簡單計(jì)算器的設(shè)計(jì)方法

1、簡單計(jì)算器的設(shè)計(jì)#include <</font>reg51.h>#include <</font>intrins.h>#include <</font>ctype.h>            #include <</font>stdlib.h>             #define uchar unsigned char#define uint unsigned in

2、t uchar operand19, operand29;  uchar operator;                      void delay(uint);uchar keyscan();void disp(void);void buf(uint value);uint compute(uint va1,uint va2,uchar optor); uchar code table = 0xc0,0xf9,0xa4,0xb0,0x9

3、9,                0x92,0x82,0xf8,0x80,0x90,0xff;      uchar dbuf8 = 10,10,10,10,10,10,10,10;                     void delay(uint z)uint x,y;for(x=z;x>0;x-)    for(y=11

4、0;y>0;y-);  uchar keyscan()    uchar skey;                              P1 = 0xfe;    while(P1 & 0xf0) != 0xf0)                  

5、0; delay(3);                             while(P1 & 0xf0) != 0xf0)                        switch(P1)                 

6、;                           case 0xee: skey = '7' break;                case 0xde: skey = '8' break;                case 0xbe: skey = '

7、9' break;                case 0x7e: skey = '/' break;                                    default:   skey = '#'        &#

8、160;                while(P1 & 0xf0) != 0xf0)                 ;                  P1 = 0xfd;        while(P1 & 0xf0) != 0xf0)   

9、         delay(3);         while(P1 & 0xf0) != 0xf0)                    switch(P1)                            case 0xed: skey = 

10、9;4' break;                case 0xdd: skey = '5' break;                case 0xbd: skey = '6' break;                case 0x7d: skey = '*' break;  &#

11、160;                                 default:   skey = '#'                         while(P1 & 0xf0) != 0xf0)      

12、0;         ;                   P1 = 0xfb;    while(P1 & 0xf0) != 0xf0)            delay(3);                while(P1 & 0xf0) != 0xf0)

13、                    switch(P1)                            case 0xeb: skey = '1' break;                case 0xdb: skey = '2'

14、break;                case 0xbb: skey = '3' break;                case 0x7b: skey = '-' break;                             

15、      default: skey = '#'                         while(P1 & 0xf0) != 0xf0)                ;                   P1

16、 = 0xf7;    while(P1 & 0xf0) != 0xf0)            delay(3);         while(P1 & 0xf0) != 0xf0)                    switch(P1)               

17、             case 0xe7: skey = '$' break;                case 0xd7: skey = '0' break;                case 0xb7: skey = '=' break;          &#

18、160;     case 0x77: skey = '+' break;                                    default:   skey = '#'                     

19、0;   while(P1 & 0xf0) != 0xf0)                ;                 return skey; void main()        uint value1, value2, value;               uch

20、ar ckey, cut1 = 0, cut2 = 0;        uchar operator;                           uchar i, bool = 0; init:                             

21、0;          buf(0);                                disp();    value = 0;    cut1 = cut2 = 0;    bool = 0;    for(i = 0;i <</font> 9;i+) 

22、           operand1i = '0'        operand2i = '0'                                          while(1)        &#

23、160;   ckey = keyscan();                     if(ckey != '#')                     if(isdigit(ckey)                     

24、0;               switch(bool)                                        case 0:                         

25、;   operand1cut1 = ckey;                            operand1cut1+1 = '0'                            value1 = atoi(operand1);      &#

26、160;                       cut1+;                            buf(value1);                            disp

27、();                            break;                    case 1:                            operand2cut2 = cke

28、y;                            operand2cut2+1 = '0'                            value2 = atoi(operand2);              &

29、#160;             cut2+;                            buf(value2);                            disp();       

30、60;                   break;                                                default: break;          

31、0;                             else if(ckey='+'|ckey='-'|ckey='*'|ckey='/')                            bool = 1;    &#

32、160;               operator = ckey;                buf(0);                dbuf7 = 10;                disp();          &#

33、160;             else if(ckey = '=')                            value = compute(value1,value2,operator);                buf(value);     

34、          disp();                while(1)                                                      

35、   ckey = keyscan();                    if(ckey = '$')                                  goto init;               

36、;     else                                                    buf(value);                       

37、60;   disp();                                                                else if(ckey = '$')       

38、0;        goto init;                disp();       uint compute(uint va1,uint va2,uchar optor)    uint value;     switch(optor)            case '+' : val

39、ue = va1+va2;    break;        case '-' : value = va1-va2;    break;        case '*' : value = va1*va2;    break;        case '/' : value = va1/va2;    break;    

40、0;           default :  break;        return value;  void buf(uint val)    uchar i;    if(val = 0)            dbuf7 = 0;        i = 6;       

41、0;    else        for(i = 7; val > 0; i-)                    dbufi = val % 10;            val /= 10;                for( ; i > 0; i-) 

