• 16V554 的测试代码

    　　 //------------------------------------------------------------------------   

    1. #include   "AT16C554.H"   
    2. //--------------------------------------------------------------------------------------------------   
    3. code        Uint    PORTAddrTABLE[PortNumber]={STARTADDR_SERIAL1,   
    4.                                                STARTADDR_SERIAL2,   
    5.                                                STARTADDR_SERIAL3,   
    6.                                                STARTADDR_SERIAL4};          //串口端口地址映射表   
    7.    
    8.    
    9. xdata       TCommHandle     CommDevice[PortNumber];   
    10. sbit        reset_16c554 =  P1^4;                                           //ST16C554 复位控制线   
    11. //---------------------------------------------------------------------------------------------------   
    12. //  Define Private Faction   
    13. //-----------------------------------------------------------------------------------------------------   
    14.    
    15. bool ReadPortRecBuf(uchar Port,Uchar *Byte);   
    16. bool WritePortSendBuf(uchar Port,Uchar Byte);   
    17. void Port_open(Uchar PortID,Uint Baud);   
    18.    
    19. //-------------------------------------------------------------------------   
    20. //  Define Public Faction   
    21. //-------------------------------------------------------------------------   
    22.    
    23. bool Init_16c554(void);   
    24. void Port_open(Uchar PortID,Uint Baud);   
    25. //void Port_open(Uchar PortID,int Baud,Uchar DataBitNum,Uchar Parit,Uchar Stop);   
    26. void Port_close(Uchar PortID);   
    27. int  Port_Receive(Uchar PortID,void *Buffer,int Count);   
    28. int  Port_Send(Uchar PortID,void *Buffer,int Count);   
    29.    
    30.    
    31.    
    32. //---------------------------------------------------------------------------------------------   
    33. //  Public Faction Code   
    34. //---------------------------------------------------------------------------------------------   
    35.    
    36.    
    37.    
    38.    
    39. //---------------------------------------------------------------------------------------------   
    40. //  初始化ST16C554   
    41. //---------------------------------------------------------------------------------------------   
    42. bool Init_16c554(void)   
    43. {   
    44. uchar xdata *ptr;   
    45. uchar i=Init_16c554_Count;   
    46. bool Result=false;   
    47.    
    48. while(--i)                                                  // 复位10次不成功，则返回出错   
    49.     {   
    50.       _nop_();   
    51.       reset_16c554 = FREE_RESET;   
    52.       ms_delay(5);   
    53.       reset_16c554 = RESET;                                 // 复位16C554   
    54.       ms_delay(10);                                         // 延时1毫秒   
    55.       reset_16c554 = FREE_RESET;   
    56.       ms_delay(10);   
    57.       ptr = STARTADDR_SERIAL1+SPR;                          // 通道1临时寄存器   
    58.       *ptr = 0xaa;                                          // 写测试值到临时寄存器   
    59.       _nop_();   
    60.       _nop_();   
    61.       if(*ptr == 0xaa)    
    62.         {   
    63.            Result=true;   
    64.            break;   
    65.         };//end if   
    66.     };//end while   
    67. for(i=0;i<PortNumber;i++) CommDevice[i].RAMAddress_Map=PORTAddrTABLE[i];   
    68.    
    69. return Result;   
    70. }   
    71. //---------------------------------------------------------------------------------------------   
    72. //    打开串口       
    73. //---------------------------------------------------------------------------------------------   
    74. void Port_open(Uchar PortID,Uint Baud)   
    75. {   
    76. uchar xdata *ptr;   
    77.    
