adding scripts for Ubuntu on Raspberry Pi

Ubuntu_SafeShutdown.py

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+import RPi.GPIO as GPIO
+import os
+import time
+from multiprocessing import Process
+
+#initialize pins
+powerPin = 3 #pin 5
+ledPin = 14 #TXD
+resetPin = 2 #pin 13
+powerenPin = 4 #pin 5
+
+#initialize GPIO settings
+def init():
+    GPIO.setwarnings(False)
+    GPIO.setmode(GPIO.BCM)
+    GPIO.setup(powerPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+    GPIO.setup(resetPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+    GPIO.setup(ledPin, GPIO.OUT)
+    GPIO.output(ledPin, GPIO.HIGH)
+    GPIO.setup(powerenPin, GPIO.OUT)
+    GPIO.output(powerenPin, GPIO.HIGH)
+
+#waits for user to hold button up to 1 second before issuing poweroff command
+def poweroff():
+    while True:
+        #self.assertEqual(GPIO.input(powerPin), GPIO.LOW)
+        GPIO.wait_for_edge(powerPin, GPIO.FALLING)
+        print("Powering off in 5 seconds")
+        os.system("sleep 5s")
+        os.system("poweroff")
+
+#blinks the LED to signal button being pushed
+def ledBlink():
+    while True:
+        GPIO.output(ledPin, GPIO.HIGH)
+        #self.assertEqual(GPIO.input(powerPin), GPIO.LOW)
+        GPIO.wait_for_edge(powerPin, GPIO.FALLING)
+        start = time.time()
+        while GPIO.input(powerPin) == GPIO.LOW:
+            GPIO.output(ledPin, GPIO.LOW)
+            time.sleep(0.2)
+            GPIO.output(ledPin, GPIO.HIGH)
+            time.sleep(0.2)
+
+#resets the pi
+def reset():
+    while True:
+        #self.assertEqual(GPIO.input(resetPin), GPIO.LOW)
+        GPIO.wait_for_edge(resetPin, GPIO.FALLING)
+        print("Reseting in 5 seconds")
+        os.system("sleep 5s")
+        os.system("shutdown -r now")
+
+
+if __name__ == "__main__":
+    #initialize GPIO settings
+    init()
+    #create a multiprocessing.Process instance for each function to enable parallelism 
+    powerProcess = Process(target = poweroff)
+    powerProcess.start()
+    ledProcess = Process(target = ledBlink)
+    ledProcess.start()
+    resetProcess = Process(target = reset)
+    resetProcess.start()
+
+    powerProcess.join()
+    ledProcess.join()
+    resetProcess.join()
+
+    GPIO.cleanup()
+

Ubuntu_install.sh

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+#!/bin/bash
+
+SourcePath=https://raw.githubusercontent.com/RetroFlag/retroflag-picase/master
+
+#Check if root--------------------------------------
+if [[ $EUID -ne 0 ]]; then
+   echo "Please execute script as root." 
+   exit 1
+fi
+#-----------------------------------------------------------
+
+echo "Installing Python GPIO library"
+sudo apt update
+sudo apt install python3-rpi.gpio
+
+#RetroFlag pw io ;2:in ;3:in ;4:in ;14:out 1----------------------------------------
+File=/boot/firmware/config.txt
+wget -O  "/boot/firmware/overlays/RetroFlag_pw_io.dtbo" "$SourcePath/RetroFlag_pw_io.dtbo"
+if grep -q "RetroFlag_pw_io" "$File";
+    then
+        sed -i '/RetroFlag_pw_io/c dtoverlay=RetroFlag_pw_io.dtbo' $File 
+        echo "PW IO fix."
+    else
+        echo "dtoverlay=RetroFlag_pw_io.dtbo" >> $File
+        echo "PW IO enabled."
+fi
+if grep -q "enable_uart" "$File";
+    then
+        sed -i '/enable_uart/c enable_uart=1' $File 
+        echo "UART fix."
+    else
+        echo "enable_uart=1" >> $File
+        echo "UART enabled."
+fi
+
+#-----------------------------------------------------------
+
+#Download Python script-----------------------------
+sudo mkdir "/opt/RetroFlag"
+script=/opt/RetroFlag/Ubuntu_SafeShutdown.py
+wget -O $script "$SourcePath/Ubuntu_SafeShutdown.py"
+
+#Enable Python script to run on start up------------
+RC=/etc/rc.local
+
+if grep -q "/usr/bin/python3 $script &" "$RC";
+    then
+        echo "File $RC already configured. Doing nothing."
+    else
+        echo "#!/bin/bash
+/usr/bin/python3 /opt/RetroFlag/Ubuntu_SafeShutdown.py &
+exit 0" >> "$RC"
+        sudo chown root /etc/rc.local
+        sudo chmod 755 /etc/rc.local
+        echo "File /etc/rc.local configured."
+fi
+#-----------------------------------------------------------
+
+#Reboot to apply changes----------------------------
+echo "RetroFlag Pi Case installation done. Will now reboot after 5 seconds."
+sleep 5
+sudo reboot
+#-----------------------------------------------------------
+