42、       dbufi = 10;  void disp(void)    uchar bsel, n;        bsel=0x01;    for(n=0;n<</font>8;n+)             P2=bsel;        P0=tabledbufn;       

43、; bsel=_crol_(bsel,1);        delay(3);        P0=0xff;    音樂播放器  /*  歌曲選擇時(shí)應(yīng)按住設(shè)置間3秒以上，然后按上或下鍵進(jìn)行選擇，然后再按設(shè)置鍵退出 */ #include<reg52.h> sbit spek=P37;  /聲音輸出端 sbit set=P32;  /設(shè)定及退出鍵

44、,按奇數(shù)次為設(shè)定功能；偶數(shù)次為退出功能 sbit up=P31;  /上一曲 sbit down=P30;  /下一曲 bit flag1,flag2;  /按鍵掃描標(biāo)志位，新鍵值標(biāo)志位 unsigned char f_t,n,i,key,k_max; /音符頻率對(duì)應(yīng)的二分之一周期值，節(jié)拍常數(shù)值，查表用計(jì)數(shù)器，鍵值，最大鍵值 unsigned char *p_music;  /指向音樂數(shù)

45、據(jù)數(shù)組的指針 void timer_ms(unsigned char tim);  /毫秒級(jí)延時(shí)函數(shù)聲明 void timer_us(unsigned char t);  /微秒級(jí)延時(shí)函數(shù) void key_scan(void);  /按鍵掃描函數(shù) void key_manage();  /鍵值處理函數(shù)  /格式為：頻率常數(shù)，節(jié)拍常數(shù)，頻率常數(shù)，節(jié)拍常數(shù) unsign

46、ed char code music_table1=0x18,0x30,0x1c,0x10,0x20,0x40,0x1c,0x10,0x18, 0x10,0x20,0x10,0x1c,0x10,0x18,0x40,0x1c,0x20,0x20,0x20,0x1c,0x20,0x18,0x20,0x20,0x80, 0xff,0x20,0x30,0x1c,0x10,0x18,0x20,0x15,0x20,0x1c,0x20,0x20,0x20,0x26,0x40,0x20,0x20, 0x2b,0x20,0x26,0x20,0x20,0

47、x20,0x30,0x80,0xff,0x20,0x20,0x1c,0x10,0x18,0x10,0x20,0x20, 0x26,0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20,0x20,0x1c,0x10,0x18,0x10,0x20,0x20,0x26, 0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20,0x30,0x1c,0x10,0x18,0x20,0x15,0x20,0x1c,0x20, 0x20,0x20,0x26,0x40,0x20,0x20,0x2b,0x20,0x26,0x20,0x2

48、0,0x20,0x30,0x80,0x20,0x30,0x1c, 0x10,0x20,0x10,0x1c,0x10,0x20,0x20,0x26,0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20,0x15, 0x1f,0x05,0x20,0x10,0x1c,0x10,0x20,0x20,0x26,0x20,0x2b,0x20,0x30,0x20,0x2b,0x40,0x20, 0x30,0x1c,0x10,0x18,0x20,0x15,0x20,0x1c,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2b,

49、0x20, 0x26,0x20,0x20,0x20,0x30,0x30,0x20,0x30,0x1c,0x10,0x18,0x40,0x1c,0x20,0x20,0x20,0x26, 0x40,0x13,0x60,0x18,0x20,0x15,0x40,0x13,0x40,0x18,0x80,0x00; /八月桂花香 unsigned char code music_table2=0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80, 0x26,0x

50、20,0x30,0x20,0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20, 0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20,0x30,0x20,0x30,0x20, 0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20,0x30,0x20,0x30,0x20,0x39,0x10,0x26,

51、0x10, 0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10,0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20, 0x2b,0x40,0x40,0x20,0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20, 0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x

52、20,0x20,0x80,0x1c,0x20, 0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10, 0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80,0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10, 0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80

53、,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20, 0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10,0x20,0x10,0x2b,0x10, 0x26,0x30,0x30,0x80,0x00;  /祝你平安 unsigned char code music_table3=0x20,40,0x26,20,0x20,20,0x17,80,0x1c,40,0x17,40,0x20

54、,80,0x20, 40,0x2f,20,0x2a,20,0x26,40,0x2a,20,0x2f,20,0x2a,80,0xff,0x20,40,0x26,20,0x20,20,0x17,60,0x19,20, 0x1c,40,0x17,40,0x20,80,0x20,40,0x2a,20,0x26,20,0x24,60,0x32,20,0x2f,80,0xff,0x1c,40,0x17,40,0x17, 80,0x19,40,0x1c,20,0x19,20,0x17,80,0x1c,20,0x19,20,0x17,20,0x1c,20,0x1c,20,0x20

