發(fā)送:
include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar temp1,temp2,temp,A;
uchar sb[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0xBf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};
sbit DQ=P3^7;
void delay(uint t)
{
uint j,k;
for(j=t;j>0;j--)
for(k=115;k>0;k--);
}
void display_1820(uchar x)
{
uint i,ge,shi,xiao;
shi=(x/10);
ge=(x%10);
xiao=(x%10/10);
P0=sb[i];
for(i=0;i<4;i++)
{
if(i==0){P0=0x00;P0=sb[shi];P2=0xfd;delay(1);}
if(i==0){P0=0x00;P0=sb[ge]|0x80;P2=0xfb;delay(1);}
if(i==0){P0=0x00;P0=sb[xiao];P2=0xf7;delay(1);}
}
}
void delay_18b20(uint i)
{
for(;i>0;i--);
}
void init()
{
uchar x=0;
DQ=1;
delay_18b20(8);
DQ=0;
delay_18b20(80);
DQ=1;
delay_18b20(14);
x=DQ;
delay_18b20(20);
}
uchar read()
{
uchar i=0;
uchar dat=0;
for(i=8;i>0;i--)
{
DQ=0;
dat>>=1;
DQ=1;
if(DQ)dat|=0x80;
delay_18b20(4);
}
return dat;
}
void write(uchar dat)
{
uchar i=0;
for(i=8;i>0;i--)
{
DQ=0;
DQ=dat&0x01;
delay_18b20(5);
DQ=1;
dat>>=1;
}
}
uchar read1()
{
uchar a=0,b=0,t=0;
init();
write(0xcc);
write(0x44);
delay_18b20(100);
init();
write(0xcc);
write(0xbe);
delay_18b20(100);
a=read();
b=read();
temp1=b<<8;
temp1+=(a&0x63)>>4;
temp2=a&0x63;
temp=((b*256+a)>>4);
return temp;
}
void UART_Init()
{
TMOD&=0x63;
TMOD|=0x20;
TR1=1;
TH1=0xF3;
TL1=0xF3;
SCON=0x50;
PCON|=0x80;
ES=1;
EA=1;
}
void UART_SendByte(unsigned char Byte)
{
SBUF=Byte;
while(TI==0);
TI=0;
}
/*1ms=1,±1ms*/void delay_1ms(unsigned int _1ms){_1ms*=110;while(_1ms--){}}
void main()
{
UART_Init();
while(1)
{
delay_1ms(5);
//A=read1();
UART_SendByte(read1());
//display_1820(read1());
}
}
void UART_Routine() interrupt 4
{
if(RI==1)
{
P2=~SBUF;
UART_SendByte(SBUF);
RI=0;
}
}
接受:#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar temp1,temp2,temp,A;
uchar sb[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0xBf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};
sbit DQ=P3^7;
void delay(uint t)
{
uint j,k;
for(j=t;j>0;j--)
for(k=115;k>0;k--);
}
void display_1820(uchar x)
{
uint i,ge,shi,xiao;
shi=(x/10);
ge=(x%10);
xiao=(x%10/10);
P0=sb[i];
for(i=0;i<4;i++)
{
if(i==0){P0=0x00;P0=sb[shi];P2=0xfd;delay(1);}
if(i==0){P0=0x00;P0=sb[ge]|0x80;P2=0xfb;delay(1);}
if(i==0){P0=0x00;P0=sb[xiao];P2=0xf7;delay(1);}
}
}
void delay_18b20(uint i)
{
for(;i>0;i--);
}
void init()
{
uchar x=0;
DQ=1;
delay_18b20(8);
DQ=0;
delay_18b20(80);
DQ=1;
delay_18b20(14);
x=DQ;
delay_18b20(20);
}
uchar read()
{
uchar i=0;
uchar dat=0;
for(i=8;i>0;i--)
{
DQ=0;
dat>>=1;
DQ=1;
if(DQ)dat|=0x80;
delay_18b20(4);
}
return dat;
}
void write(uchar dat)
{
uchar i=0;
for(i=8;i>0;i--)
{
DQ=0;
DQ=dat&0x01;
delay_18b20(5);
DQ=1;
dat>>=1;
}
}
uchar read1()
{
uchar a=0,b=0,t=0;
init();
write(0xcc);
write(0x44);
delay_18b20(100);
init();
write(0xcc);
write(0xbe);
delay_18b20(100);
a=read();
b=read();
temp1=b<<4;
temp1+=(a&0x63)>>4;
temp2=a&0x63;
temp=((b*256+a)>>4);
return temp;
}
void UART_Init()
{
TMOD&=0x63;
TMOD|=0x20;
TR1=1;
TH1=0xF3;
TL1=0xF3;
SCON=0x50;
PCON|=0x80;
ES=1;
EA=1;
}
void UART_SendByte(unsigned char Byte)
{
SBUF=Byte;
while(TI==0);
TI=0;
}
uchar rcv_date;
void main()
{
UART_Init();
while(1)
{
//A=read1();
//UART_SendByte(read1());
display_1820(rcv_date);
}
}
void UART_Routine() interrupt 4
{
if(RI==1)
{
rcv_date=SBUF;
//UART_SendByte(SBUF);
RI=0;
}
} |
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