def test_can_wait_with_a_timeout():
selector = Selector()
ev1 = Semaphore(blocking=False)
with selector, ev1:
selector.add(ev1, INPUT, identifier=999)
selector.wait(timeout=0)
assert selector.ready == None
def test_can_use_a_different_value_to_identify_the_event_source():
selector = Selector()
ev1 = Semaphore(blocking=False)
with selector, ev1:
selector.add(ev1, INPUT, identifier=999)
ev1.signal()
selector.wait()
assert selector.ready == 999
def test_event_mask_defaults_to_input_and_error():
selector = Selector()
ev1 = Semaphore(blocking=False)
with selector, ev1:
selector.add(ev1)
ev1.signal()
selector.wait(timeout=0)
assert selector.ready == ev1
assert selector.has_input == True
def test_can_wait_for_timer():
selector = Selector()
timer = Timer(blocking=False,offset=0.0125)
with selector, timer:
selector.add(timer, INPUT)
timer.start()
selector.wait()
assert selector.ready == timer
def test_selector_is_a_convenient_api_to_epoll():
selector = Selector()
ev1 = Semaphore(blocking=False)
with selector, ev1:
selector.add(ev1, INPUT)
ev1.signal()
selector.wait()
assert selector.ready == ev1
assert selector.has_input == True
assert selector.has_output == False
assert selector.has_error == False
assert selector.has_hangup == False
assert selector.has_priority_input == False
def test_can_remove_source_from_selector():
selector = Selector()
ev1 = Semaphore(blocking=False)
with selector, ev1:
selector.add(ev1, INPUT)
ev1.signal()
selector.wait(timeout=0)
assert selector.ready == ev1
selector.remove(ev1)
selector.wait(timeout=0)
assert selector.ready == None
def test_can_wait_with_a_timeout():
with Semaphore(blocking=False) as ev1, \
Selector() as selector:
selector.add(ev1, INPUT, identifier=999)
selector.wait(timeout=0)
assert selector.ready == None
def test_can_remove_source_from_selector():
selector = Selector()
ev1 = Semaphore(blocking=False)
with selector, ev1:
selector.add(ev1, INPUT)
ev1.signal()
selector.wait(timeout=0)
assert selector.ready == ev1
selector.remove(ev1)
selector.wait(timeout=0)
assert selector.ready == None
def test_event_mask_defaults_to_input_and_error():
with Selector() as selector:
ev1 = Semaphore(blocking=False)
selector.add(ev1)
ev1.signal()
selector.wait(timeout=0)
assert selector.ready == ev1
assert selector.has_input == True
def test_can_use_a_different_value_to_identify_the_event_source():
with Semaphore(blocking=False) as ev1, \
Selector() as selector:
selector.add(ev1, INPUT, identifier=999)
ev1.signal()
selector.wait()
assert selector.ready == 999
def test_can_wait_for_timer():
with Timer(blocking=False,offset=0.0125) as timer, \
Selector() as selector:
selector.add(timer, INPUT)
timer.start()
selector.wait()
assert selector.ready == timer
def test_selector_is_a_convenient_api_to_epoll():
with Semaphore(blocking=False) as ev1, \
Selector() as selector:
selector.add(ev1, INPUT)
ev1.signal()
selector.wait()
assert selector.ready == ev1
assert selector.has_input == True
assert selector.has_output == False
assert selector.has_error == False
assert selector.has_hangup == False
assert selector.has_priority_input == False
def test_selecting_from_multiple_event_sources():
selector = Selector()
ev1 = Semaphore(blocking=False)
ev2 = Semaphore(blocking=False)
with selector, ev1, ev2:
selector.add(ev1, INPUT)
selector.add(ev2, INPUT)
ev1.signal()
ev2.signal()
selector.wait()
first = selector.ready
first.wait()
selector.wait()
second = selector.ready
second.wait()
assert first in (ev1, ev2)
assert second in (ev1, ev2)
assert first is not second
def test():
with i2c.I2CMaster() as bus, \
pi_header_1.pin(ALERT_PIN, direction=In, interrupt=Both, pull=PullUp) as alrt_pin, \
Selector() as selector:
selector.add(alrt_pin)
tmp102 = TMP102(bus)
tmp102.setExtendedMode(1)
tmp102.setConversionRate(0)
tmp102.setBoundTemp(False, 17.0)
tmp102.setBoundTemp(True, 19.0)
print(tmp102.getBoundTemp(False))
print(tmp102.getBoundTemp(True))
#tmp102.setAlertMode(1)
tmp102.setFault(1)
while True:
selector.wait(30)
if selector.ready is alrt_pin and selector.has_input:
print("ALERT: alert_pin:", alrt_pin.value)
temp = tmp102.readTemperature()
alrt = tmp102.alert()
print("Temperature: {0:6}C, alert: {1}, alert_pin: {2}".format(temp, alrt, alrt_pin.value))
def test_selecting_from_multiple_event_sources():
selector = Selector()
ev1 = Semaphore(blocking=False)
ev2 = Semaphore(blocking=False)
with selector, ev1, ev2:
selector.add(ev1, INPUT)
selector.add(ev2, INPUT)
ev1.signal()
ev2.signal()
selector.wait()
first = selector.ready
first.wait()
selector.wait()
second = selector.ready
second.wait()
assert first in (ev1, ev2)
assert second in (ev1, ev2)
assert first is not second
def run(self):
logging.info("Temperature logging starting...")
