def awaitReset(self):
try:
try:
machine.time_pulse_us(self.pin, 1)
except:
self.err = 'Not Connected'
return False
t = machine.time_pulse_us(self.pin, 0)
if t < 480:
self.err = 'Very short reset ' + str(t) + 'us'
return False
except:
self.err = 'Very long reset'
return False
self.pin.init(self.pin.OUT_OD)
self.pin.low()
time.sleep_us(60)
# let it float
self.pin.init(self.pin.IN, self.pin.PULL_NONE)
time.sleep_us(5)
if self.pin.value() == 0:
self.err = 'No presence response from door'
return False
else:
return True
def median_of_n(p, n, timeout, verbose=False):
# Return the median of n frequency measurements
# on pin p, using time_pulse_us with timeout
set = []
for i in range(n):
try:
v0 = time_pulse_us(p, 1, timeout)
if v0 < 0:
return timeout, False
v1 = time_pulse_us(p, 1, timeout)
if v1 < 0:
return timeout, False
v2 = time_pulse_us(p, 0, timeout)
if v2 < 0:
return timeout, False
v3 = time_pulse_us(p, 0, timeout)
if v3 < 0:
return timeout, False
set.append(v1 + v3)
except Exception as ex:
print('exception =', ex, ' on sample ', i)
set.sort()
if verbose:
print(set[n // 2], set)
return set[n // 2], True
def awaitReset(self):
try:
try:
machine.time_pulse_us(self.pin, 1)
except:
self.err = 'Not Connected'
return False
t = machine.time_pulse_us(self.pin, 0)
if t < 480:
self.err = 'Very short reset ' + str(t) + 'us'
return False
except:
self.err = 'Very long reset'
return False
self.pin.init(self.pin.OUT_OD)
self.pin.low()
time.sleep_us(60)
# let it float
self.pin.init(self.pin.IN, self.pin.PULL_NONE)
time.sleep_us(5)
if self.pin.value() == 0:
self.err = 'No presence response from door'
return False
else:
return True
def sensor_values():
trigger.value(0)
time.sleep_us(2)
# inicia el pulso de 10us
trigger.value(1)
time.sleep_us(10)
trigger.value(0)
# activar echo
pulso = machine.time_pulse_us(echo, 1, 30000)
dist = round(pulso * 0.01716, 2)
a=0
while dist<2 or dist>400:
trigger.value(1)
time.sleep_us(10)
trigger.value(0)
pulso = machine.time_pulse_us(echo, 1, 30000)
dist = round(pulso * 0.01716, 2)
a+=1
if a==2:
sys.stdout.write('--> midiendo..')
elif a>2:
sys.stdout.write('.')
if a!=0:
print("")
print("Distancia: ", dist,"cm")
def get_angle(self):
self.t_highs = []
self.t_lows = []
self.t_highs.append(machine.time_pulse_us(self.pin, 1, 1100))
self.t_highs.append(machine.time_pulse_us(self.pin, 1, 1100))
self.t_lows.append(machine.time_pulse_us(self.pin, 0, 1100))
self.t_lows.append(machine.time_pulse_us(self.pin, 0, 1100))
self.t_high = max(self.t_highs)
self.t_low = max(self.t_lows)
tCycle = self.t_high + self.t_low
theta = 0
dc = 0
unitsFC = 360
dcMin = 0.029
dcMax = 0.971
dutyScale = 1
if(tCycle == 0):
return 0
dc = (dutyScale * self.t_high) / tCycle
theta = ((dc - dcMin) * unitsFC) / (dcMax - dcMin)
return theta
def irBin(rx):
puls = 0
data_raw = []
print("Receive......")
