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#!/usr/bin/env python
#
# Copyright 2012 Ettus Research LLC
#
import xml.etree.ElementTree as et
import base64
from optparse import OptionParser
def main():
parser = OptionParser()
parser.add_option("-l", "--lvbitxfile", dest="lvbitxfile",
help="donor labview fpga bitfile", metavar="LVBITXFILE")
parser.add_option("-b", "--bitfile", dest="bitfile",
help="xilinx generated bitfile", metavar="BITFILE")
parser.add_option("-o", "--output", dest="outfile",
help="output labview fpga bitfile", metavar="OUTFILE")
parser.add_option("-s", "--signature", dest="signature",
help="output labview fpga bitfile signature", metavar="SIGNATURE",
default="ABCDEFG")
(options, args) = parser.parse_args()
tree = et.parse(options.lvbitxfile)
root = tree.getroot()
bs = root.find('Bitstream')
if bs is None: return
print('Found "%s" tag in "%s"...' % (bs.tag, options.lvbitxfile))
print('Writing old bitfile content to "%s"...' % (options.bitfile+'.bak'))
f_old = open(options.bitfile+'.bak', 'w')
f_old.write(base64.b64decode(bs.text))
f_old.close()
print('Reading new bitfile "%s"...' % options.bitfile)
f = open(options.bitfile, 'r')
newbs = base64.b64encode(f.read())
f.close()
bs.text = newbs
print('Saving new labview bitfile to "%s"...' % options.outfile)
tree.write(options.outfile, xml_declaration=True, encoding='utf-8')
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass
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