| 1 | #!/usr/bin/env python |
|---|
| 2 | #Transmission and reception, one ata a time on the same antena |
|---|
| 3 | |
|---|
| 4 | from gnuradio import gr, gru, modulation_utils |
|---|
| 5 | from gnuradio import eng_notation |
|---|
| 6 | ##########spectrum sense specific imports |
|---|
| 7 | from gnuradio import optfir, window |
|---|
| 8 | from gnuradio import usrp |
|---|
| 9 | #from gnuradio.eng_option import eng_option |
|---|
| 10 | #from usrpm import usrp_dbid |
|---|
| 11 | ########## |
|---|
| 12 | from gnuradio.eng_option import eng_option |
|---|
| 13 | from optparse import OptionParser |
|---|
| 14 | from numpy import random |
|---|
| 15 | import random, time, struct, sys, math |
|---|
| 16 | |
|---|
| 17 | # from current dir |
|---|
| 18 | from transmit_path import transmit_path |
|---|
| 19 | from receive_path import receive_path |
|---|
| 20 | #import spec_sense_path |
|---|
| 21 | |
|---|
| 22 | global sync_status |
|---|
| 23 | sync_status = False #default value is "False"... |
|---|
| 24 | global mode |
|---|
| 25 | #Defining modes of operation |
|---|
| 26 | #sync = synchronizing with other node before data transfer |
|---|
| 27 | #traffic = data transfer |
|---|
| 28 | #spec_sense = sensing spectrum for primary user |
|---|
| 29 | mode = "sync" #default mode of operation... |
|---|
| 30 | class my_top_block(gr.top_block): |
|---|
| 31 | |
|---|
| 32 | def __init__(self, mod_class, demod_class, |
|---|
| 33 | rx_callback, options_tx,options_rx): |
|---|
| 34 | |
|---|
| 35 | gr.top_block.__init__(self) |
|---|
| 36 | self.rxpath = receive_path(demod_class, rx_callback, options_rx) |
|---|
| 37 | self.txpath = transmit_path(mod_class, options_tx) |
|---|
| 38 | |
|---|
| 39 | ########connect for the spectrum sense######### |
|---|
| 40 | #default_min_freq = 462.4825e6 #80 Khz to the left of channel 1 (462.5625e6) in frs band |
|---|
| 41 | #default_max_freq = 462.6425e6 #80 Khz to the right of channel 1 (462.5625e6) in frs band |
|---|
| 42 | #self.sp_sense_path = spec_sense_path.spec_sense_top_block(default_min_freq,default_min_freq) |
|---|
| 43 | #self.connect(self.sp_sense_path.u, self.sp_sense_path.s2v, self.sp_sense_path.fft, self.sp_sense_path.c2mag, self.sp_sense_path.stats) |
|---|
| 44 | |
|---|
| 45 | self.connect(self.txpath); |
|---|
| 46 | self.connect(self.rxpath); |
|---|
| 47 | |
|---|
| 48 | |
|---|
| 49 | #//////main////// |
|---|
| 50 | |
|---|
| 51 | global n_rcvd, n_right,hop_freq |
|---|
| 52 | |
|---|
| 53 | def main(): |
|---|
| 54 | global n_rcvd, n_right,sync_status,mode,hop_freq |
|---|
| 55 | n_rcvd = 0 |
|---|
| 56 | n_right = 0 |
|---|
| 57 | def send_pkt(self, payload='', eof=False): |
|---|
| 58 | return self.txpath.send_pkt(payload, eof) |
|---|
| 59 | |
|---|
| 60 | def rx_callback(ok, payload): |
|---|
| 61 | |
|---|
| 62 | |
|---|
| 63 | #print "inside rx callback" |
|---|
| 64 | global n_rcvd, n_right, sync_status,mode,hop_freq |
|---|
| 65 | tb.rxpath.min_freq = hop_freq - 80e3 |
|---|
| 66 | tb.rxpath.max_freq = hop_freq + 80e3 |
|---|
| 67 | tb.rxpath.get_avg_power(10) |
|---|
| 68 | (pktno,) = struct.unpack('!H', payload[0:2]) |
|---|
| 69 | #temp = struct.unpack('!s', payload[3:10]) |
|---|
