Well, what I did so far was setup mem_stcfg1/mem_staddr1.
What I'm having trouble with is, what values do I need to
Set in mem_staddr1, and then, how do I access
That memory (mmap? Driver?).
[mailto:firstname.lastname@example.org] בשם Pete Popov
נשלח: Wednesday, November 24, 2004 7:58 PM
אל: Gilad Rom
נושא: Re: Au1500 Chip Select
Gilad Rom wrote:
> 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
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.