C51 COMPILER V7.20   UART                                                                  11/13/2004 14:51:06 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE UART
OBJECT MODULE PLACED IN UART.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE UART.C LARGE OPTIMIZE(6,SPEED) BROWSE ORDER NOINTPROMOTE DEBUG OBJECTEXTEND

line level    source

   1          #include        <reg52.h>
   2          #include        <string.h>
   3          #include        <intrins.h>
   4          //#include      "init.h"
   5          #include        "uart.h"
   6          #include        "xsp.h"
   7          
   8          
   9          static data unsigned int                UartSend_rp, UartSend_wp;
  10          static data unsigned int                UartRecv_rp, UartRecv_wp;
  11          
  12          unsigned char           UartSendBuffer[UART_BUFFER_SIZE];
  13          unsigned char           UartRecvBuffer[UART_BUFFER_SIZE];
  14          
  15          unsigned char           GPRSRecvBuff[UART_RECV_SIZE];   
  16          unsigned char           GPRSSendBuff[UART_RECV_SIZE];   
  17          unsigned char           GPRSSaveBuff[UART_RECV_SIZE];   
  18          
  19          static  data unsigned int               GPRSRecvSize;                           // 接收緩沖區(qū)的當(dāng)前位置
  20          static  data unsigned char      GPRSDBusFlag;
  21          
  22          //unsigned char         UartData[UART_RECV_SIZE];
  23          
  24          //void UART_init(void);
  25          //void UARTSend(BYTE * Data,BYTE LenStr);
  26          
  27          
  28          //***********************************************************************
  29          //串行口初始化
  30          void UART_init(void){
  31   1              TMOD&=0x0f;
  32   1              TMOD|=0x20;        //定時器1工作在方式2(自動重裝載)
  33   1              SCON=0x50;         //設(shè)定串行口工作方式為方式1;允許接收
  34   1              PCON=0;
  35   1              TH1=USART_BAND;
  36   1              TR1=1;
  37   1              ES=1;
  38   1              UartSend_wp = UartSend_rp = 0;
  39   1              UartRecv_wp = UartRecv_rp = 0;
  40   1      }
  41          
  42          //----------------------------------------------------------------------------------
  43          //串行口發(fā)送數(shù)據(jù)
  44          
  45          void UARTSend(unsigned char *a, unsigned char n)
  46          {
  47   1      //    bit intTI;
  48   1      //    intTI=0;
  49   1          while (n > 0) {
  50   2              UartSendBuffer[UartSend_wp++] = *a++;
  51   2              UartSend_wp &= UART_BUFFER_MASK;
  52   2              n--;
  53   2          }
  54   1      //      if (!intTI) {TI=1;intTI=1;}
  55   1          TI=1;
C51 COMPILER V7.20   UART                                                                  11/13/2004 14:51:06 PAGE 2   

  56   1      }
  57          
  58          unsigned char UARTReceive(unsigned char *a, unsigned char n)
  59          {
  60   1          unsigned char               ReceiveCount = 0;
  61   1      
  62   1          while (n > 0 && UartRecv_wp != UartRecv_rp) {
  63   2              *a++ = UartRecvBuffer[UartRecv_wp++];
  64   2              UartRecv_wp &= UART_BUFFER_MASK;
  65   2              ReceiveCount++;
  66   2              n--;
  67   2          }
  68   1          return ReceiveCount;
  69   1      }
  70          
  71          //-----------------------------------------------------------------------------------
  72          //串行口數(shù)據(jù)發(fā)送與接收中斷函數(shù)
  73          void UartInt() interrupt 4 {
  74   1              if (RI) {
  75   2                  RI=0;
  76   2                  UartRecvBuffer[UartRecv_rp++] = SBUF;
  77   2                  UartRecv_rp &= UART_BUFFER_MASK;
  78   2              }
  79   1              else{
  80   2                  TI=0;
  81   2                  if (UartSend_rp != UartSend_wp) {
  82   3                      SBUF = UartSendBuffer[UartSend_rp++];
  83   3                      UartSend_rp &= UART_BUFFER_MASK;
  84   3                  }
  85   2              }
  86   1      }
  87          
  88          
  89          
  90          unsigned char GPRSRecvResponse(void)
  91          {
  92   1      data    unsigned int            UartReceivedBytes;
  93   1      data    unsigned int            UartBuffPoint;
  94   1      static data  unsigned int       GPRSDBusPos1;
  95   1      static data  unsigned int       GPRSDBusPos2;
  96   1      data    unsigned int            i;
  97   1      data    unsigned int            j;
  98   1      //idata    unsigned char                Result;
  99   1      data    unsigned char           DataLength;
 100   1      data    unsigned char           XorSum;
 101   1      
 102   1          if ((UartReceivedBytes = UARTReceive(GPRSRecvBuff + GPRSRecvSize, UART_RECV_SIZE)) == 0)
 103   1              return FALSE;
 104   1      
 105   1          GPRSRecvSize += UartReceivedBytes;
 106   1      
 107   1      
 108   1          for (i = 0; i < UartReceivedBytes; i++) {
 109   2              UartBuffPoint = GPRSRecvSize - UartReceivedBytes + i + 1;
 110   2              if (UartBuffPoint < 2)  continue;
 111   2                  if (!GPRSDBusFlag) {
 112   3                       if (GPRSRecvBuff[UartBuffPoint - 1] == 0x55 &&
 113   3                              GPRSRecvBuff[UartBuffPoint - 2] == 0xaa) {
 114   4                              GPRSDBusFlag = TRUE;
 115   4                              GPRSDBusPos1 = UartBuffPoint - 2;
 116   4                      }
 117   3                  }   
C51 COMPILER V7.20   UART                                                                  11/13/2004 14:51:06 PAGE 3   

 118   2                  else{
 119   3                      if (UartBuffPoint > GPRSDBusPos1+3) DataLength = GPRSRecvBuff[GPRSDBusPos1+3];
 120   3                      if(UartBuffPoint >= GPRSDBusPos1+DataLength+5+1){
 121   4                              GPRSDBusFlag = FALSE;
 122   4                              GPRSDBusPos2 = UartBuffPoint - 1;
 123   4                              GPRSRecvSize -= UartBuffPoint;
 124   4                              XorSum = 0;
 125   4                              for (j = 0; j < DataLength + 5; j++) {
 126   5                                      XorSum ^= GPRSRecvBuff[GPRSDBusPos1+j];
 127   5                              }
 128   4                              if (XorSum != GPRSRecvBuff[GPRSDBusPos1+DataLength + 5])        return FALSE;           
 129   4                              memcpy(GPRSSaveBuff, GPRSRecvBuff + GPRSDBusPos1,GPRSDBusPos2 - GPRSDBusPos1 + 1);
 130   4                              return TRUE;
 131   4                      }
 132   3                  }
 133   2          }
 134   1          return FALSE;
 135   1      }
 136          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    659    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   4246       6
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     15      10
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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