按鍵控制蜂鳴器演奏音樂
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2016-11-20 21:02 上傳
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音樂
- #include<reg52.h>
- sbit spek=P3^7; //聲音輸出端
- sbit set=P3^2; //設(shè)定及退出鍵,按奇數(shù)次為設(shè)定功能；偶數(shù)次為退出功能
- sbit up=P3^1; //上一曲
- sbit down=P3^0; //下一曲
- bit flag1,flag2; //按鍵掃描標(biāo)志位，新鍵值標(biāo)志位
- unsigned char f_t,n,i,key,k_max; //音符頻率對應(yīng)的二分之一周期值，節(jié)拍常數(shù)值，查表用計數(shù)器，鍵值，最大鍵值
- unsigned char *p_music; //指向音樂數(shù)據(jù)數(shù)組的指針
- void timer_ms(unsigned char tim); //毫秒級延時函數(shù)聲明
- void timer_us(unsigned char t); //微秒級延時函數(shù)
- void key_scan(void); //按鍵掃描函數(shù)
- void key_manage(); //鍵值處理函數(shù)
- //格式為：頻率常數(shù)，節(jié)拍常數(shù)，頻率常數(shù)，節(jié)拍常數(shù)
- unsigned char code music_table1[]={
- 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}; //八月桂花香
- unsigned char code music_table2[]={
- 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}; //祝你平安
- unsigned char code music_table3[]={
- 0x20,40,0x26,20,0x20,20,0x17,80,0x1c,40,0x17,40,
- 0x20,80,0x20, 40,0x2f,20,0x2a,20,0x26,40,0x2a,20,
- 0x2f,20,0x2a,80,0xff,0x20,40,0x26,20,0x20,20,0x17,60,
- 0x19,20, 0x1c,40,0x17,40,0x20,80,0x20,40,0x2a,20,
- 0x26,20,0x24,60,0x32,20,0x2f,80,0xff,0x1c,40,0x17,40,
- 0x17, 80,0x19,40,0x1c,20,0x19,20,0x17,80,0x1c,20,
- 0x19,20,0x17,20,0x1c,20,0x1c,20,0x20,20,0x26,20,0x2f,20,
- 0x2a,80,0xff,0x20,40,0x26,20,0x20,20,0x17,60,0x19,20,
- 0x1c,40,0x17,40,0x20,80,0x20,40,0x2a,20,0x26, 20,
- 0x24,60,0x32,20,0x2f,80,0xff,0x20,40,0x26,20,0x20,20,
- 0x17,80,0x1c,40,0x17,40,0x20,80,0x20,40, 0x2f,20,0x2a,20,
- 0x26,40,0x2a,20,0x2f,20,0x2a,80,0xff,0x20,40,0x26,20,
- 0x20,20,0x17,60,0x19,20,0x1c, 40,0x17,40,0x20,80,0x20,40,
- 0x2a,20,0x26,20,0x24,60,0x32,20,0x2f,80,0}; //送別
- main()
- {
- spek=0;
- P3=0x7f;
- TMOD=0x01; //T0工作于方式1，即16位定時器模式
- IE=0x82; //開總中斷，T0中斷
- flag2=0; //
- flag1=0;
- key=1;
- k_max=3; //最大鍵值（取值范圍1~254）
- n=0;
- i=0;
- p_music=music_table1; //指針賦初值
- while (1)
- {
- switch (p_music[i])
- {
- case 0x00: i=0; //歌曲完，則停止0.5S后重新開始
- timer_ms(250); //延時0.25ms
- timer_ms(250);
- break;
- case 0xff: i++; //遇到休止符則停止100us
- timer_ms(250);
- timer_ms(250);
- break;
- default: f_t=p_music[i++];
- n=p_music[i++];
- spek=1;
- TR0=1;
- while (n!=0)
- {
- spek=~spek;
- timer_us(4*f_t); //改變f_t前面的系數(shù)可以調(diào)整音符頻率的高低
- }
- TR0=0;
- spek=0;
- if(set==0)
- {
- key_scan();
- key_manage();
- }
- }
- }
- }
- /**************************************************************
- 函數(shù)名稱： 定時器0的中斷處理程序 函數(shù)功能： 完成10毫秒定時 入口參數(shù)：
