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#
# example of using a connection callback that will be called
# for any change in connection status
import epics
import time
import sys
from pvnames import motor1
write = sys.stdout.write
def onConnectionChange(pvname=None, conn= None, **kws):
write('PV connection status changed: %s %s\n' % (pvname, repr(conn)))
sys.stdout.flush()
def onValueChange(pvname=None, value=None, host=None, **kws):
write('PV value changed: %s (%s) %s\n' % ( pvname, host, repr(value)))
sys.stdout.flush()
mypv = epics.PV(motor1,
connection_callback= onConnectionChange,
callback= onValueChange)
mypv.get()
write('Now waiting, watching values and connection changes:\n')
t0 = time.time()
while time.time()-t0 < 300:
time.sleep(0.01)
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