trezor-firmware/core/src/boot.py

import storage
import storage.device
import storage.sd_salt
from trezor import config, log, loop, ui, utils, wire
from trezor.pin import show_pin_timeout

from apps.common.request_pin import can_lock_device, verify_user_pin
from apps.homescreen.lockscreen import Lockscreen


async def bootscreen() -> None:
    lockscreen = Lockscreen(bootscreen=True)
    ui.display.orientation(storage.device.get_rotation())
    while True:
        try:
            if can_lock_device():
                await lockscreen
            await verify_user_pin()
            storage.init_unlocked()
            return
        except wire.PinCancelled:
            # verify_user_pin will convert a SdCardUnavailable (in case of sd salt)
            # to PinCancelled exception.
            # Ignore exception, retry loop.
            pass
        except BaseException as e:
            # other exceptions here are unexpected and should halt the device
            if __debug__:
                log.exception(__name__, e)
            utils.halt(e.__class__.__name__)


ui.display.backlight(ui.BACKLIGHT_NONE)
ui.backlight_fade(ui.BACKLIGHT_NORMAL)
config.set_ui_wait_callback(show_pin_timeout)
loop.schedule(bootscreen())
loop.run()