kopia lustrzana https://github.com/peterhinch/micropython_eeprom
EEPROM: SPI and I2C full_test now more rigorous.
Peter Hinch
rodzic
3b2e2530ef
commit
5861e93f48
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@ -5,20 +5,42 @@
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import uos
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import time
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from machine import I2C, Pin
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from machine import I2C, Pin, SoftI2C
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from eeprom_i2c import EEPROM, T24C512
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# Return an EEPROM array. Adapt for platforms other than Pyboard or chips
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# smaller than 64KiB.
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def get_eep():
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# Special code for Pyboard D: enable 3.3V output
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if uos.uname().machine.split(" ")[0][:4] == "PYBD":
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Pin.board.EN_3V3.value(1)
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time.sleep(0.1) # Allow decouplers to charge
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eep = EEPROM(I2C(2), T24C512)
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if uos.uname().sysname == "esp8266":
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eep = EEPROM(SoftI2C(scl=Pin(13, Pin.OPEN_DRAIN), sda=Pin(12, Pin.OPEN_DRAIN)), T24C512)
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else:
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eep = EEPROM(I2C(2), T24C512) # Pyboard D or 1.x
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print("Instantiated EEPROM")
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return eep
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# Yield pseudorandom bytes (random module not available on all ports)
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def psrand8(x=0x3FBA2):
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while True:
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x ^= (x & 0x1FFFF) << 13
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x ^= x >> 17
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x ^= (x & 0x1FFFFFF) << 5
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yield x & 0xFF
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# Given a source of pseudorandom bytes yield pseudorandom 256 byte buffer.
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def psrand256(rand, ba=bytearray(256)):
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while True:
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for z in range(256):
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ba[z] = next(rand)
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yield ba
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# Dumb file copy utility to help with managing EEPROM contents at the REPL.
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def cp(source, dest):
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if dest.endswith("/"): # minimal way to allow
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@ -144,27 +166,38 @@ def cptest(eep=None): # Assumes pre-existing filesystem of either type
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print("Fail mounting device. Have you formatted it?")
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return
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print("Mounted device.")
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cp(__file__, "/eeprom/")
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# We may have the source file or a precompiled binary (*.mpy)
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cp(__file__.replace("eep", "eeprom"), "/eeprom/")
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print('Contents of "/eeprom": {}'.format(uos.listdir("/eeprom")))
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print(uos.statvfs("/eeprom"))
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try:
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cp(__file__, "/eeprom/")
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# We may have the source file or a precompiled binary (*.mpy)
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cp(__file__.replace("eep", "eeprom"), "/eeprom/")
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print('Contents of "/eeprom": {}'.format(uos.listdir("/eeprom")))
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print(uos.statvfs("/eeprom"))
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except NameError:
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print("Test cannot be performed by this MicroPython port. Consider using upysh.")
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# ***** TEST OF HARDWARE *****
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def full_test(eep=None, block_size=256):
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# Write pseudorandom data to entire array, then read back. Fairly rigorous test.
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def full_test(eep=None):
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eep = eep if eep else get_eep()
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print(f"Testing with {block_size}byte blocks of random data...")
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block = 0
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for sa in range(0, len(eep), block_size):
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data = uos.urandom(block_size)
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eep[sa : sa + block_size] = data
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if eep[sa : sa + block_size] == data:
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print(f"Block {block} passed\r", end="")
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else:
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print(f"Block {block} readback failed.")
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block += 1
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print("Testing with 256 byte blocks of random data...")
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r = psrand8() # Instantiate random byte generator
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ps = psrand256(r) # Random 256 byte blocks
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for sa in range(0, len(eep), 256):
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ea = sa + 256
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eep[sa:ea] = next(ps)
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print(f"Address {sa}..{ea} written\r", end="")
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print()
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r = psrand8() # Instantiate new random byte generator with same seed
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ps = psrand256(r) # Random 256 byte blocks
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for sa in range(0, len(eep), 256):
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ea = sa + 256
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if eep[sa:ea] == next(ps):
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print(f"Address {sa}..{ea} readback passed\r", end="")
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else:
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print(f"Address {sa}..{ea} readback failed.")
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print()
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def help():
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st = """Available commands:
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@ -180,4 +213,5 @@ def help():
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"""
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print(st)
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help()
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@ -1,29 +1,59 @@
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# eep_spi.py MicroPython test program for Microchip SPI EEPROM devices.
