two_sequences_at_once.py

# examples/async/two_sequences_at_once.py
#
# Demonstrates: two sequences running concurrently — no hardware needed
# API style: async for loop (sequence) with asyncio.create_task()
# Sync equivalent: examples/basic/two_sequences_at_once.py
#
# create_task() starts each coroutine as a named task. Because move() and
# sequence() use asyncio.sleep() between steps, each task yields control to
# the other while it waits — no threading required.
#
# CircuitPython note: asyncio.run(main()) works with adafruit_asyncio v3+.
# On older CircuitPython, use: asyncio.get_event_loop().run_until_complete(main())

import asyncio

from varspeed_async import Vspeed

vs1 = Vspeed(init_position=0,   result="float", debug=False)
vs2 = Vspeed(init_position=100, result="float", debug=False)

seq1 = [
    (100, 2.0, 20, "QuadEaseIn"),
    (0,   2.0, 20, "QuadEaseOut"),
]
seq2 = [
    (0,   3.0, 30, "SineEaseInOut"),
    (100, 3.0, 30, "SineEaseInOut"),
]


async def run_actuator(vs, sequence, label):
    async for position, running, changed in vs.sequence(sequence, loop_max=1):
        if changed:
            print(label + ": " + str(round(position, 1)))


async def main():
    # Each task runs independently — naming them makes it clear what is concurrent.
    task_a = asyncio.create_task(run_actuator(vs1, seq1, "A"))
    task_b = asyncio.create_task(run_actuator(vs2, seq2, "B"))
    await task_a
    await task_b
    print("both done")


asyncio.run(main())