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// Header: 编码开关代码
#include <STC12C2052AD.H>
#include "TM1637.h"
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define NULL 0
uchar x,WheelOld;
uchar Led=0;//LED流水灯初始化
/*************************定义接口************************/
sbit SJ=P1^5; //LED的使能端 YY开发板特有
sbit WEI=P1^6; //74HC573的LE端 U4 LED的位选端 YY开发板特有，熄灭数码管
/*************************定义接口************************/
sbit PINA=P3^2; //定义编码器连接的IO
sbit PINB=P3^3; //定义编码器连接的IO
/*************************过程返回************************/
uchar WheelLeft()
{
Led++;
return(NULL);
}
/*************************右转一步的操作************************/
uchar WheelRight()
{
Led--;
return(NULL);
}
/*************************编码器过程************************/
uchar EncoderProcess()
{
uchar keytmp,keytmp1,keytmp2,WheelNow;
PINA=1; //PINA至高电平
PINB=1; //PINB至高电平
if(PINA==1) //如果PINA为高电平
{
keytmp1=0x01;
}
else keytmp1=0;
if(PINB==1) //如果PINB为高电平
{
keytmp2=0x02;
}
else keytmp2=0;
WheelNow=keytmp1+keytmp2; //根据两个IO组合成16进制数为0x00|0x01|0x02|0x03
keytmp=WheelNow;
keytmp^=WheelOld; //判断新数据同旧数据
if(keytmp==0) return(NULL); //如果新数据和原来的数据一样 就直接退出
if(WheelOld==0 && WheelNow==0x01)
{
x=WheelNow;
}
if(WheelOld==0 && x==0x01 && WheelNow==0x03)
{
WheelOld=WheelNow;
x=0;
return(WheelLeft()); //左旋转00 01 03
}
if(WheelOld==0x03 && WheelNow==0x02)
{
x=WheelNow;
}
if(WheelOld==0x03 && x==0x02 && WheelNow==0x00)
{
WheelOld=WheelNow;
x=0;
return(WheelLeft()); //左旋转03 02 00
}
if(WheelOld==0 && WheelNow==0x02)
{
x=WheelNow;
}
if(WheelOld==0 && x==0x02 && WheelNow==0x03)
{
WheelOld=WheelNow;
x=0;
return(WheelRight()); //右旋转00 02 03
}
if(WheelOld==0x03 && WheelNow==0x01)
{
x=WheelNow;
}
if(WheelOld==0x03 && x==0x01 && WheelNow==0x00)
{
WheelOld=WheelNow;
x=0;
return(WheelRight()); //右旋转03 01 10
}
}
/*************************主函数************************/
void main()
{
SJ=0; //开LED总使能 YY开发板特有
WEI=0;
while (1)
{
EncoderProcess();
Fnshu(Led); //此句为将变量显示于TM637函数，具体看工程文件内的TM637.H文件
}
}
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