def test_MSB_LSB(self):
data = NumberMask(random.randint(1, 0xFF), 8)
crcSize = 8
crcMax = 2**crcSize - 1
inputPoly = NumberMask(random.randint(1, crcMax), crcSize)
regInit = random.randint(0, crcMax)
xorOut = random.randint(0, crcMax)
crcProc = HwCRC()
crcProc.setRegisterInitValue(regInit)
crcProc.setXorOutValue(xorOut)
crc = crcProc.calculateMSBClassic(data, inputPoly)
revData = data.reversed()
revPoly = inputPoly.reversed()
revRegInit = reverse_number(regInit, crcSize)
revXorOut = reverse_number(xorOut, crcSize)
revCrcProc = HwCRC()
revCrcProc.setReversed()
revCrcProc.setRegisterInitValue(revRegInit)
revCrcProc.setXorOutValue(revXorOut)
crc2 = revCrcProc.calculateLSBClassic(revData, revPoly)
revCrc = reverse_number(crc2, crcSize)
# print "values: data:{} poly:{:X} init:{:X} xorOut:{:08b} crc:{:08b} revcrc:{:08b}".format( data, inputPoly, regInit, xorOut, crc, revCrc )
self.assertEqual(crc, revCrc)
def test_xor_hwcrc16_random(self):
dataSize = 24
data1 = random.randint(1, 0xFFFFFF)
data2 = random.randint(1, 0xFFFFFF)
crcSize = 16
inputPoly = 0x10000 | random.randint(1, 0xFFFF)
regInit = random.randint(1, 0xFFFF)
xorOut = random.randint(1, 0xFFFF)
crcFun = HwCRC()
crcFun.setReversed(False)
crcFun.setXorOutValue(xorOut)
crcFun.setRegisterInitValue(regInit)
crc1 = crcFun.calculate2(data1, dataSize, inputPoly, crcSize)
crc2 = crcFun.calculate2(data2, dataSize, inputPoly, crcSize)
xdata = data1 ^ data2
crcFunXor = HwCRC()
crcFunXor.setReversed(False)
xcrc = crcFunXor.calculate2(xdata, dataSize, inputPoly, crcSize)
xorcrc = crc1 ^ crc2
# print "xor: d1:{:X} {:X} d2:{:X} {:X} r:{:X} xo:{:X} xor:{:X} {:X} {:X}".format( data1, crc1, data2, crc2, regInit, xorOut, xdata, xcrc, xorcrc )
self.assertEquals(xcrc, xorcrc)
def test_calculate3_8rev_init_xor(self):
data = 0xF0
dataSize = 8
inputPoly = 0x107
crcSize = 8
regInit = 0x0F
xorOut = 0xF0
crcProc = HwCRC()
crcProc.setRegisterInitValue(regInit)
crcProc.setXorOutValue(xorOut)
crcProc.setReversed()
crc = crcProc.calculate2(data, dataSize, inputPoly, crcSize)
self.assertEqual(crc, 240)
def test_CRC_random(self):
data = NumberMask(random.randint(1, 0xFFFFFFFFFFFFFFFF), 64)
crcSize = 8
crcMax = 2**8 - 1
inputPoly = NumberMask(0x100 | random.randint(1, crcMax), crcSize)
regInit = random.randint(0, crcMax)
xorOut = random.randint(0, crcMax)
reverse = bool(random.randint(0, 1))
crc_func = HwCRC()
crc_func.setReversed(reverse)
crc_func.setRegisterInitValue(regInit)
crc_func.setXorOutValue(xorOut)
crcLib = crc_func.calculate3(data, inputPoly)
crcProc = DivisionCRC()
crcProc.setReversed(reverse)
crcProc.setRegisterInitValue(regInit)
crcProc.setXorOutValue(xorOut)
crc = crcProc.calculate3(data, inputPoly)
# print "values: {} poly:{:X} init:{:X} xorOut:{:08b} rev:{} crc:{:08b} crcmod:{:08b} crcxor:{:08b}".format( data, inputPoly, regInit, xorOut, reverse, crc, crcLib, crc^crcLib )
# self.assertEqual( crc, crcLib, "Data: {} 0x{:X} 0x{:X} 0x{:X} {}".format(data, inputPoly, regInit, xorOut, reverse ) )
self.assertEqual(crc, crcLib)
def test_CRC(self):
data = NumberMask(0xBF, 8)
inputPoly = NumberMask(0x130, 8)
regInit = 0x0
xorOut = 0x0
reverse = True
crcProc = HwCRC()
crcProc.setReversed(reverse)
crcProc.setRegisterInitValue(regInit)
crcProc.setXorOutValue(xorOut)
crc = crcProc.calculate3(data, inputPoly)
dcrcProc = DivisionCRC()
dcrcProc.setReversed(reverse)
dcrcProc.setRegisterInitValue(regInit)
dcrcProc.setXorOutValue(xorOut)
dcrc = dcrcProc.calculate3(data, inputPoly)
# crc_func = crcmod.mkCrcFun(inputPoly, rev=reverse, initCrc=regInit, xorOut=xorOut)
# crcLib = crc_func( data.toASCII() )
# print "crc: {:X} {:X} {:X} {:X}".format( dcrc, crc, crcLib, inputPoly )
self.assertEqual(dcrc, crc)
def test_crcmod_c16d64_random(self):
data = NumberMask(random.randint(1, 0xFFFFFFFFFFFFFFFF), 64)
crcSize = 16
crcMax = 2**crcSize - 1
inputPoly = NumberMask((0x1 << crcSize) | random.randint(1, crcMax),
crcSize)
# regInit = random.randint(0, crcMax)
# xorOut = random.randint(0, crcMax)
regInit = 0x0
xorOut = 0x0
reverse = bool(random.randint(0, 1))
crc_func = crcmod.mkCrcFun(inputPoly.masterData(),
rev=reverse,
initCrc=regInit,
xorOut=xorOut)
crcLib = crc_func(data.toASCII())
# print "crc: {:X} {:X}".format( crc, crc2 )
crcProc = HwCRC()
crcProc.setReversed(reverse)
crcProc.setXorOutValue(xorOut)
if reverse:
data.reorderBytes()
inputPoly.reverse()
crcInit = reverse_number(regInit ^ xorOut, crcSize)
crcProc.setRegisterInitValue(crcInit)
else:
crcInit = regInit ^ xorOut
crcProc.setRegisterInitValue(crcInit)
crc = crcProc.calculate3(data, inputPoly)
# print "values: {} poly:{:X} init:{:X} xorOut:{:08b} rev:{} crc:{:08b} crcmod:{:08b} crcxor:{:08b}".format( data, inputPoly, regInit, xorOut, reverse, crc, crcLib, crc^crcLib )
self.assertEqual(crc, crcLib)
def test_calculate_8_regInit(self):
crcProc = HwCRC()
crcProc.setRegisterInitValue(0xA5) ## 0b10100101
crc = crcProc.calculate1(0xA53937CF, 0x11D)
self.assertEqual(crc, 0x1D)