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e343bea6e7
This effectively reverts the change that introduced this new constant. The reason is so that users do not need to rebuild the filesystem on their modules when upgrading the firmware. Users can change RESERVED_SECS by hand if they need the feature, and in future firmware it may default to a non-zero value.
36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
import esp
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class FlashBdev:
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SEC_SIZE = 4096
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RESERVED_SECS = 0
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START_SEC = esp.flash_user_start() // SEC_SIZE + RESERVED_SECS
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NUM_BLK = 0x6b - RESERVED_SECS
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def __init__(self, blocks=NUM_BLK):
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self.blocks = blocks
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def readblocks(self, n, buf):
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#print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
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esp.flash_read((n + self.START_SEC) * self.SEC_SIZE, buf)
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def writeblocks(self, n, buf):
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#print("writeblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
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#assert len(buf) <= self.SEC_SIZE, len(buf)
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esp.flash_erase(n + self.START_SEC)
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esp.flash_write((n + self.START_SEC) * self.SEC_SIZE, buf)
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def ioctl(self, op, arg):
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#print("ioctl(%d, %r)" % (op, arg))
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if op == 4: # BP_IOCTL_SEC_COUNT
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return self.blocks
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if op == 5: # BP_IOCTL_SEC_SIZE
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return self.SEC_SIZE
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size = esp.flash_size()
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if size < 1024*1024:
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bdev = None
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else:
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# 20K at the flash end is reserved for SDK params storage
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bdev = FlashBdev((size - 20480) // FlashBdev.SEC_SIZE - FlashBdev.START_SEC)
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