System wake up on Alarm2

durai samy

Other Parts Discussed in Thread: AM3354

Hi,

We have requirement from customer It must be possible to program two wake up times to the internal Realtimeclock and system should wake up on two alarms (alarm1 and alarm2) triggers.

Below is the our environment setup,

Board: Custom made

Processor: AM3354

SDK: 7

Linux :3.12

I have referred the below link for rtc wake up alarm

The below command is working perfect . The system is waking from standby mode after 5 sec.

rtcwake -d /dev/rtc0 -m standby -s 5

My question is which alarm is used for wake up? If it does with alarm1, how we can implement with alarm2?

Regards
Durai

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Hi,

ALARM2 is used to wake up the processor from RTC-only mode. See sections 20.3.3.8 and 8.1.4.3.5 in the AM335X TRM Rev. L.

0 Biser Gatchev-XID over 11 years ago in reply to Biser Gatchev-XID

TI__Guru**** 393215 points

Also see this wiki: http://processors.wiki.ti.com/index.php/Linux_Core_Power_Management_User's_Guide_(v3.14)#RTC-Only_and_RTC.2BDDR_Mode

0 durai samy over 11 years ago in reply to Biser Gatchev-XID

Intellectual 515 points

Hi Biser,

Thanks for your prompt reply,

As I understand from device user manual and given link the ALARM2 is used to control the "pmic_power_en" to ON/OFF system with predefined time period. We have used the alarm2 for shutdown the our system when shutdown button clicked in GUI.

I want to know which alarm is used for rtcwake command "rtcwake -d /dev/rtc0 -m standby -s 5"

Regards
Durai

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System wake up on Alarm2