async def erase(self):
# must be used by caller before writing any bytes
assert not self.readonly
assert self.length == 0 # 'already wrote?'
for i in range(0, self.max_size, blksize):
SF.block_erase(self.start + i)
if i and self.message:
from glob import dis
dis.progress_bar_show(i / self.max_size)
# expect block erase to take up to 2 seconds
while SF.is_busy():
await sleep_ms(50)
async def interact(self):
from version import decode_firmware_header
from sflash import SF
date, version, _ = decode_firmware_header(self.hdr)
msg = '''\
Install this new firmware?
{version}
{built}
Binary checksum and signature will be further verified before any changes are made.
'''.format(version=version, built=date)
try:
ch = await ux_show_story(msg)
if ch == 'y':
# Accepted:
# - write final file header, so bootloader will see it
# - reboot to start process
from glob import dis
import callgate
SF.write(self.length, self.hdr)
dis.fullscreen('Upgrading...', percent=1)
callgate.show_logout(2)
else:
# they don't want to!
self.refused = True
SF.block_erase(0) # just in case, but not required
await ux_dramatic_pause("Refused.", 2)
except BaseException as exc:
self.failed = "Exception"
sys.print_exception(exc)
finally:
UserAuthorizedAction.cleanup() # because no results to store
self.pop_menu()
