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Ci-dessous, les différences entre deux révisions de la page.

--- materiel:rpi:gpio:accueil [2016/12/05 19:16]
resonance [RPI - GPIO]
+++ materiel:rpi:gpio:accueil [2018/05/15 16:16] (Version actuelle)
resonance
@@ Ligne 4: / Ligne 4: @@
+===== Ligne de commande =====
+ Elevate your permissions to root user to allow IO access
+sudo -i
+Setup to control pin as output
+Substitute 23 in the following commands for your GPIO number (GPIO, not pin number)
+echo "23" > /sys/class/gpio/export
+echo "out" > /sys/class/gpio/gpio23/direction
+Control Output State
+echo "1" > /sys/class/gpio/gpio23/value
+echo "0" > /sys/class/gpio/gpio23/value
+Setup to read pin as an input
+Substitute 23 in the following commands for your GPIO number (GPIO, not pin number)
+echo "23" > /sys/class/gpio/export
+echo "in" > /sys/class/gpio/gpio23/direction
+Read its state
+cat /sys/class/gpio/gpio23/value
+To Release A Pin Afterwards
+echo "23" > /sys/class/gpio/unexport
+===== Avec Python =====
 Avec la  biblio RPI.gpio et la biblio gpiozero :
 Here’s a list of devices which currently supported:
@@ Ligne 71: / Ligne 110: @@
 </WRAP>
 </WRAP>
+**Lancer une fonction**
+<code python>
+from gpiozero import Button
+from signal import pause
+def say_hello():
+	print("Hello!")
+button = Button(2)
+button.when_pressed = say_hello
+pause()
+</code>
+**Lancer un programme**
+<code python>
+from gpiozero import Button
+from signal import pause
+import subprocess
+button = Button(2)
+button.wait_for_press()
+subprocess.call(['omxplayer test.mkv'], shell=True)
+</code>
+**Déclencher deux sons avec deux boutons**
+Avec Pygame : http://nerdparadise.com/tech/python/pygame/basics/part3/
+<WRAP center round info 60%>
+  * FORMATS MP3 POSSIBLES AVEC pygame.mixer.music.load("Got-inspiration.mp3")
+  * FORMATS WAVE AVEC sound =  pygame.mixer.Sound("/usr/share/scratch/Media/Sounds/Electronic/Zoop.wav"). The Sound can be loaded from an OGG audio file or from an uncompressed WAV.
+</WRAP>
+<code python>
+from gpiozero import Button
+from signal import pause
+import pygame
+b1 = Button(2)
+b2 = Button(3)
+pygame.mixer.init()
+son1 =pygame.mixer.Sound('/usr/share/scratch/Media/Sounds/Electronic/Zoop.wav')
+son2 =pygame.mixer.Sound('/usr/share/scratch/Media/Sounds/Electronic/Laser1.wav')
+def launch_sound1():
+    son1.play()
+def launch_sound2():
+    son2.play()
+b1.when_pressed = launch_sound1
+b2.when_pressed = launch_sound2
+pause()
+</code>
+**Même chose en plus souple**
+<code java>
+from gpiozero import LED, Button
+from signal import pause
+import pygame
+button1 = Button(2)
+button2 = Button(3)
+led = LED(17)
+pygame.mixer.init()
+monson1 =pygame.mixer.Sound('/usr/share/scratch/Media/Sounds/Electronic/Zoop.wav')
+monson2 =pygame.mixer.Sound('/usr/share/scratch/Media/Sounds/Electronic/Laser1.wav')
+# dictionnaire clé/valeur pour lister les sons
+sounds = {button1: monson1,
+          button2: monson2}
+def stateON(button):
+    sounds[button].play()
+    led.on()
+def stateOFF(button):
+    sounds[button].stop()
+    led.off()
+def btntest():
+    # parcours l'ensemble des clés du dictionnaire sounds
+    for button in sounds.keys():
+        # when_pressed envoie apr defaut le bouton en tant qu'argument de la fonction stateON / stateOFF
+        button.when_pressed = stateON
+        button.when_released = stateOFF
+btntest()
+pause()
+</code>
 ===== Entrée / Sortie =====
@@ Ligne 95: / Ligne 234: @@
 -----
 FIXME

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