kopia lustrzana https://github.com/peterhinch/micropython_eeprom
99 wiersze
2.3 KiB
Python
99 wiersze
2.3 KiB
Python
# wemos_flash.py Test flash chips with ESP8266 host
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2020 Peter Hinch
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import uos
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from machine import SPI, Pin
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from flash_spi import FLASH
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cspins = (Pin(5, Pin.OUT, value=1), Pin(14, Pin.OUT, value=1))
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spi = SPI(-1, baudrate=20_000_000, sck=Pin(4), miso=Pin(0), mosi=Pin(2))
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def get_flash():
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flash = FLASH(spi, cspins)
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print("Instantiated Flash")
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return flash
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directory = "/fl_ext"
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a = bytearray(range(256)) # Data to write
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b = bytearray(256) # Data to read back
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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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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 flash_test(format=False):
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eep = get_flash()
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if format:
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uos.VfsLfs2.mkfs(eep)
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try:
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uos.mount(eep, "/fl_ext")
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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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msg = """Run wemos_flash.flash_test(True) to format new array, otherwise
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wemos_flash.flash_test()
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Runs prolonged test of filesystem."""
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print(msg)
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