| 70 | #print "printing the elements of packet",temp,"!!!!!!!!!!!\n" |
|---|
| 71 | if mode == "sync": |
|---|
| 72 | ##################################################### |
|---|
| 73 | (sync_signal,) = struct.unpack('!s', payload[2]) |
|---|
| 74 | (sync_signal_red,) = struct.unpack('!s', payload[3]) #redundant sync bit |
|---|
| 75 | (data_channel,) = struct.unpack('!s', payload[4]) |
|---|
| 76 | (data_channel_red,) = struct.unpack('!s', payload[5]) #redundant channel bit |
|---|
| 77 | #print "printing the elements of packet ",sync_signal," !!!!!!!!!!! ",sync_signal_red," !!!!!\n" |
|---|
| 78 | #print "printing the channel ",data_channel_red," !!!!!!!!!!! ",data_channel_red," !!!!!\n" |
|---|
| 79 | if ok: #== True :# and str(sync_signal) == 'o' and str(sync_signal_red) == 'o': |
|---|
| 80 | #print "inside if" |
|---|
| 81 | if ok: #== True: #str(data_channel) == str(data_channel_red): |
|---|
| 82 | #print "inside if1$$$$$" |
|---|
| 83 | if str(data_channel) == str(ch): |
|---|
| 84 | #print "inside if2" |
|---|
| 85 | sync_status = True |
|---|
| 86 | #tb.stop() |
|---|
| 87 | #print "after tb stop ans sync status is ",sync_status," sync status\n" |
|---|
| 88 | #print "received a sync packet on channel %s\n" %(data_channel) |
|---|
| 89 | #data = 'o'+'o'+str(data_channel)+str(data_channel) |
|---|
| 90 | #print "sending this data",data,"@@@@@\n" |
|---|
| 91 | #pktno=0 |
|---|
| 92 | #ack_payload = struct.pack('!H', pktno & 0xffff) + data |
|---|
| 93 | #print "printing the ack packet",ack_payload,"$$$$$\n" |
|---|
| 94 | #k=0 |
|---|
| 95 | #while k < 10000: |
|---|
| 96 | #print "inside while" |
|---|
| 97 | #send_pkt(tb,ack_payload) #sending back the acknowledgement |
|---|
| 98 | #k=k+1 |
|---|
| 99 | ##################################################### |
|---|
| 100 | |
|---|
| 101 | n_rcvd += 1 |
|---|
| 102 | if ok: |
|---|
| 103 | n_right += 1 |
|---|
| 104 | |
|---|
| 105 | #print "ok = %5s pktno = %4d n_rcvd = %4d n_right = %4d" % ( |
|---|
| 106 | #ok, pktno, n_rcvd, n_right) |
|---|
| 107 | |
|---|
| 108 | mods = modulation_utils.type_1_mods() |
|---|
| 109 | demods = modulation_utils.type_1_demods() |
|---|
| 110 | |
|---|
| 111 | #setting up the tx options parser |
|---|
| 112 | parser_tx = OptionParser(option_class=eng_option, conflict_handler="resolve") |
|---|
| 113 | expert_grp_tx = parser_tx.add_option_group("Expert_tx") |
|---|
| 114 | print "printing Expert_tx group",expert_grp_tx,"printing Expert_tx group" |
|---|
| 115 | parser_tx.add_option("-m", "--modulation", type="choice", choices=mods.keys(), |
|---|
| 116 | default='gmsk', |
|---|
| 117 | help="Select modulation from: %s [default=%%default]" |
|---|
| 118 | % (', '.join(mods.keys()),)) |
|---|
| 119 | |
|---|
| 120 | parser_tx.add_option("-s", "--size", type="eng_float", default=1500, |
|---|
| 121 | help="set packet size [default=%default]") |
|---|
| 122 | parser_tx.add_option("-M", "--megabytes", type="eng_float", default=1.0, |
|---|
| 123 | help="set megabytes to transmit [default=%default]") |
|---|
| 124 | parser_tx.add_option("","--discontinuous", action="store_true", default=False, |
|---|
| 125 | help="enable discontinous transmission (bursts of 5 packets)") |
|---|
| 126 | parser_tx.add_option("","--from-file", default=None, |