    78. ptr = CommDevice[PortID].RAMAddress_Map;                                                // 取端口的基地址   
    79. *(ptr+LCR) = LCR_DIV_EN;                                                                // 允许发送波特率   
    80. *(ptr+DLM) = (uchar)(Baud>>8);   
    81. *(ptr+DLL) = (uchar)Baud;                                                               // 设置默任波特率为19200   
    82. *(ptr+LCR) = LCR_WORD_LEN8|LCR_STOP_LEN1;                                               // 设置字长为8，1个停止位，无校验位   
    83. *(ptr+FCR) = FIFO_EN|FIFO_TRI_LEVEL_1|FIFO_CLEAR_RCVR|FIFO_CLEAR_XMIT|FIFO_DMA_MODE;    // 设置FIFO 控制寄存器   
    84. *(ptr+IER) = IER_TRANSMITHOLD_INT|IER_RECEIVEHOLD_INT;                                  // 设置中断屏蔽寄存器   
    85. *(ptr+MCR) = MCR_INTX_EN;                                                               // 允许中断引脚输出   
    86.    
    87. if(PortID==0)   EX0 = true;                         // 开外部中断0(通道1中断)   
    88. if(PortID==1)   EX1 = true;                         // 开外部中断1(通道2中断)   
    89. if(PortID==2)   EX2 = true;                         // 开外部中断2(通道3中断)   
    90. if(PortID==3)   EX3 = true;                         // 开外部中断3(通道4中断)   
    91.    
    92. CommDevice[PortID].CommReceive_Head=0;   
    93. CommDevice[PortID].CommReceive_Trail=0;   
    94. CommDevice[PortID].CommSend_Head=0;   
    95. CommDevice[PortID].CommSend_Trail=0;   
    96. CommDevice[PortID].Comm_Stu=SERIAL_STU_FREE;   
    97. }   
    98. //---------------------------------------------------------------------------------------------   
    99. //       关闭指定的端口   
    100. //---------------------------------------------------------------------------------------------   
    101. /*void Port_close(Uchar PortID)  
    102. {  
    103. uchar xdata *ptr;  
    104.   
    105. ptr = CommDevice[PortID].RAMAddress_Map;            // 取端口的基地址  
    106. *(ptr+LCR) = LCR_DIV_Dis;                           // 禁止发送波特率  
    107. *(ptr+MCR) = MCR_INTX_Dis;                          // 允许中断引脚输出  
    108.   
    109. CommDevice[PortID].CommReceive_Head=0;  
    110. CommDevice[PortID].CommReceive_Trail=0;  
    111. CommDevice[PortID].CommSend_Head=0;  
    112. CommDevice[PortID].CommSend_Trail=0;  
    113. CommDevice[PortID].Comm_Stu=SERIAL_STU_FREE;  
    114.   
    115. if(PortID==0)   EX0 = false;                        // 关外部中断0(通道1中断)  
    116. if(PortID==1)   EX1 = false;                        // 关外部中断1(通道2中断)  
    117. if(PortID==2)   EX2 = false;                        // 关外部中断2(通道3中断)  
    118. if(PortID==3)   EX3 = false;                        // 关外部中断3(通道4中断)  
    119. }*/   
    120. //--------------------------------------------------------------------------------------------------   
    121.   //功  能：从串口中接收数据   
    122.   //返回值：从串口中接收到的数据个数   
    123.   //参  数：   
    124.   //        Buffer：接收数的缓冲区   
    125.   //        Count： 想从串口缓冲区中接收数据个数   
    126. //--------------------------------------------------------------------------------------------------   
    127. /*int Port_Receive(uchar Port,register void *Buffer,int Count)  
    128. {  
    129. Uchar Size=0;  
    130.   
    131. if(Port>PortNumber-1)  return Size;  
    132.   
    133. while((Size<Count)&&(ReadPortRecBuf(Port,Buffer)))  
    134.      {  
    135.        Size++;  
    136.        Buffer=Buffer+1;  
    137.      };//end while   
    138. return Size;  
    139. }*/   
    140. //--------------------------------------------------------------------------------------------------   
    141.   //功  能：往串口发送数据   
    142.   //返回值：已发送的数据个数   
    143.   //参  数：   
    144.   //        Buffer：发送数据的缓冲区   
    145.   //        Count： 想从串口发送数据的个数   
    146. //--------------------------------------------------------------------------------------------------   
    147. int Port_Send(uchar Port,register void *Buffer,int Count)   
    148. {   
    149. uchar           i=0;   
    150. Uchar           Size=0;   
    151. uchar xdata     *ptr;   
    152.    