while puls < 4400 or puls > 4600:
puls = time_pulse_us(rx, 1)
while puls < 30000:
puls = time_pulse_us(rx, 1)
data_raw.append(puls)
return data_raw
def decode_ir(self):
# COPPIE DI VALORI TEMPORALI
# VALORE SPERIMENTALE
nletture = 38
lettura_tot = []
ingresso = Pin("X5" , Pin.IN, Pin.PULL_UP)
# SALVO LA SEQUENZA INVIATA DAL TELECOMANDO IN UNA LISTA
for i in range(nletture):
lettura_tot.append(machine.time_pulse_us(ingresso,0))
lettura_tot.append(machine.time_pulse_us(ingresso,1))
return lettura_tot
def sendBit(self, bit):
try:
machine.time_pulse_us(self.pin, 0, timeout_us=60)
except:
self.err = 'Write timeslot timeout'
return
if bit & 1:
return
else:
self.pin.low()
self.pin.init(self.pin.OUT_OD)
time.sleep_us(60)
self.pin.init(self.pin.IN, self.pin.PULL_NONE)
return
def sendBit(self, bit):
try:
machine.time_pulse_us(self.pin, 0, timeout_us=60)
except:
self.err = 'Write timeslot timeout'
return
if bit & 1:
return
else:
self.pin.low()
self.pin.init(self.pin.OUT_OD)
time.sleep_us(60)
self.pin.init(self.pin.IN, self.pin.PULL_NONE)
return
def _send_pulse_and_wait(self):
"""
Send the pulse to trigger and listen on echo pin.
We use the method `machine.time_pulse_us()` to get the microseconds until the echo is received.
"""
self.trigger.value(0) # Stabilize the sensor
sleep_us(5)
self.trigger.value(1)
# Send a 10us pulse.
sleep_us(10)
self.trigger.value(0)
try:
pulse_time = time_pulse_us(self.echo, 1, self.echo_timeout_us)
# time_pulse_us returns -2 if there was timeout waiting for condition; and -1 if there was timeout during the main measurement. It DOES NOT raise an exception
# ...as of MicroPython 1.17: http://docs.micropython.org/en/v1.17/library/machine.html#machine.time_pulse_us
if pulse_time < 0:
MAX_RANGE_IN_CM = const(
500
) # it's really ~400 but I've read people say they see it working up to ~460
pulse_time = int(MAX_RANGE_IN_CM * 29.1) # 1cm each 29.1us
return pulse_time
except OSError as ex:
if ex.args[0] == 110: # 110 = ETIMEDOUT
raise OSError('Out of range')
raise ex
def _send_pulse_and_wait(self):
"""
Send the pulse to trigger and listen on echo pin.
We use the method `machine.time_pulse_us()` to get the microseconds until the echo is received.
"""
self.trigger.value(0) # Stabilize the sensor
time.sleep_us(5)
self.trigger.value(1)
# Send a 10us pulse.
time.sleep_us(10)
self.trigger.value(0)
try:
if (uname().sysname == 'WiPy'):
pulse_list = pulses_get(self.echo, self.echo_timeout_us)
if (len(pulse_list) == 0):
pulse_time = -1
else:
pulse_time = pulse_list[0][1]
else:
pulse_time = time_pulse_us(self.echo, 1, self.echo_timeout_us)
return pulse_time
except OSError as ex:
if ex.args[0] == 110: # 110 = ETIMEDOUT
raise OSError('Out of range')
raise ex
def ReadFLOW(trig, echo):
timeout_us = 25000 # no need to wait more then sensor's range limit (4,00 m)
sensor_hight = 1, 50
trig.value(1)
sleep_us(10)
trig.value(0)
duration = time_pulse_us(echo, 1, timeout_us)
if duration < 0:
print("Out of range")
else:
# To calculate the distance we get the pulse_time and divide it by 2
# (the pulse walk the distance twice)
# the sound speed on air (343.2 m/s), that It's equivalent to
# 0.034320 cm/us that is 1cm each 29.1us
# Calculate the Speed of Sound in M/S
sound_comp = 331.4 + (0.606 * temp_dht22) + (0.0124 * hum_dht22)
distance = (duration / 2) * 0.000343
water_hight = sensor_hight - distance
discharge = (0.209763317*(water_hight**(5/3))) / \
((water_hight + 0.918486862)**(2/3))
print(discharge, " m3/s")
pass
def get_distance(self):
