利用按鍵操作數(shù)碼管顯示

1、實(shí)驗(yàn)功能：兩位數(shù)碼管顯示功能。具體功能描述如下：數(shù)碼管可以顯示0-99兩位數(shù)字，按一下加按鍵，數(shù)字加1；按一下減按鍵，數(shù)字減1。按下清零按鍵，數(shù)字清零。程序：/*- *該程序?qū)崿F(xiàn)的是利用單片機(jī)實(shí)現(xiàn)兩位數(shù)碼管顯示功能。具體功能描述如下： *數(shù)碼管可以顯示0-99兩位數(shù)字，按一下加按鍵，數(shù)字加1；按一下減按鍵，數(shù)字減1 *此外為了方便，還添加了一個(gè)清零按鈕，按下清零按鈕計(jì)數(shù)歸零。 *-*/#include <reg51.h>#define unchar unsigned char/宏定義#define open 0#define close 1void delayms(char m);

2、/延時(shí)函數(shù)聲明void display();/數(shù)碼管顯示函數(shù)聲明sbit up = P22;/加一按鈕sbit down = P23;/減一按鈕sbit clear = P24;/清零按鈕sbit Ledshi = P20;/十位數(shù)碼管使能端sbit Ledge = P21;/個(gè)位數(shù)碼管使能端unchar LedCode=/數(shù)碼管真值表0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90;char count = 0;char ge = 0;char shi = 0;void digitalTube()if(clear = 0)delayms(10

3、);/按鍵消抖，是因?yàn)閷?shí)際中按鍵剛剛被按下時(shí)電平抖動(dòng)不穩(wěn)定，延時(shí)10ms讓電平穩(wěn)定下來(lái)再次判斷即可if(clear = 0)count = 0;while(clear = 0)/松手檢測(cè)display();if(up = 0)delayms(10);if(up = 0)count+;if(count = 100)count = 0;while(up = 0)/松手檢測(cè)display();if(down = 0)delayms(10);if(down = 0)count-;if(count = (-1)count = 99;while(down = 0)display();display();void display()/計(jì)算各數(shù)碼管顯示的數(shù)值ge = count%10;shi = count/10;/關(guān)閉數(shù)碼管使能端，防止亂入Ledge = close;Ledshi = close;/輪流導(dǎo)通兩位數(shù)碼管P0 = LedCodege;Ledge = open;/打開(kāi)個(gè)位數(shù)碼管delayms(1);Ledge = close;P0 = LedCodeshi;Ledshi = open;delayms(1);Ledshi = close;void delayms(char m)/延時(shí)m毫秒char