单片机C语言程序举例(三)

//此程序在硬件上调试通过
//本程序的单片机晶振采用11.0592M
#include
sbit      speaker=P1^2; 
unsigned char timer0h,timer0l,time;
        //世上只有妈妈好数据表
code unsigned char sszymmh[]={        6,2,3,      5,2,1,      3,2,2, 5,2,2, 1,3,2, 6,2,1, 5,2,1,
                                      6,2,4,      3,2,2,      5,2,1, 6,2,1, 5,2,2, 3,2,2, 1,2,1,
                                      6,1,1,      5,2,1,      3,2,1, 2,2,4, 2,2,3, 3,2,1, 5,2,2,
                                      5,2,1,      6,2,1,      3,2,2, 2,2,2, 1,2,4, 5,2,3, 3,2,1,
                                      2,2,1,      1,2,1,      6,1,1, 1,2,1, 5,1,6, 0,0,0
                                      };
       // 音阶频率表 高八位
code unsigned char FREQH[]={
                                0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8,
                                0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i
                                0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,
                                0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,
                               } ;
         // 音阶频率表 低八位
code unsigned char FREQL[]={
                                 0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,
                                 0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i
                                 0xEE,0x44, 0x6B,0xB4,0xF4,0x2D,
                                 0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,
                                };
void delay(unsigned char t)
   {
   unsigned char t1;
   unsigned long t2;
   for(t1=0;t1    {
    for(t2=0;t2<8000;t2++)
       {
        ;
        }
   }
   TR0=0;
 }
void t0int() interrupt 1
{
 TR0=0;
 speaker=!speaker;
 TH0=timer0h;
 TL0=timer0l;
 TR0=1;
 }
void song()
{
 TH0=timer0h;
 TL0=timer0l;
 TR0=1;
 delay(time);                      
 }

 void main(void)
 {
 unsigned char k,i;
 TMOD=1; //置CT0定时工作方式1
 EA=1;
 ET0=1;//IE=0x82 //CPU开中断,CT0开中断
 while(1)
      {
       i=0; 
       while(i<100){         //音乐数组长度，唱完从头再来       
       k=sszymmh[i]+7*sszymmh[i+1]-1;
       timer0h=FREQH[k];
       timer0l=FREQL[k];
       time=sszymmh[i+2];
       i=i+3;
       song();
        }
      }
  }

15.红外收发演示

#include

sbit LED=P3^3;//红外发射
sbit LED1=P1^3;
sbit IR=P3^2;//红外一体化接收

 bit Flag;

void Init_Timer0(void)
{
 TMOD |= 0x01;       
 TH0=0xf0;                
 TL0=0x00;
 EA=1;                     
 ET0=1;                    
 TR0=1; 
}

void Timer0_isr(void) interrupt 1 using 1
{
 TH0=0x0f;  
 TL0=0x00;
 Flag=!Flag;
}

main()
{

 unsigned int j;
 Init_Timer0();

 while(1)
 {

    LED1=IR;//读取一体化接收头数值
 if(Flag)
    {
     for(j=0;j<27;j++)//大约38KHz
     {
      LED=!LED;//发射管输出
      }
     }
   }
}

16.串口通信

//打开串口调试程序，将波特率设置为2400，无奇偶校验

#include                
                                 

#include                

#ifdef MONITOR51                        
char code reserve [3] _at_ 0x23;        
#endif                                  
                                        
sbit KEY=P3^2;

void delay(unsigned int U)
{
 while(--U);
}

void main (void)
{

#ifndef MONITOR51
    SCON  = 0x50;         
    TMOD |= 0x20;              
    TH1   = 0xf3;               
    TR1   = 1;                 
    TI    = 1;                 
#endif

  while (1)
    {
   
    if(!KEY)
       {
        delay(10000);
        if(!KEY)
          {
          printf ("This programer test ok!n"); 
         printf ("12:25:26n"); 
           }
  }
    }
}

17.PWM调光

#include

sbit LED = P1^2;
unsigned char CYCLE; //定义周期 该数字X基准定时时间 如果是10 则周期是10 x 0.1ms
unsigned char PWM_ON ;//定义高电平时间
void delay(unsigned int cnt)
{
 while(--cnt);
}

main()
{
bit Flag;

TMOD |=0x01;//定时器设置 0.1ms in 12M crystal
TH0=(65536-100)/256;
TL0=(65536-100)%256;//定时0.1mS
IE= 0x82;  //打开中断
TR0=1;

CYCLE = 10;// 时间可以调整 这个是10调整 8位PWM就是256步
while(!Flag)
  {
   delay(20000); //延时时间，从一个亮度到下一个亮度的间隔时间，速度快就能看到连续效果
   PWM_ON++;     //这个使用较长延时，以便能看清楚变化过程
   if(PWM_ON == CYCLE)
     {           //这个里可以添加其他程序 如到最亮时候控制设备
      Flag=1;
   }
  }

 while(Flag)     //亮度递减 同上，是个相反的过程
  {
   delay(20000);
   PWM_ON--;
   if(PWM_ON == 0)
     {
      Flag=0;
   }
  }
}



void tim(void) interrupt 1 using 1
{
static unsigned char count; //
TH0=(65536-100)/256;
TL0=(65536-100)%256;//定时0.1mS

if (count==PWM_ON)
    {
     LED = 1; //灯灭
    }
  count++;
if(count == CYCLE)
    {
    count=0;
 if(PWM_ON!=0) //如果左右时间是0 保持原来状态
    LED = 0;//灯亮

    }

}