- 出口參數(shù)： 其 它： **************************************************************/
- void timer0() interrupt 1 using 2
- {
- TH0=(65536-10000)/256; //定時10毫秒
- TL0=(65536-10000)%256;
- n--; }
- /**************************************************************
- 函數(shù)名稱： 延時程序 函數(shù)功能： 完成微秒級的延時 入口參數(shù)：
- t為需延時的時間（取值范圍1~255；延時時間5~1275us） 出口參數(shù)：
- 其 它： **************************************************************/
- void timer_us(unsigned char t)
- {
- while (--t); //本語句執(zhí)行一次需5us的時間
- }
- /**************************************************************
- 函數(shù)名稱： 按鍵掃描函數(shù) 函數(shù)功能： 完成按鍵掃描處理 入口參數(shù)：
- 應(yīng)為在中斷函數(shù)中被調(diào)用，所以不能有參數(shù)傳遞 出口參數(shù)： 其 它：
- **************************************************************/
- void key_scan(void)
- {
- timer_ms(10); //延時10ms等待按鍵狀態(tài)穩(wěn)定
- if (set==0) //再次確認(rèn)
- {
- while (set==0); //等待按鍵松開
- flag1=1; //該位為1，表示進(jìn)入按鍵掃描處理；為0，表示本次按鍵掃描處理完成
- while (flag1)
- {
- if (up==0) //加一鍵
- {
- timer_ms(10);
- if (up==0)
- {
- while (!up);
- key++;
- if (key>k_max) key=1;
- }
- }
- if (down==0) //減一鍵
- {
- timer_ms(10);
- if (down==0)
- {
- while (!down);
- key--;
- if (key<1) key=k_max;
- }
- }
- if (set==0) //退出鍵
- {
- timer_ms(10);
- if (set==0)
- {
- while (set==0);
- flag1=0; //表示本次按鍵掃描處理完成
- flag2=1; //該位置1，表示有新鍵值要處理
- }
- }//以上鍵值處理的范圍為1到254個鍵值
- }
- }
- }
- /**************************************************************
- 函數(shù)名稱： 鍵值處理函數(shù) 函數(shù)功能： 完成按鍵鍵值的處理
- 入口參數(shù)： 應(yīng)為在中斷函數(shù)中被調(diào)用，所以不能有參數(shù)傳遞
- 出口參數(shù)： 其 它：
- **************************************************************/
- void key_manage()
- {
- flag2=0;
- switch (key)
- {
- case 1: p_music=music_table1; //鍵值為1 播放第一首樂曲
- goto kh1;
- case 2: p_music=&music_table2[0]; //鍵值為2 播放第2首樂曲
- goto kh1;
- case 3: p_music=&music_table3[0]; //鍵值為3 播放第3首樂曲
- goto kh1;
- default: key=1;
- p_music=music_table1;
- kh1: TH0=(65536-10000)/256;
- TL0=(65536-10000)%256;
- break;
- }
- n=0;
- i=0;
- }
- /*----------------------------------------------------------------------------------------------------
- 函數(shù)名稱： timer_ms 函數(shù)說明： 1ms延時子程序 入口參數(shù)： tim為接收主調(diào)傳來需延時的毫秒數(shù)，取值范圍1~256，定時時間1~256ms
- 出口參數(shù)： 其 它： ----------------------------------------------------------------------------------------------------*/
- void timer_ms(unsigned char tim)
- {
- unsigned char j;
- while(tim--)
- {
- for(j=0;j<200;j++); //延時1ms
- }
- }
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