[En-Nut-Discussion] Memory mapped device

[Andrea Cannavicci]

Thanks for your hint!

In effect what I need to know is a free address range.
>From what I know searching on internet, memory mapping from earlier ethernut
board version has not changed much.
Can you tell me the address range you are using?
At the worst way it will doesn't work, but I will have a start point to
begin!

Thanks

----- Original Message ----- 
From: "Ole Reinhardt" <ole.reinhardt at kernelconcepts.de>
To: "Ethernut User Chat (English)" <en-nut-discussion at egnite.de>
Sent: Tuesday, April 05, 2005 10:45 AM
Subject: Re: [En-Nut-Discussion] Memory mapped device


> Hi,
>
> > I must interface a memory mapped device to ethernut 2.1b board.
> > Does anyone have some sample code abuot that?
>
> I don't realy see the problem. The ethernet controller is a good example
> of a memeory mapped device.
>
> What you need:
>
> A memory address decoder to generate a chip select signal (perhaps this
> function is just integrated in your device, like the rtl8019as does?).
> You perhaps could use the/a CPLD for such a function.
>
> You should take a "normal" address that is not yet used by any of the
> on-board devices and address you device like normal memory.
>
> I do not own a Ethernut2.x board, so I can't tell you wich address you
> can use safely.
>
> Hope I could give you a hint.
>
> Regards,
>
> Ole Reinhardt
>
>
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