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cyperghost

@Semper-5 Use sudo command for this

echo "$GPIOpin2" > /sys/class/gpio/export
echo "out" > /sys/class/gpio/gpio$GPIOpin2/direction
echo "1" > /sys/class/gpio/gpio$GPIOpin2/value

With GPIOpin2=25 it will be a self runner ;)

@Yahmez Ah so you tried out without using the pullups? That's interesting. So I should investigate this ;) As I said: No POLOLU switch, no testing area.

So I say thank you to both of you! You should integrate a small 3,3V regulator. Then it's no problem to generate this. So intead of

python os.system("sudo shutdown -h now")

hook to a stripped down script with sudo command

# Detect PID or EMULATOR NAMES
emucall="$(sed '4!d; s/\([\\"]\|[[:alnum:]_]\+=[^ ]* \)//g; s/[][(){}^$*.|+? ]/\\&/g' /dev/shm/runcommand.info)"
espid="$(pgrep -f "/opt/retropie/supplementary/.*/emulationstation([^.]|$)")"

# Handle calls and send TERM signal
if [[ -n "$emucall" ]]; then
    emupid="$(pgrep -f "$emucall" | tr '\n' ' ')"
    pkill -P "$(echo $emupid | tr ' ' ',')"
    kill -9 "$emupid"
    sleep 4
fi    

if [[ -n "$espid" ]]; then
    touch /tmp/es-shutdown && chown pi:pi /tmp/es-shutdown
    kill "$espid"
    exit
fi

poweroff

Yahmez

@cyperghost it's not just the Pololu, but the way everything is wired in the case, the existing switches plus the added parts to convert it for safe shutdown. The Pololu on it's own is straight forward. Pin 25 has a diode between it's self and the switch to protect it from the 5v. It's internal pullup pulls it high. When you hit the switch it connects to ground and pulls gpio 25 down, which the script detects and initiates the shutdown.

cyperghost

@Yahmez But what is the difference to connect a GPIO directly to ground (maybe over an external resistor) or to activate the internal ones? I see there no difference. Maybe you can explain, me?

The internal pullup prevents from floating... yes.. but where is the difference?

Yahmez

@cyperghost Not sure what you mean about the 3.3v regulator but the pin needs a pull-up resistor to work. It can be a physical resistor added to the circuit from the pi's 3.3v rail or it can be the internal pullup. I used the internal pullup in my tutorial because it was cheaper and easier.

You want the pin to be high by default, detect a low, then shutdown.

If you can get the internal pullups working thru bash, it should all work. If you can not, than how about stripping out the shutdown part from my script and calling the bash to exit es and shutdown? Basically have the python handle the pins and the bash handle the exit and shutdown...

cyperghost

@yahmez Well a regulator would convert the 5.0V to 3.3V (just a few cents) are use the internal 3.3V rail... or strip down the script ... Already done here

Thank you for your patience and helpfull explaination. So it would be nice that you would implent this in your scripts.
It has to be excuted with sudo command

Yahmez

@cyperghost no problem. Unfortunately, I do not have the knowledge to properly incorporate your script into mine. At best, it would be trial and error on my part. Perhaps @Semper-5 can tinker with it though.

cyperghost

@yahmez Well.... I can also try to deal with raspi-gpio
Let us work together on this if you want.
sudo apt install raspi-gpio will install a 66kB binary

help page ;)

  raspi-gpio get [GPIO]
OR
  raspi-gpio set <GPIO> [options]
OR
  raspi-gpio funcs [GPIO]
OR
  raspi-gpio raw

Valid [options] for raspi-gpio set are:
  ip      set GPIO as input
  op      set GPIO as output
  a0-a5   set GPIO to alternate function alt0-alt5
  pu      set GPIO in-pad pull up
  pd      set GPIO pin-pad pull down
  pn      set GPIO pull none (no pull)
  dh      set GPIO to drive to high (1) level (only valid if set to be an outpu$
  dl      set GPIO to drive low (0) level (only valid if set to be an output)
Examples:
  raspi-gpio get              Prints state of all GPIOs one per line
  raspi-gpio get 20           Prints state of GPIO20
  raspi-gpio set 20 a5        Set GPIO20 to ALT5 function (GPCLK0)
  raspi-gpio set 20 pu        Enable GPIO20 ~50k in-pad pull up
  raspi-gpio set 20 pd        Enable GPIO20 ~50k in-pad pull down
  raspi-gpio set 20 op        Set GPIO20 to be an output
  raspi-gpio set 20 dl        Set GPIO20 to output low/zero (must already be se$
  raspi-gpio set 20 ip pd     Set GPIO20 to input with pull down

@Semper-5 Ready for some tests?

Semper 5

@cyperghost oh I'm excited to do some testing :)

Forgive me in advance if my replies are a bit far and few between this weekend. I packed up my system to take home but I'll be doing a lot of errands and driving. I'll check in as frequent as I can. Thank you once again team for your efforts!

Let's kick this can of worms!

cyperghost

@semper-5

Please install raspi-gpio, this tool gives BASH control over internal pullup resistors ;)
install with sudo apt install raspi-gpio
That are just 66kB ;)

Then copy script as done times before, make it executable and execute it in SSH ;)
I'm not sure if it needs sudo privileges.

