class AutoTuner():
"""This guesses addresses by searching through packets."""
- #packets=[];
addresses={};
client=None;
- def init(self,goodfet):
+
+ #Limits on search space, because you usually know what you're looking for.
+ rate=False;
+ chan=False;
+ sync=False;
+ def init(self,goodfet,
+ rate=True,chan=True,sync=True):
"""Initializes a link to the GoodFET for autotuning."""
self.client=goodfet;
+ self.rate=rate;
+ self.chan=chan;
+ self.sync=sync;
+ return;
def packetaddr(self,packet):
"""Returns a loaded packet address, including channel and rate."""
addr,count,rate);
return;
tunecount=0;
- def retune(self,freqmod=0x52):
+ def retune(self):
"""Tunes to another channel or preamble looking for the next packet."""
- count=self.tunecount+1;
- self.tunecount=count;
+ count=self.tunecount;
+ self.tunecount=count+1;
#Swap the SYNC value most often.
- sync=0xAA;
- if count&1:
- sync=0x55;
- self.client.RF_setsmac(sync);
- count=(count>>1);
-
- #Then the data rate.
- rate=0;
+ if self.sync:
+ sync=0xAA;
+ if count&1:
+ sync=0x55;
+ self.client.RF_setsmac(sync);
+ count=(count>>1);
- #This swaps between 1Mbps and 2Mbps.
- #TODO add support for 256kbps, if anyone uses it.
- if count&1:
- rate=rate|0x08;
- #print "Setting rate to 0x%02x" % rate;
- if(rate==0x20):
- rate=0x08;
- self.client.poke(0x06,rate);
- count=(count>>2);
+ if self.rate:
+ #Then the data rate.
+ rate=0;
+
+ #This swaps between 1Mbps and 2Mbps.
+ #TODO add support for 256kbps, if anyone uses it.
+ if count&1:
+ rate=rate|0x08;
+ #print "Setting rate to 0x%02x" % rate;
+ if(rate==0x20):
+ rate=0x08;
+ self.client.poke(0x06,rate);
+ count=(count>>1);
+ if self.chan:
+ self.client.poke(0x05,
+ (count+40)&0x7f);
+ print "Tuned to %i MHz" % (
+ self.client.RF_getfreq()
+ /(10**6));
#Grab two packets to clear buffers.
#Should retune only after a few packets to reduce this delay.
packet=client.RF_rxpacket();
#Reversal of transmitter code from nRF_CMD.c of OpenBeacon
#TODO remove all poke() calls.
guesser=AutoTuner();
- guesser.init(client);
+ guesser.init(client,rate=False,sync=False,chan=True);
client.poke(0x00,0x00); #Stop nRF
client.poke(0x01,0x00); #Disable Shockburst
print "sync,mac,r5,r6";
#Now we're ready to get packets.
while 1:
- for foo in range(1,10):
+ #Full second on each packet.
+ start=time.mktime(time.localtime());
+ while (time.mktime(time.localtime())-start) < 5:
packet=None;
while packet==None:
packet=client.RF_rxpacket();
guesser.handle(packet);
- guesser.retune();
+ #print "Retuning."
+ guesser.retune();
sys.stdout.flush();
if(sys.argv[1]=="sniffmskb"):