Enhanced Encoder support and new GPIO Pinout to enchance compatibility with I2S DAC

misc/sampleconfigs/gpio-buttons.py.rotaryencoder.sample

@@ -0,0 +1,31 @@
+#!/usr/bin/python3
+from gpiozero import Button
+from signal import pause
+from subprocess import check_call
+
+# This script is compatible with any I2S DAC e.g. from Hifiberry, Justboom, ES9023, PCM5102A
+# Only Buttons that have dissimilar functions as the two encoder are enabled
+
+# 2018-10-15
+# this script has the `pull_up=True` for all pins. See the following link for additional info: 
+# https://github.com/MiczFlor/RPi-Jukebox-RFID/issues/259#issuecomment-430007446
+#
+# 2017-12-12
+# This script was copied from the following RPi forum post:
+# https://forum-raspberrypi.de/forum/thread/13144-projekt-jukebox4kids-jukebox-fuer-kinder/?postID=312257#post312257
+# I have not yet had the time to test is, so I placed it in the misc folder.
+# If anybody has ideas or tests or experience regarding this solution, please create pull requests or contact me.
+
+def def_shutdown():
+    check_call("./scripts/playout_controls.sh -c=shutdown", shell=True)
+
+def def_halt():
+    check_call("./scripts/playout_controls.sh -c=playerpause", shell=True)
+
+shut = Button(3, hold_time=2)
+halt = Button(24,pull_up=True)
+
+shut.when_held = def_shutdown
+halt.when_pressed = def_halt
+
+pause()

misc/sampleconfigs/gpio-buttons.py.sample

@@ -3,6 +3,9 @@ from gpiozero import Button
 from signal import pause
 from subprocess import check_call
 
+# This script will block any I2S DAC e.g. from Hifiberry, Justboom, ES9023, PCM5102A
+# due to the assignment of GPIO 19 and 21 to a buttons
+
 # 2018-10-31
 # Added the function on holding volume + - buttons to change the volume in 0.3s interval
 #

misc/sampleconfigs/phoniebox-rotary-encoder.service.stretch-default.sample

@@ -5,7 +5,9 @@ After=network.target iptables.service firewalld.service
 [Service]
 Restart=always
 WorkingDirectory=/home/pi/RPi-Jukebox-RFID
-ExecStart=/home/pi/RPi-Jukebox-RFID/scripts/rotary-encoder.py
+ExecStart=/usr/bin/python2 /home/pi/RPi-Jukebox-RFID/scripts/rotary-encoder.py
+User=pi
+Group=pi
 
 [Install]
 WantedBy=multi-user.target

scripts/ky040.py

@@ -10,49 +10,28 @@
 
 class KY040:
 
-    def __init__(self, arg_clockPin, arg_dataPin, arg_switchPin=None, arg_rotaryCallbackCW=None, arg_rotaryCallbackCCW=None, arg_switchCallback=None, arg_rotaryBouncetime=100, arg_switchBouncetime=200):
+    def __init__(self, arg_clockPin, arg_dataPin, arg_rotaryCallbackCW=None, arg_rotaryCallbackCCW=None, arg_rotaryBouncetime=100, arg_switchBouncetime=100):
         # persist values
         self.clockPin = arg_clockPin
         self.dataPin = arg_dataPin
-        self.switchPin = arg_switchPin
         self.rotaryCallbackCW = arg_rotaryCallbackCW
         self.rotaryCallbackCCW = arg_rotaryCallbackCCW
-        self.switchCallback = arg_switchCallback
         self.rotaryBouncetime = arg_rotaryBouncetime
-        self.switchBouncetime = arg_switchBouncetime
 
         # setup pins
-        # data and clock have pullups at the PCB
-        GPIO.setup(self.clockPin, GPIO.IN)
-        GPIO.setup(self.dataPin, GPIO.IN)
-
-        if None != self.switchPin:
-            GPIO.setup(self.switchPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+        GPIO.setup(self.clockPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+        GPIO.setup(self.dataPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 
     def start(self):
         GPIO.add_event_detect(self.clockPin, GPIO.FALLING, callback=self._clockCallback, bouncetime=self.rotaryBouncetime)
 
-        if None != self.switchPin:
-            GPIO.add_event_detect(self.switchPin, GPIO.FALLING, callback=self._switchCallback, bouncetime=self.switchBouncetime)
-
     def stop(self):
         GPIO.remove_event_detect(self.clockPin)
 
