def predictTest(self, cursor, userId, clf):
cursor.execute(
'''
SELECT TestRatings.movieId, ifnull(cast(MoviePopularity.popularity*10 as integer),5), MovieYearGenres.year, genreBits, {0} FROM TestRatings
join MovieYearGenres on TestRatings.movieId=MovieYearGenres.id
join MovieTags on TestRatings.movieId=MovieTags.id
left join MoviePopularity on TestRatings.movieId=MoviePopularity.movieId
where TestRatings.userId=?'''.format(','.join(
['tagBits' + str(i) for i in range(self.tagBitsCount)])),
(userId, ))
testingData = [
list(row[0:3]) +
list(bitstring.Bits(int=row[3], length=len(self.ALL_GENRES))) +
flatNestList(
[list(bitstring.Bits(int=b, length=32)) for b in row[4:]])
for row in cursor.fetchall()
]
testingData = np.array(testingData, dtype='int32')
predictY = clf.predict(testingData[:, 1:])
toDB = predictY[:, None]
toDB = np.insert(toDB, 1, userId, axis=1)
toDB = np.insert(toDB, 2, testingData[:, 0], axis=1)
cursor.executemany(
'update TestRatings set predict=? where userId=? and movieId=?',
toDB.tolist())
def parse(self, bitstrm):
"""
MSP430 instructions can have one or two extension words for 16 bit immediates
We therefore extend the normal parsing so that we make sure we can
get another word if we have to.
"""
data = Instruction.parse(self, bitstrm)
data['S'] = None
data['D'] = None
# We don't always have a source or destination.
# Theoretically I could put these in the TypeXInstruction classes, but
# I'm lazy. Note that we resolve these here, as opposed to later, due to
# needing to fiddle with the bitstream.
l.debug(data)
if 's' in data:
src_mode = int(data['A'], 2)
if (src_mode == ArchMSP430.Mode.INDEXED_MODE and data['s'] != '0011') \
or (data['s'] == '0000' and src_mode == ArchMSP430.Mode.INDIRECT_AUTOINCREMENT_MODE):
data['S'] = bitstring.Bits(uint=bitstrm.read('uintle:16'),
length=16).bin
self.bitwidth += 16
if 'd' in data:
dst_mode = int(data['a'], 2)
if dst_mode == ArchMSP430.Mode.INDEXED_MODE:
data['D'] = bitstring.Bits(uint=bitstrm.read('uintle:16'),
length=16).bin
self.bitwidth += 16
return data
def trainClassifier(self, cursor, userId, clf):
# The default value of MoviePopularity.popularity is 5 because
# select cast(sum(rating) as real) / count(*) from Ratings
# returns 0.503819588139731
cursor.execute(
'''
SELECT Ratings.rating, ifnull(cast(MoviePopularity.popularity*10 as integer),5), MovieYearGenres.year, genreBits, {0} FROM Ratings
join MovieYearGenres on Ratings.movieId=MovieYearGenres.id
join MovieTags on Ratings.movieId=MovieTags.id
left join MoviePopularity on Ratings.movieId=MoviePopularity.movieId
where Ratings.userId=?'''.format(','.join(
['tagBits' + str(i) for i in range(self.tagBitsCount)])),
(userId, ))
trainingData = [
list(row[0:3]) +
list(bitstring.Bits(int=row[3], length=len(self.ALL_GENRES))) +
flatNestList(
[list(bitstring.Bits(int=b, length=32)) for b in row[4:]])
for row in cursor.fetchall()
]
trainingData = np.array(trainingData, dtype='int32')
if len(trainingData) == 0:
raise Exception(
'User {0} does not appear in training set.'.format(userId))
y = trainingData[:, 0]
X = trainingData[:, 1:]
return clf.fit(X, y)
def spi_read(self, length):
'''Read data from SPI device
FPGA shall be configured with an appropriate bitstream that implements JTAG-to-SPI bridge using Xilinx BSCAN_SPARTAN6 primitive
Xilinx USER1 instruction is used to activate this bridge
