#!/APSshare/anaconda3/x86_64/bin/python

import epics
from time import sleep
import sys
arg2 = sys.argv
outpath = "/home/8-id-g/2018-3/tsai201810p/device/"
outfile = outpath + arg2[1]

sweepit = 1
plotit = 0


if sweepit : 
	epics.caput("8ide:2400:ReadArray.PROC", 1)
	# wait for sweep to complete -- hack with fixed delay. Is there a condition to test so we know when sweep is complete?
	print('sweep in progress')
	sleep(20)
	# close fast shutter
	epics.caput("8idg:Unidig1Bo13",1)


# read in the sweep data
indata = epics.caget("8ide:2400:ReadArray");
# read in number of non-zero elements.  
num2pts = epics.caget("8ide:2400:ReadArray.NORD");
print(num2pts);  # development
# Why doesn't this agree?   For 41 pts (82 values), returns 752.
print(sys.getsizeof(indata))  # development

print(indata)  # development

f = open(outfile,"w")
counter = 0
for i in indata :

	#print(i)
	counter=counter+1;
	if (counter % 2 == 1):
		try:
			VOLT = float(i)
		except:
			VOLT = "NaN"
			print("Error converting string to float./n")
	else :
		try:
			CURR = float(i)
		except:
			CURR = "NaN"
			print("Error converting string to float./n")

		print("VOLTAGE=",VOLT," CURRENT=",CURR)
		f.write('{0:>6} {1}\n'.format(VOLT ,CURR))

f.close()
print(arg2[1])

if plotit :
		print("Plot the data here.")