Difference between revisions of "Communicate"
(factorize RS232) |
(http://www.linuxhomenetworking.com is down) |
||
(20 intermediate revisions by 4 users not shown) | |||
Line 3: | Line 3: | ||
==Forewords== | ==Forewords== | ||
− | The default connection uses a simple RS232 Null-Modem cable (with or without USB<->serial adapter). | + | The default connection uses a simple Serial Link either with a RS232 Null-Modem cable (with or without USB<->serial adapter) or with a miniUSB cable ([[APF51]] / [[APF28]] / [[APF6]]). |
− | As you will have to transfer some | + | |
− | In order to use these two | + | As you will have to transfer some MBytes of data, the Ethernet link is nice to have, if not mandatory.<br> |
+ | In order to use these two ways of transfer with the APF target, a terminal emulator (for Serial link) and a TFTP server (for Ethernet link) have to be configured. | ||
</noinclude> | </noinclude> | ||
At this stage, you should have something looking like that (IP addresses may change):<br><br> | At this stage, you should have something looking like that (IP addresses may change):<br><br> | ||
Line 16: | Line 17: | ||
Once the server configured, the files located in the server shared directory (''/tftpboot'' by default) will be accessible from the U-Boot/Linux TFTP clients. | Once the server configured, the files located in the server shared directory (''/tftpboot'' by default) will be accessible from the U-Boot/Linux TFTP clients. | ||
− | ===TFTP server installation=== | + | ===TFTP server installation=== |
− | * On *Ubuntu / Debian: | + | ====Install packages==== |
+ | {| cellpadding="20" cellspacing="0" | ||
+ | |* On *Ubuntu / Debian: | ||
<pre class="host"> | <pre class="host"> | ||
− | + | $ sudo apt-get install tftpd xinetd | |
</pre> | </pre> | ||
− | or use | + | or use your preferred graphical package manager |
− | * On Fedora: | + | || |
+ | |* On Fedora: | ||
<pre class="host"> | <pre class="host"> | ||
− | + | $ rpm -q tftpd xinetd | |
</pre> | </pre> | ||
+ | || | ||
+ | |* On OpenSUSE 11.3: | ||
+ | <pre class="host"> | ||
+ | sudo zypper install tftp yast2-tftp-server | ||
+ | sudo yast2 tftp-server | ||
+ | </pre> | ||
+ | Choose Enable to start the TFTP server. It might be required to open the TFTP port in your firewall. | ||
+ | For more details see: [http://en.opensuse.org/SDB:YaST_TFTP_Server YaST TFTP Server on OpenSUSE site] | ||
+ | |} | ||
− | * Then create the directory that will contain all the files that the server will export | + | ====Create server's directory==== |
+ | * Then create the directory (''/tftpboot/'') that will contain all the files that the server will export: | ||
<pre class="host"> | <pre class="host"> | ||
− | + | $ sudo mkdir /tftpboot | |
− | + | $ sudo chmod 777 /tftpboot | |
</pre> | </pre> | ||
===Server configuration=== | ===Server configuration=== | ||
− | * | + | * '''As root user''' edit or create the ''/etc/xinetd.d/tftp'' configuration file and modify/add it the following lines: |
# default: off | # default: off | ||
# description: The tftp server serves files using the trivial file transfer | # description: The tftp server serves files using the trivial file transfer | ||
Line 50: | Line 64: | ||
# disable = yes | # disable = yes | ||
} | } | ||
− | + | ||
* Restart xinetd service: | * Restart xinetd service: | ||
<pre class="host"> | <pre class="host"> | ||
− | + | $ sudo killall -HUP xinetd | |
</pre> | </pre> | ||
<noinclude> | <noinclude> | ||
− | For more information regarding how-to setup a | + | For more information regarding how-to setup a TFTP server please check one of many Web How-to: |
− | + | ||
* [https://linuxlink.timesys.com/docs/linux_tftp Another how-to configure a TFTP Server for Linux] | * [https://linuxlink.timesys.com/docs/linux_tftp Another how-to configure a TFTP Server for Linux] | ||
* [http://www.webune.com/forums/how-to-install-tftp-server-in-linux.html till another how-to...] | * [http://www.webune.com/forums/how-to-install-tftp-server-in-linux.html till another how-to...] | ||
* [http://doc.ubuntu-fr.org/tftpd ubuntu TFTP server documentation in French] | * [http://doc.ubuntu-fr.org/tftpd ubuntu TFTP server documentation in French] | ||
+ | |||
+ | === Troubleshooting === | ||
+ | |||
+ | ====Timeout in U-Boot==== | ||
+ | *On recent Debian distribution (sid?), it seems that installing ''ckermit'' package may switch inetd server from ''xinetd'' to ''openbsd-inetd''. If you fall in that case, then you have to configure ''/etc/inetd.conf'' by adding the following line: | ||
+ | <pre class=host> | ||
+ | tftp dgram udp wait nobody /usr/sbin/tcpd /usr/sbin/in.tftpd -s /tftpboot | ||
+ | </pre> | ||
+ | * Then restart inetd: | ||
+ | <pre class=host> | ||
+ | /etc/init.d/openbsd-inetd restart | ||
+ | </pre> | ||
+ | |||
+ | ====Connection refused==== | ||
