Re: Serial thread continued

From:
Kahlua <edward.frederick@verizon.net>
Newsgroups:
microsoft.public.vc.mfc
Date:
Fri, 15 Aug 2008 16:13:52 -0700 (PDT)
Message-ID:
<df708f3d-935e-475b-98b5-47868af008c6@y21g2000hsf.googlegroups.com>
On Aug 15, 7:08 pm, Malachy Moses <malachy.mo...@gmail.com> wrote:

On Aug 15, 3:41 pm, Kahlua <edward.freder...@verizon.net> wrote:

On Aug 15, 6:34 pm, Kahlua <edward.freder...@verizon.net> wrote:

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

UINT SerialThread( LPVOID Param ) //Thread to monitor serial activity
{
  char ed[10]; //for testin=

g 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??


I forgot to mention that the byte received is allways 32h no matter
what chat is sent to it...- Hide quoted text -

- Show quoted text -


Are you certain that you are showing the actual code? The _itoa()
function expects an int as its first parameter, but you have given it
an unsigned char. I am surprised that this would compile.

Maybe you should try something like this instead, and then do your own
conversion to base 16

sprintf( ed, "%c", chread);- Hide quoted text -

- Show quoted text -


I have tried it with chread as both an int and unsigned char and both
give the same read byte.
So this has nothing to do with the problem.

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