我有一个使用HC-SR04和Raspberry Pi 3测量距离的Python代码。该代码一次打印一个值,我希望该代码每秒在Raspberry Pi上打印/更新距离测量值,直到键盘为止中断。
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
TRIG = 23
ECHO = 24
GPIO.setup(TRIG,GPIO.OUT)
GPIO.setup(ECHO,GPIO.IN)
GPIO.output(TRIG, False)
time.sleep(0.00001)
GPIO.output(TRIG, True)
time.sleep(1)
GPIO.output(TRIG, False)
while GPIO.input(ECHO) == 0:
pulse_start = time.time()
while GPIO.input(ECHO) == 1:
pulse_end = time.time()
pulse_duration = pulse_end - pulse_start
distance = pulse_duration * 17150
distance = round(distance, 2)
print("Distance:",distance," cm")
GPIO.cleanup()
答案 0 :(得分:0)
#!/usr/bin/python
import RPi.GPIO as GPIO
import time
def getDistance:
GPIO.output(PIN_TRIGGER, GPIO.HIGH)
time.sleep(0.00001)
GPIO.output(PIN_TRIGGER, GPIO.LOW)
while GPIO.input(PIN_ECHO)==0:
pulse_start_time = time.time()
while GPIO.input(PIN_ECHO)==1:
pulse_end_time = time.time()
pulse_duration = pulse_end_time - pulse_start_time
distance = round(pulse_duration * 17150, 2)
return distance
GPIO.setmode(GPIO.BOARD)
PIN_TRIGGER = 7
PIN_ECHO = 11
GPIO.setup(PIN_TRIGGER, GPIO.OUT)
GPIO.setup(PIN_ECHO, GPIO.IN)
GPIO.output(PIN_TRIGGER, GPIO.LOW)
print "Waiting for sensor to settle"
time.sleep(2)
while True:
print(getDistance())
finally:
GPIO.cleanup()