    153. if(Port>PortNumber-1)  return Size;   
    154.    
    155. ptr = CommDevice[Port].RAMAddress_Map;                                                                          // 取端口基地址   
    156.    
    157. while(Size<Count)   
    158.      {   
    159.         if(WritePortSendBuf(Port,*((Uchar *)Buffer)))   
    160.           {   
    161.             Size=Size+1;   
    162.             Buffer=Buffer+1;   
    163.           };//end if   
    164.         if(CommDevice[Port].Comm_Stu==SERIAL_STU_FREE)   
    165.           {   
    166.             for(i=0;(i<FIFO_SIZE)&&(CommDevice[Port].CommSend_Head!=CommDevice[Port].CommSend_Trail);i++)   
    167.                 {      
    168.                   CommDevice[Port].CommSend_Trail=(CommDevice[Port].CommSend_Trail+1)%CommMaxSendBuffer;   
    169.                   *(ptr+THR) = CommDevice[Port].CommSendBuffer[CommDevice[Port].CommSend_Trail];                // 发送数据   
    170.                 };//end for   
    171.             CommDevice[Port].Comm_Stu = SERIAL_STU_BUSY;   
    172.           };//end if   
    173.      };//end while   
    174. return Size;   
    175. }   
    176. //----------------------------------------------------------------------------------------------------   
    177.    
    178.    
    179.    
    180. //----------------------------------------------------------------------------------------------------   
    181. //私有函数   
    182. //----------------------------------------------------------------------------------------------------   
    183.   //功  能：从串口接收缓冲区中取得数据    
    184.   //返回值：   
    185.   //         true:   从缓冲区中成功取得数据   
    186.   //         false:  从缓冲区中无法取得数据   
    187.   //参  数： *Byte：从缓冲区中取得数据返回   
    188. //-----------------------------------------------------------------------------------------------------   
    189. /*bool ReadPortRecBuf(uchar Port,Uchar *Byte)  
    190. {  
    191. if(CommDevice[Port].CommReceive_Trail==CommDevice[Port].CommReceive_Head)  return false;  
    192.   
    193. *Byte=CommDevice[Port].CommReceiveBuffer[CommDevice[Port].CommReceive_Trail];  
    194. CommDevice[Port].CommReceive_Trail=(CommDevice[Port].CommReceive_Trail+1)%CommMaxReceiveBuffer;  
    195.   
    196. return true;  
    197. }*/   
    198. //-----------------------------------------------------------------------------------------------------   
    199.   //功  能：往串口发送缓冲区中写数据   
    200.   //返回值：   
    201.   //         true:   往缓冲区中写数据成功   
    202.   //         false:  从缓冲区中写数据失败   
    203.   //参  数： Byte：  往缓冲区中写入的数据   
    204. //------------------------------------------------------------------------------   
    205. bool WritePortSendBuf(uchar Port,Uchar Byte)   
    206. {   
    207. if((CommDevice[Port].CommSend_Head+1)%CommMaxSendBuffer==CommDevice[Port].CommSend_Trail) return false;   
    208.    
    209. CommDevice[Port].CommSend_Head=(CommDevice[Port].CommSend_Head+1)%CommMaxSendBuffer;   
    210. CommDevice[Port].CommSendBuffer[CommDevice[Port].CommSend_Head]=Byte;   
    211.    
    212. return true;   
    213. }   
    214. //--------------------------------------------------------------------------------   
    215. // 外部扩展串行口1中断处理程序(外部中断0)   
    216. //--------------------------------------------------------------------------------   
    217. void serial1_int() interrupt 0   
    218. {   
    219.     uchar xdata *ptr;   
    220.     uchar event;   
    221.     uchar port;   
    222.        
    223.     port =  CHANL1_PORT;   
    224.     ptr =   CommDevice[port].RAMAddress_Map;                                                // 读ISR 中断状态寄存器   
    225.     event = *(ptr+ISR)&0x0f;                                                                // 读最高优先级别的中断码   
    226.     _nop_();   
    227.        
