kopia lustrzana https://github.com/peterhinch/micropython_eeprom
179 wiersze
5.4 KiB
Python
179 wiersze
5.4 KiB
Python
# flash_test.py MicroPython test program for Cypress SPI Flash devices.
|
|
|
|
# Released under the MIT License (MIT). See LICENSE.
|
|
# Copyright (c) 2019 Peter Hinch
|
|
|
|
import uos
|
|
import time
|
|
from machine import SPI, Pin
|
|
from flash_spi import FLASH
|
|
|
|
# **** ADAPT THIS FUNCTION ****
|
|
|
|
# Return an EEPROM array. Adapt for platforms other than Pyboard.
|
|
# May want to set chip size and baudrate.
|
|
def get_device():
|
|
if uos.uname().machine.split(" ")[0][:4] == "PYBD":
|
|
Pin.board.EN_3V3.value(1)
|
|
time.sleep(0.1)
|
|
# Adjust to suit number of chips and their wiring.
|
|
cspins = (Pin(Pin.board.Y5, Pin.OUT, value=1), Pin(Pin.board.Y4, Pin.OUT, value=1))
|
|
flash = FLASH(SPI(2, baudrate=20_000_000), cspins)
|
|
print("Instantiated Flash")
|
|
return flash
|
|
|
|
|
|
# **** END OF USER-ADAPTED CODE ****
|
|
|
|
# Dumb file copy utility to help with managing EEPROM contents at the REPL.
|
|
def cp(source, dest):
|
|
if dest.endswith("/"): # minimal way to allow
|
|
dest = "".join((dest, source.split("/")[-1])) # cp /sd/file /fl_ext/
|
|
with open(source, "rb") as infile: # Caller should handle any OSError
|
|
with open(dest, "wb") as outfile: # e.g file not found
|
|
while True:
|
|
buf = infile.read(100)
|
|
outfile.write(buf)
|
|
if len(buf) < 100:
|
|
break
|
|
|
|
|
|
# ***** TEST OF DRIVER *****
|
|
def _testblock(eep, bs):
|
|
d0 = b"this >"
|
|
d1 = b"<is the boundary"
|
|
d2 = d0 + d1
|
|
garbage = b"xxxxxxxxxxxxxxxxxxx"
|
|
start = bs - len(d0)
|
|
end = start + len(garbage)
|
|
eep[start:end] = garbage
|
|
res = eep[start:end]
|
|
if res != garbage:
|
|
return "Block test fail 1:" + str(list(res))
|
|
end = start + len(d0)
|
|
eep[start:end] = d0
|
|
end = start + len(garbage)
|
|
res = eep[start:end]
|
|
if res != b"this >xxxxxxxxxxxxx":
|
|
return "Block test fail 2:" + str(list(res))
|
|
start = bs
|
|
end = bs + len(d1)
|
|
eep[start:end] = d1
|
|
start = bs - len(d0)
|
|
end = start + len(d2)
|
|
res = eep[start:end]
|
|
if res != d2:
|
|
return "Block test fail 3:" + str(list(res))
|
|
|
|
|
|
def test():
|
|
eep = get_device()
|
|
sa = 1000
|
|
for v in range(256):
|
|
eep[sa + v] = v
|
|
for v in range(256):
|
|
if eep[sa + v] != v:
|
|
print(
|
|
"Fail at address {} data {} should be {}".format(sa + v, eep[sa + v], v)
|
|
)
|
|
break
|
|
else:
|
|
print("Test of byte addressing passed")
|
|
data = uos.urandom(30)
|
|
sa = 2000
|
|
eep[sa : sa + 30] = data
|
|
if eep[sa : sa + 30] == data:
|
|
print("Test of slice readback passed")
|
|
|
|
block = 256
|
|
res = _testblock(eep, block)
|
|
if res is None:
|
|
print("Test block boundary {} passed".format(block))
|
|
else:
|
|
print("Test block boundary {} fail".format(block))
|
|
print(res)
|
|
block = eep._c_bytes
|
|
if eep._a_bytes > block:
|
|
res = _testblock(eep, block)
|
|
if res is None:
|
|
print("Test chip boundary {} passed".format(block))
|
|
else:
|
|
print("Test chip boundary {} fail".format(block))
|
|
print(res)
|
|
else:
|
|
print("Test chip boundary skipped: only one chip!")
|
|
|
|
|
|
# ***** TEST OF FILESYSTEM MOUNT *****
|
|
def fstest(format=False):
|
|
eep = get_device()
|
|
# ***** CODE FOR LITTLEFS *****
|
|
if format:
|
|
uos.VfsLfs2.mkfs(eep)
|
|
try:
|
|
uos.mount(eep, "/fl_ext")
|
|
except OSError: # Already mounted
|
|
pass
|
|
print('Contents of "/": {}'.format(uos.listdir("/")))
|
|
print('Contents of "/fl_ext": {}'.format(uos.listdir("/fl_ext")))
|
|
print(uos.statvfs("/fl_ext"))
|
|
|
|
|
|
def cptest():
|
|
eep = get_device()
|
|
if "fl_ext" in uos.listdir("/"):
|
|
print("Device already mounted.")
|
|
else:
|
|
try:
|
|
uos.mount(eep, "/fl_ext")
|
|
except OSError:
|
|
print("Fail mounting device. Have you formatted it?")
|
|
return
|
|
print("Mounted device.")
|
|
cp("flash_test.py", "/fl_ext/")
|
|
cp("flash_spi.py", "/fl_ext/")
|
|
print('Contents of "/fl_ext": {}'.format(uos.listdir("/fl_ext")))
|
|
print(uos.statvfs("/fl_ext"))
|
|
|
|
|
|
# ***** TEST OF HARDWARE *****
|
|
def full_test(count=10):
|
|
flash = get_device()
|
|
for n in range(count):
|
|
data = uos.urandom(256)
|
|
while True:
|
|
sa = int.from_bytes(uos.urandom(4), "little") & 0x3FFFFFFF
|
|
if sa < (flash._a_bytes - 256):
|
|
break
|
|
flash[sa : sa + 256] = data
|
|
flash.sync()
|
|
got = flash[sa : sa + 256]
|
|
if got == data:
|
|
print("Pass {} address {:08x} passed".format(n, sa))
|
|
if sa & 0xFFF > (4096 - 253):
|
|
print("cross boundary")
|
|
else:
|
|
print("Pass {} address {:08x} readback failed.".format(n, sa))
|
|
sa1 = sa & 0xFFF
|
|
print("Bounds {} to {}".format(sa1, sa1 + 256))
|
|
# flash.sync()
|
|
got1 = flash[sa : sa + 256]
|
|
if got1 == data:
|
|
print("second attempt OK")
|
|
else:
|
|
print("second attempt fail", got == got1)
|
|
for n, g in enumerate(got):
|
|
if g != data[n]:
|
|
print("{} {:2x} {:2x} {:2x}".format(n, data[n], g, got1[n]))
|
|
break
|
|
|
|
|
|
helpstr = """Available tests:
|
|
test() Basic hardware test.
|
|
full_test(count=10) Full hardware test, count is no. of passes.
|
|
fstest(format=False) Check or create littlefs filesystem.
|
|
cptest() Copy 2 files to filesystem.
|
|
cp() Primitive copy routine. See docs.
|
|
"""
|
|
print(helpstr)
|