micropython/tests/extmod/machine_signal.py

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# test machine.Signal class
try:
import umachine as machine
except ImportError:
import machine
try:
machine.PinBase
machine.Signal
except AttributeError:
print("SKIP")
raise SystemExit
class Pin(machine.PinBase):
def __init__(self):
self.v = 0
def value(self, v=None):
if v is None:
return self.v
else:
self.v = int(v)
# test non-inverted
p = Pin()
s = machine.Signal(p)
s.value(0)
print(p.value(), s.value())
s.value(1)
print(p.value(), s.value())
# test inverted, and using on/off methods
p = Pin()
s = machine.Signal(p, invert=True)
s.off()
print(p.value(), s.value())
s.on()
print(p.value(), s.value())