esp8266: Add Python modules for initial configuration.
Main entry point is _boot.py which checks whether FAT FS in flash mountable,
and if so, mounts it. Otherwise, it checks if flash is empty, and if so,
performs initial module setup: makes FAT FS, configures default AP name,
etc. As a last option, if flash is not empty, and could not be mounted,
it means filesystem corruption, and warning message with instructions is
printed in an infinite loop.
2016-04-11 17:37:04 -04:00
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import esp
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class FlashBdev:
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SEC_SIZE = 4096
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2016-04-17 18:23:04 -04:00
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START_SEC = 0x89000 // SEC_SIZE
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NUM_BLK = 0x73
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esp8266: Add Python modules for initial configuration.
Main entry point is _boot.py which checks whether FAT FS in flash mountable,
and if so, mounts it. Otherwise, it checks if flash is empty, and if so,
performs initial module setup: makes FAT FS, configures default AP name,
etc. As a last option, if flash is not empty, and could not be mounted,
it means filesystem corruption, and warning message with instructions is
printed in an infinite loop.
2016-04-11 17:37:04 -04:00
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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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2016-04-18 10:14:00 -04:00
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if esp.flash_size() < 1024*1024:
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bdev = None
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else:
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bdev = FlashBdev()
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