Python machine.time_pulse_us() Examples
The following are 12
code examples of machine.time_pulse_us().
You can vote up the ones you like or vote down the ones you don't like,
and go to the original project or source file by following the links above each example.
You may also want to check out all available functions/classes of the module
machine
, or try the search function
.
.
Example #1
| Source File: hcsr04.py From micropython-hcsr04 with Apache License 2.0 | 6 votes |
|
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
Example #2
| Source File: hcsr04.py From pysmartnode with MIT License | 6 votes |
|
def _pulse(self) -> int:
"""
Send a pulse and wait for the echo pin using machine.time_pulse_us() to measure us.
:return: int
"""
tr = self._tr
tr.value(0)
time.sleep_us(5)
tr.value(1)
time.sleep_us(10)
tr.value(0)
try:
return machine.time_pulse_us(self._ec, 1, self._to)
except OSError as e:
if e.args[0] == 100: # TIMEOUT
raise OSError("Object too far")
raise e
Example #3
| Source File: esp_8266Full.py From python_banyan with GNU Affero General Public License v3.0 | 5 votes |
|
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
Example #4
| Source File: esp_8266.py From python_banyan with GNU Affero General Public License v3.0 | 5 votes |
|
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
Example #5
| Source File: demo.py From microbit-lib with MIT License | 5 votes |
|
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
Example #6
| Source File: hcsr04.py From microbit-lib with MIT License | 5 votes |
|
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
Example #7
| Source File: hcsr04.py From ulnoiot-upy with MIT License | 5 votes |
|
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_pin.value(0) # Stabilize the sensor
sleep_us(5)
self.trigger_pin.on()
# Send a 10us pulse.
sleep_us(10)
self.trigger_pin.off()
# try:
# pulse_time = machine.time_pulse_us(self.echo_pin, 1, self.echo_timeout_us)
# return pulse_time
# except OSError as ex:
# if ex.args[0] == 110: # 110 = ETIMEDOUT
# return -1 # out of range
# raise ex
start = ticks_us()
while not self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
start = ticks_us()
while self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
delta = ticks_diff(ticks_us(), start)
return delta
Example #8
| Source File: hcsr04.py From ulnoiot-upy with MIT License | 5 votes |
|
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_pin.value(0) # Stabilize the sensor
sleep_us(5)
self.trigger_pin.on()
# Send a 10us pulse.
sleep_us(10)
self.trigger_pin.off()
# try:
# pulse_time = machine.time_pulse_us(self.echo_pin, 1, self.echo_timeout_us)
# return pulse_time
# except OSError as ex:
# if ex.args[0] == 110: # 110 = ETIMEDOUT
# return -1 # out of range
# raise ex
start = ticks_us()
while not self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
start = ticks_us()
while self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
delta = ticks_diff(ticks_us(), start)
return delta
Example #9
| Source File: hcsr04.py From ulnoiot-upy with MIT License | 5 votes |
|
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_pin.value(0) # Stabilize the sensor
sleep_us(5)
self.trigger_pin.on()
# Send a 10us pulse.
sleep_us(10)
self.trigger_pin.off()
# try:
# pulse_time = machine.time_pulse_us(self.echo_pin, 1, self.echo_timeout_us)
# return pulse_time
# except OSError as ex:
# if ex.args[0] == 110: # 110 = ETIMEDOUT
# return -1 # out of range
# raise ex
start = ticks_us()
while not self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
start = ticks_us()
while self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
delta = ticks_diff(ticks_us(), start)
return delta
Example #10
| Source File: hcsr04.py From ulnoiot-upy with MIT License | 5 votes |
|
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_pin.value(0) # Stabilize the sensor
sleep_us(5)
self.trigger_pin.on()
# Send a 10us pulse.
sleep_us(10)
self.trigger_pin.off()
# try:
# pulse_time = machine.time_pulse_us(self.echo_pin, 1, self.echo_timeout_us)
# return pulse_time
# except OSError as ex:
# if ex.args[0] == 110: # 110 = ETIMEDOUT
# return -1 # out of range
# raise ex
start = ticks_us()
while not self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
start = ticks_us()
while self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
delta = ticks_diff(ticks_us(), start)
return delta
Example #11
| Source File: hcsr04.py From ulnoiot-upy with MIT License | 5 votes |
|
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_pin.value(0) # Stabilize the sensor
sleep_us(5)
self.trigger_pin.on()
# Send a 10us pulse.
sleep_us(10)
self.trigger_pin.off()
# try:
# pulse_time = machine.time_pulse_us(self.echo_pin, 1, self.echo_timeout_us)
# return pulse_time
# except OSError as ex:
# if ex.args[0] == 110: # 110 = ETIMEDOUT
# return -1 # out of range
# raise ex
start = ticks_us()
while not self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
start = ticks_us()
while self.echo_pin():
t = ticks_us()
if ticks_diff(t, start) > self.echo_timeout_us:
print("HCR04: timeout")
return -1
delta = ticks_diff(ticks_us(), start)
return delta
Example #12
| Source File: hcsr04.py From uPySensors with Apache License 2.0 | 5 votes |
|
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
