c语言串口通信范例文档格式.docx

1、intvectnum=IntVectNum;CharsInBuf=0;CircIn=0;CircOut=0;f=（Baud/100）;f=1152/f; High=f/256;Low=f-High*256;outp（ComPortAddr+3,0x80）;outp（ComPortAddr,Low）;outp（ComPortAddr+1,High）;Data=（Data-5）|（Stop-1）*4）;if（Parity=2） Data=Data|0x18;else if（Parity=1） Data=Data|0x8;outp（ComPortAddr+3,Data）;outp（ComPortAd

2、dr+4,0x0a）;outp（ComPortAddr+1,0x01）;disable（）;OldAsyncInt=getvect（ IntVectNum ）;setvect（ IntVectNum, AsyncInt ）;enable（）;maskb=inp（Port8259+1）;if（IntVectNum=0x0c）outp（Port8259+1,maskb&0xef）;else outp（Port8259+1,maskb&0xf7）;static void interrupt far AsyncInt（void）if（CharsInBufMaxBufLen） BufferCircIn=

3、inp（comportaddr）;if（CircIn0） （*Char）=BufferCircOut; if（CircOutMaxBufLen-1）CircOut+; else CircOut=0; CharsInBuf-; Flag=0; return Flag;int SendChar（unsigned char Char）if（inp（comportaddr+5）&0x20）=0） return -1;outp（comportaddr,Char）;return 0;main（）int i,c;unsigned char InChar;Init_COM（COM232,COMINT,1200

4、,8,1,0）;while（1） if（kbhit（） if（InChar=getch（）=27）break; else while（SendChar（InChar）; if（GetCharInBuf（&InChar）=0） printf（%c,InChar）;Restore（）;接收程序：#include stdlib.hmath.h#define RXD 0 /接收#define TXD 0 /发送#define LSB 0 /波特率调节低8位#define MSB 1 /波特率调节高8位#define IER 1 / 中断起用寄存器#define IIR 2 /中断标识寄存器#defin

5、e LCR 3 /线路控制寄存器#define MCR 4 /调制解调器控制寄存器#define LSR 5 /线路状态寄存器#define MSR 6 /调制解调器状态寄存器#define IERV 1#define OUT2 0x08#define ERTS 2#define EDTR 1#define EMPTY 0X20#define READY 0X30#define ICREG 0X20#define IMASKREG 0X21#define EOI 0X20#define WAITCOUNT 5000#define BUFFLEN 2048 /用于存储字符的数组的界#define

6、 ALTE 0X12#define ALTQ 0X10#define SER_BAUD_1200 96#define SER_BAUD_2400 48#define SER_BAUD_9600 0x0C#define SER_BAUD_19200 6#define SER_STOP_1 0 /*/ 1 stop bit per character*/#define SER_STOP_2 4 /*/ 2 stop bits per character*/#define SER_BITS_5 0 /*/ send 5 bit characters*/#define SER_BITS_6 1 /*/

7、 send 6 bit characters*/#define SER_BITS_7 2 /*/ send 7 bit characters*/#define SER_BITS_8 3 /*/ send 8 bit characters*/#define SER_PARITY_NONE 0 /*/ no parity*/#define SER_PARITY_ODD 8 /*/ odd parity*/#define SER_PARITY_EVEN 24 /*/ even parity*/int port;int ComNum;unsigned portaddr;unsigned portf;u

8、nsigned int baudtable=0x180,0xc0,0x60,0x30,0x18,0x0c,0x06;unsigned char paritytable=0x08,0x18,0x00,0x28,0x38;unsigned char bufferBUFFLEN;/recv bufint buffin=0;int buffout=0;int incount=0;int outcount=0;void interrupt（*vect_）（.）;void putb（unsigned char ch）/write a char to the recvbuf 将中断得到的数据写到缓冲区int

9、 temp;temp=buffin;if（+buffin=BUFFLEN） buffin=0;if（buffin!=buffout） bufferbuffin=ch; / printf（bufferin%d=%c,bufferbuffin）; / getch（）; else buffin=temp;unsigned char getb（）/read a char from the recvbufif（buffout!=buffin） if（+buffout=BUFFLEN） buffout=0; /printf（bufferout%d=%c,buffout,bufferbuffout）; re

