標(biāo)題: 使用中斷，蜂鳴器實(shí)現(xiàn)音樂(lè)功能，為什么我的FrepSelect的值在數(shù)組中無(wú)法改變 [打印本頁(yè)]
作者: 1322804412    時(shí)間: 2022-12-18 13:14
標(biāo)題: 使用中斷，蜂鳴器實(shí)現(xiàn)音樂(lè)功能，為什么我的FrepSelect的值在數(shù)組中無(wú)法改變
#include <REGX51.H>
#include "Timer0.h"
void delay (int m);

sbit Beep=P3^6;

unsigned int code FrepTable[]={
       63628,63731,63835,63928,64021,64103,64185,64260,64331,64400,64463,64528,
           64580,64633,64684,64732,64777,64820,64860,64898,64934,64968,65000,65030,
           65058,65085,65110,65134,65157,65178,65198,65217,65235,65252,65268,65283};


unsigned char Music[]={12,12,19,19,21,21,19,17,17,16,16,14,14,12};      




unsigned int FrepSelect;      


void main()
{
  Timer0Init();
  while(1)
  {[url=]U[/url]

           FrepSelect++;
   delay(500);

  }
  }
   void Timer0_Routine() interrupt 1
{
          
   TL0=FrepTable[FrepSelect]%256;
   TH0=FrepTable[FrepSelect]/256;
   Beep=!Beep;
  }

void delay (int m)

{

unsigned char i,j;

for (i=0;i<m;i++)

for (j=0;j<253;j++);

}

作者: 人中狼    時(shí)間: 2022-12-18 22:20
FrepSelect沒(méi)賦初值
作者: wulin    時(shí)間: 2022-12-19 07:48
延時(shí)函數(shù)使用的數(shù)據(jù)類型不當(dāng)，一旦實(shí)參m大于255就導(dǎo)致永遠(yuǎn)出不了for (i=0;i<m;i++)循環(huán)。
  1. #include <REG51.H>
  2. //#include "Timer0.h"
  3. void delay (int m);

  5. sbit Beep=P3^6;

  7. unsigned int code FrepTable[]={
  8. 63628,63731,63835,63928,64021,64103,64185,64260,64331,64400,64463,64528,
  9. 64580,64633,64684,64732,64777,64820,64860,64898,64934,64968,65000,65030,
  10. 65058,65085,65110,65134,65157,65178,65198,65217,65235,65252,65268,65283};

  12. unsigned char Music[]={12,12,19,19,21,21,19,17,17,16,16,14,14,12};      

  14. unsigned int FrepSelect;      

  16. void Timer0Init(void)
  17. {
  18.     TMOD = 0x01;
  19.     TH0 = 0;
  20.     TL0 = 0;
  21.     EA = 1;
  22.     ET0 = 1;
  23.     TR0 = 1;
  24. }

  26. void main()
  27. {
  28.         Timer0Init();
  29.         while(1)
  30.         {//[url=]U[/url]
  31.                 FrepSelect++;
  32.                 delay(500);
  33.         }
  34. }
  35. void Timer0_Routine() interrupt 1
  36. {
  37.         TL0=FrepTable[FrepSelect]%256;
  38.         TH0=FrepTable[FrepSelect]/256;
  39.         Beep=~Beep;
  40. }

  42. void delay (int m)
  43. {
  44.         int i,j;
  45.         for (i=0;i<m;i++)
  46.                 for (j=0;j<253;j++);
  47. }
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