[嵌入式]两台pc机间的零modem连接的代码

如何实现两台pc机间的零modem链接，对串口和编码毫无头绪的我去找代码发现能用的没几个，绝望之下看到

https://blog.csdn.net/jc83278/article/details/78951313?spm=1001.2014.3001.5506
这篇博文，很感谢博主虽然也经历一番波折最终还是实现了收发。
如果你想有进步就看上面这篇按他的步骤先建立个虚拟的串口（听其他码友说如果直接进行两台pc机间的收发不调好波特率和比特率会烧坏串口，怕怕的就先建个模拟的吧），然后再琢磨他的代码，看如何改进，你如果想完成个任务就看我下面这个代码。

接收方：

#include<windows.h>
#include<stdio.h>
#include<stdint.h>
#include<iostream>
using namespace std;
typedef struct {
 HANDLE hCom;
 uint32_t baudrate;
 uint32_t bytesize;
 char parity;
 uint32_t stopbit;
} rs232_device;

int set_opt(HANDLE hFile, int nSpeed, int nBits, char nEvent, int nStop)
{
 DCB dcb;
 COMMTIMEOUTS timeouts;
//set input buf and output buf
 SetupComm(hFile, 512, 512);
//set read timeout
 timeouts.ReadIntervalTimeout = 1000;
 timeouts.ReadTotalTimeoutMultiplier = 500;
 timeouts.ReadTotalTimeoutConstant = 5000;
//set write timeout
 timeouts.WriteTotalTimeoutMultiplier = 0;
 timeouts.WriteTotalTimeoutConstant = 2000;
 SetCommTimeouts(hFile, &timeouts);
//store current setting
    if (0 == GetCommState(hFile, &dcb)){
        return -1;
    }
//set BaudRate
 switch(nSpeed){
  case 2400:
   dcb.BaudRate = CBR_2400;
   break;
  case 4800:
   dcb.BaudRate = CBR_4800;
   break;
  case 115200:
   dcb.BaudRate = CBR_115200;
   break;
  default:
   dcb.BaudRate = CBR_9600;
   break;
 }
//set ByteSize
 switch(nBits){
  case 7:
   dcb.ByteSize = 7;
   break;
  case 8:
   dcb.ByteSize = 8;
   break;
  default:
   dcb.ByteSize = 8;
   break;
 }
//set Parity
 switch(nEvent){
  case 'N':
   dcb.Parity = NOPARITY;
   break;
  case 'O':
   dcb.Parity = ODDPARITY;
   break;
  case 'E':
   dcb.Parity = EVENPARITY;
   break;
 }
//set StopBit
 switch(nStop){
  case 1:
   dcb.StopBits = ONESTOPBIT;
   break;
  case 2:
   dcb.StopBits = TWOSTOPBITS;
   break;
 }
 if(0 == SetCommState(hFile, &dcb)){
  return -1;
 }
    return 0;
}



int main()
{
	rs232_device rs232_dev;
 	rs232_dev.baudrate = 119200;
 	rs232_dev.bytesize = 8;
 	rs232_dev.parity = 'N'; 
 	rs232_dev.stopbit = 1;
 	//打开串口3
 	rs232_dev.hCom = CreateFile("COM3",GENERIC_READ |GENERIC_WRITE, 0,NULL,OPEN_EXISTING,0,NULL);
 	if (rs232_dev.hCom !=INVALID_HANDLE_VALUE)
	 	{
  			printf("Open COM3 OK!\n");
 		}else 
  		printf("Open COM3 Fail!\n");
 	//通讯设置
 	if(-1 == set_opt(rs232_dev.hCom,
     	rs232_dev.baudrate,
     	rs232_dev.bytesize,
     	rs232_dev.parity,
     	rs232_dev.stopbit))
 		{
  			if(INVALID_HANDLE_VALUE != rs232_dev.hCom)
   				CloseHandle(rs232_dev.hCom); 
 		}
 	unsigned char readBuf[1024];
 	char writeBuf[1024];
	
 	int count = 100;
 	DWORD readsize = 0;
 	DWORD writesize = 0;

 	int i;
 	while(1){
  		if(INVALID_HANDLE_VALUE != rs232_dev.hCom)
		{
   			printf("Start Read!\n"); 
   			
   ReadFile(rs232_dev.hCom, readBuf, count, &readsize, NULL);
   printf("Read Buf=");
//   printf("%d\n", readsize);
   for(i=0;i<readsize;i++)
   {
   	
   	printf("%c", readBuf[i]);//读发送方发的 
   }
    
   printf("\n");
  }
// WriteFile(rs232_dev.hCom, writeBuf, count, &writesize, NULL);//发给他 
 }
return 0;
}
 

本人也较懒，发送方的代码也就不打了，传个图片
就是把main里的改一下就可，想怎么收发随你，提示最好使用c++中的cin和cout，我也不清楚scanf到底比他差在哪，哪天有时间学学。下面是发送方：