10、turn（bufferbuffout）; return（0xff）;/*unsigned char sender（ unsigned char ch）outportb（portaddr2+TXD,ch）;printf（nsender outportdata=%cn,ch）;outcount+;return（1）;*/void interrupt receiver（.）unsigned char ch;ch=inportb（portaddr+RXD）;putb（ch）;incount+; /记录接收了多少个数据。outportb（ICREG,EOI）;void SerInit（int baud,

11、int configuration）disable（）;outportb（portaddr+LCR,0x80）;outportb（portaddr+LSB,baud）;outportb（portaddr+MSB,0x00）;outportb（portaddr+LCR,configuration）;enable（）;void SerOpen（void）vect_=getvect（portf+8）;inportb（portaddr+RXD）;inportb（portaddr+MSR）;inportb（portaddr+LSR）;inportb（portaddr+IIR）;outportb（port

12、addr+IER,IERV）;outportb（portaddr+MCR,OUT2|ERTS|EDTR）;outportb（IMASKREG,inportb（IMASKREG）&（1portf）;setvect（portf+8,receiver）;void SerClose（void）outportb（portaddr+IER,0）;outportb（portaddr+MCR,0）;outportb（IMASKREG,inportb（IMASKREG）|（1ComNum;the current set is:9600,even, data bits 8, stop 1,Int（）;nnOVER

13、nexit（0）;发送文件程序bios.hgraphics.h#ifdef _cplusplus #define _CPPARGS .#else #define _CPPARGS#endif#define SER_RBF 0#define SER_THR 0#define SER_IER 1#define SER_IIR 2#define SER_LCR 3#define SER_MCR 4#define SER_LSR 5#define SER_MSR 6#define SER_DLL 0#define SER_DLH 1#define SER_BAUD_9600 12#define SER

14、_GP02 8#define COM_1 0x3F8#define COM_2 0x2F8 /*/ base port address of port 1*/#define COM_3 0x3E8#define COM_4 0x2E8#define SER_DIV_LATCH_ON 128 /*/ used to turn reg 0,1 into divisor latch*/#define PIC_IMR 0x21 /*/ pics interrupt mask reg.*/#define PIC_ICR 0x20 /*/ pics interupt control reg.*/#defi

15、ne INT_SER_PORT_0 0x0C /*/ port 0 interrupt 1 & 3*/#define INT_SER_PORT_1 0x0B /*/ port 0 interrupt 2 & 4*/#define SERIAL_BUFF_SIZE 128 /*/ current size of circulating receive buffer*/void interrupt far （*Old_Isr）（_CPPARGS）; /*/ holds old port interrupt handler*/char ser_bufferSERIAL_BUFF_SIZE; /*/

16、the receive buffer*/int ser_end = -1,ser_start=-1; /*/ indexes into receive buffer*/int ser_ch, char_ready=0; /*/ current character and ready flag*/int old_int_mask; /*/ the old interrupt mask on the PIC*/int open_port; /*/ the currently open port*/int serial_lock = 0; /*/ serial ISR semaphore so th

17、e buffer*/ /*/ isnt altered will it is being written*/ /*/ to by the ISR*/*-写串口-*/void interrupt far Serial_Isr（_CPPARGS）serial_lock = 1;ser_ch = inp（open_port + SER_RBF）;if （+ser_end SERIAL_BUFF_SIZE-1） ser_end = 0;ser_bufferser_end = ser_ch;+char_ready;outp（PIC_ICR,0x20）;serial_lock = 0;int Ready_

18、Serial（）return（char_ready）;/*-读串口-*/int Serial_Read（）int ch;while（serial_lock）if （ser_end != ser_start） if （+ser_start ser_start = 0; ch = ser_bufferser_start;%x if （char_ready 0） -char_ready; return（ch）; return（0）;/*-写串口-*/Serial_Write（char ch）while（!（inp（open_port + SER_LSR） & 0x20）asm clioutp（open_port