c语言串口通信范例

一个c语言的串口通信程序范例

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c语言

串口通信

通信程序

it

最近接触一个项目，用HL-C1C激光位移传感器+易控组态软件完成生产线高度跳变检测，好久没有接触c c#，一些资料，找来做个记录，也许大家用的着

#include

#include

#include

#include

#define COM232? 0x2f8

#define COMINT 0x0b

#define MaxBufLen 500

#define Port8259 0x20

#define EofInt 0x20

static int comportaddr;

static char intvectnum;

static unsigned char maskb;

static unsigned char Buffer[MaxBufLen];

static int CharsInBuf,CircIn,CircOut;

static void (interrupt far *OldAsyncInt)();

static void interrupt far AsyncInt(void);

void Init_COM(int ComPortAddr, unsigned char IntVectNum, int Baud,

unsigned char Data, unsigned char Stop, unsigned char Parity) {

unsigned char High,Low;

int f;

comportaddr=ComPortAddr;

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(ComPortAddr+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)

{

disable();

if(CharsInBuf

Buffer[CircIn]=inp(comportaddr);

if(CircIn

else CircIn=0;

if(CircIn==CircOut) CircOut++;

else CharsInBuf++;

enable();

outp(Port8259,EofInt);

}

void Restore(void)

{

setvect(intvectnum,OldAsyncInt);

outp(Port8259+1,maskb);

}

int GetCharInBuf(unsigned char *Char)

{

int Flag;

Flag=-1;

if(CharsInBuf>0)

{

(*Char)=Buffer[CircOut];

if(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,1200,8,1,0);

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

#include

#include

#include

#include

#include

#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