Software :: Serial Printer Setup 7 Data Bits Rx 8 Data Bits Tx
Aug 8, 2010
About 7 years ago I setup a Redhat system with 8 serial terminals and 8 serial printers, this is still running but I need to get another system running so the original can be taken down for maintenance. The printers are ancient Newbury data dot matrix wide carriage with 7 data bits receive 8 data bits transmit Xon/Xoff flow control. Now I remember setting the transmit and receive data bits as above but after 7 years can't remember where.
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Feb 6, 2010
when i type ping"proxy address" in my command line i get
pinging with 64 bit data while in windows i used to get 32 bit data...
whats the difference between the two??
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Aug 14, 2010
I'd like to represent data in a graphic form and one example is a million bits of data represented as a square .gif of 1 million pixels.
I'm posting here rather than [Art & Imaging] as I'd like to dump 0s and 1s directly into gif|jpg|png or other format, rather than using an application. Even with an application I'm not sure of an efficient way to channel the data.
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Sep 15, 2009
Using netstat I can get a lot of network related information which is pretty useful at times. But when I use for example 'netstat -s' it gives me a lot of counts for bits transferred or data packets transferred etc. Now one thing I am not sure of is that for how long those counts will keep rolling and when will they get reset (when I restart the machine?, when I restart the network services? Or if there is some kinda threshold set on it?) How exactly netstat counts those things (I mean what is the source of those counts for netstat).
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Jun 19, 2010
when I reformat ubuntu, I use AptonCD to save packages and then restore them without downloading anything over again. what I want to know is: I have the 32 bits ubuntu installed and then I downloaded the 64 bits version. If i reformat to the 64 bits one, would the DVD saved aptoncd packages from the 32 bits work on the 64 bits installation?
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May 18, 2011
I am wondering if I can install a 32 bits guest Windows XP in VirtualBox in my 64 bits Ubuntu Natty host? I need a 32 bits Windows to run some programs.
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Jan 5, 2010
I'm quite new to linux and I recently (and courageously) upgraded the computer of my work from opensuse 11.0 32bits to opensuse 11.2 64bits.
Well, everything would be quite fine except that I still have some softwares 32 bits that have the 64 bits version available. I know that because, using YaST, I can see by the Installed software section that there are 'choices' of versions for some programs; these versions are 'i586' and 'x86_64', and many of them have the i586 version installed.
So, I wonder if there is some type of auto upgrade all programs which are i586 and have the matching x86_64 avaliable...
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Jan 5, 2010
Can I install Linux 32 bits on system 64 bits?
For example if I have cpu 64 bits, can I install ubuntu 32 bits?
If yes, all drivers will befor 32 bits, right?
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Jun 9, 2010
I just create a vm image with 2 CPUs to be used on a one CPU machine. it works great. Now, i am thinking about creating a 64 bits Redhat VM image to be run on my 32 bits machine. Is that possible?
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Jun 21, 2010
I notice this in all my machines (32bits and 64bits).
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Dec 16, 2010
I successfully added/shared a network printer in SUSE 11.3 32 bit, but when I try on the 64 Bit box it didn't work out very well.What ports need to be open ? Is it necessary to open port 631 in YAST->Firewall->Advance- >UDP and IPP ?(TCP 631 already open) What services need to be running? Here is the error log :
[16/Dec/2010:19:25:43 -0500] [cups-polld xxx.xxx.xxx.xxx:631] CUPS-Get-Printers failed: Forbidden
XXX is my server IP
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Mar 5, 2010
I have an application where I am sending data via serial port from PC1 (Java App) and reading that data in PC2 (C++ App). The problem that I am facing is that my PC2 (C++ App) is not able to read complete data sent by PC1 i.e. from my PC1 I am sending 190 bytes but PC2 is able to read close to 140 bytes though I am trying to read in a loop.Below is code snippet of my C++ AppOpen the connection to serial port
Code:
serialfd = open( serialPortName.c_str(), O_RDWR | O_NOCTTY | O_NDELAY);
if (serialfd == -1)
[code]...
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Jun 11, 2009
I am using read() in c++ to get data from a serial port. However, if no data is available on the serial port the function blocks until dta arrives.Example code:
//------------------------------------------------------------
char m_readBuffer[255] = {0};
char* p_curChar = m_readBuffer;
[code]...
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Jun 30, 2010
I want to know what's different between Fedora 32 bits and 64 bits.
Also, I want to know if I want to run 64 bits of Fedora, what do I need ?
just in case: My CPU is "Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz"
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Dec 21, 2010
I dont know if this is the right forum, But I try to find a solution, I want to intercept data from/to serial port without disrupting the software that manages the serial port, (I would like to save the data to a file or sent into a socket) I searched somes modules and programs (linspy, ttysniff, interceptty, maxty ...), A bit complicated (There are some diff. between kernel 2.4 and 2.6), So I'd like to change the serial port driver to intercept the "read" and "write " and do what I want with the data, I'd like to know what do you think about
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Oct 20, 2009
I am not a profession programmer. I have to write a C code which send some command to attach display using C program. Can any one please help me in this regard.
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Mar 10, 2010
I am trying to send text data from one PC to other using Serial cable. One of the PC is running linux and I am sending data from it using write(2) system call. The log size is approx 65K bytes but the write(2) system call returns some 4K bytes (i.e. this much amount of data is getting transferred). I tried breaking the data in chunks of 4K but write(2) returns -1.My question is that "Is there any buffer limit for writing data on serial port? or can I send data of any size?. Also do I need to continously read data from other PC as I write 4K chunk of data"Do I need to do any special configuration in termios structure for sending (huge) data?