+ | It looks like xinetd configuration is not sufficient in some recent versions of this tool. IPv6 is enabled by default and seems to be not compatible with the TFTP protocol. A simple inetd configuration should work for people who have this problem (''connection refused'' in system logs with addresses like ::ffff:192.168.0.100). | ||
+ | |||
+ | * Edit (as root user) - if necessary - the ''/etc/inetd.conf'' file and add this line: | ||
+ | <pre> | ||
+ | tftp dgram udp wait nobody /usr/sbin/tcpd /usr/sbin/in.tftpd -s /tftpboot | ||
+ | </pre> | ||
+ | |||
+ | * Install inetd tools | ||
+ | |||
+ | On Ubuntu/Debian | ||
+ | <pre> | ||
+ | $ sudo apt-get install inetutils-tools | ||
+ | </pre> | ||
+ | |||
+ | * Setup the hosts rules: edit (as root user) ''/etc/hosts.allow'' and add the following lines: | ||
+ | <pre> | ||
+ | in.tftpd: ALL | ||
+ | tftpd: ALL | ||
+ | </pre> | ||
+ | |||
+ | * Restart inetd | ||
+ | <pre> | ||
+ | $ /etc/init.d/openbsd-inetd restart | ||
+ | </pre> | ||
+ | |||
+ | It's done... and should work for most people. | ||
==Links== | ==Links== | ||
Line 69: | Line 122: | ||
* [http://www.webune.com/forums/how-to-install-tftp-server-in-linux.html till another how-to...] | * [http://www.webune.com/forums/how-to-install-tftp-server-in-linux.html till another how-to...] | ||
* [http://doc.ubuntu-fr.org/tftpd ubuntu TFTP server documentation in French] | * [http://doc.ubuntu-fr.org/tftpd ubuntu TFTP server documentation in French] | ||
− | * [[ | + | * [[Connection_with_U-Boot_under_Windows | configuring RS-232 and TFTP on Windows to communicate with your board]] |
</noinclude> | </noinclude> |
Latest revision as of 11:17, 15 April 2021
How-To connect your Armadeus board to your development Host.
Contents
Forewords
The default connection uses a simple Serial Link either with a RS232 Null-Modem cable (with or without USB<->serial adapter) or with a miniUSB cable (APF51 / APF28 / APF6).
As you will have to transfer some MBytes of data, the Ethernet link is nice to have, if not mandatory.
In order to use these two ways of transfer with the APF target, a terminal emulator (for Serial link) and a TFTP server (for Ethernet link) have to be configured.
At this stage, you should have something looking like that (IP addresses may change):
Serial Terminal configuration
You will need a Serial terminal emulator to communicate with U-Boot/Linux console. You can choose between:
We suggest you to use Kermit as Terminal emulator. 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 the serial link, then GTKTerm is the perfect choice ! (gtkterm package in Ubuntu)
TFTP server
In order to send your image files (U-Boot, Linux, rootfs or FPGA's firmware) at higher speed (than serial port) to your Armadeus board, you can use the Ethernet link and a TFTP server. Once the server configured, the files located in the server shared directory (/tftpboot by default) will be accessible from the U-Boot/Linux TFTP clients.
TFTP server installation
Install packages
* On *Ubuntu / Debian:
$ sudo apt-get install tftpd xinetd or use your preferred graphical package manager |
* On Fedora:
$ rpm -q tftpd xinetd |
* On OpenSUSE 11.3:
sudo zypper install tftp yast2-tftp-server sudo yast2 tftp-server Choose Enable to start the TFTP server. It might be required to open the TFTP port in your firewall. For more details see: YaST TFTP Server on OpenSUSE site |
Create server's directory
- Then create the directory (/tftpboot/) that will contain all the files that the server will export:
$ sudo mkdir /tftpboot $ sudo chmod 777 /tftpboot
Server configuration
- As root user edit or create the /etc/xinetd.d/tftp configuration file 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:
$ sudo killall -HUP xinetd
For more information regarding how-to setup a TFTP server please check one of many Web How-to:
- Another how-to configure a TFTP Server for Linux
- till another how-to...
- ubuntu TFTP server documentation in French
Troubleshooting
Timeout in U-Boot
- On recent Debian distribution (sid?), it seems that installing ckermit package may switch inetd server from xinetd to openbsd-inetd. If you fall in that case, then you have to configure /etc/inetd.conf by adding the following line:
tftp dgram udp wait nobody /usr/sbin/tcpd /usr/sbin/in.tftpd -s /tftpboot
- Then restart inetd:
/etc/init.d/openbsd-inetd restart
Connection refused
It looks like xinetd configuration is not sufficient in some recent versions of this tool. IPv6 is enabled by default and seems to be not compatible with the TFTP protocol. A simple inetd configuration should work for people who have this problem (connection refused in system logs with addresses like ::ffff:192.168.0.100).
- Edit (as root user) - if necessary - the /etc/inetd.conf file and add this line:
tftp dgram udp wait nobody /usr/sbin/tcpd /usr/sbin/in.tftpd -s /tftpboot
- Install inetd tools
On Ubuntu/Debian
$ sudo apt-get install inetutils-tools
- Setup the hosts rules: edit (as root user) /etc/hosts.allow and add the following lines:
in.tftpd: ALL tftpd: ALL
- Restart inetd
$ /etc/init.d/openbsd-inetd restart
It's done... and should work for most people.