Merge pull request #3061 from adafruit/metro-rp2350-CP10x-SD

Metro RP2350 demo code for CircuitPython 10.x SD card list and write. The 9.x examples are not compatible.

Author: mikeysklar

Metro_RP2350_Examples/CircuitPython_SDCard_ListFiles/code-cp10x.py

@@ -0,0 +1,37 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython 10.x SD Card Directory Listing Demo
+Assumes the SD card is auto-mounted at /sd by the runtime.
+"""
+
+import os
+
+def print_directory(path, tabs=0):
+    for name in os.listdir(path):
+        full_path = f"{path}/{name}"
+        stats     = os.stat(full_path)
+        filesize  = stats[6]
+        isdir     = bool(stats[0] & 0x4000)
+
+        # human-readable size
+        if   filesize < 1_000:
+            sizestr = f"{filesize} bytes"
+        elif filesize < 1_000_000:
+            sizestr = f"{filesize/1_000:.1f} KB"
+        else:
+            sizestr = f"{filesize/1_000_000:.1f} MB"
+
+        indent       = "   " * tabs
+        display_name = indent + name + ("/" if isdir else "")
+
+        # <40 pads or truncates to 40 chars, then we append the size
+        print(f"{display_name:<40} Size: {sizestr}")
+
+        if isdir:
+            print_directory(full_path, tabs + 1)
+
+print("Files on /sd:")
+print("====================")
+print_directory("/sd")

Metro_RP2350_Examples/CircuitPython_SDCard_ListFiles/code.py

@@ -3,7 +3,7 @@
 
 """
 CircuitPython Essentials SD Card Read Demo
-
+* Not compatible with CircuitPython 10.x
 """
 
 import os

Metro_RP2350_Examples/CircuitPython_SDCard_Write/code-cp10x.py

@@ -0,0 +1,23 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+CircuitPython 10.x SD Write Demo
+  • Assumes /sd is auto-mounted by the runtime
+  • Just open and append — no mount or SD driver code needed
+  • Not compatible with CircuitPython 9.x
+  • Uses SDIO
+"""
+
+import time
+import microcontroller
+
+print("Logging temperature to /sd/temperature.txt")
+
+while True:
+    t = microcontroller.cpu.temperature
+    print("T = %0.1f °C" % t)
+    with open("/sd/temperature.txt", "a") as f:
+        f.write("%0.1f\n" % t)
+    time.sleep(1)

Metro_RP2350_Examples/CircuitPython_SDCard_Write/code.py

@@ -8,6 +8,8 @@
 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.
+
+This code stops working with CircuitPython 10.x which automounts /sd
 """
 
 import time