spi.lst

通过车载终端采集GPS数据

C51 COMPILER V7.09   SPI                                                                   09/16/2008 14:30:38 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE SPI
OBJECT MODULE PLACED IN .\output\spi.obj
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE usb\spi.c LARGE BROWSE INCDIR(audio\;eeprom\;extendUART\;flash\;gps\;inter\
                    -;key\;mcu\;menu\;usb\;gprs\;main\;1wire\) DEBUG OBJECTEXTEND PRINT(.\output\spi.lst) OBJECT(.\output\spi.obj)

line level    source

   1          /*****************************************************************
   2          *SPI软件仿真程序
   3          *SPI总线接口，高位先发送，数据在时钟的上升沿发送和接收。
   4          *             正常情况下CLK为高电平。
   5          ******************************************************************/
   6          #include "w77e532.h"
   7          #include "spi.h"
   8          
   9          
  10          void spi_init(void)
  11          {
  12   1          SPI_CLK = 1;
  13   1          SPI_MOSI = 1;
  14   1          SPI_MISO = 1;
  15   1      }
  16          
  17          void spi_write(char value)//mode 3
  18          {
  19   1          unsigned char bitCount;
  20   1          unsigned char bitTmp;
  21   1      
  22   1          bitTmp = value;
  23   1          for( bitCount=0; bitCount<8; bitCount++)
  24   1          {
  25   2              if( bitTmp & 0x80 )
  26   2                  SPI_MOSI = 1;
  27   2              else
  28   2                  SPI_MOSI = 0;
  29   2      
  30   2              SPI_CLK = 0;
  31   2              SPI_CLK = 1;
  32   2      
  33   2              bitTmp <<= 1;
  34   2          }    
  35   1          
  36   1      }
  37          
  38          code char SPIREAD_ARRAY[8] = {128, 64, 32, 16, 8, 4, 2, 1};
  39          char spi_read(void)//mode 0
  40          {
  41   1          data unsigned char bitCount;
  42   1          data unsigned char bitTmp;
  43   1      
  44   1          bitTmp = 0;
  45   1          for( bitCount=0; bitCount<8; bitCount++)
  46   1          {
  47   2              SPI_CLK = 1;//0;
  48   2              SPI_CLK = 0;//1;//cj mod
  49   2      
  50   2              SPI_MISO = 1;
  51   2              if( SPI_MISO )
  52   2                  bitTmp += SPIREAD_ARRAY[bitCount];
  53   2      
  54   2      //        if( bitCount != 7 )
C51 COMPILER V7.09   SPI                                                                   09/16/2008 14:30:38 PAGE 2   

  55   2      //            bitTmp <<= 1;        
  56   2          }
  57   1      
  58   1          return(bitTmp);
  59   1      }
  60          /*
  61          char spi_read(void)//mode 0
  62          {
  63              unsigned char bitCount;
  64              unsigned char bitTmp;
  65          
  66              bitTmp = 0;
  67              for( bitCount=0; bitCount<8; bitCount++)
  68              {
  69                  SPI_CLK = 1;//0;
  70                  SPI_CLK = 0;//1;//cj mod
  71          
  72                  SPI_MISO = 1;
  73                  if( SPI_MISO )
  74                      bitTmp |= 1;
  75          
  76                  if( bitCount != 7 )
  77                      bitTmp <<= 1;        
  78              }
  79          
  80              return(bitTmp);
  81          }
  82          */
  83          
  84          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     67    ----
   CONSTANT SIZE    =      8    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       2
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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