Matthias Blankertz
e9bd4f72b6
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Add utils.MBRPartition to implement basic partitioned device support. Try to mount partition 1 of SDCard first, if that fails, try to mount entire device as FAT file system. Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
# SPDX-License-Identifier: MIT
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# Copyright (c) 2025 Matthias Blankertz <matthias@blankertz.org>
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import os
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from . import MBRPartition
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from rp2_sd import SDCard
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class SDContext:
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def __init__(self, mosi, miso, sck, ss, baudrate):
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self.mosi = mosi
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self.miso = miso
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self.sck = sck
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self.ss = ss
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self.baudrate = baudrate
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def __enter__(self):
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self.sdcard = SDCard(self.mosi, self.miso, self.sck, self.ss, self.baudrate)
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# Try first partition
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try:
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self.part = MBRPartition(self.sdcard, 0)
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os.mount(self.part, '/sd')
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return self
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except Exception:
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print("Failed to mount SDCard partition, trying whole device...")
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# Try whole device
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try:
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os.mount(self.sdcard, '/sd')
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return self
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except Exception as ex:
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self.sdcard.deinit()
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raise RuntimeError("Could not mount SD card") from ex
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def __exit__(self, exc_type, exc_value, traceback):
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try:
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os.umount('/sd')
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finally:
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self.sdcard.deinit()
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