kopia lustrzana https://github.com/peterhinch/micropython_eeprom
137 wiersze
4.0 KiB
Python
137 wiersze
4.0 KiB
Python
# spiram_ test.py MicroPython test program for Adafruit SPIRAM device
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# Adafruit https://www.adafruit.com/product/4677
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2021 Peter Hinch
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import os
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import time
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from machine import SPI, Pin
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from spiram import SPIRAM
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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 RAM array. Adapt for platforms other than Pyboard.
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def get_spiram():
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if os.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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ram = SPIRAM(SPI(2, baudrate=25_000_000), cspins)
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print("Instantiated RAM")
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return ram
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# Dumb file copy utility to help with managing FRAM 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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dest = "".join((dest, source.split("/")[-1])) # cp /sd/file /ram/
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with open(source, "rb") as infile: # Caller should handle any OSError
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with open(dest, "wb") as outfile: # e.g file not found
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while True:
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buf = infile.read(100)
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outfile.write(buf)
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if len(buf) < 100:
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break
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# ***** TEST OF DRIVER *****
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def _testblock(eep, bs):
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d0 = b"this >"
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d1 = b"<is the boundary"
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d2 = d0 + d1
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garbage = b"xxxxxxxxxxxxxxxxxxx"
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start = bs - len(d0)
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end = start + len(garbage)
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eep[start:end] = garbage
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res = eep[start:end]
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if res != garbage:
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return "Block test fail 1:" + str(list(res))
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end = start + len(d0)
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eep[start:end] = d0
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end = start + len(garbage)
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res = eep[start:end]
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if res != b"this >xxxxxxxxxxxxx":
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return "Block test fail 2:" + str(list(res))
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start = bs
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end = bs + len(d1)
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eep[start:end] = d1
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start = bs - len(d0)
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end = start + len(d2)
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res = eep[start:end]
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if res != d2:
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return "Block test fail 3:" + str(list(res))
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def test():
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ram = get_spiram()
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sa = 1000
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for v in range(256):
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ram[sa + v] = v
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for v in range(256):
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if ram[sa + v] != v:
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print(
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"Fail at address {} data {} should be {}".format(sa + v, ram[sa + v], v)
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)
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break
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else:
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print("Test of byte addressing passed")
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data = os.urandom(30)
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sa = 2000
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ram[sa : sa + 30] = data
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if ram[sa : sa + 30] == data:
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print("Test of slice readback passed")
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# On SPIRAM the only meaningful block test is on a chip boundary.
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block = ram._c_bytes
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if ram._a_bytes > block:
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res = _testblock(ram, block)
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if res is None:
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print("Test chip boundary {} passed".format(block))
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else:
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print("Test chip boundary {} fail".format(block))
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print(res)
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else:
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print("Test chip boundary skipped: only one chip!")
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# ***** TEST OF FILESYSTEM MOUNT *****
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def fstest():
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ram = get_spiram()
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os.VfsLfs2.mkfs(ram) # Format littlefs
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try:
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os.mount(ram, "/ram")
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except OSError: # Already mounted
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pass
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print('Contents of "/": {}'.format(os.listdir("/")))
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print('Contents of "/ram": {}'.format(os.listdir("/ram")))
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print(os.statvfs("/ram"))
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def cptest():
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ram = get_spiram()
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if "ram" in os.listdir("/"):
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print("Device already mounted.")
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else:
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os.VfsLfs2.mkfs(ram) # Format littlefs
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os.mount(ram, "/ram")
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print("Formatted and mounted device.")
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cp("/sd/spiram_test.py", "/ram/")
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cp("/sd/spiram.py", "/ram/")
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print('Contents of "/ram": {}'.format(os.listdir("/ram")))
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print(os.statvfs("/ram"))
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# ***** TEST OF HARDWARE *****
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def full_test():
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bsize = 2048
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ram = get_spiram()
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page = 0
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for sa in range(0, len(ram), bsize):
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data = os.urandom(bsize)
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ram[sa : sa + bsize] = data
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if ram[sa : sa + bsize] == data:
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print("Page {} passed".format(page))
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else:
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print("Page {} readback failed.".format(page))
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page += 1
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