Wait for input during several iterations of a loop in python

Question

I'm trying to write a python code to control the voltage of the GPIO Pins. The idea behind it is that in a frequency of 1KHz if half of the time the pin is off and half of the time it is on than the voltage will be 50%.

I need to keep the while loop running while waiting for user input so that I can change the speed of the motor.

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)

# The higher the number for speed the slower the motor will rotate
def motor(speed):
    i = 0
    run = True

    # Runs until user tells it to stop
    while run == True:

        # Pins should vary at every second
        time.sleep(0.001)
        i += 1
        if i % speed == 0:
            GPIO.output(4, GPIO.HIGH)
        else:
            GPIO.output(4, GPIO.LOW)

        # This block is causing the issue
        # I need the loop to keep running while waiting for the input
        if i % speed * 10 == 0:
            com = int(input("Enter 0 to quit"))
            if com == -1:
                GPIO.output(4, GPIO.LOW)
                break

    GPIO.output(4, GPIO.LOW)


run = True;
while (run):
    speed = int(input("Select Speed"))

    if speed == 0:
        run = False
    else:
        motor(speed)

GPIO.cleanup()

How do you keep the loop running and the scanner open at the same time — Bruno Illa, Mar 05 '20 at 23:49
You will more likely get help from others if you update your original post with the question you've just posed in the comments. — Hayden Eastwood, Mar 05 '20 at 23:56
Have a look at this question: https://stackoverflow.com/questions/26798767/how-to-detect-an-input-without-using-input-in-python — Meet Taraviya, Mar 05 '20 at 23:58
What's the expected user's input, is it a string or just a single key press? — David Ferenczy Rogožan, Mar 06 '20 at 00:26
It doesn't really matter, a key press would be easier though — Bruno Illa, Mar 06 '20 at 00:49

Wait for input during several iterations of a loop in python

0 Answers0