dfu.py
121 lines
| 4.4 KiB
| text/x-python
|
PythonLexer
/ bin / dfu.py
| r48 | #!/usr/bin/python | |||
| # Written by Antonio Galea - 2010/11/18 | ||||
| # Distributed under Gnu LGPL 3.0 | ||||
| # see http://www.gnu.org/licenses/lgpl-3.0.txt | ||||
| import sys,struct,zlib,os | ||||
| from optparse import OptionParser | ||||
| DEFAULT_DEVICE="0x0483:0xdf11" | ||||
| def named(tuple,names): | ||||
| return dict(zip(names.split(),tuple)) | ||||
| def consume(fmt,data,names): | ||||
| n = struct.calcsize(fmt) | ||||
| return named(struct.unpack(fmt,data[:n]),names),data[n:] | ||||
| def cstring(string): | ||||
| return string.split('\0',1)[0] | ||||
| def compute_crc(data): | ||||
| return 0xFFFFFFFF & -zlib.crc32(data) -1 | ||||
| def parse(file,dump_images=False): | ||||
| print 'File: "%s"' % file | ||||
| data = open(file,'rb').read() | ||||
| crc = compute_crc(data[:-4]) | ||||
| prefix, data = consume('<5sBIB',data,'signature version size targets') | ||||
| print '%(signature)s v%(version)d, image size: %(size)d, targets: %(targets)d' % prefix | ||||
| for t in range(prefix['targets']): | ||||
| tprefix, data = consume('<6sBI255s2I',data,'signature altsetting named name size elements') | ||||
| tprefix['num'] = t | ||||
| if tprefix['named']: | ||||
| tprefix['name'] = cstring(tprefix['name']) | ||||
| else: | ||||
| tprefix['name'] = '' | ||||
| print '%(signature)s %(num)d, alt setting: %(altsetting)s, name: "%(name)s", size: %(size)d, elements: %(elements)d' % tprefix | ||||
| tsize = tprefix['size'] | ||||
| target, data = data[:tsize], data[tsize:] | ||||
| for e in range(tprefix['elements']): | ||||
| eprefix, target = consume('<2I',target,'address size') | ||||
| eprefix['num'] = e | ||||
| print ' %(num)d, address: 0x%(address)08x, size: %(size)d' % eprefix | ||||
| esize = eprefix['size'] | ||||
| image, target = target[:esize], target[esize:] | ||||
| if dump_images: | ||||
| out = '%s.target%d.image%d.bin' % (file,t,e) | ||||
| open(out,'wb').write(image) | ||||
| print ' DUMPED IMAGE TO "%s"' % out | ||||
| if len(target): | ||||
| print "target %d: PARSE ERROR" % t | ||||
| suffix = named(struct.unpack('<4H3sBI',data[:16]),'device product vendor dfu ufd len crc') | ||||
| print 'usb: %(vendor)04x:%(product)04x, device: 0x%(device)04x, dfu: 0x%(dfu)04x, %(ufd)s, %(len)d, 0x%(crc)08x' % suffix | ||||
| if crc != suffix['crc']: | ||||
| print "CRC ERROR: computed crc32 is 0x%08x" % crc | ||||
| data = data[16:] | ||||
| if data: | ||||
| print "PARSE ERROR" | ||||
| def build(file,targets,device=DEFAULT_DEVICE): | ||||
| data = '' | ||||
| for t,target in enumerate(targets): | ||||
| tdata = '' | ||||
| for image in target: | ||||
| tdata += struct.pack('<2I',image['address'],len(image['data']))+image['data'] | ||||
| tdata = struct.pack('<6sBI255s2I','Target',0,1,'ST...',len(tdata),len(target)) + tdata | ||||
| data += tdata | ||||
| data = struct.pack('<5sBIB','DfuSe',1,len(data)+11,len(targets)) + data | ||||
| v,d=map(lambda x: int(x,0) & 0xFFFF, device.split(':',1)) | ||||
| data += struct.pack('<4H3sB',0,d,v,0x011a,'UFD',16) | ||||
| crc = compute_crc(data) | ||||
| data += struct.pack('<I',crc) | ||||
| open(file,'wb').write(data) | ||||
| if __name__=="__main__": | ||||
| usage = """ | ||||
| %prog [-d|--dump] infile.dfu | ||||
| %prog {-b|--build} address:file.bin [-b address:file.bin ...] [{-D|--device}=vendor:device] outfile.dfu""" | ||||
| parser = OptionParser(usage=usage) | ||||
| parser.add_option("-b", "--build", action="append", dest="binfiles", | ||||
| help="build a DFU file from given BINFILES", metavar="BINFILES") | ||||
| parser.add_option("-D", "--device", action="store", dest="device", | ||||
| help="build for DEVICE, defaults to %s" % DEFAULT_DEVICE, metavar="DEVICE") | ||||
| parser.add_option("-d", "--dump", action="store_true", dest="dump_images", | ||||
| default=False, help="dump contained images to current directory") | ||||
| (options, args) = parser.parse_args() | ||||
| if options.binfiles and len(args)==1: | ||||
| target = [] | ||||
| for arg in options.binfiles: | ||||
| try: | ||||
| address,binfile = arg.split(':',1) | ||||
| except ValueError: | ||||
| print "Address:file couple '%s' invalid." % arg | ||||
| sys.exit(1) | ||||
| try: | ||||
| address = int(address,0) & 0xFFFFFFFF | ||||
| except ValueError: | ||||
| print "Address %s invalid." % address | ||||
| sys.exit(1) | ||||
| if not os.path.isfile(binfile): | ||||
| print "Unreadable file '%s'." % binfile | ||||
| sys.exit(1) | ||||
| target.append({ 'address': address, 'data': open(binfile,'rb').read() }) | ||||
| outfile = args[0] | ||||
| device = DEFAULT_DEVICE | ||||
| if options.device: | ||||
| device=options.device | ||||
| try: | ||||
| v,d=map(lambda x: int(x,0) & 0xFFFF, device.split(':',1)) | ||||
| except: | ||||
| print "Invalid device '%s'." % device | ||||
| sys.exit(1) | ||||
| build(outfile,[target],device) | ||||
| elif len(args)==1: | ||||
| infile = args[0] | ||||
| if not os.path.isfile(infile): | ||||
| print "Unreadable file '%s'." % infile | ||||
| sys.exit(1) | ||||
| parse(infile, dump_images=options.dump_images) | ||||
| else: | ||||
| parser.print_help() | ||||
| sys.exit(1) | ||||
