import time 

C=Channel('X07MB-OP2:SMPL-DONE',type='i')  # readback sampling finished
S=Channel('X07MB-OP2:SMPL')    # star sampling (TTL signal)
wait_value=1
print(C.read)
print('Value before pressing button' ,C.read(),'wait for',  wait_value)

print('press button, in 2 sec,X07MB-OP2:SMPL-DONE should turn from 0 to 1 ')

t0=time.time()

print('time',time.time()-t0)
S.putq(1)
print('Value after pressing button before .wait_for_value',C.read(),'wait for',  wait_value)
print('time before wait ',(time.time()-t0)) 
# now wait for                                                                                                                                                                                                                   
#C.wait_for_value(wait_value,timeout=5)  
cawait('X07MB-OP2:SMPL-DONE',wait_value,timeout=7)                                                                                                                               
print('time after wait ',(time.time()-t0))                                                                                                                                                         
print('Value after .wait_for_valuea',C.read())
print('.....  done .... ')
print('read X07MB-OP2:SMPL-DONE with caget',caget('X07MB-OP2:SMPL-DONE','i'))