spi_main.lst

利用805151单片机实现spi总线模拟。

C51 COMPILER V8.08   SPI_MAIN                                                              06/02/2007 10:16:47 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE SPI_MAIN
OBJECT MODULE PLACED IN SPI_Main.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE SPI_Main.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          
   2          #define uchar   unsigned char
   3          #define uint    unsigned int
   4          #define ulong   unsigned long
   5          //---------------------------
   6          #include <REG52.H>      
   7          #include<STDIO.H>
   8          
   9           //---------------------------
  10          sbit    SPICLK  =       P1^0;
  11          sbit    MOSI    =       P1^1;
  12          sbit    MISO    =       P1^2;
  13          sbit    SS              =       P1^3;
  14          //---------------------------
  15          void    Nop(void)
  16                  {
  17   1                      ;
  18   1              }
  19          void    Delay(uchar t)
  20                  {
  21   1                      while(t--){;}
  22   1              }
  23          
  24          uchar   Data_Receive(void)
  25                  {
  26   1                      uchar   i,dat=0,temp;
  27   1                      bit             bt;             
  28   1                      SPICLK=1;
  29   1                      MISO=1;
  30   1                      SS=0;                   //选中器件
  31   1                      Nop();
  32   1                      Nop();
  33   1                      for(i=0;i<8;i++)
  34   1                              {       
  35   2                                      SPICLK=1;
  36   2                                      Nop();
  37   2                                      Nop();
  38   2                                      Nop();
  39   2                                      SPICLK=0;
  40   2                                      Nop();
  41   2                                      Nop();                          
  42   2                                      bt=MISO;
  43   2                                      if(bt)
  44   2                                              temp=0x01;
  45   2                                      else    temp=0x00;
  46   2                                      dat=(dat<<1);                           
  47   2                                      dat=(dat|temp);                         
  48   2                              }
  49   1                      SS=1;
  50   1                      SPICLK=1;               
  51   1                      return  dat; 
  52   1              }
  53          void    main(void)
  54                  {
  55   1                      uchar   exdat;
C51 COMPILER V8.08   SPI_MAIN                                                              06/02/2007 10:16:47 PAGE 2   

  56   1                      uchar   i=0;
  57   1                      uchar   code table[10]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,
  58   1                                0x7F,0x6F};
  59   1                      P2=0;                   
  60   1                      while(1)
  61   1                              {
  62   2                                      exdat=Data_Receive();
  63   2                                      P0=table[exdat];
  64   2                                      for(i=0;i<200;i++)                      
  65   2                                      Delay(200);                     
  66   2                                                      
  67   2                              }
  68   1              }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     97    ----
   CONSTANT SIZE    =     10    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----       1
END OF MODULE INFORMATION.


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