spi_basic.lst

本源码是c8051f330使用spi口在spi模式下读写SD卡

C51 COMPILER V7.50   SPI_BASIC                                                             06/04/2008 15:52:38 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE SPI_BASIC
OBJECT MODULE PLACED IN spi_basic.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.exe spi_basic.c DB OE

line level    source

   1          //spi接口低层输入输出接口
   2          
   3          #include "inc.h"
   4          
   5          sbit CS = P0^7;
   6          
   7          
   8          void spi_sendbyte(uint8 byte)                             //发送一个字节
   9          {
  10   1      
  11   1              SPI0DAT = byte;
  12   1              while(SPIF == 0);
  13   1              SPIF = 0;                                 //等待SPI忙标志位清零
  14   1      
  15   1      }
  16          
  17          uint8 spi_recbyte(void)                                           //接收一个字节
  18          {       
  19   1              uint8 rec ;
  20   1      
  21   1              SPI0DAT = 0xFF;
  22   1              while(SPIF == 0);
  23   1              SPIF = 0;
  24   1              rec = SPI0DAT;
  25   1      
  26   1      
  27   1              return(rec);
  28   1              
  29   1      }
  30          
  31          void spi_cs_clr(void)                                            //拉低CS
  32          {
  33   1              CS = 0;
  34   1      }
  35          
  36          void spi_cs_set(void)                                            //拉高CS
  37          {
  38   1              CS = 1;
  39   1      
  40   1      }
  41          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     25    ----
   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)