GPIO ADDON & OPENELEC

Boten

it's still non responsive, i even tried to turn all the wpi out & on without success! i feel like the GPIO library is not responsive at all.

As i said before, i'm trying to run a 5V fan:

jernej

Ok, I forgot to mention few things. Those pins are 3.3V only and they can provide only 10mA of current or so. Both of these two ratings are too low, especially current is waaay too low. What you need is an additional circuit like this here: http://elinux.org/RPi_GPIO_Interface_Circuits#Using_a_FET But first, please check with multimeter that you can really control those pins. If you are ok with always on fan, you can simply connect it to +5V and GND.

Boten

jernej replied at 2016-10-17 23:48
Ok, I forgot to mention few things. Those pins are 3.3V only and they can provide only 10mA of curre ...

sounds a bit complicated... that's the think i'm not ok with fan always on, it needs to be run depending the temp.

jernej

Actually, instructions are the simplest one. I guess you should ask someone who has some knowledge about electronics and soldering. It is basic stuff. Pins (GPIOs) on SoCs are meant only to signal, so they don't need much current or voltage to do that. To actually drive something, you need some kind of electronic switch. Transistors, especially MOSFETs, are good for that. Well, it is more complicated than that, but for your understanding it is ok.

tom123

I can confirm that library is working, congratulations on your work. Now I'll work on input mode(switch, rotary encoder). Any sugguestions?

Giachi

Thank you Jernej for your work. I will try to use this library for connect a power off button.

jernej

Giachi replied at 2016-11-6 19:28
Thank you Jernej for your work. I will try to use this library for connect a power off button.

It is not a library, just "gpio" program. Same functionality could be achieved trough sysfs...

Giachi

jernej replied at 2016-11-7 05:53
It is not a library, just "gpio" program. Same functionality could be achieved trough sysfs...

excuse me for the mistaked word. I will try this plugin connecting a button for power off use.

campioncino

I have some problem when i try to switch off the fan controlled by a pin.

I don't know why it remains active.

I switch on my pin on startup (that's my autostart.sh)  At startup it also activate acestream -- and it works!

1. (modprobe gpio-sunxi;
   
2. echo 1 > /sys/class/gpio_sw/PD14/data;)&
   
3. (
   
4. /storage/.config/.acestream/start_acestream.sh --client-console
   
5. --live-cache-type disk
   
6. )&

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The problems are in my shutdown.sh because the fan does not turn off always. I suppose that some case are missing.

1. #!/bin/sh
   
2. 
   
3. case "$1" in
   
4.   halt)
   
5.     echo 0 > /sys/class/gpio_sw/PD14/data
   
6.     ;;
   
7.   poweroff)
   
8.         echo 0 > /sys/class/gpio_sw/PD14/data
   
9.     ;;
   
10.   reboot)
    
11.         echo 0 > /sys/class/gpio_sw/PD14/data
    
12.     ;;
    
13.   *)
    
14.         /storage/.config/.acestream/stop_acestream.sh
    
15.         echo 0 > /sys/class/gpio_sw/PD14/data
    
16.     ;;
    
17. esac
    
18. 
    
19. #(
    
20. 
    
21. #/storage/.config/.acestream/stop_acestream.sh
    
22. #)&
    

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So it works when - from console - I type "reboot" or "shutdown".
It doesn't work when I choose the shutdown button from UI.
From UI works on the reboot button.


Help and suggestions are appreciated.

oppai

It sounds like that almost work but only shutdown button doesn't work.
if so as for me also shutdown button works as suspend.
I don't know whether it is related.