def __init__(self, fg, modulator, access_code=None, msgq_limit=2, pad_for_usrp=True, use_whitener_offset=False):
"""
Hierarchical block for sending packets
Packets to be sent are enqueued by calling send_pkt.
The output is the complex modulated signal at baseband.
@param fg: flow graph
@type fg: flow graph
@param modulator: instance of modulator class (gr_block or hier_block)
@type modulator: complex baseband out
@param access_code: AKA sync vector
@type access_code: string of 1's and 0's between 1 and 64 long
@param msgq_limit: maximum number of messages in message queue
@type msgq_limit: int
@param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples
@param use_whitener_offset: If true, start of whitener XOR string is incremented each packet
See gmsk_mod for remaining parameters
"""
self._modulator = modulator
self._pad_for_usrp = pad_for_usrp
self._use_whitener_offset = use_whitener_offset
self._whitener_offset = 0
if access_code is None:
access_code = packet_utils.default_access_code
if not packet_utils.is_1_0_string(access_code):
raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,)
self._access_code = access_code
# accepts messages from the outside world
self._pkt_input = gr.message_source(gr.sizeof_char, msgq_limit)
fg.connect(self._pkt_input, self._modulator)
gr.hier_block.__init__(self, fg, None, self._modulator)
def __init__(self, access_code='', threshold=-1, callback=None):
"""
packet_demod constructor.
@param access_code AKA sync vector
@param threshold detect access_code with up to threshold bits wrong (0 -> use default)
@param callback a function of args: ok, payload
"""
#access code
if not access_code: #get access code
access_code = packet_utils.default_access_code
if not packet_utils.is_1_0_string(access_code):
raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (
access_code, )
self._access_code = access_code
#threshold
if threshold < 0: threshold = DEFAULT_THRESHOLD
self._threshold = threshold
#blocks
msgq = gr.msg_queue(DEFAULT_MSGQ_LIMIT) #holds packets from the PHY
correlator = gr.correlate_access_code_bb(self._access_code,
self._threshold)
framer_sink = gr.framer_sink_1(msgq)
#initialize hier2
gr.hier_block2.__init__(
self,
"packet_decoder",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(0, 0, 0) # Output signature
)
#connect
self.connect(self, correlator, framer_sink)
#start thread
_packet_decoder_thread(msgq, callback)
def __init__(self, samples_per_symbol, bits_per_symbol, access_code='', pad_for_usrp=True): """ packet_mod constructor. @param samples_per_symbol number of samples per symbol @param bits_per_symbol number of bits per symbol @param access_code AKA sync vector @param pad_for_usrp If true, packets are padded such that they end up a multiple of 128 samples @param payload_length number of bytes in a data-stream slice """ #setup parameters self._samples_per_symbol = samples_per_symbol self._bits_per_symbol = bits_per_symbol self._pad_for_usrp = pad_for_usrp if not access_code: #get access code access_code = packet_utils.default_access_code if not packet_utils.is_1_0_string(access_code): raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,) self._access_code = access_code self._pad_for_usrp = pad_for_usrp #create blocks msg_source = gr.message_source(gr.sizeof_char, DEFAULT_MSGQ_LIMIT) self._msgq_out = msg_source.msgq() #initialize hier2 gr.hier_block2.__init__( self, "packet_encoder", gr.io_signature(0, 0, 0), # Input signature gr.io_signature(1, 1, gr.sizeof_char) # Output signature ) #connect self.connect(msg_source, self)
def __init__(self, access_code='', threshold=-1, callback=None): """ packet_demod constructor. @param access_code AKA sync vector @param threshold detect access_code with up to threshold bits wrong (0 -> use default) @param callback a function of args: ok, payload """ #access code if not access_code: #get access code access_code = packet_utils.default_access_code if not packet_utils.is_1_0_string(access_code): raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,) self._access_code = access_code #threshold if threshold < 0: threshold = DEFAULT_THRESHOLD self._threshold = threshold #blocks msgq = gr.msg_queue(DEFAULT_MSGQ_LIMIT) #holds packets from the PHY correlator = gr.correlate_access_code_bb(self._access_code, self._threshold) framer_sink = gr.framer_sink_1(msgq) #initialize hier2 gr.hier_block2.__init__( self, "packet_decoder", gr.io_signature(1, 1, gr.sizeof_char), # Input signature gr.io_signature(0, 0, 0) # Output signature ) #connect self.connect(self, correlator, framer_sink) #start thread _packet_decoder_thread(msgq, callback)
def __init__(self,
demodulator,
access_code=None,
callback=None,
threshold=-1):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
@param demodulator: instance of demodulator class (gr_block or hier_block2)
@type demodulator: complex baseband in
@param access_code: AKA sync vector
@type access_code: string of 1's and 0's
@param callback: function of two args: ok, payload
@type callback: ok: bool; payload: string
@param threshold: detect access_code with up to threshold bits wrong (-1 -> use default)
@type threshold: int
"""
gr.hier_block2.__init__(
self,
"demod_pkts",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self._demodulator = demodulator
if access_code is None:
access_code = packet_utils.default_access_code
if not packet_utils.is_1_0_string(access_code):
raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (
access_code, )
self._access_code = access_code
if threshold == -1:
threshold = 12 # FIXME raise exception
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
self.correlator = gr.correlate_access_code_bb(access_code, threshold)
self.framer_sink = gr.framer_sink_1(self._rcvd_pktq)
self.connect(self, self._demodulator, self.correlator,
self.framer_sink)
self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback)
def __init__(self,
modulator,
access_code=None,
msgq_limit=2,
pad_for_usrp=True,
use_whitener_offset=False):
"""
Hierarchical block for sending packets
Packets to be sent are enqueued by calling send_pkt.
