same funcionality as the music rocket

code/piplayer2.py

@@ -1,22 +1,21 @@
 # piplayer2
 # http://www.tilman.de/piplayer2
-
 import RPi.GPIO as GPIO
 import logging
 import time
 import subprocess
-import select  # see http://stackoverflow.com/a/10759061/3761783
+import select  # for polling zbarcam, see http://stackoverflow.com/a/10759061/3761783
 import os
 
 
 # Configuration
-MUSIC_BASE_DIRECTORY = "/home/pi/audio/"
+MUSIC_BASE_DIRECTORY = "/home/pi/music/"
 SOUND_SCANNING = "/home/pi/piplayer2/sounds/scanning.mp3"
 SOUND_OK = "/home/pi/piplayer2/sounds/ok.mp3"
 SOUND_SCAN_FAIL = "/home/pi/piplayer2/sounds/fail.mp3"
-SOUND_PLAYBACK_ERROR = "/home/pi/piplayer2/sounds/no.mp3"
+SOUND_PLAYBACK_ERROR = "/home/pi/piplayer2/sounds/error.mp3"
 QR_SCANNER_TIMEOUT = 3
-BUTTON_PAUSE = 0.4
+BUTTON_PAUSE = 400
 
 
 logging.basicConfig(level=logging.DEBUG, format='%(asctime)s.%(msecs)d %(levelname)s - %(message)s')
@@ -41,8 +40,23 @@ GPIO.setup(10, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 
 
+def btn1_callback(channel):
+    logging.debug('mocp --previous')
+    subprocess.call(["mocp", "--previous"])
 
-photo_sensor_still_active = False
+def btn2_callback(channel):
+    logging.debug('mocp --toggle-pause')
+    subprocess.call(["mocp", "--toggle-pause"])
+
+def btn3_callback(channel):
+    logging.debug('mocp --next')
+    subprocess.call(["mocp", "--next"])
+    
+    
+
+GPIO.add_event_detect(9, GPIO.FALLING, callback=btn1_callback, bouncetime=BUTTON_PAUSE)
+GPIO.add_event_detect(10, GPIO.FALLING, callback=btn2_callback, bouncetime=BUTTON_PAUSE)
+GPIO.add_event_detect(11, GPIO.FALLING, callback=btn3_callback, bouncetime=BUTTON_PAUSE)
 
 try:
     logging.info('Start moc server')
@@ -51,27 +65,9 @@ try:
     subprocess.call(["mocp", "-l", SOUND_OK])
     
     while True:
-        time.sleep(0.05)
+        logging.debug('Wait for photo sensor')
+        GPIO.wait_for_edge(17, GPIO.RISING)
         
-        if (GPIO.input(9) == False):
-            logging.debug('mocp --previous')
-            subprocess.call(["mocp", "--previous"])
-            time.sleep(BUTTON_PAUSE)
-            # TODO wait for ~0.25 s, if button is still pressed, seek instead of skipping
-    
-        if (GPIO.input(10) == False):
-            logging.debug('mocp --toggle-pause')
-            subprocess.call(["mocp", "--toggle-pause"])
-            time.sleep(BUTTON_PAUSE)
-    
-        if (GPIO.input(11) == False):
-            logging.debug('mocp --next')
-            subprocess.call(["mocp", "--next"])
-            time.sleep(BUTTON_PAUSE)
-            # TODO wait for ~0.25 s, if button is still pressed, seek instead of skipping
-        
-        # check photo sensor
-        if ((not photo_sensor_still_active) and (GPIO.input(17) == GPIO.HIGH)):
         logging.debug('Photo sensor active, activating light and camera')
         subprocess.call(["mocp", "-l", SOUND_SCANNING])
         
@@ -79,7 +75,7 @@ try:
         GPIO.output(27, GPIO.HIGH)
         
         # scan QR code
-            zbarcam = subprocess.Popen(['zbarcam', '--nodisplay', '--raw', '-Sdisable', '-Sqrcode.enable', '--prescale=320x240', '/dev/video0'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        zbarcam = subprocess.Popen(['zbarcam', '--quiet', '--nodisplay', '--raw', '-Sdisable', '-Sqrcode.enable', '--prescale=320x240', '/dev/video0'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         
         poll_obj = select.poll()
         poll_obj.register(zbarcam.stdout, select.POLLIN)
@@ -93,7 +89,6 @@ try:
         if (poll_result):
             
             try:
-                
                 qr_code = zbarcam.stdout.readline().rstrip()
                 qr_code = qr_code.decode("utf-8") # python3
                 logging.debug("QR Code: {}".format(qr_code))
@@ -140,7 +135,6 @@ try:
                     logging.debug("Add directory {}".format(directory))
                     subprocess.check_call(["mocp", "-a", "."])
                 
-                    # subprocess.check_call(["mocp", "-a", target, "-p"])
                 logging.debug("Start playback")
                 subprocess.check_call(["mocp", "-p"])
                 
@@ -151,26 +145,31 @@ try:
             except FileNotFoundError as e:
                 logging.debug("Could not open directory {}".format(directory))
                 subprocess.call(["mocp", "-l", SOUND_PLAYBACK_ERROR])
+
         else:
             logging.debug('Timeout on zbarcam')
             subprocess.call(["mocp", "-l", SOUND_SCAN_FAIL])
             
-            # consider the photo sensor to be blocked
-            photo_sensor_still_active = True
-            
         zbarcam.terminate()
         
         # LED off
         GPIO.output(27, GPIO.LOW)
 
-        elif (GPIO.input(17) == GPIO.LOW):
+        # wait until sensor is not blocked anymore
-            # the photo sensor is not blocked (anymore)
+        if (GPIO.input(17) == GPIO.HIGH):
-            photo_sensor_still_active = False
+            GPIO.wait_for_edge(17, GPIO.FALLING)
+            time.sleep(1)
 
         
 # Exit when Ctrl-C is pressed
 except KeyboardInterrupt:
+    logging.info('Shutdown')
+    
+finally:
     logging.info('Close moc server')
     subprocess.call(["mocp", "--exit"])
     logging.info('Reset GPIO configuration and close')
     GPIO.cleanup()
+
+
+

code/test/interrupts.py

@@ -8,7 +8,7 @@ GPIO.setup(9, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 GPIO.setup(10, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 
-#sensor on PIN 17
+# Sensor on PIN 17
 GPIO.setup(17, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
 
 def btn1_callback(channel):

installation.txt

@@ -39,6 +39,7 @@ sudo nano /boot/config.txt
 #	dtparam=act_led_trigger=none
 #	dtparam=act_led_activelow=off
 
+# configure NTP
 sudo apt install ntp
 sudo /etc/init.d/ntp restart
 sudo nano /etc/ntp.conf
@@ -52,10 +53,17 @@ sudo apt install lirc zbar-tools mc moc fswebcam python3 python-rpi.gpio python3
 # PHAT DAC (https://learn.pimoroni.com/tutorial/phat/raspberry-pi-phat-dac-install)
 curl -sS get.pimoroni.com/phatdac | bash
 
+# check for errors
+dmesg
+
 # MP3-Test
 mocp
 sudo nano /etc/modprobe.d/alsa-base.conf
 
+# Webcam-Auflösung bestimmen (http://askubuntu.com/questions/214977/how-can-i-find-out-the-supported-webcam-resolutions)
+lsusb
+lsusb -s 001:006 -v | egrep "Width|Height"
+
 # Webcam-Test
 python3 lighton.py
 sudo fswebcam -r 320x240 -d /dev/video0 -v ~/test.jpg