Sponsored Content
Top Forums UNIX for Advanced & Expert Users read() from ttyS1 issue while write() is Ok Post 302542480 by Corona688 on Wednesday 27th of July 2011 05:17:30 PM
Old 07-27-2011
It's hard to say without having access to the hardware unfortunately. I don't suppose you have access to an oscilloscope or logic probe to check the tx pin with?

I wonder if it has anything to do with flow control.
 

10 More Discussions You Might Find Interesting

1. Programming

popening for read and write

How can 'popen()' be used for reading and writing to opening pipe? If i try 'popen("prog", "rw")' and then put and get chars - it does not work. What is wrong? (1 Reply)
Discussion started by: szzz
1 Replies

2. Shell Programming and Scripting

read and write from a file

I have tried to show the file name whose size is greater than 200 byte in current directory. Please help me. ls -l | tr -s " " " " | cut -f 5,9 -d " " >out.txt #set -a x `cat out.txt` i=0 `cat out.txt` | while do read x echo $x #re=200 j=0 if }" < "200" ] then echo $j j=`expr $j... (2 Replies)
Discussion started by: rinku
2 Replies

3. Shell Programming and Scripting

Find all files with group read OR group write OR user write permission

I need to find all the files that have group Read or Write permission or files that have user write permission. This is what I have so far: find . -exec ls -l {} \; | awk '/-...rw..w./ {print $1 " " $3 " " $4 " " $9}' It shows me all files where group read = true, group write = true... (5 Replies)
Discussion started by: shunter63
5 Replies

4. Programming

read/write files

Hi all, I have a problem with some read/write functions. I have a .bin file which contains a lot of structures as follows: struct alumno { char id; char apellido1; char apellido2; char nombre; float nota1p; float nota2p; float notamedia; char photofilename; }; What I have... (3 Replies)
Discussion started by: Attenea
3 Replies

5. IP Networking

read/write,write/write lock with smbclient fails

Hi, We have smb client running on two of the linux boxes and smb server on another linux system. During a backup operation which uses smb, read of a file was allowed while write to the same file was going on.Also simultaneous writes to the same file were allowed.Following are the settings in the... (1 Reply)
Discussion started by: swatidas11
1 Replies

6. IP Networking

write() / read() syntax

hi am newbie to unix and socket programing I am trying to figuring out syntax for read and write to send data from server to client and client can read it I have to send two integers write(newsockfd,buffer,"%d %d",x,y,0) writing from client where x and y are two integers.. ... (7 Replies)
Discussion started by: karthik1238
7 Replies

7. Programming

Need help about read() and write() on TCP/IP

HI I need to implement a client/server TCP application. the customer is the client and the bartender is the server. When the customer enter the Bar, client connects to the server Server should reply the client immediately. Other wise if the server is busy, it should send an update message... (10 Replies)
Discussion started by: lixiao1212
10 Replies

8. Emergency UNIX and Linux Support

Capturing console (/dev/ttyS1) logs

Hi, I have been trying to capture console logs from the init script. When the ramfs is mounted, i check if usb is connected , if conncted, i mount it and redirected the console logs like so: cat & /dev/ttyS1 >> /mnt/logs.txt I'm getting /bin/sh : /dev/ttyS1 :permission denied ... (8 Replies)
Discussion started by: xerox
8 Replies

9. Shell Programming and Scripting

File Read and Write

I have got a file in following format: AAAAAAA BBBBBBBB CCCCCCC DDDDDDD I am trying to read this file and out put it in following format: AAAAAAA,BBBBBBB,CCCCCCC,DDDDDD Preferred method is shell or Perl. Any help appreciated. (11 Replies)
Discussion started by: Araoki
11 Replies

10. Programming

FIFO write and read

Can someone help me to write this program in C in QNX? Using the FIFO queues write a simple communication system consisting of programs write and read. The program write the parameters given strings enclosed in single quotes. These strings are written to the FIFO file. Reads the program read... (1 Reply)
Discussion started by: ebasse2
1 Replies
TTYSRV(8)						      System Manager's Manual							 TTYSRV(8)

NAME
ttysrv - connect to a serial port and log output SYNOPSIS
ttysrv [-o option] [-s sock] [-l log] -t tty [-b baud] [-p parity] [-w wordsize] [-i pidfile] DESCRIPTION
ttysrv is the backend for rconsole. It connects to the serial port, handles the log file and waits for connections from rconsole to view what's happening on the serial console. OPTIONS
-t tty Specify which device to connect to. -s sock The name of the socket to listen for connections from rconsole on. -o option Specify any ttyios options to open the port with. Currently only nolocal is supported. -l log The logfile to write to. If not set then no log is kept. -b baud Set the baud rate to talk to the port at. Defaults to 9600. -p parity Set the parity for the serial port. Defaults to none. -w wordsize Set the word size for the serial port. Defaults to 8 bits. -i pidfile The file to write the pid of ttysrv to. If not specified no such file is written. SEE ALSO
rconsole(1), remote-tty(1). AUTHOR
rtty was written by Paul Vixie <vixie@isc.org>. This manual page was written by Jonathan McDowell <noodles@earth.li> for the Debian project (but may be used by others). May 23, 2006 TTYSRV(8)
All times are GMT -4. The time now is 09:37 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy