sudo pip install rpi.gpio
#!/usr/bin/env python # encoding: utf-8 import RPi.GPIO as GPIO import time # 指定GPIO口的选定模式为GPIO引脚编号模式 GPIO.setmode(GPIO.BCM) # 指定GPIO14的模式为输出模式,且初始状态为低电平。 # 如果上面GPIO口的选定模式指定为主板模式的话,这里就应该指定8号而不是14号。 GPIO.setup(14, GPIO.OUT,initial = GPIO.LOW) # 循环10次 for i in range(0, 10): # 让GPIO14输出高电平(LED灯亮) GPIO.output(14, True) # 持续一段时间 time.sleep(0.5) # 让GPIO14输出低电平(LED灯灭) GPIO.output(14, False) # 持续一段时间 time.sleep(0.5) GPIO.cleanup() # 清理GPIO口
#!/usr/bin/env python # encoding: utf-8 import time import RPi.GPIO as GPIO GPIO.cleanup() GPIO.setmode(GPIO.BCM) btn_input = 27; LED_output = 17; # GPIO btn_input set up as input. GPIO.setup(btn_input, GPIO.IN) GPIO.setup(LED_output, GPIO.OUT) # handle the button event def buttonEventHandler_rising (pin): # turn LED on print('buttonEventHandler_rising',pin) GPIO.output(LED_output,True) GPIO.add_event_detect(btn_input, GPIO.RISING , callback=buttonEventHandler_rising, bouncetime=200) try: while True : time.sleep(0.1) finally: GPIO.remove_event_detect(btn_input) GPIO.cleanup()
#!/usr/bin/python #+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ #|R|a|s|p|b|e|r|r|y|P|i|-|S|p|y|.|c|o|.|u|k| #+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ # # ultrasonic_1.py # Measure distance using an ultrasonic module # # Author : Matt Hawkins # Date : 09/01/2013 # Import required Python libraries import time import RPi.GPIO as GPIO # Use BCM GPIO references # instead of physical pin numbers GPIO.setmode(GPIO.BCM) # Define GPIO to use on Pi GPIO_TRIGGER = 23 GPIO_ECHO = 24 print "Ultrasonic Measurement" # Set pins as output and input GPIO.setup(GPIO_TRIGGER,GPIO.OUT) # Trigger GPIO.setup(GPIO_ECHO,GPIO.IN) # Echo while 1==1: # Set trigger to False (Low) GPIO.output(GPIO_TRIGGER, False) # Allow module to settle time.sleep(0.5) # Send 10us pulse to trigger GPIO.output(GPIO_TRIGGER, True) time.sleep(0.00001) GPIO.output(GPIO_TRIGGER, False) start = time.time() while GPIO.input(GPIO_ECHO)==0: start = time.time() while GPIO.input(GPIO_ECHO)==1: stop = time.time() # Calculate pulse length elapsed = stop-start # Distance pulse travelled in that time is time # multiplied by the speed of sound (cm/s) distance = elapsed * 34300 # That was the distance there and back so halve the value distance = distance / 2 print "Distance : %.1f" % distance # Reset GPIO settings GPIO.cleanup()