Table of Contents
Wake up using IR remote controller and HDMI CEC
The current ODROID-C2 U-Boot supports Wake-Up functionality after Power Off.
You can do Power-on ODROID-C2 using the power key of HK's Remote Controller and CEC source signal.
This functionality makes just 30mW power increase compared with the old U-Boot.
- Ubuntu : Available with 3.14.79-82 (Sep 19, 2016) or higher version
- Android : Available with Android v2.2 release (Sep 06, 2016) or higher version
And you can refer to the following wiki page to check U-Boot version on user space. Your U-Boot version should be same or higher than the above two release dates.
http://odroid.com/dokuwiki/doku.php?id=en:c2_building_u-boot#how_to_check_u-boot_version_on_user_space
The ODROID user, Kwiboo implemented IR and CEC wake-up sequences for LibreELEC.
Thank you, Kwiboo!
http://forum.odroid.com/viewtopic.php?f=139&t=23073#p155601
https://github.com/hardkernel/u-boot/issues/26
How to Wake Up (1) using IR Remote Controller
The available IR remote key is power key of HK's IR remote controller.
Manufacturer Code : 0x4DB2 IR code of Power Button : 0xDC Key Code : 0x23dc4db2
After power off using shutdown -P or poweroff, pushing Power Button will make ODROID-C2 wake-up and go booting process.
# shutdown -P ... [ 47.067156] reboot: Power down INFO: PSCI Affinity Map: INFO: AffInst: Level 0, MPID 0x0, State ON INFO: AffInst: Level 0, MPID 0x1, State ON INFO: AffInst: Level 0, MPID 0x2, State ON INFO: AffInst: Level 0, MPID 0x3, State ON ERprocess cCEC cfg:0x2f set vddee to 0x0352mv ->> Enter Power Off ... ->> Press Power Button GXBB:BL1:08dafd:0a8993;FEAT:EDFC318C;POC:3;RCY:0;EMMC:0;READ:0;CHK:0; TE: 91385 no sdio debug board detected BL2 Built : 11:44:26, Nov 25 2015. Board ID = 8 set vcck to 1100 mv set vddee to 1050 mv CPU clk: 1536MHz DDR channel setting: DDR0 Rank0+1 same DDR0: 2048MB(auto) @ 912MHz(2T)-13 Run bl30... Wait bl30...Done Sending bl301.....OK. Run bl301... chipidLoad bl33 from eMMC, src: 0x00034200, des: 0x01000000, size: 0x0006a6f0 secure task start! high task start! low task start! NOTICE: BL3-1: v1.0(debug):4d2e34d NOTICE: BL3-1: Built : 17:08:35, Oct 29 2015 INFO: BL3-1: Initializing runtime services INFO: BL3-1: Preparing for EL3 exit to normal world INFO: BL3-1: Next image address = 0x1000000 INFO: BL3-1: Next image spsr = 0x3c9 U-Boot 2015.01-00180-g1471870-dirty (Nov 08 2016 - 17:05:58)
How to Wake Up (2) using HDMI CEC
If your monitor supports CEC functionalities, after power off, you can find HDMI-CEC ODROID-C2 component among the external inputs on your monitor as following.
To make the connection with ODROID-C2, select the HDMI-CEC ODROID-C2 source.
Then, it makes ODROID-C2 will process the normal booting sequence.
A Brief Sequence Diagram
The below diagram shows a wake-up sequence.
The relevant commits have been merged middle of August, 2016 and you can find the history on HK u-boot github.
https://github.com/hardkernel/u-boot/commits/odroidc2-v2015.01
But be warned, we've seperated bl301 firmware source code from u-boot repository because of the issue of build failure on other platforms except X86-64 and support issue of build root.
So, if you want to adjust the routine or change the key code by yourself, please refer to the following wiki page.
http://odroid.com/dokuwiki/doku.php?id=en:c2_building_u-boot#how_to_build_u-boot_with_bl301_firmware
Power consumption in power-off state
ODROID-C2 consumes only 0.3Watt approximately in the power-off state even the IR receiver and CEC blocks are alive.
