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import sys
try:
from machine import Timer
from time import sleep_ms
except:
print("SKIP")
raise SystemExit
if sys.platform in ("esp32", "esp8266", "nrf"):
# Software timers aren't implemented on the esp32 and esp8266 ports.
# The nrf port doesn't support selection of hard and soft callbacks,
# and only allows Timer(period=N), not Timer(freq=N).
print("SKIP")
raise SystemExit
else:
timer_id = -1
# Test both hard and soft IRQ handlers and both one-shot and periodic
# timers. We adjust period in tests/extmod/machine_soft_timer.py, so try
# adjusting freq here instead. The heap should be locked in hard callbacks
# and unlocked in soft callbacks.
def callback(t):
print("callback", mode[1], kind[1], freq, end=" ")
try:
allocate = bytearray(1)
print("unlocked")
except MemoryError:
print("locked")
modes = [(Timer.ONE_SHOT, "one-shot"), (Timer.PERIODIC, "periodic")]
kinds = [(False, "soft"), (True, "hard")]
for mode in modes:
for kind in kinds:
for freq in 50, 25:
timer = Timer(
timer_id,
mode=mode[0],
freq=freq,
hard=kind[0],
callback=callback,
)
sleep_ms(90)
timer.deinit()
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