rs485.lst

本代码为SPI/I2C转双串口驱动程序。开发环境为Keil c51.

C51 COMPILER V7.09   RS485                                                                 12/07/2005 13:58:16 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE RS485
OBJECT MODULE PLACED IN RS485.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE RS485.C OPTIMIZE(2,SPEED) BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "sc16is752.h"
   2          
   3          //-----------------------------
   4          //Multidrop mode
   5          //-----------------------------
   6          
   7          void Multidrop()
   8          {
   9   1      
  10   1              WriteRegister(LCR,ChannelA,0x2B);       //0011 1011, set parity
  11   1                                                                                      //Paritybit bit5=1: Address byte
  12   1                                                                                      //Paritybit bit5=0: Data byte
  13   1              WriteRegister(MCR,ChannelA,0x02);       //Force RTS low level
  14   1      
  15   1              WriteRegister(EFCR,ChannelA,0x31);      //0011 0001 , 485 RTS control,Enable 485
  16   1              WriteRegister(FCR,ChannelA,0x06);       //enable ,reset FIFO
  17   1              WriteRegister(FCR,ChannelA,0x01);       //enable  FIFO  
  18   1      
  19   1      
  20   1      //      WriteRegister(IER,ChannelA,0x04);       //0000 0100     Enable line interrupt   
  21   1      
  22   1      }
  23          
  24          
  25          //-----------------------------
  26          //Auto address mode
  27          //-----------------------------
  28          void AutoAddress(char Address)
  29          {
  30   1              WriteRegister(LCR,ChannelA,0xBF);       //Enter enhance mode            
  31   1              WriteRegister(EFR,ChannelA,0x20);
  32   1              WriteRegister(Xoff2,ChannelA,Address);
  33   1      
  34   1      
  35   1              WriteRegister(LCR,ChannelA,0x3B);       //0011 1011, set parity
  36   1                                                                                      //Paritybit bit5=1: Address byte
  37   1                                                                                      //Paritybit bit5=0: Data byte
  38   1              WriteRegister(MCR,ChannelA,0x02);       //Force RTS low level
  39   1      
  40   1              WriteRegister(EFCR,ChannelA,0x31);      //0011 0001 , 485 RTS control,Enable 485
  41   1      
  42   1              WriteRegister(FCR,ChannelA,0x06);       //enable ,reset FIFO
  43   1              WriteRegister(FCR,ChannelA,0x01);       //enable  FIFO  
  44   1      
  45   1      //      WriteRegister(IER,ChannelA,0x04);       //0000 0100     Enable line interrupt   
  46   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    121    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
C51 COMPILER V7.09   RS485                                                                 12/07/2005 13:58:16 PAGE 2   

   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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