AVR실습 윈도우 기반의 직렬통신(Write)

// RT.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <stdio.h>
#include <windows.h>

int main(void)
{
 char szPort[15]; //포트명을 저장할 변수
 wsprintf(szPort,"com%d", 2); // 2번포트로 통신

 //Comm device를 File Open과 같은 방법으로 연결
 HANDLE m_hComm = NULL; //통신 포트 핸들
 m_hComm = CreateFile( szPort,GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 if (m_hComm == INVALID_HANDLE_VALUE)
 {
  printf("(!) Failed to create a Comm Device file.");
  return FALSE;
 }

 DCB dcb;
 dcb.DCBlength = sizeof(DCB);

 GetCommState(m_hComm, &dcb); //DCB 초기갑

 dcb.BaudRate = 9600; //전송속도
 dcb.ByteSize = 8; //데이터비트 4~8
 dcb. Parity = 0; //Parity 0~4 = no, odd, even, mark, space
 dcb.StopBits = 0; //StopBits 0,1,2 = 1, 1.5, 2

 SetCommState(m_hComm, &dcb); //DCB변경
 
 OVERLAPPED osWrite;
 osWrite.Offset = 0;
 osWrite.OffsetHigh = 0;
 osWrite.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

 char buf[100];
 while(1)
 {
 
  WriteFile(m_hComm, buf, strlen(buf), NULL, &osWrite);
        printf("send1:%s",buf);

  Sleep(1000);
 }

 

 CloseHandle(m_hComm);
 return 0;
}