import uos from flashbdev import bdev def check_bootsec(): buf = bytearray(bdev.ioctl(5, 0)) # 5 is 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.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 webrepl #webrepl.start() """ ) return vfs