数字卡尺单片机电路及程序

ID:198598 · 发表于 2017-5-9 13:49

MAIN.C

#include<reg52.h>
#include<Ruler.h>//调用卡尺驱动程序
unsigned char Styles;//模式(0:mm 1:inch)
unsigned char Sign;//正负号(0:正 1:负)
sfr AUXR = 0x8E; //辅助寄存器
void Init_Com()//串口初始化 9600/n/8/1 MCU:STC12C2052
{
AUXR = AUXR|0x40; // T1, 1T Mode
TMOD = 0x20;
SCON = 0x50;
TH1 = 0xDC;
TL1 = TH1;
PCON = 0x00;
TR1 = 1;
}
void SendOneByte(unsigned char c)
{
SBUF = c;
while(!TI);
TI = 0;
}
void main() //主函数
{
unsigned int Tem1;
Init_Com();
while(!CP); //等待拉高
while(1)
{
Tem1=Read();//读出卡尺数据
SendOneByte(Styles);//模式 0:mm 1:inch
SendOneByte(Sign);//正负号 0:正 1负
SendOneByte(Tem1>>8);//有效读数高字节
SendOneByte(Tem1);//有效读数低字节
/*数据发送速度取决于卡尺数据输出速度*/
}
}
Ruler.H
#include<reg52.h>
//卡尺接口
sbit Data = P1^7;//数据
sbit CP = P1^6;//时钟
extern unsigned char Styles;//模式(0:mm 1:inch)
extern unsigned char Sign;//正负号(0:正 1:负)
unsigned char PR_DATA(unsigned char Data_Temp)//高低位交换
{
unsigned char DATA;
DATA=((Data_Temp&0x01)<<7|(Data_Temp&0x02)<<5|(Data_Temp&0x04)<<3|(Data_Temp&0x08)<<1
|(Data_Temp&0x10)>>1|(Data_Temp&0x20)>>3|(Data_Temp&0x40)>>5|(Data_Temp&0x80)>>7);
return DATA;
}
unsigned int Read()//读出数据应用: ReadData=Read();
{
unsigned int Dat,p=24,Temp,mm,inch;
unsigned char SignBit,Hbit,Lbit;
while(p--)//开始读数据
{
while(CP);
while(!CP);//等待时钟拉高
Dat=(Dat<<1)|Data;
switch (p)
{
case 16: Lbit=PR_DATA(Dat);break;
case 8: Hbit=PR_DATA(Dat);break;
case 0: SignBit=PR_DATA(Dat);break;
default:break;
}
}
Temp=(Hbit<<8)+Lbit;
if((SignBit==0x00)||(SignBit==0x80))Sign=0; //正数标志
if((SignBit==0x10)||(SignBit==0x90))Sign=1; //负数标志
if((SignBit==0x00)||(SignBit==0x10))Styles=0; //mm模式
if((SignBit==0x80)||(SignBit==0x90))Styles=1;; //inch模式
if(Styles==0)//模式判断
{
mm=Temp;
return mm; //mm模式
}
else
{
inch=Temp/2; //inch模式
return inch;
}
}