CircuitPythonMetro2350 Examples

Metro_RP2350_Examples/CircuitPython_I2S_Tone/code.py

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+# 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)

Metro_RP2350_Examples/CircuitPython_I2S_Wav/code.py

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+# 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!")

Metro_RP2350_Examples/CircuitPython_PSRAM/code.py

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+# SPDX-FileCopyrightText: 2024 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+import gc
+
+print(gc.mem_free())

Metro_RP2350_Examples/CircuitPython_PWM_Audio_Multi_MP3/code.py

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+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython multiple MP3 playback example.
+Plays two MP3 files consecutively, once time each.
+"""
+
+import board
+import audiomp3
+import audiopwmio
+
+audio = audiopwmio.PWMAudioOut(board.A0)
+
+mp3files = ["slow.mp3", "happy.mp3"]
+
+with open(mp3files[0], "rb") as mp3:
+    decoder = audiomp3.MP3Decoder(mp3)
+
+    for filename in mp3files:
+        with open(filename, "rb") as decoder.file:
+            audio.play(decoder)
+            print("Playing:", filename)
+            while audio.playing:
+                pass
+
+print("Done playing!")

Metro_RP2350_Examples/CircuitPython_PWM_Audio_Single_MP3/code.py

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+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython single MP3 playback example.
+Plays a single MP3 once.
+"""
+import board
+import audiomp3
+import audiopwmio
+
+audio = audiopwmio.PWMAudioOut(board.A0)
+
+with open("slow.mp3", "rb") as mp3_file:
+    decoder = audiomp3.MP3Decoder(mp3_file)
+
+    audio.play(decoder)
+    while audio.playing:
+        pass
+
+print("Done playing!")

Metro_RP2350_Examples/CircuitPython_SDCard_ListFiles/code.py

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+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython Essentials SD Card Read Demo
+
+"""
+
+import os
+import digitalio
+import busio
+import board
+import storage
+import adafruit_sdcard
+
+# The SD_CS pin is the chip select line.
+SD_CS = board.SD_CS
+
+# Connect to the card and mount the filesystem.
+cs = digitalio.DigitalInOut(SD_CS)
+sdcard = adafruit_sdcard.SDCard(busio.SPI(board.SD_SCK, board.SD_MOSI, board.SD_MISO), cs)
+vfs = storage.VfsFat(sdcard)
+storage.mount(vfs, "/sd")
+
+# Use the filesystem as normal! Our files are under /sd
+
+# This helper function will print the contents of the SD
+def print_directory(path, tabs=0):
+    for file in os.listdir(path):
+        stats = os.stat(path + "/" + file)
+        filesize = stats[6]
+        isdir = stats[0] & 0x4000
+
+        if filesize < 1000:
+            sizestr = str(filesize) + " bytes"
+        elif filesize < 1000000:
+            sizestr = "%0.1f KB" % (filesize / 1000)
+        else:
+            sizestr = "%0.1f MB" % (filesize / 1000000)
+
+        prettyprintname = ""
+        for _ in range(tabs):
+            prettyprintname += "   "
+        prettyprintname += file
+        if isdir:
+            prettyprintname += "/"
+        print("{0:<40} Size: {1:>10}".format(prettyprintname, sizestr))
+
+        # recursively print directory contents
+        if isdir:
+            print_directory(path + "/" + file, tabs + 1)
+
+
+print("Files on filesystem:")
+print("====================")
+print_directory("/sd")

Metro_RP2350_Examples/CircuitPython_SDCard_Write/code.py

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+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython Essentials SD Card Write Demo
+REMOVE THIS LINE AND ALL BELOW IT BEFORE SUBMITTING TO LEARN
+Update CHIP_SELECT_PIN to match the CS pin on your board.
+
+For example, for the Metro ESP32-S3, you would use: board.SD_CS.
+"""
+
+import time
+import adafruit_sdcard
+import board
+import busio
+import digitalio
+import microcontroller
+import storage
+
+# The SD_CS pin is the chip select line.
+SD_CS = board.SD_CS
+
+# Connect to the card and mount the filesystem.
+cs = digitalio.DigitalInOut(SD_CS)
+sdcard = adafruit_sdcard.SDCard(busio.SPI(board.SD_SCK, board.SD_MOSI, board.SD_MISO), cs)
+vfs = storage.VfsFat(sdcard)
+storage.mount(vfs, "/sd")
+
+# Use the filesystem as normal! Our files are under /sd
+
+print("Logging temperature to filesystem")
+# append to the file!
+while True:
+    # open file for append
+    with open("/sd/temperature.txt", "a") as f:
+        t = microcontroller.cpu.temperature
+        print("Temperature = %0.1f" % t)
+        f.write("%0.1f\n" % t)
+    # file is saved
+    time.sleep(1)