max7219.lst

8位LED显示驱动芯片MAX7219的驱动程序

C51 COMPILER V6.20c  MAX7219                                                               12/18/2002 11:18:22 PAGE 1   


C51 COMPILER V6.20c, COMPILATION OF MODULE MAX7219
OBJECT MODULE PLACED IN Max7219.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE Max7219.c DEBUG OBJECTEXTEND

stmt level    source

   1          #include "intrins.h"
   2          #include "At89x51.h"
   3          /////////////////////////////////////
   4          //采用P1口作控制
   5          //11.0592的晶体
   6          //RST=20K
   7          ////////////////////////////////////
   8          #define CLK7219    P2_7
   9          #define DIN7219    P2_6
  10          #define CS7219     P2_5
  11          max7219(unsigned int dat)
  12          {
  13   1      	char i;
  14   1      	CS7219=0;
  15   1      	_nop_();
  16   1      	
  17   1      	for(i=0;i<16;i++)
  18   1      	{
  19   2      		DIN7219=(dat>>(15-i))&0x1;
  20   2      		CLK7219=1;
  21   2      		_nop_();
  22   2      		CLK7219=0;
  23   2      	};
  24   1      
  25   1      	CS7219=1;
  26   1      }
  27          main()
  28          {
  29   1      	int i;
  30   1      	char j;
  31   1      	unsigned int freshdata;
  32   1      	CLK7219=0;
  33   1      	for(i=0;i<31000;i++);
  34   1      ///////////////////////////////////////////////////////
  35   1      //7219初始化
  36   1      	max7219(0x0C01);    //shutdown register format 
  37   1      	max7219(0x09FF);    //decode mode code B 7-0
  38   1      	max7219(0x0A0F);    //intensity register format 
  39   1      	max7219(0x0B07);    //sacan limit register format 
  40   1      	max7219(0x0F00);    //display test register format 
  41   1      ////////////////////////////////////////////////////////
  42   1       //display data
  43   1      	max7219(0x0101);   
  44   1      	max7219(0x0202);    
  45   1      	max7219(0x0303);     
  46   1      	max7219(0x0404);     
  47   1      	max7219(0x0505);     
  48   1      	max7219(0x0606);     
  49   1      	max7219(0x0707);     
  50   1      	max7219(0x0808);     
  51   1      	j=0;
  52   1      	while(1)
  53   1      	{
  54   2      		freshdata=0;
  55   2      		P1_0=~P1_0;
C51 COMPILER V6.20c  MAX7219                                                               12/18/2002 11:18:22 PAGE 2   

  56   2      		for(i=0;i<31000;i++);
  57   2      
  58   2      		max7219(0x0100|j);   
  59   2      		max7219(0x0200|j);    
  60   2      		max7219(0x0300|j);     
  61   2      		max7219(0x0400|j);     
  62   2      		max7219(0x0500|j);     
  63   2      		max7219(0x0600|j);     
  64   2      		max7219(0x0700|j);     
  65   2      		max7219(0x0800|j);     
  66   2      
  67   2      		if(j<9)
  68   2      			j++;
  69   2      		else 
  70   2      			j=0;
  71   2      	}
  72   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    278    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       2
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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