with i2c.I2CMaster() as bus,\
Selector() as selector,\
self.semaphore,\
self.log_timer,\
Timer(offset=0.1, interval=LCD_INTERVAL) as lcd_timer,\
Adafruit_LCDPlate.get_interrupt_pin() as int_pin:
# tolerate missing LCD
lcd = None
try:
lcd = Adafruit_LCDPlate.Adafruit_LCDPlate(bus)
fmt = FMT_ALL
logging.info("LCD is attached")
except IOError:
logging.info("LCD is not attached")
# resolution (9-12 bit) gets stored as (0-3) in bits 5,6 of config reg
config = (BITS - 9) << 5
bus.transaction(
i2c.writing_bytes(TMP100A_ADDRESS, CONFIG_REGISTER, config),
i2c.writing_bytes(TMP100B_ADDRESS, CONFIG_REGISTER, config))
for addr in (TMP100A_ADDRESS, TMP100B_ADDRESS):
read_results = bus.transaction(
i2c.writing_bytes(addr, CONFIG_REGISTER),
i2c.reading(addr, 1))
# should be 0x80 at startup/reset
logging.info("conf register for 0x{0:02x}: 0x{1:02x}".format(addr, read_results[0][0]))
right_shift = 16 - BITS
div = 1 << (BITS - 8)
selector.add(self.semaphore)
selector.add(self.log_timer)
self.log_timer.start()
if lcd:
selector.add(lcd_timer)
selector.add(int_pin)
lcd_timer.start()
while not self._terminated:
try:
if lcd:
lcd.set_led(Adafruit_LCDPlate.GREEN_PIN, False)
selector.wait()
if self._terminated:
break
if not selector.ready is int_pin:
selector.ready.wait() # consume event
for i, addr in enumerate((TMP100A_ADDRESS, TMP100B_ADDRESS)):
read_results = bus.transaction(
i2c.writing_bytes(addr, TEMP_REGISTER),
i2c.reading(addr, 2))
t = read_results[0]
self.temperatures[i] = (t[0] if t[0] <= 127 else t[0] - 256) + (t[1] >> right_shift) / div
self.timestamp = time()
if lcd:
lcd.set_led(Adafruit_LCDPlate.GREEN_PIN, True)
lcd.set_led(Adafruit_LCDPlate.RED_PIN, False)
if selector.ready is self.log_timer:
self.log_handler.emit(TempLogRecord(self.timestamp, self.temperatures))
elif selector.ready is lcd_timer:
lcd.clear()
lcd.message(fmt.format(
self.temperatures[0], c2f(self.temperatures[0]),
self.temperatures[1], c2f(self.temperatures[1])))
elif selector.ready is int_pin:
# this is hacky...
intcap = lcd.chip.registers.read_register(INTCAPA) # required?
button_state = lcd.get_button_state()
if button_state == 0:
pass # button up event: ignore
else:
if lcd.button_state_pressed(button_state, Adafruit_LCDPlate.SELECT):
fmt = FMT_ALL
elif lcd.button_state_pressed(button_state, Adafruit_LCDPlate.UP):
fmt = FMT_INSIDE
elif lcd.button_state_pressed(button_state, Adafruit_LCDPlate.DOWN):
fmt = FMT_OUTSIDE
elif lcd.button_state_pressed(button_state, Adafruit_LCDPlate.LEFT):
fmt = FMT_C
elif lcd.button_state_pressed(button_state, Adafruit_LCDPlate.RIGHT):
fmt = FMT_F
else:
fmt = "Unknown\nButton!"
lcd_timer.stop()
lcd_timer.start()
except KeyboardInterrupt:
logging.info("Keyboard interrupt received")
self._terminated = True
except SystemExit:
logging.info("SystemExit received")
self._terminated = True
except:
logging.exception("Error reading sensors:")
if lcd:
lcd.set_led(Adafruit_LCDPlate.RED_PIN, True)
if lcd:
lcd.clear()
lcd.set_backlight(False)
lcd.set_led(Adafruit_LCDPlate.GREEN_PIN, False)
lcd.set_led(Adafruit_LCDPlate.RED_PIN, False)
logging.info("Temperature logging stopped.")
self.log_handler.close()
lcd.message("It's\nworking!")
sleep(5)
lcd.set_backlight(False)
for p in [GREEN_PIN, RED_PIN]:
lcd.set_led(p, True)
sleep(1)
lcd.set_led(p, False)
sleep(1)
lcd.set_backlight(True)
lcd.clear()
lcd.message("Push some\nbuttons...")
with Selector() as selector, get_interrupt_pin() as int_pin:
selector.add(int_pin)
for i in range(10):
selector.wait(10)
if selector.ready is int_pin:
print("Button state: 0x{0:02x}, 0b{0:08b}".format(
lcd.get_button_state()))
"""
while True:
print("GPIOA: 0x{0:02x}, 0b{0:08b}".format(lcd.chip.registers.read_register(GPIOA)))
print("GPIOB: 0x{0:02x}, 0b{0:08b}".format(lcd.chip.registers.read_register(GPIOB)))
sleep(1)
"""
slow_type_from_left(lcd, "Mary had a\nlittle lamb!")
sleep(5)
