1 files changed, 182 insertions, 0 deletions
diff --git a/firmware/fx2/src/common/build_eeprom.py b/firmware/fx2/src/common/build_eeprom.py
new file mode 100755
index 000000000..023c4b3f5
--- /dev/null
+++ b/firmware/fx2/src/common/build_eeprom.py
@@ -0,0 +1,182 @@
+#!/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)