16C552初始化程序，收发程序，地址控制程序

#define PRINT_PE 0 #define PRINT_BUSY 1 #define PRINT_OK 2 #define 16C1552_BaseAddress 0x0000 //UART A REGISTER DEFINE #define UART2_RBR XBYTE[16C1552_BaseAddress+0x00] #define UART2_THR XBYTE[16C1552_BaseAddress+0x00] #define UART2_DLL XBYTE[16C1552_BaseAddress+0x00] #define UART2_DLM XBYTE[16C1552_BaseAddress+0x01] #define UART2_IER XBYTE[16C1552_BaseAddress+0x01] #define UART2_FCR XBYTE[16C1552_BaseAddress+0x02] #define UART2_IIR XBYTE[16C1552_BaseAddress+0x02] #define UART2_LCR XBYTE[16C1552_BaseAddress+0x03] #define UART2_MCR XBYTE[16C1552_BaseAddress+0x04] #define UART2_LSR XBYTE[16C1552_BaseAddress+0x05] #define UART2_MSR XBYTE[16C1552_BaseAddress+0x06] #define UART2_SCR XBYTE[16C1552_BaseAddress+0x07] //UART B REGISTER DEFINE #define UART3_RBR XBYTE[16C1552_BaseAddress+0x00] #define UART3_THR XBYTE[16C1552_BaseAddress+0x00] #define UART3_DLL XBYTE[16C1552_BaseAddress+0x00] #define UART3_DLM XBYTE[16C1552_BaseAddress+0x01] #define UART3_IER XBYTE[16C1552_BaseAddress+0x01] #define UART3_FCR XBYTE[16C1552_BaseAddress+0x02] #define UART3_IIR XBYTE[16C1552_BaseAddress+0x02] #define UART3_LCR XBYTE[16C1552_BaseAddress+0x03] #define UART3_MCR XBYTE[16C1552_BaseAddress+0x04] #define UART3_LSR XBYTE[16C1552_BaseAddress+0x05] #define UART3_MSR XBYTE[16C1552_BaseAddress+0x06] #define UART3_SCR XBYTE[16C1552_BaseAddress+0x07] #define PRT_DATA XBYTE[16C1552_BaseAddress+0x00] #define PRT_STS XBYTE[16C1552_BaseAddress+0x01] #define PRT_CON XBYTE[16C1552_BaseAddress+0x02] #define 16C552_FRE 8 //crystal frequency #define UART2_BAUT 9600 //uart 2 baut rate #define UART3_BAUT 9600 //uart3 baut rate #define DL_UART2 (unsigned int)(16C552_FRE*1000000/16/UART2_BAUT) //分频系数计算 #define DL_UART3 (unsigned int)(16C552_FRE*1000000/16/UART3_BAUT) #define Enable_Prt_Int() PRT_CON=0x1c; #define Disable_Prt_Int() PRT_CON=0x0c; /********************************************************************** * * 名称: Init_16C552 * 说明: * 功能: 初始化552串口和并口 * 调用: none * 输入: none * 返回值: none * ***********************************************************************/ void Init_16C552(void) { unsigned char temp; SELECT_UART2; //串口2设置 UART2_LCR = 0x80; // 使能波特率设置 UART2_DLL = DL_UART2%256; // 设置通讯波特率为1200 UART2_DLM = DL_UART2/256; UART2_LCR = 0x03; // 8 bit_data, 1 bit_stop, no parity UART2_FCR = 0x00; //禁止FIFO模式 UART2_IER = 0x01; // 使能接收中断01 UART2_MCR = 0x08; // 使能串口中断 temp=UART2_RBR; // clear the int flag of 16c552 //串口3设置 SELECT_UART3; UART3_LCR = 0x80; // 使能波特率设置 UART3_DLL = DL_UART3%256; // 设置通讯波特率为1200 UART3_DLM = DL_UART3/256; UART3_LCR = 0x03; // 8 bit_data, 1 bit_stop, no parity UART3_FCR = 0x00; //禁止FIFO模式 UART3_IER = 0x01; // 使能接收中断01 UART3_MCR = 0x08; // 使能串口中断 temp=UART3_RBR; // clear the int flag of 16c552 //并口设置 SELECT_PRT; PRT_CON=0x0c; //pull strobe signal high PRT_DATA=0xFF; SELECT_NULL; } /******************************************************************************** 此函数为向并口发送一个字节，发送之前检查PE信号，如果出 错则返回PRINT_PE(0)，检查BUSY状态,如果2s钟一直忙则超时推出， 返回PRINT_BUSY(1)，如果一切正常返回PRINT_OK(2) *********************************************************************************/ unsigned char WriteOneByteToPrt(unsigned char Data) { unsigned char Status; unsigned int Timer=0xffff; SELECT_PRINTER; Prt_Status=PRT_STS; if(Prt_Status&0x20) return PRINT_PE; //judge paper out while((!(Prt_Status&0x80))&&(Timer--)) //JUDGE BUSY,and quit after 1s busy { Prt_Status=PRT_STS; } if(Timer==0) return PRINT_BUSY; PRT_DATA=Data; PRT_CON=0x0d; // generate the strobe signal //maybe need some delay here PRT_CON=0x0c; SELECT_NULL; return PRINT_OK; } /******************************************************************************** 此函数为向并口发送一组数据，数据个数为Number,指针指向需要发送的地址 *********************************************************************************/ void WriteStringToPrt(unsigned char *Pointer,unsigned char Number) { unsigned char tmp; tmp=*Pointer; while(Number--) { if(WriteOneByteToPrt(tmp)!=PRINT_OK) break; Pointer++; tmp=*Pointer; } } /********************************************************************** * * 名称: UART2_SendByte * 说明: * 功能: 从串口2发送1个字节 * 调用: none * 输入: * 返回值: none * ***********************************************************************/ void UART2_SendByte(unsigned char Data) { unsigned int Timer=5000; SELECT_UART2; while(((UART2_LSR&0x20)==0)&&(Timer--)) //wait transmit can receive a new byte { ; } if(Timer==0) //add error process code here { ; } UART2_THR=Data; SELECT_NULL; } void UART3_SendByte(unsigned char Data) { unsigned int Timer=5000; SELECT_UART3; while(((UART3_LSR&0x20)==0)&&(Timer--)) //wait transmit can receive a new byte { ; } if(Timer==0) //add error process code here { ; } UART3_THR=Data; SELECT_NULL; } //串口2接收数据中断 void UART2(void) interrupt 2 { unsigned char temp; SELECT_UART2; temp=UART2_RBR; // read receive buffer //add your code here SELECT_NULL; } //串口3接收数据中断 void UART3(void) interrupt 6 { SELECT_UART3; temp=UART2_RBR; // read receive buffer //add your code here SELECT_NULL; } //并口数据申请中断 void PRT(void) interrupt 7 { }