    228.     switch(event)   
    229.           {   
    230.             case EVENT_RXRDY:                                                               // 接受数据到中断   
    231.             case EVENT_RXRDY_TIMEOUT:   
    232.                 for(;*(ptr+LSR)&EVENT_LSR_RECEIVE;)   
    233.                     {   
    234.                         CommDevice[port].CommReceiveBuffer[CommDevice[port].CommReceive_Head] = *(ptr+RHR);   
    235.                         if(((CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer)!=CommDevice[port].CommReceive_Trail)   
    236.                             CommDevice[port].CommReceive_Head=(CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer;   
    237.                     }; //end for   
    238.                 break;     
    239.             case EVENT_TXRDY:                                                               //发送数据中断   
    240.                 if(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head)         //判断数据包是否发送完毕   
    241.                     {   
    242.                         for(event=0;(event<FIFO_SIZE)&&(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head);event++)   
    243.                             {      
    244.                                 CommDevice[port].CommSend_Trail=(CommDevice[port].CommSend_Trail+1)%CommMaxSendBuffer;   
    245.                                 *(ptr+THR) = CommDevice[port].CommSendBuffer[CommDevice[port].CommSend_Trail];   
    246.                             };//end for   
    247.                           CommDevice[port].Comm_Stu = SERIAL_STU_BUSY;   
    248.                     }else CommDevice[port].Comm_Stu = SERIAL_STU_FREE;   
    249.                  break;   
    250.           };//end switch   
    251. }   
    252. //--------------------------------------------------------------------------------   
    253. // 外部扩展串行口2中断处理程序(外部中断2)   
    254. //--------------------------------------------------------------------------------   
    255. void serial2_int() interrupt 2   
    256. {   
    257.     uchar xdata *ptr;   
    258.     uchar event;   
    259.     uchar port;   
    260.        
    261.     port =  CHANL2_PORT;   
    262.     ptr =   CommDevice[port].RAMAddress_Map;                                                //读ISR 中断状态寄存器   
    263.     event = *(ptr+ISR)&0x0f;                                                                //读最高优先级别的中断码   
    264.     _nop_();   
    265.        
    266.     switch(event)   
    267.           {   
    268.             case EVENT_RXRDY:                                                               //接受数据到中断   
    269.             case EVENT_RXRDY_TIMEOUT:   
    270.                 for(;*(ptr+LSR)&EVENT_LSR_RECEIVE;)   
    271.                     {   
    272.                         CommDevice[port].CommReceiveBuffer[CommDevice[port].CommReceive_Head] = *(ptr+RHR);   
    273.                         if(((CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer)!=CommDevice[port].CommReceive_Trail)   
    274.                             CommDevice[port].CommReceive_Head=(CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer;   
    275.                     }; //end for   
    276.                 break;     
    277.             case EVENT_TXRDY:                                                               //发送数据中断   
    278.                 if(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head)         //判断数据包是否发送完毕   
    279.                     {   
    280.                         for(event=0;(event<FIFO_SIZE)&&(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head);event++)   
    281.                             {      
    282.                                 CommDevice[port].CommSend_Trail=(CommDevice[port].CommSend_Trail+1)%CommMaxSendBuffer;   
    283.                                 *(ptr+THR) = CommDevice[port].CommSendBuffer[CommDevice[port].CommSend_Trail];   
    284.                             };//end for   
    285.                         CommDevice[port].Comm_Stu = SERIAL_STU_BUSY;   
    286.                     }else CommDevice[port].Comm_Stu = SERIAL_STU_FREE;   
    287.                  break;   
    288.           };//end switch   
    289. }   
    290.    
    291. //--------------------------------------------------------------------------------   
    292. // 外部扩展串行口3中断处理程序(外部中断6)   
    293. //--------------------------------------------------------------------------------   
    294. void serial3_int () interrupt 6   
    295. {   
    296.     uchar xdata *ptr;   
    297.     uchar event;   
    298.     uchar port;   
    299.        
