Difference between revisions of "Communicate with your board from a Linux Host (Basics)"
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===Kermit configuration=== | ===Kermit configuration=== | ||
− | * Edit/Create .kermrc file in your $HOME directory and put | + | * Edit/Create .kermrc file in your $HOME directory and put in it: |
set line /dev/ttyS0 | set line /dev/ttyS0 | ||
set speed 115200 | set speed 115200 | ||
Line 26: | Line 26: | ||
set transmit linefeed on | set transmit linefeed on | ||
* In this example, we assume that your serial port is ttyS0 (first serial port). Change this to correct value if necessary. | * In this example, we assume that your serial port is ttyS0 (first serial port). Change this to correct value if necessary. | ||
− | * If you use an USB<->Serial converter then serial port would surely be named like that: ttyUSB0 | + | * If you use an ''USB <-> Serial'' converter then serial port would surely be named like that: ttyUSB0 |
− | * If you get an error message such | + | * If you get an error message such: |
$ kermit -c | $ kermit -c | ||
/dev/ttyS0 | /dev/ttyS0 | ||
?SET SPEED has no effect without prior SET LINE | ?SET SPEED has no effect without prior SET LINE | ||
− | check that you have read/write rights on /dev/ttyS0 ( | + | check that you have read/write rights on /dev/ttyS0 (ie your serial port) |
− | + | ||
===Kermit usage=== | ===Kermit usage=== |
Revision as of 20:20, 4 November 2007
Contents
RS232 configuration
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 then GTKTerm is the perfect choice ! (package gtkterm in Ubuntu)
Kermit installation
- On Ubuntu:
apt-get install ckermit
or use Synaptic graphical package manager.
- On Fedora:
rpm -q ckermit
Kermit configuration
- Edit/Create .kermrc file in your $HOME directory and put in it:
set line /dev/ttyS0 set speed 115200 set carrier-watch off set handshake none set flow-control none robust set file type bin set file name lit set rec pack 1000 set send pack 1000 set window 5 set transmit linefeed on
- In this example, we assume that your serial port is ttyS0 (first serial port). Change this to correct value if necessary.
- If you use an USB <-> Serial converter then serial port would surely be named like that: ttyUSB0
- If you get an error message such:
$ kermit -c /dev/ttyS0 ?SET SPEED has no effect without prior SET LINE
check that you have read/write rights on /dev/ttyS0 (ie your serial port)
Kermit usage
- To launch it:
$ kermit -c
- To switch from terminal mode to command mode:
CTRL + \ + c
- To switch from command mode to terminal mode:
C-Kermit>c
TFTP server
In order to send your image files (U-Boot, Linux zImage, rootfs ...) with higher speed to the armadeus board, you can use 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:
# 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):
# mkdir /tftpboot # 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