# Delay measurement if measure frequency is too high in order to avoid overlapping echos.
time_to_next_measurement = 3 * Ultrasonic._MAX_ULTRASONIC_TRAVEL_TIME - \
(ticks_us() - Ultrasonic._last_trigger_us)
if time_to_next_measurement > 0:
sleep_us(time_to_next_measurement)
# Reset pins
self.echo_pin.read_digital()
self.trig_pin.write_digital(0)
sleep_us(2)
# Trigger sound
Ultrasonic._last_trigger_us = ticks_us()
self.trig_pin.write_digital(1)
sleep_us(10)
self.trig_pin.write_digital(0)
# Read echo travel time
travel_time = time_pulse_us(self.echo_pin, 1,
Ultrasonic._MAX_ULTRASONIC_TRAVEL_TIME)
if travel_time <= 0:
travel_time = Ultrasonic._MAX_ULTRASONIC_TRAVEL_TIME
# Return distance
return travel_time // self.distance_unit
def get_distance_cm(self, measurement = "CM", log=True):
'''
Calculates a single sensor ping value.
param:measurement: Defaults to Centimeter conversion. Takes string of either
"CM" or "IN".
param:log: Logging defaults to print the distance, set to False to skip.
'''
trigPin = self.trigPin
echoPin = self.echoPin
# Clears the trigPin
trigPin(HIGH);
trigPin(LOW);
sleep_us(2)
# Sets the trigPin on HIGH state for 10 micro seconds
trigPin(HIGH);
sleep_us(10);
trigPin(LOW);
# Reads the echoPin, `time` gets set to the sound wave
# travel time in microseconds.
try:
time = time_pulse_us(echoPin, HIGH, 29000)
except Exception:
run = False
# Calculating the distance in Centimeters
dist_in_cm = (time / 2.0) / 29
#Prints the distance on the Serial Monitor
if log == True:
print("Distance: ", dist_in_cm, "cm");
return dist_in_cm
def get_distance():
trig.write_digital(1)
trig.read_digital(0)
micros = time_pulse_us(echo, 1)
t_echo = micros/1000000
dist_cm = (t_echo / 2) *34300
sleep(100)
def measure_distance(self):
self.trigger.high()
utime.sleep_us(10)
self.trigger.low()
pulse_time = machine.time_pulse_us(self.echo, 1, 50000)
print(pulse_time)
return pulse_time
def distance_sensor(trigger_pin, echo_pin, echo_timeout_us=50000):
'''https://sho0.neocities.org/downloads/8c65ac1b85b79ef3fed8c9a9fa699147.pdf'''
# Инициируем работу вывода trigger (out)
trigger = machine.Pin(trigger_pin, mode=machine.Pin.OUT, pull=None)
# Инициируем работу вывода echo (in)
echo = machine.Pin(echo_pin, mode=machine.Pin.IN, pull=None)
# Стабилизируем значения датчика
trigger.value(0)
utime.sleep_us(5)
# Посылаем импульс длительностью 10мкрс
trigger.value(1)
utime.sleep_us(10)
trigger.value(0)
# Функция `machine.time_pulse_us()` нужна, чтобы вычислить время с момента отправки
# до момента получения сигнала на выводе echo
try:
pulse_time = machine.time_pulse_us(echo, machine.Pin.IN, echo_timeout_us)
except OSError as ex:
if ex.args[0] == 110: # 110 = ETIMEDOUT
raise OSError('Out of range')