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2019-2022 Peter Hinch
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# Copyright (c) 2019-2024 Peter Hinch
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import uos
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import time
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from machine import SPI, Pin
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from machine import SPI, Pin, SoftSPI
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from eeprom_spi import EEPROM
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ESP8266 = uos.uname().sysname == "esp8266"
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# Add extra pins if using multiple chips
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cspins = (Pin(Pin.board.Y5, Pin.OUT, value=1), Pin(Pin.board.Y4, Pin.OUT, value=1))
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if ESP8266:
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cspins = (Pin(5, Pin.OUT, value=1), Pin(14, Pin.OUT, value=1))
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else:
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cspins = (Pin(Pin.board.Y5, Pin.OUT, value=1), Pin(Pin.board.Y4, Pin.OUT, value=1))
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# Return an EEPROM array. Adapt for platforms other than Pyboard.
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def get_eep(stm):
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if uos.uname().machine.split(" ")[0][:4] == "PYBD":
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Pin.board.EN_3V3.value(1)
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time.sleep(0.1) # Allow decouplers to charge
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if stm:
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eep = EEPROM(SPI(2, baudrate=5_000_000), cspins, 256)
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if ESP8266:
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spi = SoftSPI(baudrate=5_000_000, sck=Pin(4), miso=Pin(0), mosi=Pin(2))
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else: # Pyboard
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spi = SPI(2, baudrate=5_000_000)
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eep = EEPROM(spi, cspins, 256)
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else:
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eep = EEPROM(SPI(2, baudrate=20_000_000), cspins, 128)
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if ESP8266:
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spi = SoftSPI(baudrate=20_000_000, sck=Pin(4), miso=Pin(0), mosi=Pin(2))
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else:
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spi = SPI(2, baudrate=20_000_000)
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eep = EEPROM(spi, cspins, 128)
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print("Instantiated EEPROM")
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return eep
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# Yield pseudorandom bytes (random module not available on all ports)
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def psrand8(x=0x3FBA2):
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while True:
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x ^= (x & 0x1FFFF) << 13
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x ^= x >> 17
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x ^= (x & 0x1FFFFFF) << 5
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yield x & 0xFF
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# Given a source of pseudorandom bytes yield pseudorandom 256 byte buffer.
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def psrand256(rand, ba=bytearray(256)):
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while True:
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for z in range(256):
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ba[z] = next(rand)
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yield ba
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# Dumb file copy utility to help with managing EEPROM contents at the REPL.
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def cp(source, dest):
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if dest.endswith("/"): # minimal way to allow
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@ -149,27 +179,35 @@ def cptest(stm=False): # Assumes pre-existing filesystem of either type
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print("Fail mounting device. Have you formatted it?")
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return
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print("Mounted device.")
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cp(__file__, "/eeprom/")
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# We may have the source file or a precompiled binary (*.mpy)
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cp(__file__.replace("eep", "eeprom"), "/eeprom/")
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print('Contents of "/eeprom": {}'.format(uos.listdir("/eeprom")))
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print(uos.statvfs("/eeprom"))
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try:
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cp(__file__, "/eeprom/")
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# We may have the source file or a precompiled binary (*.mpy)
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cp(__file__.replace("eep", "eeprom"), "/eeprom/")
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print('Contents of "/eeprom": {}'.format(uos.listdir("/eeprom")))
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print(uos.statvfs("/eeprom"))
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except NameError:
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print("Test cannot be performed by this MicroPython port. Consider using upysh.")
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# ***** TEST OF HARDWARE *****
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def full_test(stm=False):
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eep = get_eep(stm)
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block = 0
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print("Testing with 256 byte blocks of random data...")
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r = psrand8() # Instantiate random byte generator
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ps = psrand256(r) # Random 256 byte blocks
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for sa in range(0, len(eep), 256):
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data = uos.urandom(256)
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eep[sa : sa + 256] = data
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got = eep[sa : sa + 256]
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if got == data:
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print(f"Block {block} passed\r", end="")
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ea = sa + 256
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eep[sa:ea] = next(ps)
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print(f"Address {sa}..{ea} written\r", end="")
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print()
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r = psrand8() # Instantiate new random byte generator with same seed
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ps = psrand256(r) # Random 256 byte blocks
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for sa in range(0, len(eep), 256):
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ea = sa + 256
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if eep[sa:ea] == next(ps):
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print(f"Address {sa}..{ea} readback passed\r", end="")
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else:
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print(f"Block {block} readback failed.")
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break
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block += 1
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print(f"Address {sa}..{ea} readback failed.")
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print()
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