Re: Au1500 Chip Select

[Pete Popov <ppopov@embeddedalley.com>]

Gilad Rom wrote:

> Hello,
>
> I am trying to implement a simple program which
> Will be used to communicate with an I/O peripheral 
> Over CS1 (Chip select 1) of the au1500.
I'm not sure I understand what you're trying to do. The chip select is setup by 
the boot loader or kernel, and you don't touch it anymore. The CS will get 
asserted/deasserted based on the addresses you're trying to access.
> Has anyone ever attempted this? Could someone 
> Point me to some sample code, perhaps? I am grepping
> Through the kernel, yet having trouble locating
> Chip-select specific code for reference.
Again, what sort of an example are you looking for?  Setting up a chip select on 
the Au1x is nothing more than writing the appropriate values to the 3 chip 
select registers. Then you're done.
Pete