ATA/IDE disk access using PIO and interrupt

[yan_luo at uml.edu (Yan Luo)]

Sorry, I mean

"I was trying to understand how interrupt works for the PIO as it is said in 
the document (ata.t) that PIO is supported by both polling and INTERRUPT."

----- Original Message ----- 
From: "Yan Luo" <yan_luo at uml.edu>
To: <rtems-users at rtems.com>
Sent: Thursday, May 25, 2006 2:25 PM
Subject: ATA/IDE disk access using PIO and interrupt


> Hello All,
>
> I was trying to understand how interrupt works for the PIO as it is said 
> in the document (ata.t) that PIO is supported by both polling and PIO.
>
> I don't see the IDE_Controller_Table[ctrl_minor].int_driven set to TRUE 
> anywhere in the source tree. That means the interrupt driven PIO is NOT 
> enabled at all.
>
> I tried to set it as true in ide_controller_initialize() in ide_ctrl.c. 
> That caused the RTEMS hang.
>
> How the interrupt for PIO is enabled?
>
> My test is on RTEMS 4.6.2 with fileio example application.
>
> Thanks,
> Yan
>
>