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Code: Select all

import RPi.GPIO as GPIO
import argparse
import time


def blink(i,t=.1):
    GPIO.output(i, GPIO.HIGH) # Set HIGH
    time.sleep(t)             #Pause
    GPIO.output(i, GPIO.LOW)  # Set LOW
    time.sleep(t)             #Wait

if __name__ == '__main__':

    # parse command line
    parser = argparse.ArgumentParser(description='''
        This script takes a pin number and number of blinks''')
      
    parser.add_argument('-s','--scale', action="store_true", default=False, 
                            help='''play a scale of IO pins in sequence''')  
    parser.add_argument('-p','--pin', action="store", type=int, default=5,
                            help='''pick the GPIO pin number for controlling''')  
    parser.add_argument('-b','--blink', action="store", type=int, default=5,
                          help='''how many times to blink''')                         
    args = parser.parse_args()
      
    # SETUP 
    GPIO.setmode(GPIO.BOARD)

    # Routine 
    if args.scale:
        # run a scale on all of the important IO
        pins = [3, 5, 11, 13, 15, 19, 21, 23, 22, 37, 38]

        GPIO.setup(pins, GPIO.OUT)
        for j in pins:
            print("blink %d" % j)
            blink(j)
        

    else:
        ## pick the blink params 
        if args.pin:
            pin_num = args.pin      
        if args.blink:
            num_blink = args.blink
        
        print("pin %d in mode %d" % (pin_num, GPIO.gpio_function(pin_num)))
        GPIO.setup(pin_num, GPIO.OUT)
        print("pin %d in mode %d" % (pin_num, GPIO.gpio_function(pin_num)))
        
        ## run blink loop
        for i in range(0,num_blink):            #loop n times
            print("blink %d of %d times" % (i, num_blink))
            blink(i,1)

        print("terminate in state: %d" % GPIO.LOW)  
        GPIO.output(pin_num, GPIO.LOW)

    GPIO.cleanup()