-        if None != self.switchPin:
-            GPIO.remove_event_detect(self.switchPin)
-
     def _clockCallback(self, pin):
         if GPIO.input(self.clockPin) == 0:
             data = GPIO.input(self.dataPin)
             if data == 1:
                 self.rotaryCallbackCCW()
             else:
                 self.rotaryCallbackCW()
-
-    def _switchCallback(self, pin):
-        if None == self.switchPin:
-            return
-
-        if GPIO.input(self.switchPin) == 0:
-            self.switchCallback()
-

scripts/rotary-encoder.py

@@ -1,24 +1,29 @@
 #!/usr/bin/python3
-# rotary volume knob
+# rotary volume and track knob
+# This script is compatible with any I2S DAC e.g. from Hifiberry, Justboom, ES9023, PCM5102A
+# Please combine with corresponding gpio button script, which handels the button functionality of the encoder
+# RPi-Jukebox-RFID/misc/sampleconfigs/gpio-buttons.py.rotaryencoder.sample
+
 # these files belong all together:
 # RPi-Jukebox-RFID/scripts/rotary-encoder.py
 # RPi-Jukebox-RFID/scripts/ky040.py
 # RPi-Jukebox-RFID/misc/sampleconfigs/phoniebox-rotary-encoder.service.stretch-default.sample
+# RPi-Jukebox-RFID/misc/sampleconfigs/gpio-buttons.py.rotaryencoder.sample
 # See wiki for more info: https://github.com/MiczFlor/RPi-Jukebox-RFID/wiki
 
 #
-# circuit diagram
+# circuit diagram for one of two possible encoders (volume), use GPIOs from code below for the tracks
 # (capacitors are optionally)
 #
 #       .---------------.                      .---------------.
 #       |               |                      |               |
-#       |           CLK |------o---------------| GPIO 5        |
+#       |           CLK |------o---------------| GPIO 5       |
 #       |               |      |               |               |
-#       |           DT  |------)----o----------| GPIO 6        |
+#       |           DT  |------)----o----------| GPIO 6       |
 #       |               |      |    |          |               |
-#       |           SW  |------)----)----------| GPIO 13       |
+#       |           SW  |------)----)----------| GPIO 3        |
 #       |               |      |    |          |               |
-#       |           +   |------)----)----------| 5V            |
+#       |           +   |------)----)----------| 3.3V          |
 #       |               |      |    |          |               |
 #       |           GND |------)----)----------| GND           |
 #       |               |      |    |          |               |
@@ -40,33 +45,42 @@
 from subprocess import check_call
 
 
-def rotaryChangeCW():
+def rotaryChangeCWVol():
    check_call("./scripts/playout_controls.sh -c=volumeup", shell=True)
 
-def rotaryChangeCCW():
+def rotaryChangeCCWVol():
    check_call("./scripts/playout_controls.sh -c=volumedown", shell=True)
 
-def switchPressed(dummy):
-   check_call("./scripts/playout_controls.sh -c=mute", shell=True)
+def rotaryChangeCWTrack():
+   check_call("./scripts/playout_controls.sh -c=playernext", shell=True)
+
+def rotaryChangeCCWTrack():
+   check_call("./scripts/playout_controls.sh -c=playerprev", shell=True)
 
 
 if __name__ == "__main__":
 
-   CLOCKPIN = 5
-   DATAPIN = 6
-   SWITCHPIN = 13
+   CLOCKPINVol = 5 
+   DATAPINVol = 6
+
+   CLOCKPINTrack = 22
+   DATAPINTrack = 23
 
    GPIO.setmode(GPIO.BCM)
 
-   ky040 = KY040(CLOCKPIN, DATAPIN, SWITCHPIN, rotaryChangeCW, rotaryChangeCCW, switchPressed)
+   ky040Vol = KY040(CLOCKPINVol, DATAPINVol, rotaryChangeCWVol, rotaryChangeCCWVol)
+
+   ky040Track = KY040(CLOCKPINTrack, DATAPINTrack, rotaryChangeCWTrack, rotaryChangeCCWTrack)
 
-   ky040.start()
+   ky040Vol.start()
+   ky040Track.start()
 
    try:
       while True:
          time.sleep(0.2)
    finally:
-      ky040.stop()
+      ky040Vol.stop()
+      ky040Track.stop()
       GPIO.cleanup()