Re: mpc / linux kernel - user space

["Sampath Kumar" <sampath@spartanlabs.com>]

Hi,

Write an ioctl method in your module. And provide provision in ioctl to take
a function pointer & store it.
Whenever there is an timer interrupt, check for this pointer, if not NULL ,
then you can call the function. When your application comes up, makesure u
pass the command to ioctl of your module with the function pointer as arg.

Hope this help !

Regards
Sampath
----- Original Message -----
From: Juergen Oberhofer <e9826367@student.tuwien.ac.at>
To: <linuxppc-embedded@lists.linuxppc.org>
Sent: Thursday, November 27, 2003 9:37 PM
Subject: mpc / linux kernel - user space


>
> Hi,
>
> I have a module and an application program in user space:
>
> The Module performs the following task: at init it initializes the cpm
> timer register of the mpc823,
> such that an interrupt is generated every x microseconds. Thus, I
> installed an interrupt handling function f that handles the timer
> interrupts.
>
> My problem is that the module / the interrupt handling function should
> execute a procedure defined in the application program. How can I pass a
> pointer (which points to that function) from the appl.program to the
> module, such that the handler can execute this function every x
> milliseconds? I thought to create a procedure in the module that accepts
> a function pointer as argument. But how can I achieve, that this module
> procedure is visible to the application program? Does somebody have a
> suggestion or know another way to do it?
>
> Regards,
> Juergen
>
>
>


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