Eagain Error Serial
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Today's Posts Advanced Search Find the answer to your Linux question: Entire Site Articles Downloads Forums Linux Hosting Forum GNU Linux Zone Programming / Scripting resource temporarily unavailable serial port Serial eagain error If this is your first visit, be sure to check read "resource temporarily unavailable" out the FAQ by clicking the link above. You may have to register before you can post: click the
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displayed. ** Linuxforums now supports the Tapatalk app for your mobile device. Results 1 to 2 of 2 Thread: Serial eagain error Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Enjoy an ad free experience by logging in. Not a member yet? Register. 07-15-2008 #1 robinsonvpanicker View Profile errno 11 View Forum Posts Private Message View Articles Just Joined! Join Date Dec 2007 Location bangalore Posts 38 Serial eagain error When i try to write and read data like ABC through serial port to a hardware device, used to check whether transmission of traffic is done without loss, the reading fails and the reason given is eagain error: temporarily resource unavailable when it is being read only by me........can anybody suggest what is wrong? .... Reply With Quote 07-15-2008 #2 wje_lf View Profile View Forum Posts Private Message View Articles Linux Engineer Join Date Sep 2007 Location Mariposa Posts 1,192 When I do this at the command line: Code: man 2 read I get this explanation for the EAGAIN error: Code: ...... EAGAIN Non-blocking I/O has been selected using O_NONBLOCK and no data was immediately available for reading. If you're using nonblocking I/O, use select() to inform you when data is available (for reading) or there's room for output data (for writing). Hope this helps. -- Bill Old age and treachery will overcome youth and skill. Reply With Quote Quick Navigation Programming / Scripting Top Site Areas Settings Pri
Today's Posts Advanced Search Find the answer to your Linux question: Entire Site Articles Downloads Forums Linux Hosting Forum GNU Linux Zone Programming / Scripting I get EAGAIN Error If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. http://www.linuxforums.org/forum/programming-scripting/125997-serial-eagain-error.html ** If you are logged in, most ads will not be displayed. ** Linuxforums now supports the Tapatalk app for your mobile device. Results 1 to 4 of 4 Thread: I get EAGAIN Error Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Enjoy an http://www.linuxforums.org/forum/programming-scripting/162443-i-get-eagain-error.html ad free experience by logging in. Not a member yet? Register. 04-05-2010 #1 validator View Profile View Forum Posts Private Message View Articles Just Joined! Join Date Apr 2010 Posts 2 I get serial port EAGAIN Error I use serial port. I get serial EAGAIN error. I open serial port with below settings. do I have any error with settings. Thanks. static int fd=-1; bool openPort(int baudrate, const char * ThePort) { unsigned long BAUD; struct termios port_settings; fd = open(ThePort, O_RDWR | O_NOCTTY | O_NDELAY ); tcgetattr(fd, &port_settings); if (fd == -1) // if open is unsucessful { //perror("open_port: Unable to open /dev/ttyS0 - "); printf("open_port: Unable to open /dev/tty0. \n"); } else { fcntl(fd, F_SETFL, FNDELAY); printf("port is open.\n"); } switch (baudrate) { case 115200: BAUD = B115200; break; case 57600: BAUD = B57600; break; case 38400: BAUD = B38400; break; case 9600: BAUD = B9600; break; default: BAUD = B38400; break; } // structure to store the port settings in cfsetispeed(&port_settings, BAUD); // set baud rates cfsetospeed(&port_settings, BAUD); port_settings.c_cc[VMIN] = 1;
HCL Search Reviews Search ISOs Go to Page... LinuxQuestions.org > Forums > Non-*NIX Forums > Programming char by char read from serial port User Name Remember Me? Password Programming This forum is for all programming questions. The question does not have to be directly related to Linux and http://www.linuxquestions.org/questions/programming-9/char-by-char-read-from-serial-port-659806/ any language is fair game. Notices Welcome to LinuxQuestions.org, a friendly and active Linux Community. You are https://ubuntuforums.org/archive/index.php/t-1337242.html currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today! Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? resource temporarily Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and resource temporarily unavailable getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Search this Thread 08-01-2008, 01:55 PM #1 windell LQ Newbie Registered: Jun 2004 Posts: 12 Rep: char by char read from serial port Hi, I'm writing a program that reads bytes from the serial port and displays them on the screen. I am quite new to writing code to interface with a serial port. I heard that there are two modes that I can read from the serial port: one in which requires a carriage return to be able to store the string and the other in which each character is read separately not needing a carriage return. I would like to do the latter. My application is to connect my computer to an IMU that only spits out byte values that aren't delimited by carriage returns. I would like to store these bytes individually to do some processing. I've connected my Linux box to a windows
PMHello, I am currently working with a microcontroller that is connected to /dev/ttyUSB0. I can read from it in GtkTerm, bash script, python and every other thing available for reading serial ports. When I try in C, I get -1 on the read but can easily write to it.. What is wrong? Here is the bash script that works fine! #/bin/bash while true do read LINE < /dev/ttyUSB0 echo $LINE done Here is the C, I know I have a lot of includes(desperation): #include