持续进军之五一节日-----独立按键触发状态机LED显示

发表于 5/4/2014 6:37:18 PM 阅读（2050）

先上代码，不多解释，按键状态机耽误了我很多时间啊！！！o^^o

请高手明示

/*
网名：坎悟积验
功能：独立按键状态机检测
现象：简单的单个循环与连续循环
Fosc:11059200Hz
MCU :STC89C52RC
Day :2014-05-04
*/
#include <reg52.h>
typedef unsigned char Uint8;
typedef unsigned int Uint16;
Uint8 code tab[] = {0xff,0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
#define FSM_Initial 0
#define FSM_Confirm 1
#define FSM_Single 2
#define FSM_Continuous 3
//#define FSM_Reverse 4
sbit Key_IN = P3^4;
void Time0_10ms();
void main()
{
P2 = 0xff;
TMOD = 0x01;
TH0 = 0xdc;
TL0 = 0;
EA = 1;
ET0 = 1;
TR0 = 1;
while(1)
{
Time0_10ms();
}
}
Uint8 KeyScan()
{
Uint8 state_KeyIn;
static Uint8 state_keyscan = 0;
static Uint8 Conter_Num = 0;
static Uint8 Temp_Num = 0;
state_KeyIn = Key_IN;
switch(state_keyscan)
{
case FSM_Initial: if(!state_KeyIn)
state_keyscan = FSM_Confirm;
break;
case FSM_Confirm: if(!state_KeyIn)
state_keyscan = FSM_Single;
else
state_keyscan = FSM_Initial;
break;
case FSM_Single:
if(++Conter_Num > 100)
{
Conter_Num = 0;
state_keyscan = FSM_Continuous;
}
// if(++Conter_Num > 200)
// {
// Conter_Num = 0;
// state_keyscan = FSM_Reverse;
// }

else
{
if(state_KeyIn)
{
state_keyscan = FSM_Initial;
if(++Temp_Num == 9)Temp_Num = 0;
}
}
break;
case FSM_Continuous: if(++Conter_Num == 10)
{
Conter_Num = 0;
if(++Temp_Num == 9)Temp_Num = 0;
}
else
if(state_KeyIn)
state_keyscan = FSM_Initial;
break;
// case FSM_Reverse: if(++Conter_Num == 10)
// {
// Conter_Num = 0;
// if(--Temp_Num == 0)Temp_Num = 9;
// }
// else
// if(state_KeyIn)
//
// state_keyscan = FSM_Initial;
// else
// {
// if(state_KeyIn)
// {
// state_keyscan = FSM_Initial;
// if(--Temp_Num == 0)Temp_Num = 9;
// }
// }
// break;
default: state_keyscan = FSM_Initial;
break;
}
return Temp_Num;
}
void Time0_10ms()
{
if(TF0)
{
TF0 = 0;
TH0 = 0xdc;
TL0 = 0;
P2 = tab[KeyScan()];
}
}