If it is not working, then you may alter until [[ $power == 0 ]] from 0 to 1
If this is sill not working then alter raspi-gpio set $GPIO_powerswitch ip pu from pu to pd
So all in all you have 4 possibilites ;)

then the new switch.sh

#!/bin/bash
# End Emulationstation if condition of running binary is true (v1.7)
# v1.00 07/21/17 by cyperghost - Inital run 
# v1.50 07/27/17 - Great step to exit ES even if emulators is running by runcommand.sh are started // meleu
# v1.56 07/30/17 - All emulators will be detected. // meleu
# v1.58 08/02/17 - generel method: Use PPID to detect child PIDs now (ScummVM fix) // cyperghost
# v1.59 11/14/17 - Inserted newest emucall detection // meleu
# v1.60 04/20/18 - added kill -9 to terminate emulators // julenvitoria
# v1.70 version for NESPi case // Yahmez, Semper-5

# Please install raspi-gpio via sudo apt install raspi-gpio before!

#this is the GPIO pin connected to POWER SWITCH
GPIO_powerswitch=24

#this is the GPIO pin connected to POWER ON CONTROL
GPIO_powerctrl=25

# Init ...
raspi-gpio set $GPIO_powerswitch ip pu
raspi-gpio set $GPIO_powerctrl op dh

until [[ $power == 0 ]]; do
    power=$(raspi-gpio get $GPIO_powerswitch | grep -c "level=1 fsel=0 func=INPUT")
    sleep 1
done

# Detect PID or EMULATOR NAMES
emucall="$(sed '4!d; s/\([\\"]\|[[:alnum:]_]\+=[^ ]* \)//g; s/[][(){}^$*.|+? ]/\\&/g' /dev/shm/runcommand.info)"
espid="$(pgrep -f "/opt/retropie/supplementary/.*/emulationstation([^.]|$)")"

echo "Button Pressed pullup going from 1 to 0: $power"
echo "ES-PID: $espid"
sleep 5

# Handle calls and send TERM signal

if [[ -n "$emucall" ]]; then
    emupid="$(pgrep -f "$emucall" | tr '\n' ' ')"
    pkill -P "$(echo $emupid | tr ' ' ',')"
    kill -9 "$emupid"
    sleep 4
fi

if [[ -n "$espid" ]]; then
    touch /tmp/es-shutdown && chown pi:pi /tmp/es-shutdown
    kill "$espid"
    exit
fi

echo "Script terminated not by ES!"

Thanks for your patience!

@Yahmez I tested the script on my old Pi1B+. Just connected a momentary push button to GPIO24 and to ground. Works flawless if I press the button. On default (no button action) the GPIO24 status is 1, if the button is pressed the pullup is dropped to 0 and the loop is breaked! Got an excellent knowledge base from you - Thx.

@Semper-5
If you need guidance then don't hestiate to ask. But I think the script should work out of the box after installing the raspi-gpio binary

Semper 5

EUREKA! IT WORKS!

Just some minor bumps in the road...some emulators/ports I can add games/entries and they'll save to favorites but can't be removed (they can be removed but on a power down, power up, they remain added). I'm going to be doing some updating from sources to see if this will fix it, but this is a huge leap in the right way team :D

Also to add, this has been tested on the 4.4 Retropie image

cyperghost

@semper-5 Thx ;)

Now I have ready setted script for you!
This got working power button
If you press reset and a emulator is running it will fire you back to ES
If you are in ES and press reset again ES will reload!

It's uses the same script base as here but is much much extended!

Use the same procedure to install script as always....

But now it supports parameters:
in your case: scriptname.sh --nespicase &

Get this thread here

Semper 5

@cyperghost I had a chance to update the script to its entirety from your thread and using your parameters, but unfortunately I'm set back a bit.

I ran the script with its parameter in SSH and it was complaining about not finding commands, but with executing it, it immediately starts a shutdown command and does not keep any favorites tagged. It's a good thing I didn't put it into the autostart.sh or else it'd probably start up and shutdown as soon as ES was loaded.

SSH output screenshot

cyperghost

Well I don't know why this is don't running.
Did you have raspi-gpio installed?

Please do so with sudo apt install raspi-gpio

Then cd /home/pi/RetroPie/scripts

Then wget https://raw.githubusercontent.com/crcerror/ES-generic-shutdown/master/multi_switch.sh && chmod +x multi_switch.sh

Then run the scripts via SSH
./multi_switch.sh --nespicase &

You don't need sudo, you don't need the bash interpreter to call, all automatic done ;)

caver01

@cyperghost I think there is an unmatched single quote' in the script text above, or maybe a " that should be a ' in the emucall. See how the comment # Handle calls and send TERM signal is the wrong color? Something is not right in one of the commands above that.

cyperghost

@caver01 No the script is working ;)
But raspi-gpio is not installed ;) As command is not found
The ticks are taken from the original script.

caver01

@cyperghost Ok, fair enough, but you see how the colors are messed up before that comment, right?

cyperghost

Oh... No I get you ;)

We are talking about this one here

The other script was just for testing purposes if I understand the logic of the NESPICase mod done by @Yahmez

By the way..... BASH is also capable of handling the pullup resistors.
That's very nice, becasue now you just connect the switch with an GPIO to GROUND!

raspi-gpio set YOURGPIONr ip pu sets up internal pull up resistor
Now the PULLUP is setted 1 if it's not connected to ground
Press the button and connect to ground and the pull is set to 0

the logic

until [[ $power == 0 ]]; do
power=$(raspi-gpio get $GPIO_powerswitch | grep -c "level=1 fsel=0 func=INPUT")
done

caver01

@cyperghost Oh. Ok. Wow. That thing is getting pretty huge. I need to dig into this a bit. I like where things are going.

cyperghost

@caver01 Yes I posted a comment above

but I like also to use the command line parameters

--es-pid shows PID of ES binary, if ES isn't running then it's 0
--rc-pid shows PID of runcoomand, if no runcommand (=emulator) is running then it's 0

kind of swiss knife

Semper 5

@cyperghost ok we're back to having power button functionality but no metadata saving. I was able to quickly catch it complaining about the gameslist.xml:

here's my ES log