Re: PCMCIA polling!?!

Re: PCMCIA polling!?!

[jmouro]

Hi,
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

Jo=E3o Mouro


> Dear Jmouro,
>
> in message <5bf7b05c1bab.5c1bab5bf7b0@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@denx.de
> Overdrawn?  But I still have checks left!
>
>


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

Re: PCMCIA polling!?!

[Wolfgang Denk]

In message <5f23aa5f1089.5f10895f23aa@iol.pt> you wrote:
>
> in fact the system I'm working in,
> uses the PCMCIA input ports as general purpose input ports.

I see.

> Can the system use edge detection and interrupt capability (on those 2 li
> nes - IPA6 IPA7) or shall it perform a polling.

I already answered this question:

> > 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.


Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
The one who says it cannot be done should never interrupt the one who
is doing it.

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

PCMCIA polling!?!

[jmouro]

Hello,
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
Thanks for your attention.
jmouro


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

Re: PCMCIA polling!?!

[Wolfgang Denk]

Dear Jmouro,

in message <5bf7b05c1bab.5c1bab5bf7b0@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@denx.de
Overdrawn?  But I still have checks left!

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