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Merge pull request adafruit#1262 from FoamyGuy/multitasking_with_circuitpython
adding multitasking with circuitpython files
2 parents 1a4ae4d + 73d1c11 commit acbe731

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‎Multitasking_with_CircuitPython/code_all_together.py

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"""
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This example script shows the usage of servos, LEDs, and buttons all
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used simultaneously without interrupting each other.
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"""
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import board
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import digitalio
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import time
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import neopixel
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import pulseio
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from adafruit_motor import servo
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from digitalio import DigitalInOut, Direction, Pull
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btn = DigitalInOut(board.SWITCH)
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btn.direction = Direction.INPUT
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btn.pull = Pull.UP
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prev_state = btn.value
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pixels = neopixel.NeoPixel(board.NEOPIXEL, 1)
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pixels[0] = (0, 0, 0)
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BLINK_LIST = [
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{
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"ON": 0.5,
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"OFF": 0.5,
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"PREV_TIME": -1,
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"PIN": board.D5,
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},
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{
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"ON": 0.5,
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"OFF": 0.5,
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"PREV_TIME": -1,
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"PIN": board.D6,
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},
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{
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"ON": 0.5,
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"OFF": 0.5,
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"PREV_TIME": -1,
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"PIN": board.D9,
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},
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{
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"ON": 0.5,
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"OFF": 0.5,
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"PREV_TIME": -1,
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"PIN": board.D10,
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}
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]
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SERVO_LIST = [
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{
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"MAX_ANGLE": 180,
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"MIN_ANGLE": 0,
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"PREV_TIME": -1,
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"PIN": board.A1,
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"DELAY_BETWEEN": 0.05,
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"SERVO": None,
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"MOVE_BY": 5
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},
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{
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"MAX_ANGLE": 90,
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"MIN_ANGLE": 0,
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"PREV_TIME": -1,
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"PIN": board.A3,
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"DELAY_BETWEEN": 0.02,
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"SERVO": None,
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"MOVE_BY": 2
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}
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]
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for cur_servo in SERVO_LIST:
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pwm = pulseio.PWMOut(cur_servo["PIN"], duty_cycle=2 ** 15, frequency=50)
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# Create a servo object.
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cur_servo["SERVO"] = servo.Servo(pwm)
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for led in BLINK_LIST:
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led["PIN"] = digitalio.DigitalInOut(led["PIN"])
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led["PIN"].direction = digitalio.Direction.OUTPUT
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disabled_leds = []
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# temporarily remove first two from the blink list
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disabled_leds.append(BLINK_LIST.pop(0))
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disabled_leds.append(BLINK_LIST.pop(0))
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while True:
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# Store the current time to refer to later.
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now = time.monotonic()
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cur_state = btn.value
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if cur_state != prev_state:
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if not cur_state:
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print("BTN is down")
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# swap the LED Blink patterns to the opposite pairs of LEDs
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temp = []
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temp.append(BLINK_LIST.pop(0))
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temp.append(BLINK_LIST.pop(0))
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BLINK_LIST.append(disabled_leds.pop(0))
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BLINK_LIST.append(disabled_leds.pop(0))
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disabled_leds.append(temp.pop(0))
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disabled_leds.append(temp.pop(0))
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else:
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print("BTN is up")
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prev_state = cur_state
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for led in BLINK_LIST:
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if led["PIN"].value == False:
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if now >= led["PREV_TIME"] + led["OFF"]:
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led["PREV_TIME"] = now
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led["PIN"].value = True
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if led["PIN"].value == True:
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if now >= led["PREV_TIME"] + led["ON"]:
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led["PREV_TIME"] = now
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led["PIN"].value = False
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for servo in SERVO_LIST:
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if now >= servo["PREV_TIME"] + servo["DELAY_BETWEEN"]:
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try:
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servo["SERVO"].angle += servo["MOVE_BY"]
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except ValueError as e:
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if servo["MOVE_BY"] > 0:
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servo["SERVO"].angle = servo["MAX_ANGLE"]
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else:
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servo["SERVO"].angle = servo["MIN_ANGLE"]
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if servo["SERVO"].angle >= servo["MAX_ANGLE"] or \
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servo["SERVO"].angle <= servo["MIN_ANGLE"]:
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servo["MOVE_BY"] = -servo["MOVE_BY"]
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servo["PREV_TIME"] = now