raise ex
# Для рассчёта расстояния берём значение <pulse_time> в микросекундах и делим его на 2,
# (так как сигнал прошёл расстояние до препятствия, отразился и вернулся,
# то есть прошёл расстояние дважды) и делим ещё раз на 29.1, так как скорость
# звука в воздухе при температуре 20 градусов Цельсия равна 343 м/с, что при
# пересчёте даёт значение 0.0343 см/мкрс или 1 см за 29.1 микросекунды и
# в результате получим число сантиметров от сенсора до препятствия.
# При работе в других температурных условиях см. таблицу скоростей звука!
cms = (pulse_time/2) / 29.1
# Если надо ограничить количество знаков после запятой, раскомментируйте следующую строку:
#return float('{:.Nf}'.format(cms)) # where N - number of decimal points
# и закомментируйте строку ниже
return cms
def read_distance(self):
self.motor_stop(LEFT_MOTOR)
self.motor_stop(RIGHT_MOTOR)
divider = 42
maxtime = 250 * divider
pin2.read_digital()
pin1.write_digital(0)
utime.sleep_us(2)
pin1.write_digital(1)
utime.sleep_us(10)
pin1.write_digital(0)
duration = machine.time_pulse_us(pin2, 1, maxtime)
distance = duration / divider
color = (0, 255, 0)
if distance <= 35:
color = (255, 0, 0)
elif distance > 35 and distance < 50:
color = (255, 128, 0)
for led in range(4):
self.np[led] = color
self.np.show()
return distance
def distance(self):
"""Measure pulse length and return calculated distance [m]."""
self._pulse()
#PePo: pulse_width_s = time_pulse_us(self._echo, Pin.high) / 1000000
pulse_width_s = time_pulse_us(self._echo, 1) / 1000000
dist_m = (pulse_width_s / 2) * self._sound_speed
return dist_m
def csbcx(): #超声波测距 Trig.value(0) pyb.udelay(5) Trig.value(1) pyb.udelay(10) Trig.value(0) s=machine.time_pulse_us(Echo, 1, 30000) return (s*100//582)*2
def distance(tp, ep):
ep.read_digital()
tp.write_digital(1)
sleep_us(10)
tp.write_digital(0)
ts = time_pulse_us(ep, 1, 5000)
if ts > 0: return ts * 17 // 100
return ts
def sense(self):
for pin, dur_us, tmo_us, _ in self._pins:
pin.init(machine.Pin.OUT, value=1)
time.sleep_us(dur_us)
pin.init(machine.Pin.IN)
us = machine.time_pulse_us(pin, 1, tmo_us)
pin.init(machine.Pin.OUT, value=0)
yield us
def on_press(pin):
if pin.value() == EXPECTED_STATE:
pulse_len = machine.time_pulse_us(pin, EXPECTED_STATE,
DOORBELL_TIMEOUT)
if pulse_len > DOORBELL_TIME:
if in_startup:
bing_bong(STARTUP_MESSAGE)
else:
bing_bong(DOORBELL_MESSAGE)
def sample(self):
self.stabilizeSensor()
self.sendTriggerSignal()
try:
return machine.time_pulse_us(self.echo, 1, 30000)
except OSError as ex:
if ex.args[0] == 110:
raise OSError("out of range")
raise ex
def mesure_temps_A_R(broche = pin1):
broche.write_digital(0)
sleep_ms(2)
broche.write_digital(1)
sleep_ms(10)
broche.write_digital(0)
broche.read_digital()
dt = time_pulse_us(broche, 1)
return dt
def get_sonar_value(self):
# Send a pulse
self.trigger.value(0)
sleep_us(5)
self.trigger.value(1)
sleep_us(10)
self.trigger.value(0)
# Wait for the pulse and calculate the distance
return round((time_pulse_us(self.echo, 1, 30000) / 2) / 29.1)
def update(self):
try:
while self.tach_pin.value() == 1:
pass
self.pulse_us = time_pulse_us(self.tach_pin, 1, 100000)
self.RPM = 5000000 / self.pulse_us
