[En-Nut-Discussion] Memory mapped device

[Ole Reinhardt]

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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