Metro RP2040 CircuitPython code.

Adafruit_Metro_RP2040/Capacitive_Touch/One_Pin/code.py

@@ -0,0 +1,15 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython Capacitive Touch Pin Example - Print to the serial console when one pin is touched.
+"""
+import time
+import board
+import touchio
+
+touch = touchio.TouchIn(board.A1)
+
+while True:
+    if touch.value:
+        print("Pin touched!")
+    time.sleep(0.1)

Adafruit_Metro_RP2040/Capacitive_Touch/Two_Pins/code.py

@@ -0,0 +1,18 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython Capacitive Two Touch Pin Example - Print to the serial console when a pin is touched.
+"""
+import time
+import board
+import touchio
+
+touch_one = touchio.TouchIn(board.A1)
+touch_two = touchio.TouchIn(board.A2)
+
+while True:
+    if touch_one.value:
+        print("Pin one touched!")
+    if touch_two.value:
+        print("Pin two touched!")
+    time.sleep(0.1)

Adafruit_Metro_RP2040/Digital_Input/code.py

@@ -0,0 +1,19 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython Digital Input Example - Blinking an LED using a button switch.
+"""
+import board
+import digitalio
+
+led = digitalio.DigitalInOut(board.LED)
+led.direction = digitalio.Direction.OUTPUT
+
+button = digitalio.DigitalInOut(board.A1)
+button.switch_to_input(pull=digitalio.Pull.UP)
+
+while True:
+    if not button.value:
+        led.value = True
+    else:
+        led.value = False

Adafruit_Metro_RP2040/I2S/Tone/code.py

@@ -0,0 +1,29 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython I2S Tone playback example.
+Plays a tone for one second on, one
+second off, in a loop.
+"""
+import time
+import array
+import math
+import audiocore
+import board
+import audiobusio
+
+audio = audiobusio.I2SOut(board.A0, board.A1, board.A2)
+
+tone_volume = 0.1  # Increase this to increase the volume of the tone.
+frequency = 440  # Set this to the Hz of the tone you want to generate.
+length = 8000 // frequency
+sine_wave = array.array("h", [0] * length)
+for i in range(length):
+    sine_wave[i] = int((math.sin(math.pi * 2 * i / length)) * tone_volume * (2 ** 15 - 1))
+sine_wave_sample = audiocore.RawSample(sine_wave)
+
+while True:
+    audio.play(sine_wave_sample, loop=True)
+    time.sleep(1)
+    audio.stop()
+    time.sleep(1)

Adafruit_Metro_RP2040/I2S/WAV/code.py

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython I2S WAV file playback.
+Plays a WAV file once.
+"""
+import audiocore
+import board
+import audiobusio
+
+audio = audiobusio.I2SOut(board.A0, board.A1, board.A2)
+
+with open("StreetChicken.wav", "rb") as wave_file:
+    wav = audiocore.WaveFile(wave_file)
+
+    print("Playing wav file!")
+    audio.play(wav)
+    while audio.playing:
+        pass
+
+print("Done!")

Adafruit_Metro_RP2040/PWM_Audio/Tone/code.py

@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython PWM Audio Out tone example
+Plays a tone for one second on, one
+second off, in a loop.
+"""
+import time
+import array
+import math
+import board
+from audiocore import RawSample
+from audiopwmio import PWMAudioOut as AudioOut
+
+audio = AudioOut(board.A0)
+
+tone_volume = 0.1  # Increase this to increase the volume of the tone.
+frequency = 440  # Set this to the Hz of the tone you want to generate.
+length = 8000 // frequency
+sine_wave = array.array("H", [0] * length)
+for i in range(length):
+    sine_wave[i] = int((1 + math.sin(math.pi * 2 * i / length)) * tone_volume * (2 ** 15 - 1))
+
+sine_wave_sample = RawSample(sine_wave)
+
+while True:
+    audio.play(sine_wave_sample, loop=True)
+    time.sleep(1)
+    audio.stop()
+    time.sleep(1)

Adafruit_Metro_RP2040/PWM_Audio/WAV/code.py

@@ -0,0 +1,22 @@
+# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython PWM Audio Out WAV example
+Play a WAV file once.
+"""
+import board
+from audiocore import WaveFile
+from audiopwmio import PWMAudioOut as AudioOut
+
+audio = AudioOut(board.A0)
+
+with open("StreetChicken.wav", "rb") as wave_file:
+    wave = WaveFile(wave_file)
+    print("Playing wav file!")
+    audio.play(wave)
+    while audio.playing:
+        pass
+
+print("Done!")

