C51 COMPILER V7.06   UART                                                                  09/08/2007 06:50:51 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE UART
OBJECT MODULE PLACED IN uart.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE uart.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1              #include <reg51.h>
   2                  #include "MAX485.h"
   3               uchar temp[8];
   4              data uchar Tbuffer[TCOUNT];  //定義發送緩沖區
   5              data uchar Rbuffer[RCOUNT];//定義接受緩沖器
   6              data unsigned char  Tpointer;          //定義當前位子指針
   7              data unsigned char  Rpointer;
   8              data uchar count_10ms; 
   9              uchar time_over_flag;
  10                  void serial_init(void);
  11              uchar RS485(){
  12   1           
  13   1                                 receive();
  14   1                                      if(Rbuffer[0] == 'A'){
  15   2                                      temp[2] = Rbuffer[2];
  16   2                      return(0);
  17   2                                 }
  18   1                                  else {
  19   2                                  return(-1);}
  20   1                         }
  21          
  22          void command(void){
  23   1                                Tpointer = 0x00;
  24   1                     while(Tpointer<TCOUNT) {                         /* 發送緩沖區初始化 */
  25   2                                              Tbuffer[Tpointer] = 'T';
  26   2                                              Tpointer++;
  27   2                                       }    
  28   1                                      send();
  29   1         }
  30          
  31          void send(void){
  32   1                      RE = 1;
  33   1                  Tpointer=0x00;
  34   1                      EA = 1;
  35   1                      TI = 1;
  36   1              while(Tpointer <= TCOUNT);            /* 等待全部數據幀發送完畢 */  
  37   1                      RE = 0;
  38   1              }
  39          
  40              void receive(void){
  41   1                      RE = 0;
  42   1              Rpointer = 0 ;
  43   1                      time_over_flag = 0;
  44   1                      EA = 0;
  45   1              ET0=1; //關閉定時器T0中斷
  46   1              TR0=1; //停止定時器T0
  47   1                      ES = 1;
  48   1                      PS = 1;
  49   1                      EA = 1;
  50   1                  while((Rpointer+1 <= RCOUNT)&&!time_over_flag);
  51   1                  ET0 = 0;
  52   1                      TR0 = 0;
  53   1                      
  54   1              }
  55          
C51 COMPILER V7.06   UART                                                                  09/08/2007 06:50:51 PAGE 2   

  56              /* 發送中斷服務函數 */
  57              void serial (void) interrupt 4 using 3 {
  58   1             if (RI){   
  59   2                     RI=0;                                     /* 清接收中斷標志 */
  60   2                Rbuffer[Rpointer++]=SBUF;                                            
  61   2                if((Rpointer+1 == RCOUNT)&&!time_over_flag)  return;                   /* 如果已接收完全部數據幀, 則此次通信結