GPIO ADDON & OPENELEC

jernej

campioncino replied at 2016-12-11 12:09
I have some problem when i try to switch off the fan controlled by a pin.

I don't know why it remai ...

Thanks for reminding me to remove gpio_sunxi module. It is not better than standard sysfs gpio interface and Allwinner already stopped using it.

About your problem: oppai is right, shutdown in GUI actually does suspend. It was discussed before and I won't change it to shutdown. Your problem can be easily solved by using systemd service file. For example, LED systemd service file solves almost same problem, so you can reuse it:
https://github.com/jernejsk/Open ... nxi-suspend.service

ExecStart is executed when system goes to suspend and ExecStop is executed when system is resumed.

According to this page:
http://wiki.openelec.tv/index.php/Mounting_network_shares

you should place service file in /storage/.config/system.d/ and then execute command "systemctl enable <yourservice>.service"

Be aware that I didn't try this, so there might be some additional steps.

campioncino

Thanks a lot jernej.
I'll try.

campioncino

According with the LED example I create my own service

1. [Unit]
   
2. Description=fan suspend service
   
3. Before=sleep.target
   
4. StopWhenUnneeded=yes
   
5. 
   
6. [Service]
   
7. Type=oneshot
   
8. RemainAfterExit=yes
   
9. ExecStart=-/bin/sh -c "echo 110 > /sys/class/gpio/export; echo "out" > /sys/class/gpio/gpio110/direction; echo 1 > /sys/class/gpio/gpio110/value"
   
10. ExecStop=-/bin/sh -c "echo 0 > /sys/class/gpio/gpio110/value"
    
11. 
    
12. [Install]
    
13. WantedBy=sleep.target
    

Copy code

Placed the service file in /storage/.config/system.d/ and then execute command "systemctl enable fan-suspend.service" And get :

Created symlink from /storage/.config/system.d/sleep.target.wants/fan-suspend.service to /storage/.config/system.d/fan-suspend.service.

But nothing happend, the fan still remain active.


I add also a fan-start service

1. [Unit]
   
2. Description=fan loader
   
3. After=network.target
   
4. 
   
5. [Service]
   
6. Type=simple
   
7. RemainAfterExit=no
   
8. ExecStart=-/bin/sh -c "echo 110 > /sys/class/gpio/export; echo "out" > /sys/class/gpio/gpio110/direction; echo 1 > /sys/class/gpio/gpio110/value"
   
9. ExecStop=-/bin/sh -c "echo 0 > /sys/class/gpio/gpio110/value"
   
10. [Install]
    
11. WantedBy=network.target

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In this way I can start the fan...but I cannot switch off.

jernej

Try invert ExecStart and ExecStop. IIRC, start means action at suspend and stop means action at resume. AFAIK, export and direction settings need to be done only once, at first use.

campioncino

I feel stupid.


It's correct, now it works.That's the complete working solution
Fan-start.service

1. #bin/sh
   
2. [Unit]
   
3. Description=fan loader
   
4. After=network.target
   
5. 
   
6. [Service]
   
7. Type=simple
   
8. RemainAfterExit=no
   
9. ExecStop=-/bin/sh -c "echo 110 > /sys/class/gpio/export; echo out > /sys/class/gpio/gpio110/direction; echo 1 > /sys/cla$
   
10. ExecStart=-/bin/sh -c "echo 0 > /sys/class/gpio/gpio110/value"
    
11. 
    
12. [Install]
    
13. WantedBy=network.target
    

Copy code

Fan-suspend.service

1. #bin/sh
   
2. [Unit]
   
3. Description=fan suspend service
   
4. Before=sleep.target
   
5. StopWhenUnneeded=yes
   
6. 
   
7. [Service]
   
8. Type=oneshot
   
9. RemainAfterExit=yes
   
10. ExecStop=-/bin/sh -c "echo 110 > /sys/class/gpio/export; echo "out" > /sys/class/gpio/gpio110/direction; echo 1 > /sys/c$
    
11. ExecStart=-/bin/sh -c "echo 0 > /sys/class/gpio/gpio110/value"
    
12. 
    
13. [Install]
    
14. WantedBy=sleep.target

Copy code

So, I ask another "stupid" question. There is a way to wake it up after suspend? Using remote controller o CEC or ...

jernej

campioncino replied at 2016-12-20 19:44
I feel stupid.

There is FAQ for "stupid" questions, even for this. It is under IR remote.

Sergey_3d

jernej replied at 2016-12-21 05:32
There is FAQ for "stupid" questions, even for this. It is under IR remote.

Good afternoon. How to program the automatic switching on or off the fan on the GPIO PIN when reaching a certain temperature to cool the Orange PI?