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AM335x PSP EVM 6.0 suspend to RAM

Dan Huang

Prodigy 30 points

Hi All

Right now I am using Beaglebone Black whci install TI AM335x PSP 6.0 to construct a platform and facing a problem that when I use command " rtcwake -d /dev/rtc0 -m mem -s 20 " to suspend my device for 20 second, the rtc could not wake it up and it stay suspend forever. But comand" rtcwake -d /dev/rtc0 -m standby -s 20 " works, in standby mode the device could be waked up by rtc after 20 seconds.

Have anyone encounter this problem before and how to solve it?

Thanks !

over 12 years ago

0 Abhijeet Deshpande over 12 years ago

Prodigy 245 points

Hi

I am facing similar issues with my Beaglebone White. Do you have any updates?

Please take a look at:

http://e2e.ti.com/support/arm/sitara_arm/f/791/p/274073/990346.aspx#990346

Thanks and Regards,

Abhijeet

0 Dan Huang over 12 years ago in reply to Abhijeet Deshpande

Prodigy 30 points

No updates yet , Actually I am trying to install AM335x PSP 05.06 to see if "rtcwake -d /dev/rtc0 -m mem -s 10" works following your links

If you have some update please let me know

thanks

0 Abhijeet Deshpande over 12 years ago in reply to Dan Huang

Prodigy 245 points

Hi Dan

I have been able to wake up from standby sleep; for some reason wakeup from Save-to-RAM sleep isn't working. Please try:

rtcwake -s 20 -m standby -d /dev/rtc0

[Edit: I just read your first post and noticed that's exactly what you did]

I used SDK 06.00.00 on Beaglebone Black with the kernel changes Joe G mentioned on http://e2e.ti.com/support/arm/sitara_arm/f/791/p/274073/991394.aspx

I will try to get Save-to-RAM working.

Thanks and Regards,

Abhijeet

0 Dan Huang over 12 years ago in reply to Abhijeet Deshpande

Prodigy 30 points

Hi Abhijeet

I am also trying to figure out how to wake up from Save-to-RAM like "rtcwake -s 20 -m mem -d /dev/rtc0" SDK 06.00.00.

I also find that if I use Angstrom 3.8 (the default linux of Beaglebone Black), it can not be waked up from standby sleep,