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From: Patrik Sj�gren <Patrik.Sjogren@lmemw.ericsson.se>
Subject: POSIX file_io, full-duplex problems
Date: 1996/03/29
Message-ID: <315B9B00.3B59@lmemw.ericsson.se>#1/1
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organization: Ericsson Microwave Systems AB Link�ping
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Date: 1996-03-29T00:00:00+00:00
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Hi,
I'm trying to make my application (running on Sun,Solaris2.5, compiled
with gnat3.01) talk to a PC via /dev/ttyb. The "hardware-binding" I've
tried to use is forest1.4 (POSIX). 
My problem is that I only get one-way communication to work (write_only
in one end and read_only at the other end). Should I be able to 
open( /dev/ttyb, Read_Write ) and use one filedescriptor for both read and
write? I've tried this and also two filedescriptors for read or write but the 
result is the same. The "write-end" gets garbage when trying to Read the
Read_Fd.
Could someone please give me a hint or direct me to existing software
using a similar setup?

	thanks!/Patrik Sjogren 
-- 
\_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_ \_
  Patrik Sj�gren
  Ericsson Microwave Systems AB
  Display- and Reconnaissance     Phone: (+46) 13 - 28 41 42
  Systems Division                Fax:   (+46) 13 - 28 42 80
  LM/EMW/FD/KL                    Email: Patrik.Sjogren@lmemw.ericsson.se
_/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/