Other TAPs in JTAG chain are put in bypass and their bypass registers are loaded with zeros
Parameter:
'length' : (int) Number of bytes to read
Return:
(list) Read bytes
'''
# logger.debug(f'SPI read, {length:d} bytes')
# Reset TAP and advance TAP to Shift-IR state
self.owner.jtag_advance(tms=bitstring.Bits('0b00110, 0b11111'))
# Write USER1 instruction and advance TAP to Exit1-IR state
self.owner.jtag_shift(data=self.ir_before +
self.instructions['user1'] + self.ir_after,
length=None,
tms=bitstring.Bits('0b1'))
# Advance TAP to Shift-DR state
self.owner.jtag_advance(tms=bitstring.Bits('0b0011'))
# Prepare data
data_w = bitstring.BitArray(length *
8) # Dummy zero bits for data read
data_w.append(
'0b1'
) # Fist bit to be shifted out shall be one. This is needed to activate SPI SS# in JTAG-to-SPI bridge as there might be zeros before it that get loaded into bypass registers of other TAPs
data_w.prepend(
'0b0'
) # Last bit to be shifted out (dummy bit) is needed in order to shift in the last bit from TDO as BSCAN_SPARTAN6 updates TDO on falling edge (see JTAG-to-SPI bridge FPGA design for details)
data_w.prepend(self.dr_before)
data_w.prepend(self.dr_after)
# Shift data through JTAG-to-SPI bridge and advance TAP to Exit-DR state
data_r = self.owner.jtag_shift(data=data_w,
length=data_w.length,
tms=bitstring.Bits('0b1'))
# Advance TAP to Test-Logic-Reset state
self.owner.jtag_advance(tms=bitstring.Bits('0b1111'))
data_r = data_r[:length * 8]
data_r.reverse()
data_r = list(data_r.bytes)
# logger.debug(f'OK, {len(data_r):d} bytes: [{", ".join([f"0x{item:02X}" for item in data_r])}]')
return data_r
def test_compressed_message_bits__invalid_length__raises(self):
# All '1' bits (27 bits)
bits = bitstring.Bits(bin='0b111111111111111111111111111')
with self.assertRaises(ValueError):
protocol.PassthroughSmallMessage(bits)
# All '1' bits (25 bits)
bits = bitstring.Bits(bin='0b1111111111111111111111111')
with self.assertRaises(ValueError):
protocol.PassthroughSmallMessage(bits)
def setUp(self):
self.helper = TestHelper()
self.env = simpy.Environment()
self.network = util.Network(self.env, self.helper.settings)
self.peer_a_id = bs.Bits(uint=0, length=16)
self.peer_b_id = bs.Bits(uint=1, length=16)
self.peer_a = unittest.mock.Mock(spec=peer.Peer)
self.peer_b = unittest.mock.Mock(spec=peer.Peer)
self.peer_a_address = self.network.register(self.peer_a)
self.peer_b_address = self.network.register(self.peer_b)
def get_spn_bytes(message_data_bitstring, spn, pgn):
spn_object = get_spn_object(spn)
spn_length = spn_object["SPNLength"]
spn_start = lookup_spn_startbit(spn_object, spn, pgn)
if type(spn_length) is str and spn_length.startswith("Variable"):
delimiter = spn_object.get("Delimiter")
pgn_object = get_pgn_object(pgn)
spn_list = pgn_object["SPNs"]
if delimiter is None:
if len(spn_list) == 1:
spn_end = len(message_data_bitstring.bytes) * 8 - 1
cut_data = message_data_bitstring[spn_start:spn_end + 1]
return cut_data
else:
print(
"Warning: skipping SPN %d in non-delimited and multi-spn and variable-length PGN %d"
" (this is most-likely a problem in the JSONdb or source DA)"
% (spn, pgn),
file=sys.stderr)
return bitstring.Bits(
bytes=b''
) # no way to handle multi-spn messages without a delimiter
else:
spn_ordinal = spn_list.index(spn)
delimiter = delimiter.replace('0x', '')
delimiter = bytes.fromhex(delimiter)
spn_fields = message_data_bitstring.bytes.split(delimiter)
if spn_start != -1: # variable-len field with defined start; must be first variable-len field
spn_end = len(spn_fields[0]) * 8 - 1
cut_data = bitstring.Bits(
bytes=spn_fields[0])[spn_start:spn_end + 1]
return cut_data
else: # variable-len field with unspecified start; requires field counting
startbits_list = pgn_object["SPNStartBits"]
num_fixedlen_spn_fields = sum(1 for s in startbits_list
if s != -1)
variable_spn_ordinal = spn_ordinal - num_fixedlen_spn_fields
if num_fixedlen_spn_fields > 0:
variable_spn_fields = spn_fields[1:]
else:
variable_spn_fields = spn_fields
try:
cut_data = bitstring.Bits(
bytes=variable_spn_fields[variable_spn_ordinal])
except IndexError:
cut_data = bitstring.Bits(bytes=b'')
return cut_data
else:
spn_end = spn_start + spn_length - 1
cut_data = message_data_bitstring[spn_start:spn_end + 1]
return cut_data
def test_sends_queries(self):
queried_id = bs.Bits(uint=10, length=16)
excluded_id = bs.Bits(uint=111, length=16)
self.network.send_query(self.peer_a_id, self.peer_a_address,
self.peer_b_address, queried_id,
set((excluded_id, )), 0)
self.env.run()
self.peer_b.recv_query.assert_called_with(self.peer_a_id,
queried_id,
0,
excluded_peer_ids=set(
(excluded_id, )))
def transform(self, num):
# id = (num[0])
id = bitstring.Bits(uint=num[0], length=16)
# x = ((num[1]) << 8) | (num[2])
x = bitstring.Bits(uint=((num[2]) << 8) | (num[1]), length=16)
# y = ((num[3]) << 8) | (num[4])
y = bitstring.Bits(uint=((num[4]) << 8) | (num[3]), length=16)
# z = ((num[5]) << 8) | (num[6])
z = bitstring.Bits(uint=((num[6]) << 8) | (num[5]), length=16)
# hsh =num[7]
hsh = 0x0
return id.unpack('int')[0], x.unpack('int')[0], y.unpack('int')[0], z.unpack('int')[0], hsh
def parse(package, offset):
name, offset = parse_name(package, offset, '')
r_type = bitstring.Bits(package)[offset:offset + 16].uint
offset += 16
r_class = bitstring.Bits(package)[offset:offset + 16].uint
offset += 16
ttl = bitstring.Bits(package)[offset:offset + 32].uint
offset += 32
rdlength = bitstring.Bits(package)[offset:offset + 16].uint
offset += 16
rdata, offset = parse_address(package, offset, r_type, rdlength)
return DNSResponse(name, r_type, r_class, ttl, rdlength, rdata), offset
def id_with_prefix(self, prefix_str):
while True:
prefix = bs.Bits(bin=prefix_str)
suffix_length = self.settings['id_length'] - len(prefix)
suffix = bs.Bits(uint=random.randrange(2 ** suffix_length),
length=suffix_length)
peer_id = prefix + suffix
if peer_id not in self.all_peer_ids:
self.all_peer_ids.add(peer_id)
peer_prefix = peer_id[:self.settings['prefix_length']]
self.all_prefixes.setdefault(peer_prefix, 0)
self.all_prefixes[peer_prefix] += 1
return peer_id
def codehuffmantree(huffmantreenode, nodecode):
""" Traverse Huffman Tree to produce Prefix Codes"""
#huffmantreenode.print()
#print("Nodecode = ", nodecode)
if (huffmantreenode.left == [] and huffmantreenode.right == []):
huffmantreenode.code = nodecode #no children - assign code
else:
leftcode = copy.copy(nodecode) #append 0 to left
leftcode.append(bitstring.Bits('0b0'))
codehuffmantree(huffmantreenode.left,leftcode)
rightcode = copy.copy(nodecode) #append 1 to right
rightcode.append(bitstring.Bits('0b1'))
codehuffmantree(huffmantreenode.right,rightcode)
def read_angle():
with SMBus(1) as bus:
