Lpc2000

Hi Eric,

  Yes on many occasions. What you are using is based on C procedure
calls which use the NULL (0x00) character as a string delimiter. So it
can not be saved or collected as a data value.

regards,
Charles

--- In lpc2000@yahoogroups.com, Eric Rullens <gorilla@d...> wrote:
> > You are using the generic controls for Win32. You are going to need to
> > change the DCE control for windows and write your own drivers. Windows
> 
> ??? generic controls, own drivers ???
> 
> > assumes that the serial RXD and TXD will be in ASCII and not in
> > binary. To get binary you have to change the ASCII setting to a BINARY
> > setting in teh DCE and then create a RAW rxd and txd routine to allow
> 
> ??? DCE RAW rxd txd routine ???
> 
> > you to get the characters. You can probably use an ActiveX control to
> > help you do this so you do not have to reinvent the wheel. If you need
> > some ideas I can email you a link of some source code that was written
> > for a serial DLL that we give away to customers.
> 
> Have you ever programmed Win32? The code below is essentially correct,
> CreateFile() and ReadFile() are perfectly usable. The only thing
missing is
> setting up the port itself. Use SetCommState() for that.
> 
> For more reference information see:
>
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/
> communications_functions.asp
> 
>  Eric
> 
> > --- In lpc2000@...m, "soren_t_hansen" <soren_t_hansen@y...>
> > wrote:
> > > I use a Win32 comport to receive with. It has the following setup:
> > > 
> > > HANDLE m_hCom = 0;
> > > m_hCom = CreateFile(m_sComPort,   // pointer to name of the file
> > >                     GENERIC_READ | GENERIC_WRITE,   
> > >                     0,	            
> > >                     NULL,	            
> > >                     OPEN_EXISTING,	    
> > >                     FILE_FLAG_NO_BUFFERING,
> > >                     NULL); 
> > > 
> > > I then read the comport with the following call:
> > > 
> > > ReadFile(m_hCom, buffer, length, &iBytesRead, NULL);
> > > 
> > > How can I prevent the PC from stripping the 0s?
> > > 
> > > Søren
> > > 
> > > --- In lpc2000@yahoogroups.com, Peter Jakacki <peterjak@t...> wrote:
> > > > Oh, you can transmit a 0 ok, it's just that the PC may strip NULs
> > (0's) 
> > > > from the input stream. It just comes back down to what software
> > you are 
> > > > using to receive. But since I don't know what you are 
> > using I can't
> > > help. :)
> > > > 
> > > > BTW, try transmiting 0's from the PC back to the PC to 
> > test that end. 
> > > > Elimination is the 1st part of debugging.
> > > > 
> > > > *Peter*
> > > > 
> > > > soren_t_hansen wrote:
> > > > 
> > > > >Hi everybody
> > > > >
> > > > >I want to transmit a number og bytes on UART1 and some 
> > of them are 0.
> > > > >When I receive the bytes on the PC, all the 0s are gone, 
> > resulting in
> > > > >an error on that side. 
> > > > >
> > > > >I use the following to transmit the bytes:
> > > > >
> > > > >while (!(U1LSR & 0x20));
> > > > >   U1THR = buffer[i];
> > > > >
> > > > >Isn't possible to transmit a 0?
> > > > >
> > > > >Best Regards
> > > > >Søren
> > > > >
> > 
> > 
> > 
> > 
> >  
> > Yahoo! Groups Links
> > 
> > 
> > 
> >  
> > 
> >