N_POSITION_BAND = 10.0


 # EInkommentieren fuer Messungen Mit PSCR136
 # Auskommentieren fuer Messungen Mit PCEL
 #
cam_server.start("SATES21-CAMS-PATT1", True)
cam_server.stream.waitCacheChange(-1)
i= cam_server.stream.getChild("x_fwhm")
i_avg = create_averager(i, 30, interval = -1)


# muss auskommentiert bleiben
#Keithley = Channel("SATOP31-CSSU-PCEL1381:READOUT",'d', monitored ='True')

#_avg = create_averager(Keithley, 5, interval = -1)

def beam_ok():
    I0 = caget ("SATFE10-PEPG046:PHOTON-ENERGY-PER-PULSE-AVG")
    if I0 > 100: 
        return "Yes" 
    else :
        return "No"


def before_sampling(rec):
    while beam_ok() == "No":
        time.sleep(0.1)
        print(".")
 
def after_sampling(rec):
    if beam_ok() == "No":
        rec.invalidate()

           
i0 = Channel("SATFE10-PEPG046:PHOTON-ENERGY-PER-PULSE-AVG",'d')


class VLSSGM(RegisterBase):
    def doWrite(self, value):
        caput ("SATOP11-OSGM087:SetEnergy", value)
        time.sleep(0.2)
        cawait('SATOP11-OSGM087:MOVING', 1, timeout = 20.0, type = 'i')    
    def doRead(self):
         return caget("SATOP11-OSGM087:photonenergy")

athos = VLSSGM()
athos.initialize()

#lscan( athos, [i0,i_avg], 520.0, 540, 1.0, 0.5, setpoints=True,zigzag=True)  # Scans mit PSCR136
#lscan( athos, [i0,K_avg], 833.5, 837, 0.05, 0.5, setpoints=True,zigzag=True)  # Scans mit  PCEL



#caput ("ATHOS:SetEnergy", 680.0)
tscan( [i_avg], 10, 1 , passes=1)