PCMCIA polling!?!

jmouro at iol.pt jmouro at iol.pt
Thu Jun 12 19:15:57 EST 2003

in fact the system I'm working in,
uses the PCMCIA input ports as general purpose input ports.
Some signals are used to configure an Altera FPGA device, and 2 signals are connected to a power supply unit(PSU). The PSU must signal the PPC when a power fail occurs, and this is done by those 2 signals.
Can the system use edge detection and interrupt capability (on those 2 lines - IPA6 IPA7) or shall it perform a polling.
Thanks for your attention

João Mouro

> Dear Jmouro,
> in message <5bf7b05c1bab.5c1bab5bf7b0 at iol.pt> you wrote:
> >
> > I'm working on a embedded system with a  TQM860L, and a I have a
> doubt that perhaps you might answer.
> > I've 2 signals related with system defects (power supply
> defects) connected to PCMCIA channel II (IPBx). Is there a way to
> check if those signals where triggered without polling them? Like
> in interrupt lines? In that way I could
> Maybe you can explain what exactly you are  trying  to  do?  Actually
> there are 4 voltage detect lines: CBVS1/2 (Voltage Sense 1 and 2) and
> CBBVD1/2  (Battery  Voltage  Detect 1 and 2). Interrupts can be abled
> individualy for each of the 4 pins in  the  PCMCIA  Interface  Enable
> Register.
> But normally you don't have to care about this stuff - if you want to
> use a PCMCIA Card with the system the PCMCIA  Card  Services  package
> will  handle  all  such  events.  PCMCIA Card Service support for the
> TQM8xxL modules / STK8xxL starter kit  is  ready  available  -  don't
> re-invent the wheel.
> Best regards,
> Wolfgang Denk
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
> Overdrawn?  But I still have checks left!

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

More information about the Linuxppc-embedded mailing list