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Discussion Groups | Comp.Arch.Embedded | Ethernet Terminal I/O board

There are 4 messages in this thread.

You are currently looking at messages 0 to 4.

Ethernet Terminal I/O board - trex - 08:38 21-07-08

Hi everybody,

I am trying to make a ethernet terminal I/O board. Basically making an x86
based 1U solution. I am trying to route the onboard ethernet connection via
a patch cable (Cat6). this works but I also want the link/status leds.

I did a simple PCB with two modular 8P8C Jacks with LEDs and have
connected them back-to-back. The inside Jack connects to my mobo with a
patch cable and the outer Jack connects to a switch on LAN. I need to now
also drive the Link/Status LEDs...

Oh and one more thing i missed out, need to support 10/100/1000 Mbps with
bi color LEDs

Any ideas/help is greatly appreciated



Re: Ethernet Terminal I/O board - 10:03 21-07-08

On Jul 21, 8:38 am, "trex" <shivajee.sha...@gmail.com> wrote:

> I did a simple PCB with two modular 8P8C Jacks with LEDs and have
> connected them back-to-back. The inside Jack connects to my mobo with a
> patch cable and the outer Jack connects to a switch on LAN. I need to now
> also drive the Link/Status LEDs...

You need to look in the manual of your controller (or its ethernet add-
on) and see what kind of support there is for LEDs, then connect into
that.  If there's none, you may be able to do something in the low-
level ethernet drivers and run the LED's off generic programmable IO.

Re: Ethernet Terminal I/O board - trex - 14:35 24-07-08

>On Jul 21, 8:38 am, "trex" <shivajee.sha...@gmail.com> wrote:
>
>> I did a simple PCB with two modular 8P8C Jacks with LEDs and have
>> connected them back-to-back. The inside Jack connects to my mobo with
a
>> patch cable and the outer Jack connects to a switch on LAN. I need to
now
>> also drive the Link/Status LEDs...
>
>You need to look in the manual of your controller (or its ethernet add-
>on) and see what kind of support there is for LEDs, then connect into
>that.  If there's none, you may be able to do something in the low-
>level ethernet drivers and run the LED's off generic programmable IO.
>

I thought of doing it at the OS level, simplest way of which was
monitoring /proc/net/dev entry, but I want to avoid doing it as it eats up
my CPU cycles..

Is there a way i can use comparators to sense the current in the wire,
without weakening the signals and drive a ttl to show the LED status...

Any body has any circuit for doing this

Re: Ethernet Terminal I/O board - trex - 14:38 24-07-08

>On Jul 21, 8:38 am, "trex" <shivajee.sha...@gmail.com> wrote:
>
>> I did a simple PCB with two modular 8P8C Jacks with LEDs and have
>> connected them back-to-back. The inside Jack connects to my mobo with
a
>> patch cable and the outer Jack connects to a switch on LAN. I need to
now
>> also drive the Link/Status LEDs...
>
>You need to look in the manual of your controller (or its ethernet add-
>on) and see what kind of support there is for LEDs, then connect into
>that.  If there's none, you may be able to do something in the low-
>level ethernet drivers and run the LED's off generic programmable IO.
>

I thought of doing it at the OS level, simplest way of which was
monitoring /proc/net/dev entry, but I want to avoid doing it as it eats up
my CPU cycles..

Is there a way i can use comparators to sense the current in the wire,
without weakening the signals and drive a ttl to show the LED status...

Any body has any circuit for doing this