EN=0;
}
void WriteData(unsigned char c)
{
DelayS();
EN=0;
RS=1;
RW=0;
_nop_();
EN=1;
P0=c;
EN=0;
RS=0;
}
void ShowChar(unsigned char pos,unsigned char c)
{
unsigned char p;
if(pos>=0x10)
p=pos+0xB0;
else
p=pos+0x80;
WriteCommand(p);
WriteData(c);
}
void ShowString(unsigned char line,char *ptr)
{
unsigned char l,i;
l=line<<4;
for(i=0;i<16;i++)
ShowChar(l++,*(ptr+i));
}
void InitLcd()
{
DelayL();
WriteCommand(0x38);
WriteCommand(0x38);
WriteCommand(0x06);
WriteCommand(0x0C);
WriteCommand(0x01);
WriteCommand(0x80);
}
/*---------------------------------------------键盘子程序-------------------------------------------------*/
unsigned char GetKey()
{
unsigned k,t,i,j;
k=P1;
k=k&0xF0;
i=0;
while((k&0x10)&&i<4)
{
i++;
k=k>>1;
}
k=0x01;
j=0;
while(j<4)
{
P1=0xFF^k;
_nop_();
t=P1;
t=t^0xFF;
t=t&0xF0;
if(t)
break;
j++;
k=k<<1;
}
k=j*4+i;
return k;
}
/*-----------------------------------------数字温度计驱动子程序--------------------------------------*/
void ChangePos(bit sel,unsigned char pos1,unsigned char pos2)
{ unsigned char i;
RST=0;
DQ=0;
CLK=0;
RST=1;
DQ=sel;
_nop_();
CLK=1;
_nop_();
CLK=0;
for(i=0;i<8;i++)
{
if(pos1&0x80)
DQ=1;
else
DQ=0;
_nop_();
CLK=1;
_nop_();
CLK=0;
pos1=pos1<<1;
}
for(i=0;i<8;i++)
{
if(pos2&0x80)
DQ=1;
else
DQ=0;
_nop_();
CLK=1;
_nop_();
CLK=0;
pos2=pos2<<1;
}
RST=0;
}
/*------------------------------------------温度传感器子程序-------------------------------------------*/
void Delay100ms() //延时100ms
{
unsigned char i,j,k;
for(i=0;i<8;i++)
for(j=0;j<25;j++)
for(k=0;k<250;k++);
}
void Delay15() //延时15us
{
unsigned char i;
for(i=0;i<8;i++);
}
void Delay60() //延时60us
{
unsigned char i;
for(i=0;i<30;i++);
}
void Write0TS() //写bit 0
{
TSOR=1;
TSOR=0;
Delay15();
Delay15();
Delay15();
Delay15();
TSOR=1;
_nop_();
_nop_();
}
void Write1TS() //写bit 1
{
TSOR=1;
TSOR=0;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
TSOR=1;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
Delay15();
Delay15();
Delay15();
}
bit ReadTS()
{
bit b;
TSOR=1;
TSOR=0;
_nop_();
_nop_();
_nop_();
_nop_();
TSOR=1;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
b=TSOR;
Delay15();
Delay15();
Delay15();
_nop_();
_nop_();
return b;
}
void ResetTS() //复位
{unsigned char i;
TSOR=1;
TSOR=0;
for(i=0;i<8;i++)
Delay60();
TSOR=1;
while(TSOR);
for(i=0;i<8;i++)
Delay60();
}
void WriteByteTS(unsigned char byte) //写一个字节（byte）
{unsigned char i;
for(i=0;i<8;i++)
{
if(byte&0x01)
Write1TS();
else
Write0TS();
byte=byte>>1;
}
}
unsigned char ReadByteTS() //读一个字节（byte）
{
unsigned char i,j;
bit b;
j=0;
for(i=0;i<8;i++)
{
b=ReadTS();
if(b)
j+=1;
j=_cror_(j,1);
}
return j;
}
void InitTS() //初始化温度转换
{
ResetTS();
WriteByteTS(0xCC);
WriteByteTS(0x4E);
WriteByteTS(0x64);
WriteByteTS(0x8A);
WriteByteTS(0x1F);
}
void GetTempTS() //获取温度
{
ResetTS();
WriteByteTS(0xCC);
WriteByteTS(0x44);
Delay100ms();
ResetTS();
WriteByteTS(0xCC);
WriteByteTS(0xBE);
temp2=ReadByteTS();
temp1=ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
temp1=temp1<<4;
temp1+=(temp2&0xF0)>>4;
temp2=(temp2&0x0F)?5:0;
}
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