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

void PrintAPIError(const char *msg, DWORD err)
{
	if (msg)
		fprintf(stderr, "%s%d\n", msg, err);

	LPVOID lpMsgBuf;

	FormatMessage(
		FORMAT_MESSAGE_ALLOCATE_BUFFER |
		FORMAT_MESSAGE_FROM_SYSTEM |
		FORMAT_MESSAGE_IGNORE_INSERTS,
		NULL,
		GetLastError(),
		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
		(LPTSTR)&lpMsgBuf,
		0,
		NULL);

	fprintf(stderr, "Win API Last Error: %s", (char *)lpMsgBuf);
	LocalFree(lpMsgBuf);
}

int WriteComPort(char *Port, char *data, int BaudRate, int ByteSize,int Parity,int StopBits) 
{ 
DCB dcb; 
DWORD byteswritten; 
const char* DRV_PATH = "\\\\.\\";
char portName[32];
strcpy(portName, DRV_PATH);
strncat(portName, Port, 6);

 HANDLE hPort = CreateFile( 
	portName, 
	GENERIC_WRITE, 
	0, 
	NULL, 
	OPEN_EXISTING, 
	0, 
	NULL 
 ); 
 if (INVALID_HANDLE_VALUE == hPort) {
	PrintAPIError("Error on CreateFile()!!!\n", GetLastError());
	return 0; 
 }
 if (!GetCommState(hPort,&dcb)) {
	PrintAPIError("Error on GetCommState()!!!\n", GetLastError());
	return 0; 
 }
 dcb.BaudRate = BaudRate;   //9600 Baud   
 dcb.ByteSize = ByteSize;    //8 data bits   
 dcb.Parity = Parity;   //no parity   
 dcb.StopBits = StopBits;  //1 stop 
 if (!SetCommState(hPort,&dcb)) {
  fprintf(stderr,"Error on SetCommState()!!!\n");
  return 0; 
}
 int retVal = WriteFile(hPort,data,1,&byteswritten,NULL);  
 CloseHandle(hPort); 
 if(!retVal) {
  fprintf(stderr,"Error on WriteFile()!!!\n");
  return 0; 
}
return 1; 
} 

int main(int argc, char *argv[])
{
 char *port="COM17";
 char c=0;
    
 while(scanf("%c",&c)>0){
	fflush(stdin);
 	if(!WriteComPort(port,&c,CBR_9600, 8, NOPARITY, ONESTOPBIT))
		fprintf(stderr,"Error!");
 }
 return 0;
}