RetroBSD

2.11BSD operating system for microcontrollers
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 Post subject: Interesting PHY...
PostPosted: Tue Nov 01, 2016 11:21 am 
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I was tinkering around looking at Ethernet MII PHY chips, and I came across one that sparked an interesting idea in my mind.


The Micrel (owned by Microchip IIRC) KSZ8864CNX/RMNUB. It has two MII interfaces and two PHY interfaces within it, along with a fully managed switch (which does VLAN tagging and everything).

For the uneducated, an MII interface connects to a PIC32MZ, and a PHY connects to an RJ45 socket (via magnetics).

That means you can have two PIC32MZ chips running LiteBSD connected together through ethernet, along with one or two ethernet socket(s).

Instant LiteBSD cluster :)

With two RJ45 connections you can link multiple boards together - instant LiteBSD *big* cluster :)

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 Post subject: Re: Interesting PHY...
PostPosted: Tue Nov 01, 2016 6:17 pm 
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.. a cluster like
http://blog.everpi.net/2016/01/placa-de ... zeros.html
http://blog.everpi.net/2016/02/placa-de ... -zero.html
:)

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 Post subject: Re: Interesting PHY...
PostPosted: Tue Nov 01, 2016 8:00 pm 
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Yeah, but cooler since it's MIPS :P

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 Post subject: Re: Interesting PHY...
PostPosted: Wed Nov 02, 2016 4:01 am 
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Joined: Mon Nov 12, 2012 1:34 pm
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Hi Matt,

Nice.

Or you could hook Serge's FPGA to 2nd MII port.

I wonder if a small PCB with that chip, jacks and maybe one LiteBSD/RetroBSD PIC32 MZ would get some sort of following?

Wiz


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 Post subject: Re: Interesting PHY...
PostPosted: Wed Nov 02, 2016 9:47 am 

Joined: Mon Nov 24, 2014 1:07 pm
Posts: 58
The Micrel now Microchip PHY's are really good, well supported and you can get samples of them too. I'm sure I mentioned on here last year about the KSZ8873 so you could effectively connect LiteBSD to a network and sniff packets at the same time. A sort of man in the middle if you like.

I still have yet to make a board and attach one though, too many fun projects and fully fledged products on the go to spend time on it though. Maybe one day, famous last words!

Dan


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