def cntx(request, shared_broadcaster):
cntx = Context(broadcaster=shared_broadcaster, log_level='DEBUG')
cntx.register()
def cleanup():
cntx.disconnect()
request.addfinalizer(cleanup)
return cntx
def main(pv1="XF:31IDA-OP{Tbl-Ax:X1}Mtr.VAL",
pv2="XF:31IDA-OP{Tbl-Ax:X2}Mtr.VAL"):
'''Simple example which connects to two motorsim PVs (by default).
It tests reading, writing, and subscriptions.
'''
shared_broadcaster = SharedBroadcaster()
pv1 = "XF:31IDA-OP{Tbl-Ax:X1}Mtr.VAL"
pv2 = "XF:31IDA-OP{Tbl-Ax:X2}Mtr.VAL"
# Some user function to call when subscriptions receive data.
called = []
def user_callback(command):
print("Subscription has received data: {}".format(command))
called.append(True)
ctx = Context(broadcaster=shared_broadcaster, log_level='DEBUG')
ctx.register()
ctx.search(pv1)
ctx.search(pv2)
# Send out connection requests without waiting for responses...
chan1 = ctx.create_channel(pv1)
chan2 = ctx.create_channel(pv2)
# Set up a function to call when subscriptions are received.
chan1.register_user_callback(user_callback)
reading = chan1.read()
print('reading:', reading)
chan1.subscribe()
chan2.read()
chan1.unsubscribe(0)
chan1.write((5, ))
reading = chan1.read()
assert reading.data == 5
print('reading:', reading)
chan1.write((6, ))
reading = chan1.read()
assert reading.data == 6
print('reading:', reading)
chan2.disconnect()
chan1.disconnect()
assert called
def test_thread_pv(threading_broadcaster):
from caproto.threading.client import Context, PV
pv1 = "XF:31IDA-OP{Tbl-Ax:X1}Mtr.VAL"
# pv2 = "XF:31IDA-OP{Tbl-Ax:X2}Mtr.VAL"
# Some user function to call when subscriptions receive data.
called = []
def user_callback(*, value, **kwargs):
print()
print('-- user callback', value)
called.append(True)
ctx = Context(threading_broadcaster, log_level='DEBUG')
ctx.register()
time_pv = PV(pv1, context=ctx, form='time')
ctrl_pv = PV(pv1, context=ctx, form='ctrl')
time_pv.wait_for_connection()
time_pv.add_callback(user_callback)
print('time read', time_pv.get())
print('ctrl read', ctrl_pv.get())
time_pv.put(3, wait=True)
time_pv.put(6, wait=True)
time.sleep(0.1)
assert time_pv.get() == 6
assert called
print('read', time_pv.get())
print('done')
repr(time_pv)
for k, v in PV.__dict__.items():
if isinstance(v, property):
getattr(time_pv, k)
getattr(ctrl_pv, k)