windows串口通讯（读和写，很方便！！）

太忙太忙了，正好有需要，把代码贴上来备用，也给大家参考参考，实现了windows串口通讯的读和写

字符类型转换喝了一壶（大概五分钟吧....）

#include 
#include 
#include
#include  


using namespace std;

HANDLE 初始化串口(char *szStr) {
	//const char temp[5]="COM4";
	
	WCHAR wszClassName[5];
	memset(wszClassName, 0, sizeof(wszClassName));
	MultiByteToWideChar(CP_ACP, 0, szStr, strlen(szStr) + 1, wszClassName,
		sizeof(wszClassName) / sizeof(wszClassName[0]));
	HANDLE hCom1 = CreateFile(wszClassName,//COM1口
		GENERIC_READ | GENERIC_WRITE, //允许读和写
		0, //独占方式
		NULL,
		OPEN_EXISTING, //打开而不是创建
		0, //同步方式
		NULL);

	//if (hCom1 == (HANDLE)-1)
	if (hCom1 == INVALID_HANDLE_VALUE)
	{
		printf("打开COM失败!\n");
		//return FALSE;
	}
	else
	{
		printf("COM打开成功！\n");
	}

	SetupComm(hCom1, 1024, 1024); //输入缓冲区和输出缓冲区的大小都是1024
	COMMTIMEOUTS TimeOuts;
	//设定读超时
	TimeOuts.ReadIntervalTimeout = 100;
	TimeOuts.ReadTotalTimeoutMultiplier = 5000;
	TimeOuts.ReadTotalTimeoutConstant = 5000;
	//设定写超时
	TimeOuts.WriteTotalTimeoutMultiplier = 500;
	TimeOuts.WriteTotalTimeoutConstant = 2000;
	SetCommTimeouts(hCom1, &TimeOuts); //设置超时
	DCB dcb;
	GetCommState(hCom1, &dcb);
	dcb.BaudRate = 9600; //波特率为9600
	dcb.ByteSize = 8; //每个字节有8位
	dcb.Parity = NOPARITY; //无奇偶校验位
	dcb.StopBits = ONESTOPBIT; //1个停止位
	SetCommState(hCom1, &dcb);
	return hCom1;
}


int main() {
	/*发送模块
	string result="233";
	WriteFile(hCom1, result.data(), result.size(), NULL, NULL);
	*/
	HANDLE hCom1 = 初始化串口("COM4");

	char 缓冲[1000];
	DWORD readsize;
	int n = 100;
	while(n--){
	ReadFile(hCom1, 缓冲, 13, &readsize, NULL);
	cout <<"重量为："<< 缓冲;
}
	system("pause");
}