def _tick(self):
if self._state == 0:
newDevs = Meta.listSerials() - self._devices
if newDevs:
# XXXTODO: support multiple devices ? Would be hard since they disappear after a few seconds...
self._devname = newDevs.pop()
self.setSubTitle(
_('Found Leonardo at {path}.').format(path=self._devname))
self._state = 1
if self._state == 1:
# Reset
error = None
for unused in range(5):
try:
with serial.Serial(self._devname, 2000):
pass
except serial.SerialException as exc:
error = exc
time.sleep(0.5)
# Retry
else:
break
else:
self.setSubTitle(
_('Error resetting the device: {error}').format(
error=str(error)))
self._finished = True
self._timer.stop()
self.completeChanged.emit()
return
self._state = 2
if self._state == 2:
self._state = 3
self._timer.stop()
self._launchUpdate()
def initializePage(self):
self.setTitle(_('Looking for Leonardo'))
self.setSubTitle(_('Release the <b>reset</b> button now.'))
self._state = 0
self._finished = False
self._devices = Meta.listSerials()
self._devname = None
self._process = None
self._timer.start(200)