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  • C51單片機產生不用波形圖的設計
    C51單片機產生不用波形圖的設計
  • C51單片機產生不用波形圖的設計
  •   發布日期: 2019-05-28  瀏覽次數: 1,352

    單片機產生方波、鋸齒波、三角波、梯形波,頻率可調

    #include

     

    #defineucharunsignedchar

    #defineuintunsignedint

    unsignedcharx=0,m=0,y=128;

    sbitWR_DA=P2^1;

    sbitCS_DA=P2^0;//DA與 單片機 的接口

    sbitS0=P3^0;//波形選擇,每次按下將產生不同的波形

    sbitS1=P3^1;//頻率減

    sbitS2=P3^2;//頻率加

    sbitS3=P3^3;//調節方波的占空比

    C51單片機產生不用波形圖的設計

    ucharcodeSinTab[256]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5

    ,0xc7,0xca,0xCC,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5

    ,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd

    ,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda

    ,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99

    ,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51

    ,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16

    ,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00

    ,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15

    ,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e

    ,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80};

    voiddelayms(uintt)

    {

    uinti;

    while(t--)

    {

    for(i=0;i《125;i++);//對于11.0592M時鐘,約延時1ms

    }

    }

    voiddelay(uintt)

    {

    uinTI;

    for(i=t;i》0;i--);

    }

    voidtime0_init()

    {

    TMOD|=0x01;//定時器設置16位

    TH0=-50000/256;

    TL0=-50000%256;//初始化值

    ET0=1;

    TR0=1;

    EA=1;

    }

    voidTIme0_int(void)interrupt1

    {

    TR0=0;//關閉定時器

    TH0=-50000/256;

    TL0=-50000%256;//重裝初值

    if(S0==0)

    {

    delayms(10);//按鍵消抖

    if(S0==0)m++;

    while(!S0);//松手檢測

    }

    if(S1==0)

    {

    delayms(10);

    if(S1==0)x=x+1;

    while(!S1);//松手檢測

    }

    if(S2==0)

    {

    delayms(10);

    if(S2==0)x=x-1;

    while(!S2);//松手檢測

    }

    if(S3==0)

    {

    delayms(10);

    if(S3==0)y=y+5;

    while(!S3);//松手檢測

    }

    if(y》254)y=0;

    if(m》5)m=0;

    if(x》50)x=0;

    TR0=1;//啟動定時器

    }

    voidfangbo()//方波

    {

    uchari,j;

    j=255-y;

    CS_DA=0;

    WR_DA=0;

    for(i=y;i》0;i--)

    {

    P0=0;

    delay(x);

    }

    while(j--)

    {

    P0=255;

    delay(x);

    }

    }

    voidjuchi()//鋸齒波

    {

    uchari;

    CS_DA=0;

    WR_DA=0;

    for(i=255;i》0;i--)

    {

    P0=i;

    delay(x);

    }

    }

    voidsanjiao()//三角波

    {

    uchari;

    CS_DA=0;

    WR_DA=0;

    for(i=0;i《255;i++)

    {

    P0=i;

    delay(x);

    }

    while(i--)

    {

    P0=i;

    delay(x);

    }

    }

    voidTIxing()//梯形波

    {

    uchari=255,j,k;

    CS_DA=0;

    WR_DA=0;

    while(i--)

    {

    P0=i;

    delay(x);

    }

    for(j=0;j《100;j++)

    {

    P0=0;

    delay(x);

    }

    for(k=0;k《255;k++)

    {

    P0=k;

    delay(x);

    }

    }

    voidsin()//正弦波

    {

    uchara;

    CS_DA=0;

    WR_DA=0;

    for(a=0;a《255;a++)

    {

    P0=SinTab[a];

    delay(x);

    }

    }

    main()

    {

    TIme0_init();

    while(1)

    {

    switch(m)

    {

    case0:

    fangbo();//方波

    break;

    case1:

    juchi();//鋸齒波

    break;

    case2:

    sanjiao();//三角波

    break;

    case3:

    sin();//正弦波

    break;

    case4:

    tixing();//梯形波

    break;

    default:fangbo();

    }

    }

    }


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