def test_lock_timeout():
register_resources(instruments.resources)
rc = ResourceManager(visa_library="@mock")
res: Resource = rc.open_resource("MOCK0::mock1::INSTR")
res.write(":INSTR:CHANNEL1:VOLT 2.3")
res.write(":INSTR:CHANNEL1:VOLT 2.3")
def blocking_thread(res: Resource, event: Event):
with res.lock_context():
event.wait()
block_release: Event = Event()
blocker: Thread = Thread(
target=blocking_thread,
args=[res, block_release],
)
try:
blocker.start()
with raises(VisaIOError) as e:
with res.lock_context(timeout=0):
res.query(":INSTR:CHANNEL1:VOLT?")
assert e.value.error_code == StatusCode.error_timeout
finally:
block_release.set()
blocker.join()
reply = res.query(":INSTR:CHANNEL1:VOLT?")
assert reply == '2.3'
def test_lock():
register_resources(instruments.resources)
rc = ResourceManager(visa_library="@mock")
res: Resource = rc.open_resource("MOCK0::mock1::INSTR")
res.lock_excl(timeout=0)
res.unlock()
def test_sanity():
register_resources(instruments.resources)
rc = ResourceManager(visa_library="@mock")
res = rc.open_resource("MOCK0::mock1::INSTR")
res.write(":INSTR:CHANNEL1:VOLT 2.3")
reply = res.query(":INSTR:CHANNEL1:VOLT?")
assert reply == '2.3'
def test_non_blocking_read():
"""
Make sure the the non blocking read is fast.
"""
register_resources(instruments.resources)
rc = ResourceManager(visa_library="@mock")
res: MockResource = rc.open_resource("MOCK0::mock5::INSTR")
meas_time = Mocker5.meas_time
start_time = time.time()
res.write(":instr:channel1:volt 12")
end_time = time.time()
elapsted = end_time - start_time
assert elapsted < meas_time/2
# clear the STB reg
voltage = res.write("*CLS")
# kick off reading
start_time = time.time()
res.write(":inStrument:channel1:MEAS")
end_time = time.time()
elapsted = end_time - start_time
assert elapsted < meas_time/2
# Make sure time out happens
with pytest.raises(VisaIOError) as e:
res.wait_for_srq(0)
assert e.value.error_code == StatusCode.error_timeout
# Wait for event interrupt
start_time = time.time()
res.wait_for_srq()
end_time = time.time()
elapsted = end_time - start_time
assert elapsted > meas_time/2
start_time = time.time()
voltage = res.query(":inStrument:channel1:REAd?")
end_time = time.time()
elapsted = end_time - start_time
assert elapsted < meas_time/2
assert voltage == "12.0"
def test_blocking_read():
"""
Make sure the the measurement takes a while to complete and
that other operations are fast.
"""
register_resources(instruments.resources)
rc = ResourceManager(visa_library="@mock")
res: MockResource = rc.open_resource("MOCK0::mock5::INSTR")
meas_time = Mocker5.meas_time
start_time = time.time()
res.write(":instr:channel1:volt 12")
end_time = time.time()
elapsted = end_time - start_time
assert elapsted < meas_time/2
start_time = time.time()
voltage = res.query(":inStrument:channel1:vOlT?")
end_time = time.time()
elapsted = end_time - start_time
assert elapsted > meas_time/2
assert voltage == "12.0"