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("""\
FAT filesystem 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).
""")
        time.sleep(3)

def setup():
    check_bootsec()
    print("Performing initial setup")
    uos.VfsFat.mkfs(bdev)
    vfs = uos.VfsFat(bdev)
    uos.mount(vfs, '/flash')
    uos.chdir('/flash')
    with open("boot.py", "w") as f:
        f.write("""\
# This file is executed on every boot (including wake-boot from deepsleep)
import esp
if esp.rtc_get_reset_reason(0) == 16:
    import badge
    badge.eink_init()
    badge.display_picture(0,-1)
""")
    return vfs

@@ -945,48 +945,67 @@
 ort 
-esp%0Aif esp.rtc_get_reset_reason(0) == 16
+machine%0Aif machine.reset_cause() == machine.DEEPSLEEP_RESET
 :%0A  

use machine.reset_cause() in boot.py