sound.c

单片机开发资料光盘-双龙-686M.zip

#include <io8515.h>                /*预处理命令 */
#define uchar unsigned char
#define uint unsigned int
void delay(uchar t)
{
 uchar i,j;
  for (i=0;i<t;i++)
     for(j=1;j<150;j++);
}
void sound_pc0(uchar t)
{
 uint i;
 DDRC=0xff;
 PORTC=0xff;
 for (i=0;i<350-t*t;i++)           
    {
     PORTC^=0x01;
     delay(t);
    }
}
void main (void)                    
{
 uchar dt;
 for(;;)
    {
     for(dt=1;dt<14;dt++)               
         sound_pc0(dt);
     }
}