Experimental Physics and
Industrial Control System

[email protected] (Jeff Hill) · Wed, 5 Jul 2000 10:02:45 -0600

There are files in base {devLib.h, devLib.c} which attempt
to isolate device drivers from operating system variations, and 
also attempts to detect conflicts where two different device drivers 
are configured to use the same hardware resources. This code
does attempt to detect when two device drivers are attaching
to the same interrupt vector. The vxWorks services are a bit weak in 
this area and so some small additional 68k architecture dependent 
support code was provided, but there is currently no support for this 
on Pentium/486/386 or on PPC architectures although I cant imagine
that it would be difficult for some site to make the necessary 
extensions.

This code has been mostly dormant for several years. It could
probably use more active management. We would certainly welcome
any assistance volunteered from persons interested in upgrading 
or extending it.

Jeff

> -----Original Message-----
> From: Dmitrovskiy Alexei [mailto:[email protected]]
> Sent: Tuesday, July 04, 2000 4:25 AM
> To: [email protected]
> Subject: Interrupts
> 
> 
> Hello,
> 
> Does anyone have an idea how to manage the allocation of interrupt vectors
> while working with IOCs?
> For IP modules it could be solved on the IPAC driver level, but what about
> other specific drivers (to rewrite?!.)...
> As I understand at the moment interrupt vectors are fixed for each device
> driver according to a programmer taste. Could this situation be improved?
> At DESY we have integrated an inhouse-made IOC hardware (GPFC) developed
> together with IHEP (Russia). Our new device drivers for IP modules are built
> around Andrew's IPAC driver.
> In case of the GPFC usage ipmIntConnect calls a function administrating
> interrupts vectors. Slight changes were necessary in the IPAC driver.
> What's about other platforms and more heterogeneous systems? How can an
> intelligent management of available vector numbers be achieved?
> 
> Let's make our life better! :)
> 
> Regards,
> Alexei (together with Bernd Schoeneburg).
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System