kopia lustrzana https://github.com/peterhinch/micropython_eeprom
78 wiersze
2.0 KiB
Python
78 wiersze
2.0 KiB
Python
# littlefs_test.py Extended filesystem test of FRAM devices
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# Create multiple binary files of varying length and verify that they can be
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# read back correctly. Rewrite files with new lengths then check that all files
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# are OK.
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import uos
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from machine import SPI, Pin
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from fram_spi_test import get_fram
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directory = '/fram'
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a = bytearray(range(256))
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b = bytearray(256)
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files = {} # n:length
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errors = 0
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def fname(n):
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return '{}/{:05d}'.format(directory, n + 1) # Names start 00001
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def fcreate(n): # Create a binary file of random length
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length = int.from_bytes(uos.urandom(2), 'little') + 1 # 1-65536 bytes
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length &= 0x3ff # 1-1023 for FRAM
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linit = length
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with open(fname(n), 'wb') as f:
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while(length):
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nw = min(length, 256)
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f.write(a[:nw])
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length -= nw
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files[n] = length
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return linit
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def fcheck(n):
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length = files[n]
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with open(fname(n), 'rb') as f:
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while(length):
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nr = f.readinto(b)
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if not nr:
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return False
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if a[:nr] != b[:nr]:
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return False
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length -= nr
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return True
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def check_all():
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global errors
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for n in files:
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if fcheck(n):
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print('File {:d} OK'.format(n))
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else:
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print('Error in file', n)
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errors += 1
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print('Total errors:', errors)
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def remove_all():
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for n in files:
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uos.remove(fname(n))
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def main():
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fram = get_fram()
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try:
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uos.mount(fram, directory)
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except OSError: # Already mounted
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pass
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for n in range(128):
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length = fcreate(n)
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print('Created', n, length)
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print('Created files', files)
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check_all()
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for _ in range(100):
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for x in range(5): # Rewrite 5 files with new lengths
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n = int.from_bytes(uos.urandom(1), 'little') & 0x7f
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length = fcreate(n)
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print('Rewrote', n, length)
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check_all()
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remove_all()
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print('main() to run littlefs test. Filesystem must exist.')
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