implemented microSD mount/unmount functions

README.md

@@ -77,6 +77,8 @@ Exports the following functions:
 - `lock_rootfs()`: make the device root filesystem read-only (does nothing on desktop)
 - `stat(path)` (aka `du(path)`): alias to `os.stat` but returning the stats as a dictionary
 - `statvfs(path)` (aka `df(path)`): alias to `os.statvfs` but returning the stats as a dictionary
+- `mount_sd(path='/sd', readonly=False)`: mount the inserted microSD card (T-Deck only, must be FAT32)
+- `umount_sd(path='/sd')`: unmount the inserted microSD card (T-Deck only)
 
 The following `deck.fs` functions are direct aliases to the corresponding `os` call counterparts:
 

deck/fs.py

@@ -5,7 +5,7 @@ import os
 
 MCU_STORAGE = False
 try:
-  import storage
+  import storage, sdcardio, board
   MCU_STORAGE = True
 except:
   pass
@@ -18,6 +18,28 @@ def lock_rootfs():
   if MCU_STORAGE:
     storage.remount("/", readonly=True)
 
+def mount_sd(path='/sd', readonly=False):
+  sd_ok = True
+  if MCU_STORAGE:
+    try:
+      sdcard = sdcardio.SDCard(board.SPI(), board.SDCARD_CS)
+      vfs = storage.VfsFat(sdcard)
+      storage.mount(vfs, path, readonly=readonly)
+      sd_ok = True
+    except:
+      sd_ok = False
+  return sd_ok
+
+def umount_sd(path='/sd'):
+  sd_ok = True
+  if MCU_STORAGE:
+    try:
+      storage.umount(path)
+      sd_ok = True
+    except:
+      sd_ok = False
+  return sd_ok
+
 # TODO: switch to buffered copying to avoid RAM overflow
 def copy(p1, p2):
   with open(p1, 'rb') as f1:

tdeckboot.py

@@ -3,10 +3,11 @@
 # Usage: from tdeckboot import *
 # Created by Luxferre in 2025, released into public domain
 
-from deck.fs import unlock_rootfs, lock_rootfs, env, rnd, sync
-from deck.fs import du, df, sep, pwd, ls, md, cd, rd, rm, mv, cp
+from deck.fs import unlock_rootfs, lock_rootfs, mount_sd, umount_sd, env, rnd
+from deck.fs import du, df, sep, pwd, ls, md, cd, rd, rm, mv, cp, sync
 from deck.input import input, input_multi
 from deck.pager import print_paged, term_size
+# from deck.hwinfo import
 from app.ed import edit, view
 try:
   from deck import net