51單片機(jī)-蜂鳴器音樂-梁祝.doc
單片機(jī)實(shí)訓(xùn)-蜂鳴器1、 設(shè)計(jì)思路學(xué)習(xí)案例中的實(shí)例程序，通過對程序的修改，使蜂鳴器能發(fā)出音樂2、 程序代碼#include <reg52.h>sbit speaker = P36;unsigned char timer0h, timer0l, time;/-/單片機(jī)晶振采用11.0592MHz/ 頻率-半周期數(shù)據(jù)表 高八位 本軟件共保存了四個(gè)八度的28個(gè)頻率數(shù)據(jù)code unsigned char FREQH = 0xF2, 0xF3, 0xF5, 0xF5, 0xF6, 0xF7, 0xF8, /低音12345670xF9, 0xF9, 0xFA, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC,/1,2,3,4,5,6,7,i0xFC, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, /高音 2345670xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF; /超高音 1234567/ 頻率-半周期數(shù)據(jù)表 低八位code unsigned char FREQL = 0x42, 0xC1, 0x17, 0xB6, 0xD0, 0xD1, 0xB6, /低音12345670x21, 0xE1, 0x8C, 0xD8, 0x68, 0xE9, 0x5B, 0x8F, /1,2,3,4,5,6,7,i0xEE, 0x44, 0x6B, 0xB4, 0xF4, 0x2D, /高音 2345670x47, 0x77, 0xA2, 0xB6, 0xDA, 0xFA, 0x16; /超高音 1234567/- /*unsigned char code sszymmh = 3,2,3,5,2,1,6,2,2,5,2,1,6,2, 1,1,3,4,6,2,3,1,3,1,3,2,2,2,2,1,3,2,1,5,2,4,5,2,3,3,2,1,6,2,2,3,2,1,2,2,1,1,2,4,5,2,3,3,2,1,2,2,3,6,1,1,1,2,4,1,2,4,1,3,3,6,2,1,5,2,2,6,2,1,6,2,1,5,2,1,5,2,4,5,2,3,6,2,1,1,2,1,2,2,1,5,2,1,3,2,4,2,2,3,3,2,1,5,2,2,1,3,2,6,2,1,5,2,1,3,2,1,2,2,1,1,2,4,6,2,3,1,3,1,5,2,1,3,2,1,2,2,2,6,1,1,1,2,1,1,2,4,6,2,3,1,3,1,5,2,1,3,2,1,2,2,2,1,2,4,6,2,3,1,3,1,5,2,1,3,2,1,2,2,2,6,1,1,1,2,1,1,2,4,6,2,3,1,3,1,5,2,1,3,2,1,2,2,2,6,1,1,1,2,1,1,2,4,0, 0, 0*/ unsigned char code sszymmh = 1,2,3,2,2,1,6,1,1,1,2,1,5,1,2,5,2,3,1,3,1,6,2,1,5,2,1,3,2,1,5,2,1,2,2,4,2,2,3,3,2,1,7,1,2,6,1,2,5,1,3,6,1,1,1,2,2,2,2,2,3,1,2,1,2,2,6,1,1,5,1,1,6,1,1,1,2,1,5,1,4,3,2,3,5,2,1,7,1,2,2,2,2,6,1,1,1,2,1,5,1,4,3,1,1,5,1,2,3,1,2,5,1,1,6,1,1,7,1,1,2,2,1,6,1,4,5,1,1,6,1,1,1,2,3,2,2,1,5,2,2,3,2,2,2,2,2,3,2,1,2,2,1,1,2,2,6,1,1,5,1,1,3,1,2,3,1,4,1,2,4,6,1,3,1,2,1,6,1,1,5,1,1,3,1,1,5,1,1,6,1,1,1,2,1,5,1,4,0, 0, 0;/梁祝void t0int() interrupt 1 /T0中斷程序，控制發(fā)音的音調(diào)TR0 = 0; /先關(guān)閉T0speaker = !speaker; /輸出方波, 發(fā)音TH0 = timer0h; /下次的中斷時(shí)間, 這個(gè)時(shí)間, 控制音調(diào)高低TL0 = timer0l;TR0 = 1; /啟動(dòng)T0/-void delay(unsigned char t) /延時(shí)程序，控制發(fā)音的時(shí)間長度unsigned char t1;unsigned long t2;for(t1 = 0; t1 < t; t1+) /雙重循環(huán), 共延時(shí)t個(gè)半拍for(t2 = 0; t2 < 8000; t2+); /延時(shí)期間, 可進(jìn)入T0中斷去發(fā)音TR0 = 0; /關(guān)閉T0, 停止發(fā)音/-void song() /演奏一個(gè)音符TH0 = timer0h; /控制音調(diào)TL0 = timer0l;TR0 = 1; /啟動(dòng)T0, 由T0輸出方波去發(fā)音delay(time); /控制時(shí)間長度/-void main(void)unsigned char k, i;TMOD = 1; /置T0定時(shí)工作方式1ET0 = 1; /開T0中斷EA = 1; /開CPU中斷while(1) i = 0;time = 1; while(time) k = sszymmhi + 7 * sszymmhi + 1 - 1;/第i個(gè)是音符, 第i+1個(gè)是第幾個(gè)八度timer0h = FREQHk; /從數(shù)據(jù)表中讀出頻率數(shù)值timer0l = FREQLk; /實(shí)際上, 是定時(shí)的時(shí)間長度time = sszymmhi + 2; /讀出時(shí)間長度數(shù)值i += 3;song(); /發(fā)出一個(gè)音符3、 實(shí)驗(yàn)結(jié)果蜂鳴器發(fā)出梁祝的音樂，結(jié)果視頻見結(jié)果視頻文件夾。
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