Adafruit_Metro_RP2040/Storage/boot.py

@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython Essentials Storage CP Filesystem boot.py file
+"""
+import board
+import digitalio
+import storage
+
+pin = digitalio.DigitalInOut(board.A0)
+pin.switch_to_input(pull=digitalio.Pull.UP)
+
+# If the pin is connected to ground, the filesystem is writable by CircuitPython
+storage.remount("/", readonly=pin.value)

Adafruit_Metro_RP2040/Storage/code.py

@@ -0,0 +1,39 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython Essentials Storage CP Filesystem code.py file
+
+For use with boards with a built-in red LED.
+"""
+import time
+import board
+import digitalio
+import microcontroller
+
+led = digitalio.DigitalInOut(board.LED)
+led.switch_to_output()
+
+try:
+    with open("/temperature.txt", "a") as temp_log:
+        while True:
+            # The microcontroller temperature in Celsius. Include the
+            # math to do the C to F conversion here, if desired.
+            temperature = microcontroller.cpu.temperature
+
+            # Write the temperature to the temperature.txt file every 10 seconds.
+            temp_log.write('{0:.2f}\n'.format(temperature))
+            temp_log.flush()
+
+            # Blink the LED on every write...
+            led.value = True
+            time.sleep(1)  # ...for one second.
+            led.value = False  # Then turn it off...
+            time.sleep(9)  # ...for the other 9 seconds.
+
+except OSError as e:  # When the filesystem is NOT writable by CircuitPython...
+    delay = 0.5  # ...blink the LED every half second.
+    if e.args[0] == 28:  # If the file system is full...
+        delay = 0.15  # ...blink the LED every 0.15 seconds!
+    while True:
+        led.value = not led.value
+        time.sleep(delay)

Adafruit_Metro_RP2040/asyncio/code.py

@@ -0,0 +1,80 @@
+# SPDX-FileCopyrightText: Copyright (c) 2022 Dan Halbert for Adafruit Industries
+# SPDX-FileCopyrightText: Copyright (c) 2022 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython asyncio example for two NeoPixel rings and one button.
+"""
+import asyncio
+import board
+import neopixel
+import keypad
+from rainbowio import colorwheel
+
+button_pin = board.A0  # The pin the button is connected to.
+num_pixels = 16  # The number of NeoPixels on a single ring.
+brightness = 0.2  # The LED brightness.
+
+# Set up NeoPixel rings.
+ring_one = neopixel.NeoPixel(board.A1, num_pixels, brightness=brightness, auto_write=False)
+ring_two = neopixel.NeoPixel(board.A2, num_pixels, brightness=brightness, auto_write=False)
+
+
+class AnimationControls:
+    """The controls to allow you to vary the rainbow and blink animations."""
+    def __init__(self):
+        self.reverse = False
+        self.wait = 0.0
+        self.delay = 0.5
+
+
+async def rainbow_cycle(controls):
+    """Rainbow cycle animation on ring one."""
+    while True:
+        for j in range(255, -1, -1) if controls.reverse else range(0, 256, 1):
+            for i in range(num_pixels):
+                rc_index = (i * 256 // num_pixels) + j
+                ring_one[i] = colorwheel(rc_index & 255)
+            ring_one.show()
+            await asyncio.sleep(controls.wait)
+
+
+async def blink(controls):
+    """Blink animation on ring two."""
+    while True:
+        ring_two.fill((0, 0, 255))
+        ring_two.show()
+        await asyncio.sleep(controls.delay)
+        ring_two.fill((0, 0, 0))
+        ring_two.show()
+        await asyncio.sleep(controls.delay)
+        await asyncio.sleep(controls.wait)
+
+
+async def monitor_button(button, controls):
+    """Monitor button that reverses rainbow direction and changes blink speed.
+    Assume button is active low.
+    """
+    with keypad.Keys((button,), value_when_pressed=False, pull=True) as key:
+        while True:
+            key_event = key.events.get()
+            if key_event:
+                if key_event.pressed:
+                    controls.reverse = True
+                    controls.delay = 0.1
+                elif key_event.released:
+                    controls.reverse = False
+                    controls.delay = 0.5
+            await asyncio.sleep(0)
+
+
+async def main():
+    animation_controls = AnimationControls()
+    button_task = asyncio.create_task(monitor_button(button_pin, animation_controls))
+    animation_task = asyncio.create_task(rainbow_cycle(animation_controls))
+    blink_task = asyncio.create_task(blink(animation_controls))
+
+    # This will run forever, because no tasks ever finish.
+    await asyncio.gather(button_task, animation_task, blink_task)
+
+asyncio.run(main())