UART in HP iPaq 2210 ?

UART in HP iPaq 2210 ?

Post by SGFya » Thu, 13 Jan 2005 01:21:04


hi,
HP iPaq ppc having physical UART or virtual one? If physical UART, then
could you please tell me the buffer size?

regards,
hari
 
 
 

UART in HP iPaq 2210 ?

Post by Paul G. To » Thu, 13 Jan 2005 03:33:29

It would be better if you told us *what* you want to do, rather than asking
a number of strange questions that are obviously related to *how* you're
trying to do it...

Paul T.

 
 
 

UART in HP iPaq 2210 ?

Post by SGFya » Thu, 13 Jan 2005 22:39:03

In desktop pc, we have physical UART, i.e., 16550 16 byte buffer size. I am
asking about the existence of the same in ppc ( mainly for communication thru
COM port)

regards,
hari
 
 
 

UART in HP iPaq 2210 ?

Post by Dick Grie » Fri, 14 Jan 2005 02:21:06

Almost certainly it uses a 16550 type UART, thus it has a 16-byte receive
FIFO. This is not the size of the buffer that is used by the serial port
driver, however (and you or I have no control over the FIFO usage, as we do
on a desktop system).

The real question is why do you want to know? Perhaps there is an issue
that doesn't involve the FIFO?

Dick

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 4th
Edition ISBN 1-890422-28-2 (391 pages) published July 2004. See
www.mabry.com/vbpgser4 to order.
 
 
 

UART in HP iPaq 2210 ?

Post by Paul G. To » Fri, 14 Jan 2005 02:22:30

That's not documented, as far as I know. And it might be different from one
device to another. Our Windows CE devices happen to use 16550's, but that
was our choice, not a requirement for all Windows CE or Pocket PC devices.
Again, what's the *real* question? You can't possibly care about whether
it's a 16550 for no reason...

Paul T.