2008-11-25 11:45:40 GPIO Wakeup with BF537 and uClinux-dist2008R1.5

Patrick Hotz (GERMANY)

Message: 65794

Hi,

i have a new problem with my CM-BF537 Board.

I want to wake up the Blackfin with the PF4 gpio-port.

This is my config....

"Default Power Saving mode"

(*) Sleep Deeper

"Power Management options"

(*) Cause Wakeup Event by GPIO

(4) Wakeup GPIO number

GPIO Polarity

(*) Active Low

I set the Blackfin into sleep mode during write "standby into /sys/power/state...

root:/dev> echo standby >/sys/power/state

Stopping tasks ... done.

Suspending console(s)

but i can´t wake it up......

can anybody help me?

Patrick

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2008-11-25 18:24:59 Re: GPIO Wakeup with BF537 and uClinux-dist2008R1.5

Robin Getz (UNITED STATES)

Message: 65804

Patrick:

It depends on the part - On the 537, Hibernate - only can be waken up from (all of which are controlled in the VR_CTL register):

RTC event or assertion of the RESET pin

External GP event, or PHY event (only on one pin - the PHY_INT/PH6).

Activity on the CANRX pin.

There is no way to wake up from PF4 from hibernate. You will need to stay at a higher power level.

-Robin

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2008-11-27 08:10:00 Re: GPIO Wakeup with BF537 and uClinux-dist2008R1.5

Patrick Hotz (GERMANY)

Message: 65906

I have tried with "Sleep" mode instead "Deep Sleep" but there is the same problem.

The other problem i have is that i can´t read the gpio´s with the "simple-gpio-test".

root:/dev> simple-gpio-test gpio4

Going to sleep until the gpio goes high.

(if this is a button, you should push it

nothing happens although i set the GPIO4 (PF4 on BF537) on high.

I think i can´t read the states of the gpio´s.....

Is there any good way to read or set the values of the gpio´s ?