|---|
| 127 | help="use file for packet contents") |
|---|
| 128 | print "printing parser_tx",parser_tx,"printing parser_tx" |
|---|
| 129 | transmit_path.add_options(parser_tx, expert_grp_tx) |
|---|
| 130 | |
|---|
| 131 | for mod in mods.values(): |
|---|
| 132 | mod.add_options(expert_grp_tx) |
|---|
| 133 | |
|---|
| 134 | (options_tx, args_tx) = parser_tx.parse_args () |
|---|
| 135 | |
|---|
| 136 | if len(args_tx) != 0: |
|---|
| 137 | parser_tx.print_help() |
|---|
| 138 | sys.exit(1) |
|---|
| 139 | ############# Setting some default values for tx side of the block |
|---|
| 140 | options_tx.tx_freq = 462.5625e6 |
|---|
| 141 | options_tx.samples_per_symbol = 2 |
|---|
| 142 | options_tx.modulation = 'dbpsk' |
|---|
| 143 | options_tx.fusb_block_size = 4096 |
|---|
| 144 | options_tx.fusb_nblocks = 16 |
|---|
| 145 | options_tx.bitrate = 0.0125e6 |
|---|
| 146 | ############# |
|---|
| 147 | if options_tx.tx_freq is None: |
|---|
| 148 | sys.stderr.write("You must specify -f FREQ or --freq FREQ\n") |
|---|
| 149 | parser_tx.print_help(sys.stderr) |
|---|
| 150 | sys.exit(1) |
|---|
| 151 | |
|---|
| 152 | if options_tx.from_file is not None: |
|---|
| 153 | source_file = open(options_tx.from_file, 'r') |
|---|
| 154 | print "printing modulation type",mods[options_tx.modulation],"**" |
|---|
| 155 | # build the graph |
|---|
| 156 | print "printing tx options",options_tx,"&&&&\n" |
|---|
| 157 | #tb = my_top_block(mods[options_tx.modulation], options_tx) |
|---|
| 158 | |
|---|
| 159 | #r = gr.enable_realtime_scheduling() |
|---|
| 160 | #if r != gr.RT_OK: |
|---|
| 161 | # print "Warning: failed to enable realtime scheduling" |
|---|
| 162 | |
|---|
| 163 | #setting up rx options parser |
|---|
| 164 | |
|---|
| 165 | # Create Options Parser: |
|---|
| 166 | parser_rx = OptionParser (option_class=eng_option, conflict_handler="resolve") |
|---|
| 167 | print "printing parser_rx",parser_rx,"!!!!!\n" |
|---|
| 168 | print "after option parser" |
|---|
| 169 | expert_grp_rx = parser_rx.add_option_group("Expert_rx") |
|---|
| 170 | print "printing expert group rx",expert_grp_rx,"@@@@\n" |
|---|
| 171 | parser_rx.add_option("-m", "--modulation", type="choice", choices=demods.keys(), |
|---|
| 172 | default='gmsk', |
|---|
| 173 | help="Select modulation from: %s [default=%%default]" |
|---|
| 174 | % (', '.join(demods.keys()),)) |
|---|
| 175 | print "inside rx option parser" |
|---|
| 176 | receive_path.add_options(parser_rx, expert_grp_rx) |
|---|
| 177 | |
|---|
| 178 | for mod in demods.values(): |
|---|
| 179 | mod.add_options(expert_grp_rx) |
|---|
| 180 | |
|---|
| 181 | (options_rx, args_rx) = parser_rx.parse_args () |
|---|
| 182 | |
|---|
| 183 | if len(args_rx) != 0: |
|---|
| 184 | parser_rx.print_help(sys.stderr) |
|---|
| 185 | sys.exit(1) |
|---|
| 186 | ############# Setting some default values for rx side of the block |
|---|
| 187 | options_rx.rx_freq = 462.5625e6 #setting default rx_freq value |
|---|
| 188 | options_rx.samples_per_symbol = 2 |
|---|
| 189 | options_rx.modulation = 'dbpsk' |
|---|
| 190 | options_rx.fusb_block_size = 4096 |
|---|
| 191 | options_rx.fusb_nblocks = 16 |
|---|
| 192 | options_rx.bitrate = 0.0125e6 |
|---|
