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--- materiel:rpi:gpio:accueil [2016/12/05 18:48]
resonance créée
+++ materiel:rpi:gpio:accueil [2018/05/15 16:16] (Version actuelle)
resonance
@@ Ligne 1: / Ligne 1: @@
 ====== RPI - GPIO ======
+Utilisations : entrées, sorties, ...
-===== GPIO =====
+===== Ligne de commande =====
-{{youtube>q_NvDTZIaS4?medium}}
+ 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:
+  * LED (also PWM LED allowing change of brightness)
+  * RGB LED
+  * Buzzer
+  * Motor
+  * Button
+  * Motion Sensor
+  * Light Sensor
+  * Analogue-to-Digital converters MCP3004 and MCP3008
+  * Robot
+[[https://www.youtube.com/watch?v=q_NvDTZIaS4|Vidéo d'introduction]]
+**Ressources**
+  * La documentation de [[https://gpiozero.readthedocs.io/en/v1.3.1/recipes.html#button|gpiozero]]
+  * [[https://www.raspberrypi.org/blog/gpio-zero-a-friendly-python-api-for-physical-computing/|gpiozero - tutorial]]
+  * Article [[materiel:rpi:pwm:accueil|RPI - PWM]]
+=====Pins=====
+<WRAP group>
+<WRAP half column>{{:materiel:rpi:gpio:pi3_gpio.png?500|}} **RPI 3**</WRAP>
+<WRAP half column>{{:materiel:rpi:raspberry_pins.png|}} **RPI B+**</WRAP>
+</WRAP>
+===== Sorties =====
+<WRAP group>
+<WRAP half column>
+{{:materiel:rpi:gpio:led-gpio17-500x297.png|}}
+</WRAP>
+<WRAP half column>
+<code python>
+from gpiozero import LED
+from time import sleep
+led = LED(17)
+while True:
+    led.on()
+    sleep(1)
+    led.off()
+    sleep(1)
+</code>
+</WRAP>
+</WRAP>
+===== Entreés =====
+<WRAP group>
+<WRAP half column>
+{{:materiel:rpi:gpio:rpi-button.png|}}
+</WRAP>
+<WRAP half column>
+<code python>
+from gpiozero import Button
+mybutton = Button(2)
+mybutton.wait_for_press()
+print('You pushed me')
+</code>
+</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 =====
+<WRAP group>
+<WRAP half column>
+{{:materiel:rpi:gpio:rpi-gpio-button-led.png|}}
+</WRAP>
+<WRAP half column>
+<code python>
+from gpiozero import LED, Button
+from signal import pause
+led = LED(17)
+button = Button(2)
+button.when_pressed = led.on
+button.when_released = led.off
+pause()
+<code>
+</WRAP>
+</WRAP>
+-----
+FIXME
-==== Pins Raspberry ====
-  * http://raspi.tv/download/rpigpio.txt
-{{:materiel:rpi:gpio-control-example-large.png?500|}}
-==== Pins Raspberry B+ ====
-{{:materiel:rpi:raspberry_pins.png|}}
 ==== Installation ====

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