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Apr 22, 2010
I have been trying out serial and parallel data communication on Fedora 13 Beta. I can easily see the list of serial ports through:
Code:
setserial -g /dev/ttyS[0-3]
And can also write some data through:
Code:
ll > /dev/ttyS0
But I am unable to see parallel ports
I can see something like:
Code:
/dev/parport0
But when I try out:
ll > /dev/parport0
It throws error.
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Aug 31, 2009
I have got a problem while reading from the serial port. I'm working on iMX-31 board and Eclipse IDE. Whenever I'm trying to read any data through the serial port, it's displaying I/O Possible and the application is being terminated. After reading I'm trying to write this data on a file. Here are the excerpts from the code:
# int main()
{
if (openport()<0)
[code]...
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Apr 11, 2009
I have connected a device to my linux system with a serial cable (rs232). The settings are: port /dev/ttyS0, baud rate=38400, data bits=8, stop bits=1, no parity, no hardware or software handshaking. I wrote a linux program that sends 1 byte to the device, but the device doesn't receive it. I know the serial ports are working because when I use the CuteCOM application to send data, the device DOES receive it, so obviously it is a problem with my code..
Code:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
[code].....
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Aug 25, 2010
i want to try with a small application in linu in that i want to read some data from controller using serial port and i wanna transfor that data to another meachin in the network for this i want serial port interfacing programming as well as socket programming.
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Dec 27, 2010
I am doing work on serial port. I want to send/receive data to/from Microcontrolar through serial port. But I don't know how to initialize, receive and send data to Serial port. i am new in fedora so i hav'nt any deep concept of fedora.can anyone send me C code , which communicate through serial port in fedora (or atleast help me). I am using Fedora 11.
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Apr 24, 2010
i have the following challenge: i have a Bluetooth GPS device that i have connected to my linux notebook. but now i also want to use the same device (or better, GPS data stream) for my Navigation device (HP Ipaq with TomTom). make an serial port bluetooth service (sending) that my Navigation device can connect to. copy the incoming bluetooth serial port data stream to the outgoing bluetooth serial port.
i have already installed GPSD so i have the TCP port where the GPS data is available for everything on my notebook. but now i also want it to send it out through bluetooth.
1. is there someone out there who already did this?
2. how to make an bluetooth serial port service on Fedora 12?
3. how to copy a data stream from 1 device to the next device?
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Jan 5, 2011
Minicom was running fine two days ago capturing data from a gage device via a serial cable. Yesterday, users of the data started complaining that they were not receiving any data.
The minicom status line reads offline. Is this part of the problem or is this normal (I never really noticed it before.) All settings on the gage device match the minicom settings.
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Oct 30, 2010
I am writing a C program which reads data over serial port. While reading data, if I send my data(which is a 13 byte structure) periodic with a period of 1 second for 10 times I read it without problem and I read the data 10 times as I sent and as I expectBut if I send data continuousuly(without any time interval between each sending) 10 times I can only read 1 of them(I can only read it once).
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Apr 8, 2011
If Fedora 14 is a 32 or 64 bit system?.
Next, I am going to build a new pc and have bought the following parts:-
1.Motherboard -Asus M4A88T-M
2CPU-AMD Athlon 11 x3 445 3.1
3.RAM-Kingston Hyperx 4GB
4.Hardrive- Samsung 1TB Spinpioint
If anyone has any tips about building a pc I would be most grateful.
I am a bit concerned that the cd supplied with the motherboard may not be compatible with the linux system, and therefore I shall have to go on the 'net' to download the drivers.
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Jul 13, 2015
I tried connecting my Debian laptop to a vintage Apple //e using a Super Serial Card on the Apple side and a USB to serial adapter on the laptop side. It kind of works -- I can send data over to the Apple using e.g. echo "foobar" > /dev/ttyUSB0 or via minicom --, but every 20 seconds (quite exactly!) some 4 random characters appear on the Apple's screen (mostly tildes, sometimes a pipe). This does *not* happen when booting the laptop into Debian rescue mode; so I guess it must be some (daemon?) process messing around with the usb serial device in regular intervals.
I tried to disable quite some services, but the problem remains.I don't have any clue how I might catch the evil-doer in the act -- virtually all serial monitors I've so far read about allow only monitoring the interaction of a known program/process with a serial port. But in this case I first have to actually find out which process is talking to the serial port in the first place.
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Jul 6, 2010
I am implementing a simple serial protocol where my ARM9 board, running Linux is communicating to a slave peripheral board. The Master sends a 12 byte data stream and the peripheral board returns status in a 23 byte response. The serial port is opened in raw mode. It works perfectly on 44 reads; however, on the 45 read the data returned from the read() is incorrect. I've framed what's being sent on an oscope and it is correct.The coincidence is that 23 x 44 = 1012. It's as though the receive buffer is 1K and when I go past the boundary I get bad data. The read following the bad one is good again.I've tried flushing the buffer before reading but get the same result.Here's the port initialization code:
Code:
int initport(int fd)
{
[code]...
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Oct 17, 2010
What do the 'none' bits mean?
[Code]...
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Dec 16, 2010
I have a laptop with 4 GB of RAM and I am planning to install Ubuntu 10.10.
What would you recommend? 64 or 32 bits? and why?
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