CT107D单片机按键状态机实战

#include <STC15F2K60S2.H> #include <main.h> #define XBYTE(address,data) P2 = ((P2&0x1f)|address);P0 = data;P2 = P2&0x1f; //关闭外设 unsigned char flag = 0; unsigned char Key_Num; unsigned char i; bit GN = 0; void key(); void time0(); void main() { XBYTE(0xA0,0x00); XBYTE(0x80,0xff); time0(); while(1) { key(); // XBYTE(0x80,P0&(~0x40)); if(Key_Num == '7') { XBYTE(0x80,P0&(~0x40)); //控制一个灯亮 } else { XBYTE(0x80,P0|0x40); //控制一个灯灭 } if(Key_Num == '6') { XBYTE(0x80,P0&(~0x20)); }else { XBYTE(0x80,P0|0x20); } if(Key_Num == '5') { XBYTE(0x80,P0&(~0x10)); }else { XBYTE(0x80,P0|0x10); } // if(Key_Num == '4') // { // XBYTE(0x80,P0&(~0x08)); // }else // { // XBYTE(0x80,P0|0x08); // } if(Key_Num == '4') //长按--短按对应的状态 { if(GN == 1) { XBYTE(0x80,0x00); } if(GN == 0) { XBYTE(0x80,0xff); } } } } void key() { static unsigned char temp,state=0; if(!flag)return; else flag = 0; if(!P30) temp = 1; else if(!P31) temp = 2; else if(!P32) temp = 3; else if(!P33) temp = 4; else temp = 0; switch(state) { case 0: //状态1 判断是否有键按下 { if(temp != 0) state = 1; } break; case 1: //状态2 有键按下并读取数据 { if(temp == 0) state = 0; //10ms的消抖 else { if(temp == 1) //按键S7 //短S7按键处理down { Key_Num = '7'; state = 2; } if(temp == 2) //按键S6 //短S6按键处理down { Key_Num = '6'; state = 2; } if(temp == 3) //按键S5 //短S5按键处理down { Key_Num = '5'; state = 2; } if(temp == 4) //按键S4 //短S4按键处理down { Key_Num = '4'; state = 2; } } } break; case 2: //状态3 松开检测 { i++; //长按1秒 if(i > 100) { i = 0; if(GN == 1) //标志位 { GN = 0; }else { GN = 1; } } if(temp == 0) { state = 0; } } break; } } void time0() //1ms { TMOD = 0x01; TL0 = (65536-1000)%256; TH0 = (65536-1000)/256; TF0 = 0; TR0 = 1; ET0 = 1; EA = 1; } void time_0() interrupt 1 { static unsigned char num; TL0 = (65536-1000)%256; TH0 = (65536-1000)/256; if(num<=1000) { num++; }else { num = 0; } if(num%10==0) flag = 1; // // if(num++ >= 10) // { // // num = 0; // flag = 1; // } }