世上只有妈妈好音乐，新手用不来中断，见笑了，求交流

只看该作者 · 2012-4-5 15:36

本帖最后由 nilizhi 于 2012-4-5 16:16 编辑

#include <reg51.h>
#include <intrins.h>

void delay_var(unsigned int t) //有参延时函数
{
      unsigned int i;
      i=t;
      while(i--);

}

sbit speaker=P2^4;

code unsigned char diao1[]={0,47,43,39,35,32,29,26,23,20,18,16,14,12,10,8                      //15个基本音调


                                                      };


code unsigned char yinyue[]={13,12,10,12,15,13,12,13,                                        //世上只有妈妈好音调
                                                      10,12,13,12,10,8,6,12,
                                                      10,9,9,10,12,12,13,10,
                                                      9,8,12,10,9,8,6,8,5,
                                                      5,0

                                                      };

code unsigned char sj[]={3,1,2,2,2,1,1,
                                             4,2,1,1,2,2,1,                               //世上只有妈妈好每个音调长度
                                             1,1,1,4,3,1,2,
                                             1,1,2,2,4,3,1,
                                             1,1,1,1,3,3,0

                                             };

void main(void)
{
      unsigned char i=0;
      unsigned int f,h,shijian;
      while(1)
      {
            i=0;
            while(yinyue!=0)
            {
                     h=sj;
                     f=h*12000/diao1[yinyue];                   //每个音长相对固定，不随频率变化
                     shijian=diao1[yinyue];

                     while(f--)
                     {
                              speaker=0;
                              delay_var(shijian+1);
                              speaker=1;
                              delay_var(shijian);
                     }
                     delay_var(5000);
                     i++;

            }

      delay_var(50000);

      }
}

新手求交流 EMAIL：nilizhide@163.com    QQ：380668522