# todo 1: read registers as blocks of data to make it faster
# todo 2: use locks to avoid concurrency issues
# todo 3: check is_ready register
# todo 4: use more precise values (second component)
# b1 = bus.read_byte_data(0x18, 0x27, 3) # status register
x = bus.read_byte_data(0x18, 0x29)
y = bus.read_byte_data(0x18, 0x2B)
x_val = float(bitstring.Bits(uint=x, length=8).unpack('int')[0])
y_val = float(bitstring.Bits(uint=y, length=8).unpack('int')[0])
angle = math.degrees(math.atan2(-y_val, x_val))
# print("({}, {}) -> === {}".format(x_val, y_val, angle))
return angle
def decode(self, arg):
if type(arg) is bs.Bits:
if arg.len != 64:
raise ValueError("Ucodedecoder: Invalid bitstring length %u, only 64 bit are supported" % arg.len)
bits = arg
elif type(arg) is int or type(arg) is long:
bits = bs.Bits(uint=arg, length=64)
else:
raise ValueError("Ucodedecoder: Unsupported argument type %s, supported are Bitstring.bits, int and long" % type(arg))
if not self.plaintext:
all1 = bs.Bits(uint=0xffffffffffffffff, length=64)
bits = all1 ^ bits
opc = Opcode(bits, self.arch)
if self.arch == "k8":
opbits = next(bits.cut(9, 1))
mnem = self.getOp(opbits)
opc.mnemonic = mnem.mnemonic
opc.mnemcomment = mnem.comment
opc.opbits = opbits
dstbits = next(bits.cut(6, 12))
reg = self.getReg(dstbits)
opc.dst = reg
opc.dstbits = dstbits
dszbits = next(bits.cut(3, 31))
dsz = self.getDsz(dszbits)
opc.dstsize = dsz[0]
opc.dstzx = dsz[1]
opc.dszbits = dszbits
opc.dstregsized = opc.dst.getReg(opc.dstsize)
immbit = next(bits.cut(1, 40))
isimm = immbit.all(False)
opc.immbit = immbit
opc.immsrc = isimm
immbits = next(bits.cut(16, 48))
opc.immbits = immbits
srcbits = next(bits.cut(6, 49))
opc.srcbits = srcbits
if isimm:
opc.imm = immbits.uint
opc.srcreg = None
else:
opc.srcreg = self.getReg(srcbits)
opc.imm = None
return opc
def num2vec(num):
rep_sc = str('{:.11E}'.format(num))
# print(rep_sc)
dec_part = int(rep_sc.split("E")[0].replace(".", ""))
c = 1
if dec_part < 0:
c = -1
dec_part = abs(dec_part)
exp_part = int(rep_sc.split("E")[1])
if exp_part < 0:
exp_pos = 0
exp_neg = exp_part
else:
exp_pos = exp_part
exp_neg = 0
exp_pos = abs(exp_pos)
exp_neg = abs(exp_neg)
rep_str = str("{:03}{:03}{:012}".format(exp_pos, exp_neg, dec_part))
# print(rep_str)
# print(dec_part)
rep_int = int(rep_str) * c
rep_bin = bitstring.Bits(int=rep_int, length=64).bin
# print(rep_bin)
bin_tensor = torch.tensor(np.array([float(x) for x in rep_bin]))
return bin_tensor
def __wmem2bin(self, mem, fileName, isBinaryString):
import struct
import bitstring
lenExtMemWord = 64
outFile = open(fileName, "wb")
for memInd in range(len(mem)):
if isBinaryString:
if len(mem[memInd]) > lenExtMemWord:
raise "SIMD width needs to suit into 64 bit ExtMemWord for now"
#pad to machine word
if len(mem[memInd]) < lenExtMemWord:
mem[memInd] = (
'0' * (lenExtMemWord - len(mem[memInd]))) + mem[memInd]
for b in range(lenExtMemWord / 8):
subByte = mem[memInd][lenExtMemWord -
(b + 1) * 8:lenExtMemWord - b * 8]
outFile.write(struct.pack("B", int(subByte, 2)))
else:
weightBin = bitstring.Bits(
uint=mem[memInd],
length=lenExtMemWord).unpack("bin:" +
str(lenExtMemWord))[0]
#write byte by byte
for b in range(lenExtMemWord / 8):
subByte = weightBin[lenExtMemWord -
(b + 1) * 8:lenExtMemWord - b * 8]
outFile.write(struct.pack("B", int(subByte, 2)))
outFile.close()
def _unpack_imu_channel(self, packet, scale=1):
"""Decode data packet of the accelerometer and gyro (imu) channels.
