import uos
from flashbdev import bdev
def check_bootsec():
buf = bytearray(bdev.SEC_SIZE)
bdev.readblocks(0, buf)
empty = True
for b in buf:
if b != 0xff:
empty = False
break
if empty:
return True
fs_corrupted()
def fs_corrupted():
import time
while 1:
print("""\
The FAT filesystem starting at sector %d with size %d sectors appears to
be corrupted. If you had important data there, you may want to make a flash
snapshot to try to recover it. Otherwise, perform factory reprogramming
of MicroPython firmware (completely erase flash, followed by firmware
programming).
""" % (bdev.START_SEC, bdev.blocks))
time.sleep(3)
def setup():
check_bootsec()
print("Performing initial setup")
uos.VfsLfs2.mkfs(bdev)
vfs = uos.VfsLfs2(bdev)
uos.mount(vfs, "/")
with open("boot.py", "w") as f:
f.write(
"""\
# This file is executed on every boot (including wake-boot from deepsleep)
#import esp
#esp.osdebug(None)
import uos, machine
#uos.dupterm(None, 1) # disable REPL on UART(0)
import gc
#import webrepl
#webrepl.start()
gc.collect()
"""
)
return vfs
