Re: <SNIP>You haven't set dcb.

On Wednesday, April 16, 2008 9:40 PM uvbaz wrote:

On 14 Apr., 17:01, "Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>
wrote:

Sorry, i forgot to paste them.

int main(int argc, char *argv[])
{
   DCB dcb;
   HANDLE hCom;
   BOOL fSuccess;
   char *pcCommPort = "COM1";

   hCom = CreateFile( pcCommPort,
                    GENERIC_READ | GENERIC_WRITE,
                    0, // must be opened with exclusive-access
                    NULL, // no security attributes
                    OPEN_EXISTING, // must use OPEN_EXISTING
                    0, // not overlapped I/O
                    NULL // hTemplate must be NULL for comm devices
                    );

   if (hCom == INVALID_HANDLE_VALUE)
   {
       // Handle the error.
       printf ("CreateFile failed with error %d.\n", GetLastError());
       return (1);
   }

   // Build on the current configuration, and skip setting the size
   // of the input and output buffers with SetupComm.

   fSuccess = GetCommState(hCom, &dcb);

   if (!fSuccess)
   {
      // Handle the error.
      printf ("GetCommState failed with error %d.\n", GetLastError());
      return (2);
   }

   // Fill in DCB: 57,600 bps, 8 data bits, no parity, and 1 stop bit.

   dcb.BaudRate = CBR_57600; // set the baud rate
   dcb.ByteSize = 8; // data size, xmit, and rcv
   dcb.Parity = NOPARITY; // no parity bit
   dcb.StopBits = ONESTOPBIT; // one stop bit

   fSuccess = SetCommState(hCom, &dcb);

   if (!fSuccess)
   {
      // Handle the error.
      printf ("SetCommState failed with error %d.\n", GetLastError());
      return (3);
   }

   printf ("Serial port %s successfully reconfigured.\n", pcCommPort);
   return (0);
}