| 193 | ############# |
|---|
| 194 | if options_rx.rx_freq is None: |
|---|
| 195 | sys.stderr.write("You must specify -f FREQ or --freq FREQ\n") |
|---|
| 196 | parser_rx.print_help(sys.stderr) |
|---|
| 197 | sys.exit(1) |
|---|
| 198 | print "printing rx options",options_rx,"&&&&\n" |
|---|
| 199 | |
|---|
| 200 | |
|---|
| 201 | |
|---|
| 202 | ######################## adding another top block for usrp spectrum sense ######################## |
|---|
| 203 | #This is not needed anymore |
|---|
| 204 | #trials = 10 |
|---|
| 205 | |
|---|
| 206 | #tb_spec_sense = spec_sense_top_block(default_min_freq,default_min_freq) |
|---|
| 207 | #tb_spec_sense.subdev.select_rx_antenna('RX2') |
|---|
| 208 | #tb_spec_sense.start() # start executing flow graph in another thread... |
|---|
| 209 | #avg = tb_spec_sense.get_avg_power(trials) |
|---|
| 210 | #print "printing the average power ",avg, "\n" |
|---|
| 211 | #tb_spec_sense.stop() |
|---|
| 212 | |
|---|
| 213 | |
|---|
| 214 | ################################################################################################## |
|---|
| 215 | |
|---|
| 216 | # build the graph |
|---|
| 217 | |
|---|
| 218 | tb = my_top_block(mods[options_tx.modulation], |
|---|
| 219 | demods[options_rx.modulation], |
|---|
| 220 | rx_callback,options_tx, |
|---|
| 221 | options_rx) |
|---|
| 222 | r = gr.enable_realtime_scheduling() |
|---|
| 223 | if r != gr.RT_OK: |
|---|
| 224 | print "Warning: failed to enable realtime scheduling" |
|---|
| 225 | |
|---|
| 226 | tb.start() |
|---|
| 227 | #tb.rxpath.get_avg_power(10) #10 is the number of fft frames that we are looking at to determine the average power |
|---|
| 228 | # generate and send packets |
|---|
| 229 | #print "printing megamytes",options_tx.megabytes," $$$$\n" |
|---|
| 230 | |
|---|
| 231 | #n = 0 |
|---|
| 232 | #pktno = 0 |
|---|
| 233 | #pkt_size = int(options_tx.size) |
|---|
| 234 | #options_tx.megabytes = 0.000048 |
|---|
| 235 | |
|---|
| 236 | #options_tx.size = 6 #2 bytes for packet size,2 bytes for the synchronization request(including redundant bit) and 2 bits to specify the channel number(including redundant bit) |
|---|
| 237 | |
|---|
| 238 | |
|---|
| 239 | myfile = file("logfile.txt", 'w') |
|---|
| 240 | myfile.write("") |
|---|
| 241 | #sending sync packet-format |
|---|
| 242 | global ch |
|---|
| 243 | check =True |
|---|
| 244 | #ch = random.randint(1, 7)#which channel to send information on...this is the second data packet of the synchronization frame |
|---|
| 245 | #resend = 5; #number of times a batch of sync packets is sent on a channel before trying a different channel |
|---|
| 246 | running = True |
|---|
| 247 | #resend_count= 0 #initializing resend count |
|---|
| 248 | #while running |
|---|
| 249 | if mode == "sync": |
|---|
| 250 | #nbytes = int(1e6 * .0003) |
|---|
| 251 | #nbytes = int(1e6 * .0003) |
|---|
| 252 | nbytes = 6 |
|---|
| 253 | pkt_size = 6 |
|---|
| 254 | print "printing packet size",pkt_size,"pkt size\n" |
|---|
| 255 | while sync_status != True: |
|---|
| 256 | #ch = random.randint(1, 7) |
|---|
| 257 | #ch = int(random.choice('17')) |
|---|
| 258 | #ch = random.randint(6,12) |
|---|
| 259 | ch = 1 |
|---|
