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#!/usr/bin/env python
#
# Copyright 2004,2006 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
import re
import sys
import os, os.path
from optparse import OptionParser
# USB Vendor and Product ID's
VID = 0xfffe # Free Software Folks
def msb (x):
return (x >> 8) & 0xff
def lsb (x):
return x & 0xff
def build_eeprom_image (filename, rev):
"""Build a ``C2 Load'' EEPROM image.
For details on this format, see section 3.4.3 of
the EZ-USB FX2 Technical Reference Manual
"""
# get the code we want to run
f = open(filename, 'rb')
bytes = f.read()
devid = 4 #for compatibility
start_addr = 0 #prove me wrong
if(rev == 1):
PID = 0x0002 #USRP1
else:
PID = 0x0003 #USRP1P
rom_header = [
0xC2, # boot from EEPROM
lsb (VID),
msb (VID),
lsb (PID),
msb (PID),
lsb (devid),
msb (devid),
0 # configuration byte
]
# 4 byte header that indicates where to load
# the immediately follow code bytes.
code_header = [
msb (len (bytes)),
lsb (len (bytes)),
msb (start_addr),
lsb (start_addr)
]
# writes 0 to CPUCS reg (brings FX2 out of reset)
trailer = [
0x80,
0x01,
0xe6,
0x00,
0x00
]
image = rom_header + code_header + [ord(c) for c in bytes] + trailer
assert (len (image) <= 256)
return image
if __name__ == '__main__':
usage = "usage: %prog -r REV [options] bootfile.bin outfile.bin"
parser = OptionParser (usage=usage)
parser.add_option ("-r", "--rev", type="int", default=-1,
help="Specify USRP revision, 1 for USRP1, 2 for USRP1P")
(options, args) = parser.parse_args ()
if len (args) != 2:
parser.print_help ()
sys.exit (1)
if options.rev < 0:
sys.stderr.write (
"You must specify the USRP revision number (2 or 4) with -r REV\n")
sys.exit (1)
infile = args[0]
outfile = args[1]
image = "".join(chr(c) for c in build_eeprom_image(infile, options.rev))
f = open(outfile, 'wb')
f.write(str(image))
f.close()
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