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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
PID = 0x0002 # Universal Software Radio Peripheral
def hex_to_bytes (s):
if len (s) & 0x1:
raise ValueError, "Length must be even"
r = []
for i in range (0, len(s), 2):
r.append (int (s[i:i+2], 16))
return r
def msb (x):
return (x >> 8) & 0xff
def lsb (x):
return x & 0xff
class ihx_rec (object):
def __init__ (self, addr, type, data):
self.addr = addr
self.type = type
self.data = data
class ihx_file (object):
def __init__ (self):
self.pat = re.compile (r':[0-9A-F]{10,}')
def read (self, file):
r = []
for line in file:
line = line.strip().upper ()
if not self.pat.match (line):
raise ValueError, "Invalid hex record format"
bytes = hex_to_bytes (line[1:])
sum = reduce (lambda x, y: x + y, bytes, 0) % 256
if sum != 0:
raise ValueError, "Bad hex checksum"
lenx = bytes[0]
addr = (bytes[1] << 8) + bytes[2]
type = bytes[3]
data = bytes[4:-1]
if lenx != len (data):
raise ValueError, "Invalid hex record (bad length)"
if type != 0:
break;
r.append (ihx_rec (addr, type, data))
return r
def get_code (filename):
"""Read the intel hex format file FILENAME and return a tuple
of the code starting address and a list of bytes to load there.
"""
f = open (filename, 'r')
ifx = ihx_file ()
r = ifx.read (f)
r.sort (lambda a,b: a.addr - b.addr)
code_start = r[0].addr
code_end = r[-1].addr + len (r[-1].data)
code_len = code_end - code_start
code = [0] * code_len
for x in r:
a = x.addr
l = len (x.data)
code[a-code_start:a-code_start+l] = x.data
return (code_start, code)
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
(start_addr, bytes) = get_code (filename)
devid = rev
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 + bytes + trailer
assert (len (image) <= 256)
return image
def build_shell_script (out, ihx_filename, rev):
image = build_eeprom_image (ihx_filename, rev)
out.write ('#!/bin/sh\n')
out.write ('usrper -x load_firmware /usr/local/share/usrp/rev%d/std.ihx\n' % rev)
out.write ('sleep 1\n')
# print "len(image) =", len(image)
i2c_addr = 0x50
rom_addr = 0x00
hex_image = map (lambda x : "%02x" % (x,), image)
while (len (hex_image) > 0):
l = min (len (hex_image), 16)
out.write ('usrper i2c_write 0x%02x %02x%s\n' %
(i2c_addr, rom_addr, ''.join (hex_image[0:l])))
hex_image = hex_image[l:]
rom_addr = rom_addr + l
out.write ('sleep 1\n')
if __name__ == '__main__':
usage = "usage: %prog -r REV [options] bootfile.ihx"
parser = OptionParser (usage=usage)
parser.add_option ("-r", "--rev", type="int", default=-1,
help="Specify USRP revision number REV (2 or 4)")
(options, args) = parser.parse_args ()
if len (args) != 1:
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)
ihx_filename = args[0]
build_shell_script (sys.stdout, ihx_filename, options.rev)
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