circuitpython/tests/extmod/uasyncio_basic.py

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try:
import uasyncio as asyncio
except ImportError:
try:
import asyncio
except ImportError:
print("SKIP")
raise SystemExit
try:
import utime
ticks = utime.ticks_ms
ticks_diff = utime.ticks_diff
except:
import time
ticks = lambda: int(time.time() * 1000)
ticks_diff = lambda t1, t0: t1 - t0
async def delay_print(t, s):
await asyncio.sleep(t)
print(s)
async def main():
print("start")
await asyncio.sleep(0.001)
print("after sleep")
t0 = ticks()
await delay_print(0.02, "short")
t1 = ticks()
await delay_print(0.04, "long")
t2 = ticks()
await delay_print(-1, "negative")
t3 = ticks()
print(
"took {} {} {}".format(
round(ticks_diff(t1, t0), -1),
round(ticks_diff(t2, t1), -1),
round(ticks_diff(t3, t2), -1),
)
)
asyncio.run(main())