Nicolas FERRE wrote:
>
> Hi,
> I am a newbie in the RTLinux world and I have a little problem running
> an example I have translated from RTAI to RTL...
>
> It is dealing with interrupts and the parallel port, RTAI version has
> written by Phil Wilshire. I have found it at Real Time Linux Workshop
> www site :
> http://www.thinkingnerds.com/projects/rtl-ws/presentations.html
>
> The problem is, when I signal the /ACK pin (10) with a switch: It works,
> but it doesn't when I try to trigger it using the high to low signal
> provided by pin 9.
> Is it a timing problem ? what's wrong ?...
>
> I enclose the code: just untar add your rtl.mk and make...
> Thanks in advance for your help...
>
I think you'll find that the interrupt needs a low to high transition to
trigger it.
The switch works because it bounces.
Try that and let me know if it works.
Regards
Phil Wilshire
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