| 260 | hop_freq = float(1e6 * (462.5625+(ch-1)*0.025))#setting the centre freq frequency for sending packets |
|---|
| 261 | print "hop freq is ",hop_freq |
|---|
| 262 | |
|---|
| 263 | #hop_freq = float(1e6 * (462.5625+(5-1)*0.05))#setting the centre freq frequency for sending packets |
|---|
| 264 | tb.txpath.set_freq(hop_freq) |
|---|
| 265 | tb.rxpath.set_freq(hop_freq) |
|---|
| 266 | #print "inside while pppp printing sync channel",sync_status," done" |
|---|
| 267 | #if sync_status == "True": |
|---|
| 268 | #print "synchronization done..data channel is found" |
|---|
| 269 | #break |
|---|
| 270 | #else: |
|---|
| 271 | #print "inside else1" |
|---|
| 272 | n = 0 |
|---|
| 273 | pktno = 0 |
|---|
| 274 | print >> myfile, "out" |
|---|
| 275 | while n < nbytes: |
|---|
| 276 | print >> myfile, "inside while" |
|---|
| 277 | if options_tx.from_file is None: |
|---|
| 278 | #data = (pkt_size - 2) * chr(pktno & 0xff) #0xff is 255 |
|---|
| 279 | data = 's'+'s'+str(ch)+str(ch) #adding redundant bits for sync and channel |
|---|
| 280 | #print >> myfile, data |
|---|
| 281 | #print "printing data",data,"****\n" |
|---|
| 282 | else: |
|---|
| 283 | data = source_file.read(pkt_size - 2) |
|---|
| 284 | if data == '': |
|---|
| 285 | break; |
|---|
| 286 | |
|---|
| 287 | payload = struct.pack('!H', pktno & 0xffff) + data |
|---|
| 288 | #print "printing payload",payload,"**\n" |
|---|
| 289 | |
|---|
| 290 | send_pkt(tb,payload) |
|---|
| 291 | #print "printing payload",payload,"**\n" |
|---|
| 292 | n += len(payload) |
|---|
| 293 | sys.stderr.write('.') |
|---|
| 294 | if options_tx.discontinuous and pktno % 5 == 4: |
|---|
| 295 | time.sleep(1) |
|---|
| 296 | pktno += 1 |
|---|
| 297 | #print "before sleeping for 10 seconds and value of resend count is",resend_count |
|---|
| 298 | |
|---|
| 299 | tb.rxpath.min_freq = hop_freq - 80e3 |
|---|
| 300 | tb.rxpath.max_freq = hop_freq + 80e3 |
|---|
| 301 | tb.rxpath.get_avg_power(10) #10 is the number of fft frames that we are looking at to determine the average power |
|---|
| 302 | |
|---|
| 303 | time.sleep(0.05) |
|---|
| 304 | #time.sleep(2) |
|---|
| 305 | #resend_count += 1 |
|---|
| 306 | print "sync channel found! and it is channel ",ch,"\n" |
|---|
| 307 | send_pkt(tb,eof=True) |
|---|
| 308 | #myfile.close() |
|---|
| 309 | tb.wait() |
|---|
| 310 | |
|---|
| 311 | |
|---|
| 312 | |
|---|
| 313 | if __name__ == '__main__': |
|---|
| 314 | try: |
|---|
| 315 | main() |
|---|
| 316 | except KeyboardInterrupt: |
|---|
| 317 | pass |
|---|
| 318 | |
|---|
| 319 | |
|---|
| 320 | |
|---|
| 321 | |
|---|
| 322 | |
|---|
| 323 | |
|---|
| 324 | |
|---|
| 325 | |
|---|
| 326 | |
|---|
| 327 | |
|---|
| 328 | |
|---|
| 329 | |
|---|
| 330 | |
|---|
| 331 | |
|---|
| 332 | |
|---|
| 333 | |
|---|
| 334 | |
|---|
| 335 | |
|---|
| 336 | |
|---|
| 337 | |
|---|
| 338 | |
|---|
| 339 | |
|---|
| 340 | |
|---|
| 341 | |
|---|
| 342 | |
|---|
| 343 | |
|---|
| 344 | |
|---|
| 345 | |
|---|
| 346 | |
|---|
| 347 | |
|---|
| 348 | |
|---|
| 349 | |
|---|
| 350 | |
|---|
| 351 | |
|---|
| 352 | |
|---|
| 353 | |
|---|
| 354 | |
|---|
| 355 | |
|---|
| 356 | |
|---|
| 357 | |
|---|
| 358 | |
|---|
| 359 | |
|---|
| 360 | |
|---|
| 361 | |
|---|
| 362 | |
|---|
| 363 | |
|---|
