【51定时器】独立按键-短按与长按

1. //定时器0初始化模板   //1毫秒@11.0592MHz
2. void Timer0_Init(void)   //1毫秒@11.0592MHz
3. {
4.  TMOD &= 0xF0;   //设置定时器模式
5.  TMOD |= 0x01;   //设置定时器模式
6.  TL0 = 0x66;   //设置定时初值
7.  TH0 = 0xFC;   //设置定时初值
8.  TF0 = 0;    //清除TF0标志
9.  TR0 = 1;    //定时器0开始计时
10.   ET0=1;
11.   EA=1;
12.   PT0=0;  
13. }

1. void Timer0_Routine() interrupt 1  //定时器0的中断函数
2. {
3.  static unsigned int T0Count,anjian;
4. 
5.  TL0 = 0x66;   //设置定时初值
6.  TH0 = 0xFC;   //设置定时初值
7.  T0Count++;anjian++;
8.  if(anjian>=10)//10ms扫描一次按键
9.  {
10.     KeyScan();
11.     anjian=0;//清零
12.   }
13. 
14.   if(T0Count>=1000)
15.   {
16.     //1000ms=1s，每一秒
17.     T0Count=0;
18.   }
19. 
20. }

1. #include <REGX52.H>
2. #include "KeyTimer0.h"
3. 
4. unsigned char KeyNum;
5. 
6. 
7. //----------------------------------
8. //对外获取按键值函数(外部调用的函数)
9. unsigned char GetKey_Num(){
10.   unsigned char t;
11.   t = KeyNum;   
12.   KeyNum = 0;   
13.   return t;//返回t
14. }//KeyNum每次清零，还想要得到KeyNum的数值党返回值，所以新建一个变量t
15. //-----------------------------------------
16. 
17. unsigned char GetKeyNum()//获取键码函数(内部调用)
18. {
19.   unsigned char Key=0;
20.   if(P3_1==0) Key=1;//按下Key代表键码,松手是Key = 0
21.   if(P3_0==0) Key=2;
22.   if(P3_2==0) Key=3;
23.   if(P3_3==0) Key=4;
24. 
25.   return Key;//返回键码数值
26. }
27. //-----------------------------------------------
28. 
29. void KeyScan(){
30.   static unsigned char nowKey,lastKey,K1count,K2count,K3count,K4count; 
31.   lastKey = nowKey;
32. 
33. 
34.   nowKey = GetKeyNum();//获取按键值
35. 
36.   //按下&&抬起 有时间差10ms扫描，直到松手
37. 
38.   if(lastKey == 1 && nowKey == 1){K1count++;}
39.   if(lastKey == 2 && nowKey == 2){K2count++;}
40.   if(lastKey == 3 && nowKey == 3){K3count++;}
41.   if(lastKey == 4 && nowKey == 4){K4count++;}
42. 
43.   if(K1count>=10 && K1count<=100 && nowKey==0) {KeyNum = 1;K1count=0;}  //100ms-1s,短按
44.   else if(K1count>100 && nowKey==0) {KeyNum = 11;K1count=0;}      //大于1s,长按
45.   if(K2count>=10 && K2count<=100 && nowKey==0) {KeyNum = 2;K2count=0;}
46.   else if(K2count>100 && nowKey==0) {KeyNum = 22;K2count=0;}      
47.   if(K3count>=10 && K3count<=100 && nowKey==0) {KeyNum = 3;K3count=0;}
48.   else if(K3count>100 && nowKey==0) {KeyNum = 33;K3count=0;}
49.   if(K4count>=10 && K4count<=100 && nowKey==0) {KeyNum = 4;K4count=0;}
50.   else if(K4count>100 && nowKey==0) {KeyNum = 44;K4count=0;}  
51. }

1. #include <REGX52.H>
2. #include "Timer0.h"
3. #include "KeyTimer0.h"
4. 
5. unsigned char Key_Value;
6. 
7. void main()
8. {
9.  Timer0_Init();
10.   while(1)
11.   {
12.     Key_Value = GetKey_Num();
13. 
14.     if(Key_Value == 4)
15.       P2_0=~P2_0;
16.     if(Key_Value == 44)
17.       P2_2=~P2_2;
18.   }
19. 
20. }