基于89S51的实时数字温度计(DS1302 18B20)

取1Byte数据
{
uchar i;
uchar temp=0;

for(i=0; i<8;i++)
{
C_CLK;
if(DS_IO!=0) temp|=(1S_CLK;
}
return(temp);
}

void RW_DS1302(uchar reg, uchar byte)//向DS1302寄存器写数据
{
C_RST;
C_CLK;
S_RST;
DS1302_InputByte(reg);
DS1302_InputByte(byte);
S_CLK;
C_RST;
}

uchar Read_DS1302(uchar reg)//从DS1302寄存器读数据
{
uchar byte;
C_RST;
C_CLK;
S_RST;
DS1302_InputByte(reg);
byte = DS1302_OutputByte();
S_CLK;
C_RST;
return(byte);
}

void GetTime_DS1302(uchar *ucCurtime) //读取DS1302当前时间
{

ucCurtime[0] = Read_DS1302(0x81);//格式为: 秒 分 时
ucCurtime[1] = Read_DS1302(0x83);
ucCurtime[2] = Read_DS1302(0x85);
}

void Set_Time(uchar *receive) //写时间
{
Write_Enable; //控制命令,允许写操作

RW_DS1302(0x80,receive[0]);
RW_DS1302(0x82,receive[1]);
RW_DS1302(0x84,receive[2]);

Write_Disable; // 控制命令,写保护
}

/********************************************************
* *
* 数码管显示程序段 *
* *
********************************************************/
void deal(void)//送显前的数据处理
{uint timer2;
uint lstemp;
timer2++;

if(STA)
{GetTime_DS1302(collect_time);}
if(flash)//用于闪动效果的控制的
{
display[0] = num[sg];
display[1] = num[sd];
display[2] = num[fg];
display[3] = num[fd];
display[4] = num[mg];
display[5] = num[md];
}
else
{switch(choose)
{
case 1:display[0]=0;break;
case 2:display[1]=0;break;
case 3:display[2]=0;break;
case 4:display[3]=0;break;
case 5:display[4]=0;break;
case 6:display[5]=0;break;
}
}
if(timer2==3000)//间断性获取温度
{
timer2=0;
if(STA)
{TR0=0;
Ds18b20_ReadEE();
TR0=1;
}
}
if(collect_temperature[1]>127)
{
collect_temperature[0]=255-collect_temperature[0];
collect_temperature[1]=255-collect_temperature[1];
}
lstemp=((collect_temperature[0])>>4)|((collect_temperature[1])<4);

display[6] = num[(uchar)((lstemp)/10)];
display[7] = num[(uchar)((lstemp)%10)];

}

/********************************************************
* *
* 按键控制程序段 *
* *
********************************************************/

void Scan(void)
{

if(SET==0&&keyboard==1) //检测设置键有无按下，并进行相应操作
{
if(SET==0&&keyboard==1)
{ RdefineT1; //超时检测初始化
choose++;

while(SET==0);
if(choose==7)
{TR0=0;
Set_Time(collect_time);
TR0=1;
STA=1; //设置完毕，重新开始采集时间
choose=0;
}
}
}

if(choose) //只有在时间调整时，加减按键才有作用
{
if(ADD==0&&keyboard==1) //检测加调整键有无按下，并进行相应操作
{
if(ADD==0&&keyboard==1)
{ RdefineT1; //超时检测初始化a=0
TR0=0;
switch(choose)
{
case 1 :if(sg==2)
collect_time[2] = collect_time[2]&0x0f;
else {collect_time[2]+=16;}
break;
case 2 :if((sg<2)&&(sd==9))
collect_time[2] &= 0x30;
if((sg>=2)&&(sd==3))
collect_time[2] &= 0x30;
else {collect_time[2]++;}
break;
case 3: if(fg==5)
collect_time[1] &= 0x0f;
else {collect_time[1]+=16;}
break;
case 4: if(fd==9)
collect_time[1] &= 0xf0;
else {collect_time[1]++;}
break;
case 5: if(mg==5)
collect_time[0] &= 0x0f;
else {collect_time[0]+=16;}
break;
case 6: if(md==9)
collect_time[0] &= 0xf0;
else {collect_time[0]++;}
break;
}
TR0=1;
while(ADD==0);
}
}

if(DEC==0&&keyboard==1) //检测减调整键有无按下，并进行相应操作
{
if(DEC==0&&keyboard==1)
{ RdefineT1; //超时检测初始化

TR0=0;
switch(choose)
{
case 1 :if(sg==0)
collect_time[2]=0x20;
else collect_time[2]-=16;
break;
case 2 :if(sg<2&&sd==0)
collect_time[2] |= 0x09;
if(sg==2&&sd==0)
collect_time[2] |= 0x03;
else collect_time[2]-=1;
break;
case 3 :if(fg==0)
collect_time[1] |= 0x50;
else collect_time[1]-=16;
break;
case 4 :if(fd==0)
collect_time[1] |= 0x09;
else collect_time[1]-=1;
break;
case 5 :if(mg==0)
collect_time[0] |= 0x50;
else collect_time[0]-=16;
break;
case 6 :if(md==0)
collect_time[0] |= 0x09;
else collect_time[0]-=1;
break;
}
TR0=1;
while(DEC==0);
}
}
}

if(choose!=0){TR1=1;STA=0;} //在设置模式下停止采集时间
else {TR1=0;STA=1;}
}

/********************************************************
* *
* AT89S51主程序段 *
* *
********************************************************/
void main(void)
{
Time01_Int();
Dat_Int();

EA = 1; //开中断