max7219.lst

基于ARM的按键测试开发.很实用也很普遍.

C51 COMPILER V7.50   MAX7219                                                               05/27/2008 11:08:27 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE MAX7219
OBJECT MODULE PLACED IN max7219.OBJ
COMPILER INVOKED BY: D:\Program Files\Keil51\C51\BIN\C51.EXE max7219.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          
   2          #include <max7219.h>
   3          #include <INTRINS.H>
   4          
   5          extern unsigned char code ascii[];
   6          
   7          void WriteToMax7219 (unsigned char Cmd ,unsigned char Data)
   8          {
   9   1         unsigned char tLoop  = 0;
  10   1         unsigned int   tMask = 0x0001;
  11   1         unsigned int   tWord = 0;
  12   1      
  13   1      
  14   1         tWord = Cmd;
  15   1         tWord = (tWord << 8) + Data;
  16   1         CLK0  = 0;
  17   1         CS0   = 0;
  18   1         for(tLoop=0,tMask=0x8000; tLoop<16 ;tLoop++)
  19   1         {
  20   2         
  21   2              DIN0=tWord&tMask;
  22   2      
  23   2                      _nop_();   
  24   2                      _nop_();        //rising edge
  25   2                      CLK0=1;
  26   2                      if(tLoop==15)   //Take CS high (while CLK is still high after clocking in                    
  27   2                      CS0=1;
  28   2              CLK0=0;
  29   2                      DIN0=0;
  30   2         
  31   2                      tMask=tMask>>1; 
  32   2        }
  33   1        CS0=1;
  34   1      }
  35          
  36          
  37          void InitialMax7219(void)
  38          {
  39   1        unsigned char i; 
  40   1        CS0=1;
  41   1        CLK0=0;
  42   1      //Enter display test mode 
  43   1      //WriteToMax7219(0x0F,0x01);
  44   1      //Exit display test mode
  45   1        WriteToMax7219(0x0F,0x00);
  46   1      
  47   1      // Exit shutdown mode -->normal mode
  48   1        WriteToMax7219(0x0C,0x01);
  49   1       
  50   1      //Set globalk intensity to full-scale 
  51   1        WriteToMax7219(0x0A ,0x06);
  52   1      // WriteToMax7219(0x02 ,0x08);
  53   1      
  54   1      //Decode mode enabled 0-7 BCD decode
  55   1        WriteToMax7219(0x09,0xFF) ;
C51 COMPILER V7.50   MAX7219                                                               05/27/2008 11:08:27 PAGE 2   

  56   1      
  57   1      //Display Digit 0-7 only
  58   1        WriteToMax7219(0x0B,0x07) ;
  59   1      
  60   1      //reset all 8 leds to blank
  61   1        for(i=2;i<9;i++)
  62   1        {
  63   2               WriteToMax7219(i,ascii[8]);
  64   2        }
  65   1        WriteToMax7219(0x01,0x0E);
  66   1      
  67   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    139    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       3
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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