一個c語言地串口通信程序范例

1、WORD格式#1ncludestdio h> #includedos h> #includeconio h> #includestring h>#defineC0M2320x2f8 ttdefineCOMINTOxOb#def ineMaxBufLen500 #def inePort82590x20 #def ineEofInt0x20 staticintcomportaddr;staticcharintvectnum： staticunsignedcharmaskb： staticunsignedcharBufferMaxBufLen;staticintCharsIn

2、Buf, Circin, CircOut;staticvoid(interruptfar*01dAsyncInt) 0;staticvoidinterruptfarAsyncInt(void);voidInit_COM(intConiPortAddr, unsignedcharIntVectNum, intBaud,unsignedcharData, unsignedcharStop, unsignedcharParity)unsignedcharHigh, Low：intf;comportaddr=ComPortAddr;intvectnum=IntVectNum;CharsInBuf=O;

3、CircIn=0;Circ0ut=0;f二(Baud/100);f二1152/f;High二f/256;Low二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;elseif (Parity=l)Data=Data 0x8： outp(ComPortAddr+3, Data);outp(ComPortAddr+4, OxOa);outp(ComPortAddr+1

4、, 0x01);disable 0;01dAsyncInt=getvect(IntVectNum);setvect(IntVectNum, Asyncint);enable 0;maskb=inp (Port8259+1);辻(IntVectNumOxOc) outp (Port8259+1, maskb&Oxef): elseoutp(Port8259+l, maskb&Oxf?);staticvoidinterruptfarAsyncInt(void) disable 0;if (CharsInBuf<MaxBufLen)BufferCircin=inp(compor

5、taddr);if (CircIn<MaxBufLen-l)CircIn+： elseCircIn=O;if (CircIn=CircOut) CircOut+;elseCharsInBuf+;enable 0;outp(Port8259, Eofint);voidRestore(void) setvect(intvectnum, OldAsyncInt);outp(Port8259+1, maskb);intGetCharInBuf(unsignedchar*Char)專業(yè)資料整理WORD格式intFlag：Flag=-1;辻(CharsInBuf>0)(*Char)=Buffe

6、rCircOut;if (CircOut<MaxBufLen-l)CircOut+;elseCircOut=O;CharsInBuf;Flag=0;returnFlag;intSendChar(uns i gnedcharChar) if (inp (coniportaddr+5) & 0x20) =0) return-1;outp(comportaddr, Char);returnO： mainO inti, c： unsignedcharInChar;Init_C0M(C0M232, COMINT, 1200, & 1, 0);while(l)if (kbhit 0)if(InChar=getch()=27)bre