【文章內(nèi)容簡介】 器0進(jìn)行節(jié)拍的控制，并在播放和暫停播放中隨時(shí)判斷是否有紅外信號的改變，以便隨時(shí)更換或結(jié)束音樂。本設(shè)計(jì)中歌曲的音符存在一個(gè)數(shù)組中，以在開始位置和在中間位置播放不同的曲目。紅外信號解碼后，用兩位共陰數(shù)碼管顯示其中的數(shù)據(jù)碼[3]。顯示電路的74HC573用于數(shù)碼管的驅(qū)動(dòng)，74HC138用于數(shù)碼管動(dòng)態(tài)掃描時(shí)的位選，蜂鳴器播放音樂源碼如下：define uchar unsigned chardefine uint unsigned intsbit FM=P2^3。 //定義蜂鳴器引腳uchar count。unsigned char code song[] ={ //祝你平安0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20,0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20,0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20,0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20,0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10,0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x20,0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x1c,0x20,0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10,0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80,0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20,0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x00, //八月桂花遍地開0x18,0x30,0x1C,0x10,0x20,0x40,0x1C,0x10,0x18,0x10,0x20,0x10,0x1C,0x10,0x18,0x40,0x1C,0x20,0x20,0x20,0x1C,0x20,0x18,0x20,0x20,0x80,0xFF,0x20,0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,0x30,0x80,0xFF,0x20,0x20,0x1C,0x10,0x18,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,0x20,0x1C,0x10,0x18,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,0x30,0x80,0x20,0x30,0x1C,0x10,0x20,0x10,0x1C,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,0x15,0x1F,0x05,0x20,0x10,0x1C,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,0x30,0x30,0x20,0x30,0x1C,0x10,0x18,0x40,0x1C,0x20,0x20,0x20,0x26,0x40,0x13,0x60,0x18,0x20,0x15,0x40,0x13,0x40,0x18,0x80,0x00}。void delay_50us(uint t) //延時(shí)50微秒{ uchar j。 for(。t0。t) { for(j=19。j0。j)。 }}void timer0init(void) { TMOD = 0x01。 //定時(shí)器0 定時(shí)方式1 IE = 0x82。 //開定時(shí)器中斷 開總中斷 TH0 = 0xDC。 //定時(shí)10ms TL0 = 0x00。 //定時(shí)10ms}void play(uchar i) //音樂播放函數(shù){ uchar temp1,temp2。 uint addr。 //song[]播放位置 count = 0。 //中斷計(jì)數(shù)清0 addr = i * 217。 while(1) { temp1 = song[addr++]。 if (temp1 == 0xFF) //休止符 { TR0 = 0。 //關(guān)閉定時(shí)器0 delay_50us(100)。 } else if (temp1 == 0x00) //歌曲結(jié)束符 { return。 } else { temp2 = song[addr++]。 TR0 = 1。 //啟動(dòng)定時(shí)器0 while(1) { FM = ~FM。 delay_50us(temp1)。 if(temp2 == count)//節(jié)拍 { count = 0。 break。 } } } void main(){ timer0init()。 //定時(shí)器初始化 while(1) { play(0)。 // play(0)為祝你平安 play(1)為八月桂花遍地開 }}void timer0() interrupt 1{ TH0 = 0xDC。 TL0 = 0x00。 count++。 //長度加1}數(shù)碼管顯示紅外解碼值源碼如下：define uchar unsigned charuchar table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}。 //數(shù)碼管顯示編碼uchar disp[2]。 //送往數(shù)碼管的數(shù)void irwork(void) //把解碼后的數(shù)據(jù)轉(zhuǎn)成16進(jìn)制的兩位數(shù){ disp[0]=ircode[2]/16。 //取出ircode中的兩位“數(shù)據(jù)碼” disp[1]=ircode[2]%16。 //取出ircode中的兩位“數(shù)據(jù)碼”}void display(void) //數(shù)碼管顯示函數(shù){ P0=table[disp[0]]。 //P0口送數(shù)據(jù) P2=0x06。 //數(shù)據(jù)管位選 delay_50us(2)。 //顯示數(shù)值保持100us P2=0x00。 //關(guān)閉位選 P0=table[disp[1]]。 //P0口送數(shù)據(jù) P2=0x07。 //數(shù)據(jù)管位選 delay_50us(2)。 //顯示數(shù)值保持100us P2=0x00。 //關(guān)閉位選}void main(){ while(1) { display()。 }}第4章 硬件調(diào)試根據(jù)上述設(shè)計(jì)電路畫出電路原理圖，根據(jù)原理圖焊接電路板，實(shí)物圖如圖41所示：圖41 實(shí)物圖在本設(shè)計(jì)中使用的紅外遙控器如圖42所示，遙控器各按鍵相應(yīng)碼值如圖43所示： 1b 1817 16 1514 13 1211 10 0f1a 0e 1900 080207 06 050a1d 031f 04 0b圖42 紅外遙控器 圖43 遙控器按鍵碼值 紅外遙控音樂播放器的設(shè)計(jì)中，對于紅外遙控器未將全部的按鍵設(shè)計(jì)功能，本設(shè)計(jì)使用按鍵對應(yīng)碼值及功能如表41所示：表41 遙控器按鍵、碼值及功能表遙控器按鍵按鍵對應(yīng)碼值功能數(shù)字鍵117曲目1數(shù)字鍵216曲目2頻道“+”02暫停音量“” 07上一曲確認(rèn)06確認(rèn)音量“+”05下一曲頻道“”0a停止根據(jù)設(shè)計(jì)功能進(jìn)行硬件調(diào)試，調(diào)試過程如下：(1)單片機(jī)上電，此時(shí)無按鍵按鍵，數(shù)碼管顯示00，蜂鳴器不