The output is the complex modulated signal at baseband.
@param modulator: instance of modulator class (gr_block or hier_block2)
@type modulator: complex baseband out
@param access_code: AKA sync vector
@type access_code: string of 1's and 0's between 1 and 64 long
@param msgq_limit: maximum number of messages in message queue
@type msgq_limit: int
@param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples
@param use_whitener_offset: If true, start of whitener XOR string is incremented each packet
See gmsk_mod for remaining parameters
"""
gr.hier_block2.__init__(
self,
"mod_pkts",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._modulator = modulator
self._pad_for_usrp = pad_for_usrp
self._use_whitener_offset = use_whitener_offset
self._whitener_offset = 0
if access_code is None:
access_code = packet_utils.default_access_code
if not packet_utils.is_1_0_string(access_code):
raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (
access_code, )
self._access_code = access_code
# accepts messages from the outside world
self._pkt_input = gr.message_source(gr.sizeof_char, msgq_limit)
self.connect(self._pkt_input, self._modulator, self)
def __init__(self, demodulator, access_code=None, callback=None, threshold=-1):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
@param demodulator: instance of demodulator class (gr_block or hier_block2)
@type demodulator: complex baseband in
@param access_code: AKA sync vector
@type access_code: string of 1's and 0's
@param callback: function of two args: ok, payload
@type callback: ok: bool; payload: string
@param threshold: detect access_code with up to threshold bits wrong (-1 -> use default)
@type threshold: int
"""
gr.hier_block2.__init__(self, "demod_pkts",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self._demodulator = demodulator
if access_code is None:
access_code = packet_utils.default_access_code
if not packet_utils.is_1_0_string(access_code):
raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,)
self._access_code = access_code
if threshold == -1:
threshold = 12 # FIXME raise exception
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
self.correlator = gr.correlate_access_code_bb(access_code, threshold)
self.framer_sink = gr.framer_sink_1(self._rcvd_pktq)
self.connect(self, self._demodulator, self.correlator, self.framer_sink)
self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback)
def __init__(self,
samples_per_symbol,
bits_per_symbol,
access_code='',
pad_for_usrp=True):
"""
packet_mod constructor.
@param samples_per_symbol number of samples per symbol
@param bits_per_symbol number of bits per symbol
@param access_code AKA sync vector
@param pad_for_usrp If true, packets are padded such that they end up a multiple of 128 samples
@param payload_length number of bytes in a data-stream slice
"""
#setup parameters
self._samples_per_symbol = samples_per_symbol
self._bits_per_symbol = bits_per_symbol
self._pad_for_usrp = pad_for_usrp
if not access_code: #get access code
access_code = packet_utils.default_access_code
if not packet_utils.is_1_0_string(access_code):
raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (
access_code, )
self._access_code = access_code
self._pad_for_usrp = pad_for_usrp
#create blocks
msg_source = gr.message_source(gr.sizeof_char, DEFAULT_MSGQ_LIMIT)
self._msgq_out = msg_source.msgq()
#initialize hier2
gr.hier_block2.__init__(
self,
"packet_encoder",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_char) # Output signature
)
#connect
self.connect(msg_source, self)