55、,20,0x26,20,0x2f,20, 0x2a,80,0xff,0x20,40,0x26,20,0x20,20,0x17,60,0x19,20,0x1c,40,0x17,40,0x20,80,0x20,40,0x2a,20,0x26, 20,0x24,60,0x32,20,0x2f,80,0xff,0x20,40,0x26,20,0x20,20,0x17,80,0x1c,40,0x17,40,0x20,80,0x20,40, 0x2f,20,0x2a,20,0x26,40,0x2a,20,0x2f,20,0x2a,80,0xff,0x20,40,0x26,20

56、,0x20,20,0x17,60,0x19,20,0x1c, 40,0x17,40,0x20,80,0x20,40,0x2a,20,0x26,20,0x24,60,0x32,20,0x2f,80,0;  /送別  main()      spek=0;     P3=0x7f;     TMOD=0x01;  /T0工作于方式1，即16位定時(shí)器模式 

57、0;   IE=0x82;  /開總中斷，T0中斷     flag2=0;  /     flag1=0;     key=1;       k_max=3;  /最大鍵值（取值范圍1254）     n=0;  &#

58、160;  i=0;  p_music=music_table1;  /指針賦初值     while (1)              switch (p_musici)             &

59、#160;      case 0x00: i=0;  /歌曲完，則停止0.5S后重新開始             timer_ms(250);  /延時(shí)0.25ms             timer_ms(250);

60、             break;         case 0xff: i+;  /遇到休止符則停止100us             timer_ms(250);   &#

61、160;timer_ms(250);             break;         default:   f_t=p_musici+;             n=p_musici+;  &#

62、160;          spek=1;             TR0=1;             while (n!=0)        &#

63、160;                     spek=spek;                 timer_us(4*f_t);  /改變f_t前面的系數(shù)可以調(diào)整音符頻率的高低 &#

64、160;                     TR0=0;             spek=0;    if(set=0)       

65、0; key_scan();     key_manage();                     /* 函數(shù)名稱： 定時(shí)器0的中斷處理程序 函數(shù)功能： 完成10毫秒定時(shí) 入口參數(shù)：  出口參數(shù)：  其  

66、0;   它：  */ void timer0() interrupt 1 using 2      TH0=(65536-10000)/256;  /定時(shí)10毫秒     TL0=(65536-10000)%256;     n-;   /* 函數(shù)名稱： 延

67、時(shí)程序 函數(shù)功能： 完成微秒級(jí)的延時(shí) 入口參數(shù)： t為需延時(shí)的時(shí)間（取值范圍1255；延時(shí)時(shí)間51275us） 出口參數(shù)：  其      它：  */ void timer_us(unsigned char t)      while (-t);  /本語句執(zhí)行一次需5us的時(shí)間   /

68、* 函數(shù)名稱： 按鍵掃描函數(shù) 函數(shù)功能： 完成按鍵掃描處理 入口參數(shù)： 應(yīng)為在中斷函數(shù)中被調(diào)用，所以不能有參數(shù)傳遞 出口參數(shù)：  其      它：  */ void key_scan(void)      timer_ms(10);  /延時(shí)10ms等待按鍵狀態(tài)穩(wěn)定     i

69、f (set=0)  /再次確認(rèn)                 while (set=0);  /等待按鍵松開         flag1=1;  /該位為1，表示進(jìn)入按鍵掃描處理；為0，表示本次按鍵掃描處理完成    

70、;     while (flag1)                         if (up=0)  /加一鍵            

71、;                  timer_ms(10);                 if (up=0)          &#

72、160;                           while (!up);                   

73、60; key+;                     if (key>k_max) key=1;                     

74、                      if (down=0)  /減一鍵                      

75、0;       timer_ms(10);                 if (down=0)                     

76、;                 while (!down);                     key-;        

77、;             if (key<1) key=k_max;                               &

78、#160;  if (set=0)  /退出鍵                              timer_ms(10);          

79、;       if (set=0)                                      while (se

80、t=0);                     flag1=0;  /表示本次按鍵掃描處理完成                     flag2=1;&#

81、160; /該位置1，表示有新鍵值要處理                              /以上鍵值處理的范圍為1到254個(gè)鍵值            

82、0;    /* 函數(shù)名稱： 鍵值處理函數(shù) 函數(shù)功能： 完成按鍵鍵值的處理 入口參數(shù)： 應(yīng)為在中斷函數(shù)中被調(diào)用，所以不能有參數(shù)傳遞 出口參數(shù)：  其      它：  */void key_manage()      flag2=0;     switch (

83、key)          case 1: p_music=music_table1;  /鍵值為1 播放第一首樂曲             goto kh1;     case 2: p_music=&music_table20;

84、  /鍵值為2 播放第2首樂曲             goto kh1;  case 3: p_music=&music_table30;  /鍵值為3 播放第3首樂曲             goto kh1

85、;       default:  key=1;              p_music=music_table1; kh1: TH0=(65536-10000)/256;      TL0=(65536-10000)%256;      break;       n=0;     i=0; &#