self.engine_on = True
except:
self.engine_on = False
self.RPM = 0
def measure(self):
self._trig.value(1)
time.sleep(0.00001) # 10us
self._trig.value(0)
us = machine.time_pulse_us(self._echo, 1, self.tmo_us)
if us > 0:
dist = float(self.coef_cm * us)
return min(max(2.0, dist), 400.0)
return None
def sonic(in1, in2):
in1.write_digital(0)
in2.read_digital()
while True:
in1.write_digital(1)
in1.write_digital(0)
time = time_pulse_us(in2, 1) / 10**6
dist = int(time / 2 * 34300)
display.show(dist)
sleep(100)
def distance():
trigPin.value(1)
time.sleep_us(10)
trigPin.value(0)
pulseTime = machine.time_pulse_us(echoPin, 1, echoTimeout)
if pulseTime > 0:
return pulseTime / 58
else:
return pulseTime
def distance_in_cm(self):
self.trigger.value(1)
sleep_us(10)
self.trigger.value(0)
try:
time = time_pulse_us(self.echo, 1, 29000)
except OSError:
return None
dist_in_cm = (time / 2.0) / 29
return dist_in_cm
def Measure(self):
self.triggerPin.value(1)
#time.sleep(0.001)
self.triggerPin.value(0)
time = machine.time_pulse_us(self.echoPin, 1, 100000)
dist = 165.7 * time * 3.28084 / 1000000
#print("Dist: ", dist, " ft. Temp Timer: ", time)
return dist
def distance():
trigPin.value(1) # 送出 10 us 的觸發訊號
time.sleep_us(10)
trigPin.value(0)
# 計算高電位脈衝的時間
pulseTime = machine.time_pulse_us(echoPin, 1, echoTimeout)
if pulseTime > 0:
return pulseTime / 58 # 公分換算
else:
return pulseTime # 傳回 -1或-2
def distance_in_cm(self):
# Send a 10us pulse
self.trigger.on()
sleep_us(10)
self.trigger.off()
# Wait for the pulse and calc its duration
time_pulse = time_pulse_us(self.echo, 1, self.timeout)
if time_pulse < 0:
raise MeasurementTimeout(self.timeout)
# Divide the duration of the pulse by 2 (round-trip) and then divide it
# by 29 us/cm (speed of sound = ~340 m/s)
return (time_pulse / 2) / 29
def recvBit(self):
"""Receive one bit
High means 1 and low means 0. There will always be a short high pulse at the start of a time
window, and then either it will fall (0) or not (1).
"""
try:
t = machine.time_pulse_us(self.pin, 0, timeout_us=100)
if t > 30:
return 0
else:
return 1
except OSError:
# We hit one of the two timeouts, which means it didn't go high,
# which means a zero.
return 0
def _send_pulse_and_wait(self):
"""
Send the pulse to trigger and listen on echo pin.
We use the method `machine.time_pulse_us()` to get the microseconds until the echo is received.
"""
self.trigger.value(0) # Stabilize the sensor
time.sleep_us(5)
self.trigger.value(1)
# Send a 10us pulse.
time.sleep_us(10)
self.trigger.value(0)
try:
pulse_time = machine.time_pulse_us(self.echo, 1, self.echo_timeout_us)
return pulse_time
except OSError as ex:
if ex.args[0] == 110: # 110 = ETIMEDOUT
raise OSError('Out of range')
raise ex
import utime
import machine
from hwconfig import LED, BUTTON
# machine.time_pulse_us() function demo
print("""\
Let's play an interesting game:
You click button as fast as you can, and I tell you how slow you are.
Ready? Cliiiiick!
""")
while 1:
delay = machine.time_pulse_us(BUTTON, 1, 10*1000*1000)
if delay < 0:
print("Well, you're *really* slow")
else:
print("You are as slow as %d microseconds!" % delay)
utime.sleep_ms(10)