Each packet is encoded with a 16bit timestamp followed by 9 samples
with a 16 bit resolution.
"""
bit_decoder = bitstring.Bits(bytes=packet)
pattern = "uint:16,int:16,int:16,int:16,int:16, \
int:16,int:16,int:16,int:16,int:16"
data = bit_decoder.unpack(pattern)
packet_index = data[0]
samples = [
[
scale * data[index], # x
scale * data[index + 1], # y
scale * data[index + 2] # z
] for index in [1, 4, 7]
]
# samples is a list with 3 samples
# each sample is a list with [x, y, z]
return packet_index, samples
def parse(package, offset):
package_bits = bitstring.Bits(package)
name, offset = parse_name(package, offset, '')
r_type = package_bits[offset:offset + 16].uint
offset += 16
r_class = package_bits[offset:offset + 16].uint
offset += 16
ttl = package_bits[offset:offset + 32].uint
offset += 32
date_length = package_bits[offset:offset + 16].uint
offset += 16
prime_name_server, offset = parse_name(package, offset, '')
resp_auth, offset = parse_name(package, offset, '')
serial_number = package_bits[offset:offset + 32].uint
offset += 32
refresh_interval = package_bits[offset:offset + 32].uint
offset += 32
retry_interval = package_bits[offset:offset + 32].uint
offset += 32
expire_limit = package_bits[offset:offset + 32].uint
offset += 32
minimum_ttl = package_bits[offset:offset + 32].uint
offset += 32
return DNSAuthority(name, r_type, r_class, ttl, date_length,
prime_name_server, resp_auth, serial_number,
refresh_interval, retry_interval, expire_limit,
minimum_ttl), offset
def _bitarray_to_message(barr):
"""Decodes a bitarray with length multiple of 5 to a byte message (removing the padded zeros if found)."""
padding_len = len(barr) % 8
if padding_len > 0:
return bitstring.Bits(bin=barr.bin[:-padding_len]).bytes
else:
return barr.bytes
def testReadingLines(self):
s = b"This is a test\nof reading lines\nof text\n"
b = CBS(bytes=s)
n = bitstring.Bits(bytes=b'\n')
self.assertEqual(b.readto(n).bytes, b'This is a test\n')
self.assertEqual(b.readto(n).bytes, b'of reading lines\n')
self.assertEqual(b.readto(n).bytes, b'of text\n')
def _read_header(self, fp):
header_bytes = fp.read(32)
header_bits = bitstring.Bits(bytes=header_bytes)
header_i_bits = ~header_bits
header_i_bytes = header_i_bits.tobytes()
(file_identifier, file_type_identifier, magic_sequence_1,
control_byte_1, magic_sequence_2, total_file_size, control_byte_2,
reserved_sequence_1,
num_items) = struct.unpack('>8sB5sB1sIB9sH', header_i_bytes)
if self.debug:
print(f'file_identifier={file_identifier}')
print(f'file_type_identifier={file_type_identifier}')
print(f'total_file_size={total_file_size}')
print(f'num_items={num_items}')
# validate the control bytes
lsb = total_file_size % 256
assert (lsb + 0x41) % 256 == control_byte_1
assert (lsb + 0xb8) % 256 == control_byte_2
# validate magic sequences
assert magic_sequence_1 == b'\x00\x10\x00\x10\x00'
assert magic_sequence_2 == b'\x01'
return num_items
def _decode_bitstring(self):
""" Decode a 'bitstring' object from a 'png' or 'bmp' image
Returns:
bitstring -- binary representation of decoded file
"""
def image_loop(end):
""" Loop through image pixels to obtain 'bitstring' object
Keyword arguments:
end -- How many bits to decode
Returns:
str -- binary
"""
data = ''
current_length = 0
for row in range(self.width):
for col in range(self.height):
