def loop(w, ev_can_i_boot):
"""
checks we have the best network connection possible
"""
# maybe no need for th_net to be blocked
# wait_boot_signal(w, ev_can_i_boot, 'NET')
# check our platform CELL capabilities
desktop_or_no_cell_shield = (not linux_is_rpi()) or (
not ctx.cell_shield_en)
cell_present = not desktop_or_no_cell_shield
w.sig_net.status.emit('NET: cell features -> {}'.format(cell_present))
# loop here when desktop computer or DDH w/o cell
old_s = ''
while desktop_or_no_cell_shield:
s = net_get_my_current_wlan_ssid()
if s != old_s:
w.sig_net.update.emit('no network' if not s else s)
old_s = s
time.sleep(TH_NET_PERIOD_S)
# loop here when DDH w/ cell shield
while 1:
ctx.sem_ble.acquire()
ctx.sem_aws.acquire()
net_check_connectivity(w.sig_net)
ctx.sem_aws.release()
ctx.sem_ble.release()
time.sleep(TH_NET_PERIOD_S)
def setup_buttons_rpi(my_app, c_log):
""" link raspberry buttons with callback functions """
a = my_app
if not linux_is_rpi():
c_log.debug('SYS: not a raspberry system')
return
def button1_pressed_cb():
a.keyPressEvent(ButtonPressEvent(Qt.Key_1))
def button2_pressed_cb():
a.keyPressEvent(ButtonPressEvent(Qt.Key_2))
# upon release, check it was a press or a hold
def button3_held_cb():
a.btn_3_held = 1
def button3_released_cb():
if a.btn_3_held:
a.keyPressEvent(ButtonPressEvent(Qt.Key_6))
else:
a.keyPressEvent(ButtonPressEvent(Qt.Key_3))
a.btn_3_held = 0
a.button1 = Button(16, pull_up=True)
a.button2 = Button(20, pull_up=True)
a.button3 = Button(21, pull_up=True)
a.button1.when_pressed = button1_pressed_cb
a.button2.when_pressed = button2_pressed_cb
a.button3.when_held = button3_held_cb
a.button3.when_released = button3_released_cb
def _boot_connect_gps(w):
t = ctx.BOOT_GPS_1ST_FIX_TIMEOUT
assert (t >= 10)
w.lbl_ble.setText(BOOT_GPS_WAIT_MESSAGE.format(t / 60))
# on Desktop, do not wait
desktop_or_no_cell_shield = (not linux_is_rpi()) or (
not ctx.cell_shield_en)
if desktop_or_no_cell_shield:
e = 'no GPS / cell shield to connect to'
w.lbl_ble.setText(e)
w.sig_boot.debug.emit('BOO: {}'.format(e))
return
# tries twice to enable GPS, used for position and time source
if not dbg_hook_make_gps_give_fake_measurement:
rv = gps_configure_quectel()
if rv == 0:
return
time.sleep(1)
rv = gps_configure_quectel()
if rv:
w.sig_boot.error.emit('BOO: error opening GPS port')
os._exit(rv)
sys.exit(rv)
def click_icon_gps(self, ev):
""" clicking shift + GPS icon adjusts DDH brightness :) """
ev.accept()
s = 'GUI: secret GPS tap {}'.format(self.bright_idx)
c_log.debug(s)
if linux_is_rpi():
self.bright_idx = (self.bright_idx + 1) % 3
v = self.bright_idx
rpi_set_brightness(v)
def setup_window_center(my_app):
""" on RPi, DDH app uses full screen """
a = my_app
if linux_is_rpi() or linux_is_docker_on_rpi():
# rpi is 800 x 480
a.showFullScreen()
# get window + screen shape, match both, adjust upper left corner
r = a.frameGeometry()
c = QDesktopWidget().availableGeometry().center()
r.moveCenter(c)
a.move(r.topLeft())
def _boot_sync_time(w):
""" th_boot gets datetime source """
rv = 'local'
desktop_or_no_cell_shield = (not linux_is_rpi()) or (
not ctx.cell_shield_en)
list_src = ('NTP', ) if not desktop_or_no_cell_shield else ('GPS', 'NTP')
for i in range(3):
rv = utils_time_update_datetime_source(w)
if rv in list_src:
break
time.sleep(5)
w.sig_boot.debug.emit('BOO: sync time {}'.format(rv))
def rpi_set_brightness(v):
""" adjusts DDH screen brightness """
if not linux_is_rpi():
return
v *= 127
v = 50 if v < 50 else v
v = 255 if v > 250 else v
b = '/sys/class/backlight/rpi_backlight/brightness"'
s = 'sudo bash -c "echo {} > {}'.format(str(v), b)
o = sp.DEVNULL
sp.run(shlex.split(s), stdout=o, stderr=o)
def _boot_sync_position(w):
""" th_boot gets first GPS position """
desktop_or_no_cell_shield = (not linux_is_rpi()) or (
not ctx.cell_shield_en)
if desktop_or_no_cell_shield:
e = 'no GPS / cell shield to wait position'
w.lbl_ble.setText(e)
w.sig_boot.debug.emit('BOO: {}'.format(e))
return
t = ctx.BOOT_GPS_1ST_FIX_TIMEOUT
_o = utils_gps_get_one_lat_lon_dt(timeout=t, sig=w.sig_gps)
w.sig_gps.update.emit(_o)
def _net_is_worth_trying_sw_wifi(interface: str) -> bool:
""" in case wifis around, and known, we have a good scenario """
if not linux_is_rpi():
print('no RPI system, no wpa_cli')
return False
kn = _net_get_known_wlan_ssids()
an = _net_get_nearby_wlan_ssids(interface)
if an is None:
# interface wi-fi error, sure to try switching
return True
for _ in an:
if _ in kn:
return True
return False
def utils_gps_get_one_lat_lon_dt(timeout=3, sig=None):
"""
returns (lat, lon, dt object) or None
for a dummy or real GPS measurement
"""
# debug hook, returns None
if ctx.dbg_hook_make_gps_to_fail:
# print('DBG: returning GPS None forced')
return
# debug hook, returns our custom GPS frame
t = timeout
if ctx.dbg_hook_make_gps_give_fake_measurement:
if sig:
sig.debug.emit('GPS: dbg_hook_gps_fake_measurement')
# remember: for GPS use .utcnow(), not .now()
time.sleep(5)
dt = datetime.utcnow()
lat = '{:+.6f}'.format(12.34567866666666)
lon = '{:+.6f}'.format(-144.777777666666667)
# you can also 'return None' to simulate an error
return lat, lon, dt
# no fake measurement, let's see what we are
if not linux_is_rpi():
# sig.debug.emit('GPS: nope for desktop / laptop')
return
# get one measurement None / (lat, lon, gps_time)
d = gps_get_rmc_data(timeout=t)
# cache in case is a good one
if d:
utils_gps_cache_set(d)
return d