RFExplorer.py 文件源码

def ResetIOT_HW(cls, bMode):
        """Set Raspberry pi GPIO pins and reset RF Explorer device

        Parameters: 
            bMode -- True if the baudrate is set to 500000bps, False to 2400bps
        """
        try:
            import RPi.GPIO as GPIO

            #print("RPi info: " + str(GPIO.RPI_INFO)) #information about your RPi:
            #print("RPi.GPio version: " + GPIO.VERSION) #version of RPi.GPIO:
            GPIO.setwarnings(False)
            GPIO.setmode(GPIO.BOARD)    #refer to the pin numbers on the P1 header of the Raspberry Pi board
            GPIO.setup(12, GPIO.OUT)    #set /reset (pin 12) to output 
            GPIO.output(12, False)      #set /reset (pin 12) to LOW
            GPIO.setup(21, GPIO.OUT)    #set GPIO2 (pin 21) to output
            GPIO.output(21, bMode)      #set GPIO2 (pin 21) to HIGH (for 500Kbps)
            time.sleep(0.1)             #wait 100ms
            GPIO.output(12, True)       #set /reset to HIGH
            time.sleep(2.5)             #wait 2.5sec
            GPIO.setup(21, GPIO.IN)     #set GPIO2 to input
            GPIO.cleanup()              #clean up GPIO channels 

        except RuntimeError:
            print("Error importing RPi.GPIO!  This is probably because you need superuser privileges.  You can achieve this by using 'sudo' to run your script")