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List:       uclinux-dev
Subject:    Re: [uClinux-dev] about PIO/GPIO uclinux driver for DE2
From:       Michael Schnell <mschnell () lumino ! de>
Date:       2009-07-27 7:13:17
Message-ID: 4A6D538D.9030409 () lumino ! de
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hotmail wrote:
> Hello,
>  
> I am doing a multi-core research project based on uclinux and DE2.
> Does anyone has reference for PIO/GPIO driver for uclinux-DE2?
>  


Is DE2 the Altera demo board ?

AFAIK, a PIO driver is provided with the uCLinux for NIOS.

see: http://www.nioswiki.com/OperatingSystems/UClinux

Alternatively you can do a driver that MMaps the PIO in userspace
see:
http://www.nioswiki.com/Accessing_hardware_registers_from_user_space_programs


or use "uio" to access the PIO from a user space program

or do a nasty user space hack with the no-MMU-NIOS Architecture to
access the PIO .

-Michael
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