34． 带有存储器功用的数字温度计

unsignedcharcodedisplaybit[]={0xfe,0xfd,0xfb,0xf7,
0xef,0xdf,0xbf,0x7f};
unsignedcharcodedisplaycode[]={0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0x00};

unsignedcharcodedotcode[32]={0,3,6,9,12,16,19,22,
25,28,31,34,38,41,44,48,
50,53,56,59,63,66,69,72,
75,78,81,84,88,91,94,97};
sbitSDA=P1^6;
sbitSCL=P1^7;
unsignedchardisplaybuffer[8]={0,1,2,3,4,5,6,7};
unsignedchareepromdata[8];
unsignedchartemperdata[2];
unsignedchartimecount;
unsignedchardisplaycount;
bitsecondflag=0;
unsignedcharsecondcount=0;
unsignedcharretn;
unsignedintresult;
unsignedcharx;
unsignedintk;
unsignedintks;
voiddelay(void);
voiddelay10ms(void);
voidi_start(void);
voidi_stop(void);
voidi_init(void);
voidi_ack(void);
biti_clock(void);
biti_send(unsignedchari_data);
unsignedchari_receive(void);
bitstart_temperature_T(void);
bitread_temperature_T(unsignedchar*p);
voiddelay(void)
{
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
}
voiddelay10ms(void)
{
unsignedinti;
for(i=0;i<1000;i++)
{
delay();
}
}
voidi_start(void)
{
SCL=1;
delay();
SDA=0;
delay();
SCL=0;
delay();
}
voidi_stop(void)
{
SDA=0;
delay();
SCL=1;
delay();
SDA=1;
delay();
SCL=0;
delay();
}
voidi_init(void)
{
SCL=0;
i_stop();
}
voidi_ack(void)
{
SDA=0;
i_clock();
SDA=1;
}
biti_clock(void)
{
bitsample;
SCL=1;
delay();
sample=SDA;
_nop_();
_nop_();
SCL=0;
delay();
return(sample);
}
biti_send(unsignedchari_data)
{
unsignedchari;
for(i=0;i<8;i++)
{
SDA=(bit)(i_data&0x80);
i_data=i_data<<1;
i_clock();
}
SDA=1;
return(~i_clock());
}
unsignedchari_receive(void)
{
unsignedchari_data=0;
unsignedchari;
for(i=0;i<8;i++)
{
i_data*=2;
if(i_clock())i_data++;
}
return(i_data);
}
bitstart_temperature_T(void)
{
i_start();
if(i_send(0x90))
{
if(i_send(0xee))
{
i_stop();
delay();
return(1);
}
else
{
i_stop();
delay();
return(0);
}
}
else
{
i_stop();
delay();
return(0);
}
}
bitread_temperature_T(unsignedchar*p)
{
i_start();
if(i_send(0x90))
{
if(i_send(0xaa))
{
i_start();
if(i_send(0x91))
{
*(p+1)=i_receive();
i_ack();
*p=i_receive();
i_stop();
delay();
return(1);
}
else
{
i_stop();
delay();
return(0);
}
}
else
{
i_stop();
delay();
return(0);
}
}
else
{
i_stop();
delay();
return(0);
}
}
voidmain(void)
{
P1=0xff;
timecount=0;
displaycount=0;
TMOD=0x21;
TH1=0x06;
TL1=0x06;
TR1=1;
ET1=1;
ET0=1;
EA=1;
if(start_temperature_T())//向DS1624发送发动A/D温度转化指令，成功则发动T0守时1s。
{
secondflag=0;
secondcount=0;
TH0=55536/256;
TL0=55536%256;
TR0=1;
}
while(1)
{
if(secondflag==1)
{
secondflag=0;
TR0=0;
if(read_temperature_T(temperdata))//T0守时1s时刻到，读取DS1624的温度值
{
for(x=0;x<8;x++)
{
displaybuffer[x]=16;
}
x=2;
result=temperdata[1];//将读取的温度值进行数据处理，并送到显现缓冲区
while(result/10)
{
displaybuffer[x]=result%10;
result=result/10;
x++;
}
displaybuffer[x]=result;
result=temperdata[0];
result=result>>3;
displaybuffer[0]=(dotcode[result])%10;
displaybuffer[1]=(dotcode[result])/10;
if(start_temperature_T())//温度值数据处理完毕，从头发动DS1624开端温度转化
{
secondflag=0;
secondcount=0;
TH0=55536/256;
TL0=55536%256;
TR0=1;
}
}
}
}
}
voidt0(void)interrupt1using0//T0用于守时1s时刻到
{
secondcount++;
if(secondcount==100)
{
secondcount=0;
secondflag=1;
}
TH0=55536/256;
TL0=55536%256;
}
voidt1(void)interrupt3using0//T1守时1ms用数码管的动态改写
{
timecount++;
if(timecount==4)//T1守时1ms到
{
timecount=0;
if(displaycount==5)
{
P0=(displaycode[displaybuffer[7-displaycount]]|0x80);//在该位一起还要显现小数点
}
else
{
P0=displaycode[displaybuffer[7-displaycount]];
}
P2=displaybit[displaycount];
displaycount++;
if(displaycount==8)
{
displaycount=0;
}
}
}