Re: Serial thread continued

From:

"Alexander Grigoriev" <alegr@earthlink.net>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 15 Aug 2008 18:29:55 -0700

Message-ID:

<eRJTY#z$IHA.4512@TK2MSFTNGP04.phx.gbl>

1. You need to use overlapped I/O.
2. Make sure to check return codes from ReadFile.

"Kahlua" <edward.frederick@verizon.net> wrote in message
news:97e5b202-e3c9-4c59-ba4a-7e154620f68d@25g2000hsx.googlegroups.com...

Below is my Serial thread:
---------------------------------------------------------------------

UINT SerialThread( LPVOID Param ) //Thread to monitor serial activity
{
char ed[10]; //for testing only
unsigned char chread;
DWORD dwRead;
DWORD dwEventMask;

if(!SetCommMask(hCom, EV_RXCHAR))
   AfxMessageBox("Error setting ComMask");

if(WaitCommEvent(hCom, &dwEventMask, NULL)){
   ReadFile (hCom, &chread, 1, &dwRead, NULL);
   _itoa(chread, ed, 16); //for testing only
   AfxMessageBox(ed); //for testing only
}
return TRUE;
}

---------------------------------------------------------------------

hCom is the comport handle.
chread is the byte returned.

The following 2 lines are only there to see what char was returned.
They will NOT be in the final routine.....

   _itoa(chread, ed, 16);
   AfxMessageBox(ed);

The routine does respond and the messagebox shows the byte that came
in.
BUT, the byte is not what was sent!

Any ideas??