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Altera_Forum's avatar
Altera_Forum
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9 years ago

Cyclone V Linux - Ethernet (TCP/IP) - Question

Hey guys! :) I've been really confused recently since I got the DE0-SoC board :P (I've worked with Nios and some Texas Instruments DSPs, but never with Linux). In the project I'm developi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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Hey buddy.

First thing you need to know is how to establish a connection or how to connect to your board.

You can configure PuTTy to connect through an FTP connection (there are plenty of tutorials on how to do this in the rocketboards forum). Also, you can set an static ip using connman (there are tutorials at the rocketboards forum and some other tutorials that approach the Beagle BB board from TI). You will want to do this if you wanna use TCP/IP (so your address will become static, which means Linux will startup with the address you did choose. Also if you wanna ssh the board (it is another style of communication that uses the OTG cable) you have to know the address of the board (the command you run in Linux is ssh root@board_ip - my case is ~ssh root@192.168.7.1~).

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Hi,

I have met some problems when trying to connect my board and my PC through a switch. Before that, I used an old router for the Ethernet connections. The connection was established successfully. udhcpc command return an IP address and i was able to perform scp function on Altera Soc EDS command shell to transfer the file to the board. However, when I change the old router with a new switch, the connection cannot be established. The udhcpc command return infinite "Sending discover...". Without IP address, the files cannot be transferred. I was told that since only my laptop and the board were connected to the switch, there is no DHCP in the network and udhcpc could not return an IP address. Hence I was told to set up a static IP address instead. However, after setting up static IP address using ifconfig eth0, the files still couldn't be transferred. It shows connection timed out when I try to scp file to the IP address set earlier. I have read other solutions but its just getting more confused.

My question is

1. Why the udhcpc can return IP address even though at that time, only laptop and the board are connected to the router?

2. Should I set up a static IP address for my laptop as well? If that is so, how can I do that?

PS: I am a total newbie in linux and networking. Appreciate for any helps given.

Below attached are the screenshot taken on Putty and Altera SoC EDS https://alteraforum.com/forum/attachment.php?attachmentid=14182&stc=1
  • AAjit2's avatar
    AAjit2
    Icon for New Contributor rankNew Contributor
    5 years ago

    1. Why the udhcpc can return IP address even though at that time, only laptop and the board are connected to the router?

    A. This is because a local IP address is created, not a network one and you can still connect and send files to this address.

    2. Should I set up a static IP address for my laptop as well? If that is so, how can I do that?

    A. I had a similar problem and I set up a static IP although not through boot. So in the terminal/command shell of the HPS (root), I used ifconfig to show me the ethernet connection which was eth0.

    ifconfig eth0 down

    ifconfig eth0 198.xx.xxx.xx (whatever IP you want to use)

    reconfirm using "ifconfig" command, if the ip address is not there try "ifconfig eth0 up"

    This should set up your static IP address, however note that you have to redo this upon restart, if you don't want to do that best to declare this in boot which is a more complicated process.

    I realise that this is a really late, but putting it out there for those that stumble upon this