树莓派 RPi.GPIO

This package provides a class to control the GPIO on a Raspberry Pi. Note that this module is unsuitable for real-time or timing critical applications. This is because you can not predict when Python will be busy garbage collecting. It also runs under the Linux kernel which is not suitable for real time applications - it is multitasking O/S and another process may be given priority over the CPU, causing jitter in your program. If you are after true real-time performance and predictability, buy yourself an Arduino http://www.arduino.cc ! Note that the current release does not support SPI, I2C, PWM or serial functionality on the RPi yet. This is planned for the near future - watch this space! One-wire functionality is also planned. Example Usage : :: import RPi.GPIO as GPIO # to use Raspberry Pi board pin numbers GPIO.setmode(GPIO.BOARD) # set up GPIO output channel GPIO.setup(12, GPIO.OUT) # set RPi board pin 12 high GPIO.output(12, GPIO.HIGH) # set up GPIO input with pull-up control # (pull_up_down be PUD_OFF, PUD_UP or PUD_DOWN, default PUD_OFF) GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_UP) # input from RPi board pin 11 input_value = GPIO.input(11) # set up rising edge detection (EXPERIMENTAL) set_rising_event(11) # check for an event (EXPERIMENTAL) if GPIO.event_detected(11): print('Rising edge detected!') # set up falling edge detection (EXPERIMENTAL) GPIO.set_rising_event(11, enable=False) # disable rising edge detection (as set above) GPIO.set_falling_event(11) # set up high detection (EXPERIMENTAL) GPIO.set_falling_event(11, enable=False) # disable falling edge detection (as set above) GPIO.set_high_event(11) # set up low detection (EXPERIMENTAL) GPIO.set_high_event(11, enable=False) # disable high detection (as set above) GPIO.set_low_event(11) # to change to BCM GPIO numbering GPIO.setmode(GPIO.BCM) # to reset every channel that has been set up by this program to INPUT with no pullup/pulldown and no event detection. GPIO.cleanup()