for cha in range(self.channels):
if current_length == end:
return data
data += str(self._get_lsb(self.pixels[row, col][cha]))
current_length += 1
bstring_length = ((int(image_loop(32), 2)) + 32)
bstring = image_loop(bstring_length)
return bitstring.Bits('0b' + bstring[32:])
def encode():
st = bitstring.ConstBitStream(filename=sys.argv[2])
f2 = open(sys.argv[3], 'w')
first_code = True
def write_b(b):
nonlocal first_code
nonlocal f2
if first_code:
f2.write(b)
first_code = False
else:
f2.write(' ' + b)
while True:
try:
a = st.read(18).uint
b = num2word[a]
write_b(b)
except bitstring.ReadError:
tail = st[st.pos:] + '0b1'
if tail.len < 18:
tail += bitstring.Bits(18 - tail.len)
b = num2word[tail.uint]
write_b(b)
break
f2.close()
def gen_bin_data(self, trace):
"""Generate the raw binary data for compression"""
linearized = spintolinear.linearize_frames(trace, self.layout) + 1
if self.packingType == "bit":
return bitstring.Bits(linearized).tobytes()
else:
return linearized.tobytes()
def _to_ecmdDataBuffer(buf, defwidth=64):
if isinstance(buf, _int_types):
# negative numbers in Python start with infinite one bits, so strip off infinity minus 64 ;)
buf = buf & ((1 << defwidth) - 1)
ecmd_buf = ecmd.ecmdDataBuffer(defwidth)
if defwidth == 64:
ecmd_buf.setDoubleWord(0, buf)
elif defwidth == 32:
ecmd_buf.setWord(0, buf)
else:
raise NotImplementedError()
return ecmd_buf
if isinstance(buf, bitstring.Bits):
ecmd_buf = ecmd.ecmdDataBuffer(len(buf))
if len(buf):
buf_bytes = bytearray(buf.tobytes())
ecmd_buf.memCopyIn(buf_bytes, len(buf_bytes))
return ecmd_buf
if isinstance(buf, _str_types):
bits = bitstring.Bits(buf)
return _to_ecmdDataBuffer(bits)
return buf
def parse(self, bitstrm):
numbits = len(self.bin_format)
if self.arch.instruction_endness == 'Iend_LE':
# This arch stores its instructions in memory endian-flipped compared to the ISA.
# To enable natural lifter-writing, we let the user write them like in the manual, and correct for
# endness here.
instr_bits = bitstring.Bits(uint=bitstrm.peek("uintle:%d" %
numbits),
length=numbits).bin
else:
instr_bits = bitstrm.peek("bin:%d" % numbits)
data = {c: '' for c in self.bin_format if c in string.ascii_letters}
for c, b in zip(self.bin_format, instr_bits):
if c in '01':
if b != c:
raise ParseError(
'Mismatch between format bit %c and instruction bit %c'
% (c, b))
elif c in string.ascii_letters:
data[c] += b
else:
raise ValueError('Invalid bin_format character %c' % c)
# Hook here for extra matching functionality
if hasattr(self, 'match_instruction'):
# Should raise if it's not right
self.match_instruction(data, bitstrm)
# Use up the bits once we're sure it's right
self.rawbits = bitstrm.read('hex:%d' % numbits)
# Hook here for extra parsing functionality (e.g., trailers)
if hasattr(self, '_extra_parsing'):
data = self._extra_parsing(data, bitstrm)
return data
def parse_from(data):
bit_data = bitstring.Bits(data)
# current_index = 0
header = CacheParser.parse_header(bit_data)
current_index = 96
queries = []
answers = []
authority_answers = []
additional_answers = []
for i in range(header["Questions"]):
query, index = CacheParser.parse_query(bit_data, current_index)
queries.append(query)
current_index = index
for i in range(header["Answers"]):
answer, index = CacheParser.parse_answer(bit_data, current_index)
answers.append(answer)