‎Multitasking_with_CircuitPython/code_blink_and_servo.py

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"""
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This example script shows the usage of servos, and LEDs
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used simultaneously without interrupting each other.
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"""
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import board
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import digitalio
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import time
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import neopixel
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import pulseio
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from adafruit_motor import servo
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pixels = neopixel.NeoPixel(board.NEOPIXEL, 1)
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pixels[0] = (0, 0, 0)
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BLINK_LIST = [
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{
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"ON": 0.25,
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"OFF": 0.25,
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"PREV_TIME": -1,
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"PIN": board.D5,
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},
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{
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"ON": 0.5,
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"OFF": 0.5,
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"PREV_TIME": -1,
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"PIN": board.D6,
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},
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{
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"ON": 1.0,
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"OFF": 1.0,
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"PREV_TIME": -1,
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"PIN": board.D9,
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},
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{
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"ON": 2.0,
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"OFF": 2.0,
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"PREV_TIME": -1,
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"PIN": board.D10,
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}
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]
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SERVO_LIST = [
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{
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"MAX_ANGLE": 180,
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"MIN_ANGLE": 0,
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"PREV_TIME": -1,
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"PIN": board.A1,
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"DELAY_BETWEEN": 0.05,
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"SERVO": None,
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"MOVE_BY": 5
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}
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]
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for cur_servo in SERVO_LIST:
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pwm = pulseio.PWMOut(cur_servo["PIN"], duty_cycle=2 ** 15, frequency=50)
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# Create a servo object.
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cur_servo["SERVO"] = servo.Servo(pwm)
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for led in BLINK_LIST:
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led["PIN"] = digitalio.DigitalInOut(led["PIN"])
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led["PIN"].direction = digitalio.Direction.OUTPUT
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while True:
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# Store the current time to refer to later.
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now = time.monotonic()
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for led in BLINK_LIST:
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if led["PIN"].value == False:
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if now >= led["PREV_TIME"] + led["OFF"]:
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led["PREV_TIME"] = now
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led["PIN"].value = True
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if led["PIN"].value == True:
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if now >= led["PREV_TIME"] + led["ON"]:
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led["PREV_TIME"] = now
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led["PIN"].value = False
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for servo in SERVO_LIST:
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if now >= servo["PREV_TIME"] + servo["DELAY_BETWEEN"]:
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try:
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servo["SERVO"].angle += servo["MOVE_BY"]
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except ValueError as e:
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if servo["MOVE_BY"] > 0:
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servo["SERVO"].angle = servo["MAX_ANGLE"]
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else:
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servo["SERVO"].angle = servo["MIN_ANGLE"]
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if servo["SERVO"].angle >= servo["MAX_ANGLE"] or \
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servo["SERVO"].angle <= servo["MIN_ANGLE"]:
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servo["MOVE_BY"] = -servo["MOVE_BY"]
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servo["PREV_TIME"] = now

‎Multitasking_with_CircuitPython/code_blink_without_sleep.py

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"""
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Using time.monotonic() to blink the built-in LED.
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Instead of "wait until" think "Is it time yet?"
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"""
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import time
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import digitalio
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import board
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# How long we want the LED to stay on
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BLINK_ON_DURATION = 0.5
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# How long we want the LED to stay off
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BLINK_OFF_DURATION = 0.25
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# When we last changed the LED state
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LAST_BLINK_TIME = -1
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# Setup the LED pin.
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led = digitalio.DigitalInOut(board.D13)
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led.direction = digitalio.Direction.OUTPUT
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while True:
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# Store the current time to refer to later.
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now = time.monotonic()
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if not led.value:
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# Is it time to turn on?
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if now >= LAST_BLINK_TIME + BLINK_OFF_DURATION:
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led.value = True
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LAST_BLINK_TIME = now
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if led.value:
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# Is it time to turn off?
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if now >= LAST_BLINK_TIME + BLINK_ON_DURATION:
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led.value = False
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LAST_BLINK_TIME = now

‎Multitasking_with_CircuitPython/code_buttons_without_sleep.py

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"""
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This example script shows how to read button state with
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debouncing that does not rely on time.sleep().
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"""
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import board
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from digitalio import DigitalInOut, Direction, Pull
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btn = DigitalInOut(board.SWITCH)
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btn.direction = Direction.INPUT
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btn.pull = Pull.UP
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prev_state = btn.value
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while True:
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cur_state = btn.value
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if cur_state != prev_state:
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if not cur_state:
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print("BTN is down")
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else:
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print("BTN is up")
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prev_state = cur_state

‎Multitasking_with_CircuitPython/code_multiple_leds.py

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"""
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This example script shows how to blink multiple LEDs at different
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rates simultaneously without each affecting the others.
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"""
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import board
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import digitalio
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import time
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BLINK_LIST = [
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{
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"ON": 0.25,
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"OFF": 0.25,
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"PREV_TIME": -1,
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"PIN": board.D5,
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},
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{
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"ON": 0.5,
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"OFF": 0.5,
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"PREV_TIME": -1,
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"PIN": board.D6,
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},
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{
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"ON": 1.0,
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"OFF": 1.0,
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"PREV_TIME": -1,
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"PIN": board.D9,
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},
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{
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"ON": 2.0,
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"OFF": 2.0,
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"PREV_TIME": -1,
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"PIN": board.D10,
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}
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]
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for led in BLINK_LIST:
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led["PIN"] = digitalio.DigitalInOut(led["PIN"])
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led["PIN"].direction = digitalio.Direction.OUTPUT
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while True:
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# Store the current time to refer to later.
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now = time.monotonic()
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for led in BLINK_LIST:
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if led["PIN"].value == False:
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if now >= led["PREV_TIME"] + led["OFF"]:
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led["PREV_TIME"] = now
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led["PIN"].value = True
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if led["PIN"].value == True:
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if now >= led["PREV_TIME"] + led["ON"]:
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led["PREV_TIME"] = now
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led["PIN"].value = False

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