片機(jī)實(shí)驗(yàn)蜂鳴器和流水課件

1、實(shí)驗(yàn)一流水燈、蜂鳴器LED流水燈模塊 nLED流水燈由8只發(fā)光二板管組成，陽極通過限流電阻接至5V電源，陰極可由JP4跳線至51單片機(jī)P0端口進(jìn)行控制。nLED流水燈的供電電路。JP1是顯示電路供電選擇跳線。顯示電路有LED數(shù)碼管、LED流水燈、字符型LCD1602、點(diǎn)陣型LCD12864、點(diǎn)陣LED屏，通過JP1的跳線選擇可以對不同顯示電路供電。通常不要對2個(gè)及2個(gè)以上的顯示電路供電，以免互相影響。LED流水燈電路圖 跳線連接nJP1：用短路帽把5V電源供給流水燈。（Power for：Water LED）nJP4：利用短路帽將P0口與8只LED發(fā)光管連接，通過控制P0口線的輸出控制8只LE

2、D的亮/滅。參考程序n#include nvoid main(void)nn /定義流水燈的花樣數(shù)據(jù)nunsigned char code design46=0 xff,0 xfe,0 xfd,0 xfb,0 xf7,0 xef,0 xdf,0 xbf,0 x7f,n 0 x7f,0 xbf,0 xdf,0 xef,0 xf7,0 xfb,0 xfd,0 xfe,0 xff,n0 xff,0 xfe,0 xfc,0 xf8,0 xf0,0 xe0,0 xc0,0 x80,0 x0,0 xe7,0 xdb,0 xbd,0 x7e,0 xff,0 xff,0 x7e,0 xbd,0 xdb,0 x

3、e7,n0 x0,0 x80,0 xc0,0 xe0,0 xf0,0 xf8,0 xfc,0 xfe,0 xff;nunsigned int a;/定義循環(huán)變量nunsigned char b;ndonfor(b=0;b46;b+)/46個(gè)花樣輪流顯示nnfor(a=0;a10000;a+);/延時(shí)一段時(shí)間nP0=designb;/讀已定義的花樣數(shù)據(jù)并將其輸出到P0口n n while(1);n蜂鳴器模塊 n主板有一只有源蜂鳴器，由PNP型三極管驅(qū)動(dòng)，如下圖所示。驅(qū)動(dòng)信號(hào)可通過JP13跳線選擇由51單片機(jī)的P2.6端口提供。蜂鳴器電路圖參考程序n#include nsbit beep=P26;nvoid delay(const unsigned int DELAY)nnunsigned int x, y;n for (x = 0; x = DELAY; x+)n n for (y = 0; y = 120; y+);n nnvoid main(void)nnwhile(1)n nbeep=1;ndelay(1000);nbeep=0;n delay(1000);nn思考題n用C51寫一段程序，讓蜂