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// Header: 編碼開關代碼
#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流水燈初始化
/*************************定義接口************************/
sbit SJ=P1^5; //LED的使能端 YY開發板特有
sbit WEI=P1^6; //74HC573的LE端 U4 LED的位選端 YY開發板特有，熄滅數碼管
/*************************定義接口************************/
sbit PINA=P3^2; //定義編碼器連接的IO
sbit PINB=P3^3; //定義編碼器連接的IO
/*************************過程返回************************/
uchar WheelLeft()
{
Led++;
return(NULL);
}
/*************************右轉一步的操作************************/
uchar WheelRight()
{
Led--;
return(NULL);
}
/*************************編碼器過程************************/
uchar EncoderProcess()
{
uchar keytmp,keytmp1,keytmp2,WheelNow;
PINA=1; //PINA至高電平
PINB=1; //PINB至高電平
if(PINA==1) //如果PINA為高電平
{
keytmp1=0x01;
}
else keytmp1=0;
if(PINB==1) //如果PINB為高電平
{
keytmp2=0x02;
}
else keytmp2=0;
WheelNow=keytmp1+keytmp2; //根據兩個IO組合成16進制數為0x00|0x01|0x02|0x03
keytmp=WheelNow;
keytmp^=WheelOld; //判斷新數據同舊數據
if(keytmp==0) return(NULL); //如果新數據和原來的數據一樣 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()); //左旋轉00 01 03
}
if(WheelOld==0x03 && WheelNow==0x02)
{
x=WheelNow;
}
if(WheelOld==0x03 && x==0x02 && WheelNow==0x00)
{
WheelOld=WheelNow;
x=0;
return(WheelLeft()); //左旋轉03 02 00
}
if(WheelOld==0 && WheelNow==0x02)
{
x=WheelNow;
}
if(WheelOld==0 && x==0x02 && WheelNow==0x03)
{
WheelOld=WheelNow;
x=0;
return(WheelRight()); //右旋轉00 02 03
}
if(WheelOld==0x03 && WheelNow==0x01)
{
x=WheelNow;
}
if(WheelOld==0x03 && x==0x01 && WheelNow==0x00)
{
WheelOld=WheelNow;
x=0;
return(WheelRight()); //右旋轉03 01 10
}
}
/*************************主函數************************/
void main()
{
SJ=0; //開LED總使能 YY開發板特有
WEI=0;
while (1)
{
EncoderProcess();
Fnshu(Led); //此句為將變量顯示于TM637函數，具體看工程文件內的TM637.H文件
}
}
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