# pycrc -- parameterisable CRC calculation utility and C source code generator # # Copyright (c) 2006-2013 Thomas Pircher # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS # IN THE SOFTWARE. """ Collection of CRC models. This module contains the CRC models known to pycrc. To print the parameters of a particular model: from crc_models import CrcModels models = CrcModels() print(models.getList()) m = models.getParams("crc-32") if m != None: print("Width: %(width)s" % m) print("Poly: %(poly)s" % m) print("ReflectIn: %(reflect_in)s" % m) print("XorIn: %(xor_in)s" % m) print("ReflectOut: %(reflect_out)s" % m) print("XorOut: %(xor_out)s" % m) print("Check: %(check)s" % m) else: print("model not found.") """ # Class CrcModels ############################################################################### class CrcModels(object): """ CRC Models. All models are defined as constant class variables. """ models = [] models.append({ 'name': 'crc-5', 'width': 5, 'poly': 0x05, 'reflect_in': True, 'xor_in': 0x1f, 'reflect_out': True, 'xor_out': 0x1f, 'check': 0x19, }) models.append({ 'name': 'crc-8', 'width': 8, 'poly': 0x07, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': False, 'xor_out': 0x0, 'check': 0xf4, }) models.append({ 'name': 'dallas-1-wire', 'width': 8, 'poly': 0x31, 'reflect_in': True, 'xor_in': 0x0, 'reflect_out': True, 'xor_out': 0x0, 'check': 0xa1, }) models.append({ 'name': 'crc-12-3gpp', 'width': 12, 'poly': 0x80f, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': True, 'xor_out': 0x0, 'check': 0xdaf, }) models.append({ 'name': 'crc-15', 'width': 15, 'poly': 0x4599, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': False, 'xor_out': 0x0, 'check': 0x59e, }) models.append({ 'name': 'crc-16', 'width': 16, 'poly': 0x8005, 'reflect_in': True, 'xor_in': 0x0, 'reflect_out': True, 'xor_out': 0x0, 'check': 0xbb3d, }) models.append({ 'name': 'crc-16-usb', 'width': 16, 'poly': 0x8005, 'reflect_in': True, 'xor_in': 0xffff, 'reflect_out': True, 'xor_out': 0xffff, 'check': 0xb4c8, }) models.append({ 'name': 'crc-16-modbus', 'width': 16, 'poly': 0x8005, 'reflect_in': True, 'xor_in': 0xffff, 'reflect_out': True, 'xor_out': 0x0, 'check': 0x4b37, }) models.append({ 'name': 'crc-16-genibus', 'width': 16, 'poly': 0x1021, 'reflect_in': False, 'xor_in': 0xffff, 'reflect_out': False, 'xor_out': 0xffff, 'check': 0xd64e, }) models.append({ 'name': 'ccitt', 'width': 16, 'poly': 0x1021, 'reflect_in': False, 'xor_in': 0xffff, 'reflect_out': False, 'xor_out': 0x0, 'check': 0x29b1, }) models.append({ 'name': 'r-crc-16', 'width': 16, 'poly': 0x0589, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': False, 'xor_out': 0x0001, 'check': 0x007e, }) models.append({ 'name': 'kermit', 'width': 16, 'poly': 0x1021, 'reflect_in': True, 'xor_in': 0x0, 'reflect_out': True, 'xor_out': 0x0, 'check': 0x2189, }) models.append({ 'name': 'x-25', 'width': 16, 'poly': 0x1021, 'reflect_in': True, 'xor_in': 0xffff, 'reflect_out': True, 'xor_out': 0xffff, 'check': 0x906e, }) models.append({ 'name': 'xmodem', 'width': 16, 'poly': 0x1021, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': False, 'xor_out': 0x0, 'check': 0x31c3, }) models.append({ 'name': 'zmodem', 'width': 16, 'poly': 0x1021, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': False, 'xor_out': 0x0, 'check': 0x31c3, }) models.append({ 'name': 'crc-24', 'width': 24, 'poly': 0x864cfb, 'reflect_in': False, 'xor_in': 0xb704ce, 'reflect_out': False, 'xor_out': 0x0, 'check': 0x21cf02, }) models.append({ 'name': 'crc-32', 'width': 32, 'poly': 0x4c11db7, 'reflect_in': True, 'xor_in': 0xffffffff, 'reflect_out': True, 'xor_out': 0xffffffff, 'check': 0xcbf43926, }) models.append({ 'name': 'crc-32c', 'width': 32, 'poly': 0x1edc6f41, 'reflect_in': True, 'xor_in': 0xffffffff, 'reflect_out': True, 'xor_out': 0xffffffff, 'check': 0xe3069283, }) models.append({ 'name': 'crc-32-mpeg', 'width': 32, 'poly': 0x4c11db7, 'reflect_in': False, 'xor_in': 0xffffffff, 'reflect_out': False, 'xor_out': 0x0, 'check': 0x0376e6e7, }) models.append({ 'name': 'crc-32-bzip2', 'width': 32, 'poly': 0x04c11db7, 'reflect_in': False, 'xor_in': 0xffffffff, 'reflect_out': False, 'xor_out': 0xffffffff, 'check': 0xfc891918, }) models.append({ 'name': 'posix', 'width': 32, 'poly': 0x4c11db7, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': False, 'xor_out': 0xffffffff, 'check': 0x765e7680, }) models.append({ 'name': 'jam', 'width': 32, 'poly': 0x4c11db7, 'reflect_in': True, 'xor_in': 0xffffffff, 'reflect_out': True, 'xor_out': 0x0, 'check': 0x340bc6d9, }) models.append({ 'name': 'xfer', 'width': 32, 'poly': 0x000000af, 'reflect_in': False, 'xor_in': 0x0, 'reflect_out': False, 'xor_out': 0x0, 'check': 0xbd0be338, }) models.append({ 'name': 'crc-64', 'width': 64, 'poly': 0x000000000000001b, 'reflect_in': True, 'xor_in': 0x0, 'reflect_out': True, 'xor_out': 0x0, 'check': 0x46a5a9388a5beffe, }) models.append({ 'name': 'crc-64-jones', 'width': 64, 'poly': 0xad93d23594c935a9, 'reflect_in': True, 'xor_in': 0xffffffffffffffff, 'reflect_out': True, 'xor_out': 0x0, 'check': 0xcaa717168609f281, }) models.append({ 'name': 'crc-64-xz', 'width': 64, 'poly': 0x42f0e1eba9ea3693, 'reflect_in': True, 'xor_in': 0xffffffffffffffff, 'reflect_out': True, 'xor_out': 0xffffffffffffffff, 'check': 0x995dc9bbdf1939fa, }) # function getList ############################################################################### def getList(self): """ This function returns the list of supported CRC models. """ l = [] for i in self.models: l.append(i['name']) return l # function getParams ############################################################################### def getParams(self, model): """ This function returns the parameters of a given model. """ model = model.lower(); for i in self.models: if i['name'] == model: return i return None