    300.     port =  CHANL3_PORT;   
    301.     ptr =   CommDevice[port].RAMAddress_Map;                                            // 读ISR 中断状态寄存器   
    302.     event = *(ptr+ISR)&0x0f;                                                            // 读最高优先级别的中断码   
    303.     _nop_();   
    304.        
    305.     switch(event)   
    306.           {   
    307.             case EVENT_RXRDY:                                                           // 接受数据到中断   
    308.             case EVENT_RXRDY_TIMEOUT:   
    309.                 for(;*(ptr+LSR)&EVENT_LSR_RECEIVE;)   
    310.                     {   
    311.                         CommDevice[port].CommReceiveBuffer[CommDevice[port].CommReceive_Head] = *(ptr+RHR);   
    312.                         if(((CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer)!=CommDevice[port].CommReceive_Trail)   
    313.                             CommDevice[port].CommReceive_Head=(CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer;   
    314.                     }; //end for   
    315.                 break;     
    316.             case EVENT_TXRDY:                                                           //发送数据中断   
    317.                 if(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head)     //判断数据包是否发送完毕   
    318.                     {   
    319.                         for(event=0;(event<FIFO_SIZE)&&(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head);event++)   
    320.                             {      
    321.                                 CommDevice[port].CommSend_Trail=(CommDevice[port].CommSend_Trail+1)%CommMaxSendBuffer;   
    322.                                 *(ptr+THR) = CommDevice[port].CommSendBuffer[CommDevice[port].CommSend_Trail];   
    323.                             };//end for   
    324.                         CommDevice[port].Comm_Stu = SERIAL_STU_BUSY;   
    325.                     }else CommDevice[port].Comm_Stu = SERIAL_STU_FREE;   
    326.                  break;   
    327.           };//end switch   
    328. }   
    329. //--------------------------------------------------------------------------------   
    330. // 外部扩展串行口4中断处理程序(外部中断7)   
    331. //--------------------------------------------------------------------------------   
    332. void serial4_int () interrupt 7   
    333. {   
    334.     uchar xdata *ptr;   
    335.     uchar event;   
    336.     uchar port;   
    337.        
    338.     port =  CHANL4_PORT;   
    339.     ptr =   CommDevice[port].RAMAddress_Map;                                            // 读ISR 中断状态寄存器   
    340.     event = *(ptr+ISR)&0x0f;                                                            // 读最高优先级别的中断码   
    341.     _nop_();   
    342.        
    343.     switch(event)   
    344.           {   
    345.             case EVENT_RXRDY:                                                               // 接受数据到中断   
    346.             case EVENT_RXRDY_TIMEOUT:   
    347.                 for(;*(ptr+LSR)&EVENT_LSR_RECEIVE;)   
    348.                     {   
    349.                         CommDevice[port].CommReceiveBuffer[CommDevice[port].CommReceive_Head] = *(ptr+RHR);   
    350.                         if(((CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer)!=CommDevice[port].CommReceive_Trail)   
    351.                             CommDevice[port].CommReceive_Head=(CommDevice[port].CommReceive_Head+1)%CommMaxReceiveBuffer;   
    352.                     }; //end for   
    353.                 break;   
    354.             case EVENT_TXRDY:                                                               //发送数据中断   
    355.                 if(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head)         //判断数据包是否发送完毕   
    356.                     {   
    357.                         for(event=0;(event<FIFO_SIZE)&&(CommDevice[port].CommSend_Trail!=CommDevice[port].CommSend_Head);event++)   
    358.                             {      
    359.                                 CommDevice[port].CommSend_Trail=(CommDevice[port].CommSend_Trail+1)%CommMaxSendBuffer;   
    360.                                 *(ptr+THR) = CommDevice[port].CommSendBuffer[CommDevice[port].CommSend_Trail];   
    361.                             };//end for   
    362.                         CommDevice[port].Comm_Stu = SERIAL_STU_BUSY;   
    363.                     }else CommDevice[port].Comm_Stu = SERIAL_STU_FREE;   
    364.                  break;   
    365.           };//end switch   
    366. }   
    367. //--------------------------------------------------------------------------------   
     
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  • 原文地址：https://www.cnblogs.com/zym0805/p/5089359.html
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