Adding M7 SD code.

Adafruit_Metro_M7_SD/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.D10, board.D9, board.D12)
+
+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_M7_SD/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.D10, board.D9, board.D12)
+
+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_M7_SD/PWM_Audio/Tone/code.py

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+# 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.A1)
+
+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_M7_SD/PWM_Audio/WAV/code.py

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+# 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.A1)
+
+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_M7_SD/SD_Card/SD_Read/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 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(board.SPI(), 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")

Adafruit_Metro_M7_SD/SD_Card/SD_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
+"""
+
+import time
+import adafruit_sdcard
+import board
+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(board.SPI(), 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)

Adafruit_Metro_M7_SD/digital_input/code.py

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+# 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.A0)
+button.switch_to_input(pull=digitalio.Pull.UP)
+
+while True:
+    if not button.value:
+        led.value = True
+    else:
+        led.value = False