current_index = index
for i in range(header["Authority"]):
authority_answer, index = CacheParser.parse_answer(
bit_data, current_index)
authority_answers.append(authority_answer)
current_index = index
for i in range(header["Additional"]):
additional_answer, index = CacheParser.parse_answer(
bit_data, current_index)
additional_answers.append(additional_answer)
current_index = index
return header, queries, answers, authority_answers, additional_answers
def decode():
f1 = open(sys.argv[2], 'r', encoding='latin1')
f2 = open(sys.argv[3], 'wb')
st = bitstring.BitArray()
cw = ''
while True:
buf = f1.read(512)
for c in buf:
b = ord(c.upper())
if (b >= ord('A')) and (b <= ord('Z')):
cw += c.upper()
if len(cw) == 5:
if cw not in word2num:
print('Wrong codeword: ' + cw)
exit(2)
if st.len >= 4096:
st[:4096].tofile(f2)
del st[:4096]
st.append(bitstring.Bits(uint=word2num[cw], length=18))
cw = ''
if len(buf) != 512:
break
st[:st.rfind('0b1')[0]].tofile(f2)
f1.close()
f2.close()
def parse(self, bitstrm):
beforebits = bitstrm.bitpos
numbits = len(self.bin_format)
if self.irsb_c.irsb.arch.memory_endness == 'Iend_LE':
# Get it out little endian. I hate this.
instr_bits = bitstring.Bits(uint=bitstrm.peek("uintle:%d" %
numbits),
length=numbits).bin
else:
instr_bits = bitstrm.peek("bin:%d" % numbits)
data = {c: '' for c in self.bin_format if c in string.ascii_letters}
for c, b in zip(self.bin_format, instr_bits):
if c in '01':
if b != c:
raise ParseError(
'Mismatch between format bit %c and instruction bit %c'
% (c, b))
elif c in string.ascii_letters:
data[c] += b
else:
raise ValueError('Invalid bin_format character %c' % c)
# Hook here for extra matching functionality
if hasattr(self, 'match_instruction'):
# Should raise if it's not right
self.match_instruction(data, bitstrm)
# Use up the bits once we're sure it's right
self.rawbits = bitstrm.read('hex:%d' % numbits)
# Hook here for extra parsing functionality (e.g., trailers)
if hasattr(self, '_extra_parsing'):
data = self._extra_parsing(data, bitstrm)
afterbits = bitstrm.bitpos
self.bitwidth = afterbits - beforebits
return data
def read(self):
'''Read data from user read register
FPGA shall be configured with an appropriate bitstream that implements 'jtag_register_read' module using Xilinx BSCAN_SPARTAN6 primitive
Xilinx USER4 instruction is used
Other TAPs in JTAG chain are put in bypass and their bypass registers are loaded with zeros
Parameter:
None
Return:
None
'''
# logger.debug('{description}, register read')
# Reset TAP and advance TAP to Shift-IR state
self.owner.jtag_advance(tms=bitstring.Bits('0b00110, 0b11111'))
# Write USER4 instruction and advance TAP to Exit1-IR state
self.owner.jtag_shift(data=self.ir_before +
self.instructions['user4'] + self.ir_after,
length=None,
tms=bitstring.Bits('0b1'))
# Advance TAP to Shift-DR state
self.owner.jtag_advance(tms=bitstring.Bits('0b0011'))
# Shift data through and advance TAP to Exit-DR state
data_r = self.owner.jtag_shift(data=None,
length=self.dr_before.length +
self.read_register.length +
self.dr_after.length,
tms=bitstring.Bits('0b1'))
# Advance TAP to Test-Logic-Reset state
self.owner.jtag_advance(tms=bitstring.Bits('0b1111'))
self.read_register.value = data_r[self.dr_before.
length:self.dr_before.length +
self.read_register.length]
# logger.debug('OK')
return None