求WINDOWS下C语言读写串口的程序

[haoxihuan]

如题，要求：
1.不要TC下面的C程序，要求能在visual studio 6.0下运行的C语言程序。(TC下程序我从网上找到过)
2.不要linux下的C程序

[linxren]

不都一样？

[job82824]

http://wenku.baidu.com/view/34cac318964bcf84b9d57b82.html

[haoxihuan]

[Quote=引用 1 楼 linxren 的回复:]
不都一样？
[/Quote]
不一样，TC下有些串口操作函数VC6.0不支持，就算include头文件也不能编译通过。

[haoxihuan]

[Quote=引用 1 楼 linxren 的回复:]
不都一样？
[/Quote]
不要C++的， 不要用微软的控件。

[李迟]

看来只有windows API适合楼主的要求了，可以看看龚建伟写的书，里面介绍几种方法：
1、使用第3方串口类；
2、控件；
3、API
百度一下“龚建伟”。

[haoxihuan]

[Quote=引用 5 楼 subfate 的回复:]
看来只有windows API适合楼主的要求了，可以看看龚建伟写的书，里面介绍几种方法：
1、使用第3方串口类；
2、控件；
3、API
百度一下“龚建伟”。
[/Quote]

龚建伟的书我看过。那本书唯一的一个C语言串口读写程序是运行在TC下的。其他的都是C++程序。我需要的是运行在visual studio的C程序。

[haoxihuan]

#include <stdio.h>
#include <dos.h>
#include <conio.h>
#include <io.h>
#include <sys\stat.h>

#define LENGTH 1024

void InitCOM();		//initialize serial port
void OpenPort();	//open serial port
void ClosePort();	//close serial port,release resource

void interrupt far  asyncint();	//new ISR
void interrupt(*asyncoldvect)();//interrupt vector: to reserve interrupt scene

unsigned char Buffer[LENGTH];

int buffin=0;
int buffout=0;

unsigned char rbuf[RWMAXBUFLEN] = {0};

void OpenPort()	//open COM1
{
	unsigned char ucTemp;
	InitCOM();  //initialize serial port

	asyncoldvect=getvect(0x0c);	//COM1 produce hardware interrupt IQR4,corresponding interrupt vector 0CH
	disable();       //close interrupt
	inportb(0x3f8);
	inportb(0x3fe);
	inportb(0x3fb);
	inportb(0x3fa);
	outportb(0x3fc,0x08|0x0b);
	outportb(0x3f9,0x01);
	ucTemp=inportb(0x21)&0xef;	//open IRQ1
	outportb(0x21,ucTemp);
	setvect(0x0c,asyncint);
	enable();       //open interrupt
}

void interrupt far asyncint()	//ISR,receiving data from COM1
{
	//unsigned char ch;
	Buffer[buffin++] = inportb(0x3f8);	//put chars to buffer
	if (buffin>= LENGTH)
		buffin=0;		//pointer reset
	outportb(0x20,0x20);		//send EOI to ICR
}

void ClosePort(void)	//close COM1
{
	disable();
	outportb(0x3f9,0x00);	//close interrupt
	outportb(0x3fc,0x00);
	outportb(0x21,inportb(0x21) & 0x10);
	enable();
	setvect(0x0c,asyncoldvect);
}

void InitCOM()	//initialize serial port
{

	outportb(0x3fb,0x80);  //DLAB=1,which means to set baud rate
	outportb(0x3f8,0x0C);  //set baud rate as 9600bps
	outportb(0x3f9,0x00);

	outportb(0x3fb,0x03);  //set 8 databits,1 stopbit and no parity
	outportb(0x3fc,0x08|0x0b);
	outportb(0x3f9,0x01);
}

unsigned char read_char(void)	//read received data from buffer
{
	unsigned unch;
	if(buffout != buffin)
	{
		unch = Buffer[buffout];
		buffout++;
		if(buffout >= LENGTH)
			buffout=0;	//pointer reset
		return(unch);
	}
	else
		return(0xff);
}

unsigned char* read_string(void)
{ 	
     if(buffout<=buffin)
     {
		unsigned char * temp =(unsigned char *) malloc(buffin-buffout+1);
		memcpy(temp, &Buffer[buffout],buffin-buffout+1);
		buffout= buffin;
		if(buffout>=LENGTH)
			buffout=0; 		//pointer reset
		return temp;
	}
	else if(buffout > buffin)
	{
		unsigned char *temp =(unsigned char *)malloc(LENGTH-buffout+buffin+2);
		memcpy(temp,&Buffer[buffout],LENGTH-buffout+1);
		strncat(temp,Buffer,buffin+1);
		buffout = buffin;
		if(buffout>=LENGTH)
			buffout=0; 		//pointer reset
		return temp;
	}
	else
		return (0xff);
}

void send_char(unsigned char unch)
{
   while ( ((inp( 0x3f8 + 5)) & 0x40 ) == 0); //get D6 and check it to avoid lost data to be sent
   outportb(0x3f8 , unch);
}
/*
void send_string(int nStrlen,char *ChBuf)
{
	int k=0;
	do {
		send_char(*(ChBuf + k));
		k++;
	} while ((k < nStrlen));
}
*/
void send_string(char * chBuf)
{
	char *temp = chBuf;
	do{
		 send_char(*temp++);
		}while(*temp!='\0');
}

void main()		//main func as follow
{
	unsigned char unChar;
	short bExit_Flag = 0;
	
	int i =0;
	OpenPort(); 	//open the serial port

	fprintf(stdout, "\n\nReady to Receive and Send DATA\n"
			"press [ESC] to quit...\n\n");
	do {

		if ( kbhit() )			//press any key and check it
		{
			unChar = getch();
			switch(unChar)
			{
			case 0x1B:			//the ASCII value of ESC is 27
				bExit_Flag = 1;	//Exit program
				break;
		     	default:
				break;
			}
			
	
			if(!bExit_Flag)
				send_char(unChar);  //send the char
	
		}
		
		unChar = read_char();		//get the received char,可添加接收处理函数部分
		if (unChar != 0xff)
		{
			fprintf(stdout,"%c",unChar);
		}
		
	} while ( !bExit_Flag );
	
	ClosePort();			//close serial port
}

[haoxihuan]

楼上的read_string和send_string都是我写的。目的是改变每循环一次 才接收一个字符的问题。