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//51單片機(jī)識(shí)別 "單擊.雙擊.長(zhǎng)按" 代碼
//作者：Kxuan163
//程序功能：檢測(cè)按鈕的按下彈起次數(shù)，以識(shí)別"單擊.雙擊.長(zhǎng)按"
//MCU: STC89c52RC 晶振 11.0592MHZ
//Proteus8仿真通過(guò)；51開(kāi)發(fā)板實(shí)驗(yàn)通過(guò)。
#include<reg52.h>
#include<stdlib.h>
sbit button =P1^2; //按鈕連接的單片機(jī)引腳
sbit LED1 =P2^7; //單擊則LED1亮
sbit LED2 =P2^4; //雙擊則LED2亮
sbit LED3 =P2^0; //長(zhǎng)按則LED3亮
unsigned char count; //T0計(jì)數(shù)溢出中斷次數(shù)
unsigned char finish; //T0計(jì)時(shí)一輪結(jié)束標(biāo)志
unsigned char read; //讀取P1^2引腳電平的變量
unsigned char dn; //讀得P1^2引腳低電平次數(shù)
unsigned char up; //button彈起次數(shù)
//延時(shí)函數(shù),入口參數(shù)ms為延時(shí)的毫秒數(shù)/////
void delayms(unsigned int ms)
{ unsigned char i;
while(ms--)
{ for(i = 0; i < 120; i++); }
} //////////////////////////////////////
//主函數(shù)
void main(void)
{
//T0 初始化 //////////////////////////
TMOD=0x01; //使用定時(shí)器T0的模式1
TH0=(65536-46083)/256; //定時(shí)器T0的高8位設(shè)置初值
TL0=(65536-46083)%256; //定時(shí)器T0的低8位設(shè)置初值
EA=1; //開(kāi)總中斷
ET0=1; //T0中斷允許
//////////////////////////////////////
while(1)
{
LED1 =1; LED2=1; LED3=1;
dn =0; up=0; count =0; finish =0;
TR0=1; //啟動(dòng)T0計(jì)時(shí)
while(finish !=1 ) //在設(shè)定的T0計(jì)時(shí)段內(nèi)循環(huán)檢測(cè)
{
read =button; //讀取P1^2引腳電平
if (read == 0) delayms(10); //延時(shí)10毫秒消熱抖動(dòng)
if (button == 0)
{dn ++; read =button;} //讀得P1^2低電平次數(shù)累加
if (read ==0 && button ==1) up ++;//彈起次數(shù)累加
} //end of while(finish !=1 )
// T0計(jì)時(shí)一輪結(jié)束，進(jìn)行識(shí)別：
TR0 =0;
if (dn >=1 && up ==1 ) //彈起1次,即單擊
{ LED1 =0; delayms(1000);} //LED1亮
if (dn >=2 && up ==2 ) //彈起2次,即雙擊
{ LED2=0; delayms(1000);} //LED2亮
if (dn>=20 && up==0 ) //持續(xù)未彈起,即長(zhǎng)按
{ LED3=0; delayms(1000);} //LED3亮
} //end of while(1)
} //end of main()
//函數(shù)：定時(shí)器T0的中斷服務(wù) ////////////////
void Time0(void ) interrupt 1 using 1
{
count++; //T0計(jì)數(shù)溢出中斷次數(shù)累加
if(count==20) //若T0計(jì)數(shù)溢出次數(shù)累計(jì)達(dá)設(shè)定值
{count =0; finish =1;} //一輪計(jì)時(shí)結(jié)束
TH0=(65536-46083)/256;
TL0=(65536-46083)%256;
} ///////////////////////////////////////
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