Как использовать два ультразвука одновременно с Raspberry Pi? - PullRequest
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Как использовать два ультразвука одновременно с Raspberry Pi?

0 голосов
/ 21 марта 2019

Я пытался использовать две utrasonics, но проблема в том, что каждый раз, когда эхосигнал первого ультразвука, т.е. ECHO1 низкий, и он всегда в цикле.Вот мой код: 

import RPi.GPIO as GPIO                    #Import GPIO library

время импорта # Библиотека времени импорта GPIO.setmode (GPIO.BCM) # Установить нумерацию выводов GPIO 

TRIG1 = 23                                  #Associate pin 23 to TRIG
ECHO1 = 24
TRIG2 = 2
ECHO2 = 3                                  #Associate pin 24 to ECHO

print "Distance measurement in progress"

GPIO.setup(TRIG1,GPIO.OUT)                  #Set pin as GPIO out
GPIO.setup(ECHO1,GPIO.IN)                   #Set pin as GPIO in
GPIO.setup(TRIG2,GPIO.OUT)                  #Set pin as GPIO out
GPIO.setup(ECHO2,GPIO.IN)


while True:
#ultrasonic 1
  GPIO.output(TRIG1, False)                 #Set TRIG as LOW
  print "Waitng For Sensor To Settle"
  time.sleep(2)                            #Delay of 2 seconds

  GPIO.output(TRIG1, True)                  #Set TRIG as HIGH
  time.sleep(0.00001)                      #Delay of 0.00001 seconds
  GPIO.output(TRIG1, False)                 #Set TRIG as LOW

  while GPIO.input(ECHO1)==0:               #Check whether the ECHO is LOW
    pulse_start1 = time.time()              #Saves the last known time of LOW pulse
  while GPIO.input(ECHO1)==1:               #Check whether the ECHO is HIGH
    pulse_end1 = time.time()                #Saves the last known time of HIGH pulse 

  pulse_duration1 = pulse_end1 - pulse_start1 #Get pulse duration to a variable

  distance1 = pulse_duration1 * 17150        #Multiply pulse duration by 17150 to get distance
  distance1 = round(distance1, 2)            #Round to two decimal points


  if distance1 > 2 and distance1 < 400 :      #Check whether the distance is within range
    print "Distance1 :",distance1 - 0.5,"cm"  #Print distance with 0.5 cm calibration

  else:
    print "Out Of Range"                   #display out of range



#ultrasonic2
  GPIO.output(TRIG2, False)                 #Set TRIG as LOW
  print "Waitng For Sensor To Settle"
  time.sleep(2)                            #Delay of 2 seconds

  GPIO.output(TRIG2, True)                  #Set TRIG as HIGH
  time.sleep(0.00001)                      #Delay of 0.00001 seconds
  GPIO.output(TRIG2, False)                 #Set TRIG as LOW

  while GPIO.input(ECHO2)==0:               #Check whether the ECHO is LOW
    pulse_start2 = time.time()              #Saves the last known time of LOW pulse

  while GPIO.input(ECHO2)==1:               #Check whether the ECHO is HIGH
    pulse_end2 = time.time()                #Saves the last known time of HIGH pulse 

  pulse_duration2 = pulse_end2 - pulse_start2 #Get pulse duration to a variable

  distance2 = pulse_duration2 * 17150        #Multiply pulse duration by 17150 to get distance
  distance2 = round(distance2, 2)            #Round to two decimal points

  if distance2 > 2 and distance2 < 400 :      #Check whether the distance is within range
    print "Distance2 :",distance2 - 0.5,"cm"  #Print distance with 0.5 cm calibration

  else:
    print "Out Of Range"                   #display out of range
...