Difference between revisions of "Communicate with your board from a Linux Host (Basics)"

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m (→‎TFTP server installation)
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==RS232 Terminal configuration==
 
==RS232 Terminal configuration==
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We suggest you to use '''Kermit''' as Terminal emulator for RS232 connection. Minicom was sadly reported to have problems when communicating with U-Boot (ZModem data transfer).
+
You will need a RS232 terminal emulator to communicate with U-Boot. You can choose between:
 +
* [[Kermit]]
 +
* Minicom
 +
* GtkTerm
 +
We suggest you to use [[Kermit]] as Terminal emulator for RS232 connection. Minicom was sadly reported to have problems when communicating with U-Boot (ZModem data transfer).
 
If you just need a simple serial console and not to transfer data through RS232, then '''GTKTerm''' is the perfect choice ! (package gtkterm in Ubuntu)
 
If you just need a simple serial console and not to transfer data through RS232, then '''GTKTerm''' is the perfect choice ! (package gtkterm in Ubuntu)
−
 
−
===Kermit installation=== 
 
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* On *Ubuntu / Debian:
 
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# apt-get install ckermit
 
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or use Synaptic graphical package manager.
 
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* On Fedora:
 
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# rpm -q ckermit
 
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===Kermit configuration=== 
 
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* Edit/Create .kermrc file in your $HOME directory and put in it:
 
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set line /dev/ttyS0
 
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set speed 115200
 
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set carrier-watch off
 
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set handshake none
 
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set flow-control none
 
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robust
 
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set file type bin
 
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set file name lit
 
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set rec pack 1000
 
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set send pack 1000
 
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set window 5
 
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set transmit linefeed on
 
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* In this example, we assume that your serial port is ttyS0 (first serial port). Change this to correct value if necessary.
 
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* If you use an ''USB <-> Serial'' converter then serial port would surely be named like that: ttyUSB0
 
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** If ''USB <-> Serial'' converter doesn't seem to work, run the ''dmesg'' command. You should read [http://ubuntuforums.org/archive/index.php/t-392791.html this thread] if you see some disconnection data like this :
 
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[ 2445.568000] usb 1-1.4: new full speed USB device using uhci_hcd and address 22
 
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...
 
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[ 2446.964000] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
 
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[ 2446.964000] ftdi_sio 1-1.4:1.0: device disconnected
 
−
 
−
 
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* If you get an error message such:
 
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$ kermit -c
 
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  /dev/ttyS0
 
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  ?SET SPEED has no effect without prior SET LINE
 
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check that you have read/write rights on /dev/ttyS0 (ie your serial port)
 
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===Kermit usage=== 
 
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* To launch it:
 
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$ kermit -c
 
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* To switch from terminal mode to command mode:
 
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CTRL + \ then c
 
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* To switch from command mode to terminal mode:
 
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C-Kermit>c then ENTER
 
  
 
==TFTP server==
 
==TFTP server==

Revision as of 10:53, 4 July 2008

RS232 Terminal configuration

You will need a RS232 terminal emulator to communicate with U-Boot. You can choose between:

We suggest you to use Kermit as Terminal emulator for RS232 connection. Minicom was sadly reported to have problems when communicating with U-Boot (ZModem data transfer). If you just need a simple serial console and not to transfer data through RS232, then GTKTerm is the perfect choice ! (package gtkterm in Ubuntu)

TFTP server

In order to send your image files (U-Boot, Linux, RootFS or Firmware) with higher speed to your Armadeus board, you can use the Ethernet link and a TFTP server. Once the server started, the files located in the server shared directory (/tftpboot by default) will be accessible from the U-Boot TFTP client.

TFTP server installation

  • On *Ubuntu / Debian:
$ sudo apt-get install tftpd xinetd

or use Synaptic

  • On Fedora:
# rpm -q tftpd xinetd
  • Then create the directory that will contain all the files that the server will export (you have to be root to do that):
$ sudo mkdir /tftpboot
$ sudo chmod 777 /tftpboot

Server configuration

  • Edit or create the configuration file /etc/xinetd.d/tftp and modify/add it the following lines:
# default: off
# description: The tftp server serves files using the trivial file transfer
#       protocol.  The tftp protocol is often used to boot diskless
#       workstations, download configuration files to network-aware printers,
#       and to start the installation process for some operating systems.
service tftp
{
       socket_type             = dgram
       protocol                = udp
       wait                    = yes
       user                    = root
       server                  = /usr/sbin/in.tftpd
       server_args             = -s /tftpboot
#       disable                 = yes
}
  • Restart xinetd service:
# killall -HUP xinetd
  • Put some files in /tftpboot

Links

Retrieved from "http://www.armadeus.org/wiki/index.php?title=Communicate_with_your_board_from_a_Linux_Host_(Basics)&oldid=4382"