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import visa
import csv

oszi = visa.instrument("GPIB::7") #get oszi for whole programm
del oszi.timeout
#timeout is removed because we might have reeally low trigger rates.
#if time between triggers is bigger as timeout, we will lose connection to the oszilloscope!
#oszi would need a reboot to recover!

#set oszi to what we need
#but leave other settings unchanged so
#you can still configure by "hand" on the
#frontpanel of oszi

def writecsv(filename, header, data):
	with open("directory/%s.csv" % filename, "w") as fobj:
		writer = csv.writer(fobj, delimiter=',', lineterminator='\n')
		known_types = ["Type:", "Points:", "Count:", "XInc:", "XOrg:", "XRef:", "YData range:", "YData center:", "Coupling:", "XRange:", "XOffset:", "YRange:", "YOffset:", "Date:", "Time:", "Frame:", "Acq mode:", "Completion:", "X Units:", "Y Units:", "Max bandwidth:", "Min bandwidth:"]
		
		#make sure that custom headers will
		#be printed after the predefined from oszi
		a = set(known_types)
		b = set(header.keys()) 		

		formatted_header = [["".join([key, (15-len(key)) * " ", str(header[key])])] for key in known_types]
		formatted_header.extend([["".join([key, (15-len(key)) * " ", str(header[key])])] for key in b.difference(a)])
		writer.writerows(formatted_header)
		writer.writerow(["Data:"])
	       	writer.writerows(data)


def create_header(header):
	d = dict()
        mache etwas umformungen sodas:
        d[headername] = headervalue ist
	return d


oszi.write("Digitize") #wait for new event
events = 999999999
for j in xrange(1, events):
	oszi.write("Digitize")
	id = str(j).zfill(9)
	print id
	#now get data
	header = create_header(oszi.ask(":WAVeform:PREamble?").split(","))
	y = oszi.ask(":WAVeform:DATA?").split(",")
	xorig = float(header["XOrg:"])
	xinc = float(header["XInc:"])
	data = [["%E" % (float(xorig) + i * float(xinc)), y[i]] for i in xrange(len(y)) ]
	
	#now we have to connvert and save to disk
	#maybe store in ram somehow before doing that?

	writecsv("Prefixfilename" + id, header, data)	

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for i in xrange(10000000):
	with open("speed/%s.csv" % str(i), "w") as fobj:
		print i

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from itertools import chain

known_types = set(['Type:', 'Points:', 'Count:', 'XInc:', 'XOrg:', 'XRef:',
    'YData range:', 'YData center:', 'Coupling:', 'XRange:', 'XOffset:',
    'YRange:', 'YOffset:', 'Date:', 'Time:', 'Frame:', 'Acq mode:',
    'Completion:', 'X Units:', 'Y Units:', 'Max bandwidth:', 'Min bandwidth:'
])

def writecsv(filename, header, data):
    all_types = chain(known_types, known_types.difference(header.keys()))
    formatted_header = (['%-15d%s' % (key, header[key])] for key in all_types)
    with open('directory/%s.csv' % filename, 'w') as fobj:
        writer = csv.writer(fobj, delimiter=',', lineterminator='\n')
        writer.writerows(chain(formatted_header, ['Data:'], data))