max7219.lst

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C51 COMPILER V8.02   MAX7219                                                               05/17/2009 18:24:25 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE MAX7219
OBJECT MODULE PLACED IN max7219.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE max7219.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg51.h>
   2          
   3          
   4          /*macro define*/
   5          #define HIGH     1
   6          #define LOW      0
   7          #define TRUE     1
   8          #define FALSE    0
   9          #define ZERO     0 
  10          #define MSB      0x80
  11          #define LSB      0x01
  12          
  13          /*mode define*/
  14          #define NO_OP         0x00 
  15          #define DECODE_MODE   0x09 
  16          #define INTENSITY     0x0A 
  17          #define SCAN_LIMIT    0x0B 
  18          #define SHUTDOWN      0x0C 
  19          #define DISPLAY_TEST  0x0F
  20          
  21          /*pin define*/
  22          sbit DIN = P2^5; //MAX7219    Serial-Data Input:   rising edge  pin 1
  23          sbit LOAD = P2^6; //MAX7219    Load-Data Input:    rising edge  pin 12 
  24          sbit CLK = P2^7; //MAX7219   Serial-Clock Input:  maximum 10MHz  pin 13 
  25          
  26          /*funtion define*/
  27          void Init_Max7219(void);//initialize max7219 
  28          void Write_Max7219_byte(unsigned char temp);//send max7219 a byte
  29          void Write_Max7219(unsigned char address,unsigned char dat);//send max7219 command and data
  30          void Show_Max7219(unsigned int left,unsigned int right) reentrant;//十进制显示，第一个参数是7219左四位，第
             -二个是右四位
  31          void Byte_Max7219(unsigned char byte_data);//十进制输出一字节数据
  32          void Regprint_Max7219(unsigned char byte_data);//二进制输出一字节数据，用于打印八位寄存器
  33          void Interger_Max7219(unsigned long int interger) reentrant;//显示十进制整形数
  34          
  35          /************************************************************************************
  36                 code of funtions
  37          ************************************************************************************/
  38          
  39          void Write_Max7219_byte(unsigned char temp)
  40          {
  41   1       unsigned char i;
  42   1       for (i=0;i<8;i++)     
  43   1        { 
  44   2      
  45   2         CLK=LOW;
  46   2         
  47   2      
  48   2           DIN=(bit)(temp&MSB);      
  49   2           temp<<=1;
  50   2      
  51   2         CLK=HIGH;
  52   2        }
  53   1      }
  54          
C51 COMPILER V8.02   MAX7219                                                               05/17/2009 18:24:25 PAGE 2   

  55          void Write_Max7219(unsigned char address,unsigned char dat)
  56          { 
  57   1        LOAD=LOW;
  58   1         Write_Max7219_byte(address); 
  59   1         Write_Max7219_byte(dat);
  60   1        LOAD=HIGH;                 
  61   1      }
  62          
  63          void Init_Max7219(void)      
  64          { 
  65   1       Write_Max7219(SHUTDOWN, 0x01);//Normal Operation
  66   1       Write_Max7219(DISPLAY_TEST, 0x00);//Normal Operation
  67   1       Write_Max7219(DECODE_MODE, 0xff);//Code B decode for digits 7-0
  68   1       Write_Max7219(SCAN_LIMIT, 0x07);//Display digits 7-0
  69   1       Write_Max7219(INTENSITY, 0x02);//Duty Cycle 9/32
  70   1      }
  71          
  72          void Show_Max7219(unsigned int left,unsigned int right) reentrant
  73          {
  74   1         unsigned char i,digit_l,digit_r;  
  75   1      
  76   1         for(i=8;i>4;i--)
  77   1         {
  78   2                 digit_l=left%10;
  79   2                 Write_Max7219(i-4,digit_l);
  80   2                 left/=10;
  81   2                       
  82   2                 digit_r=right%10;
  83   2                 Write_Max7219(i,digit_r);
  84   2                 right/=10;
  85   2          }
  86   1      }
  87          
  88          void Byte_Max7219(unsigned char byte_data)
  89          {
  90   1              unsigned char i,digit;
  91   1      
  92   1              for(i=8;i>0;i--)
  93   1              {
  94   2                      digit=byte_data%10;
  95   2                      Write_Max7219(i,digit);
  96   2                      byte_data/=10;
  97   2              }
  98   1      }
  99          
 100          void Regprint_Max7219(unsigned char byte_data)
 101          {
 102   1              unsigned char i,reg_bit,test_bit=0x01;
 103   1      
 104   1              for(i=8;i>0;i--)
 105   1              {
 106   2                      reg_bit=byte_data&test_bit;
 107   2                      Write_Max7219(i,reg_bit);
 108   2                      byte_data=byte_data>>1;
 109   2              }
 110   1      }
 111          
 112          void Interger_Max7219(unsigned long int interger) reentrant
 113          {
 114   1         unsigned char i,digit;  
 115   1      
 116   1         for(i=8;i>0;i--)
C51 COMPILER V8.02   MAX7219                                                               05/17/2009 18:24:25 PAGE 3   

 117   1         {
 118   2                 digit=interger%10;
 119   2                 Write_Max7219(i,digit);
 120   2                 interger/=10;
 121   2          }
 122   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    376    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)