2 # GoodFET Chipcon RF Radio Client
4 # (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
6 # This code is being rewritten and refactored. You've been warned!
8 import sys, time, string, cStringIO, struct, glob, serial, os;
10 from GoodFET import GoodFET;
12 class GoodFETCCSPI(GoodFET):
14 CCversions={0x233d: "CC2420",
17 """Move the FET into the CCSPI application."""
18 self.writecmd(self.CCSPIAPP,0x10,0,self.data); #CCSPI/SETUP
20 #Set up the radio for ZigBee
21 self.strobe(0x01); #SXOSCON
22 self.strobe(0x02); #SCAL
23 self.poke(0x11, 0x0AC2); #MDMCTRL0
24 self.poke(0x12, 0x0500); #MDMCTRL1
25 self.poke(0x1C, 0x007F); #IOCFG0
26 self.poke(0x19, 0x01C4); #SECCTRL0, disabling crypto
30 return self.peek(0x1E); #MANFIDL
32 manfidl=self.peek(0x1E);
33 #manfidh=self.peek(0x1f);
35 return "%s" % (self.CCversions[manfidl]);
37 return "Unknown0x%04x" % manfidl;
38 def trans8(self,byte):
39 """Read and write 8 bits by CCSPI."""
40 data=self.CCSPItrans([byte]);
44 """Exchange data by CCSPI."""
46 self.writecmd(self.CCSPIAPP,0x00,len(data),data);
48 def strobe(self,reg=0x00):
49 """Strobes a strobe register, returning the status."""
52 return ord(self.data[0]);
53 def CC_RFST_IDLE(self):
54 """Switch the radio to idle mode, clearing overflows and errors."""
55 self.strobe(0x06); #SRXOFF
57 """Switch the radio to TX mode."""
58 self.strobe(0x04); #0x05 for CCA
60 """Switch the radio to RX mode."""
62 def CC_RFST_CAL(self):
63 """Calibrate strobe the radio."""
65 def CC_RFST(self,state=0x00):
68 def peek(self,reg,bytes=2):
69 """Read a CCSPI Register. For long regs, result is flipped."""
71 #Reg is ORed with 0x40 by the GoodFET.
74 #Automatically calibrate the len.
77 self.writecmd(self.CCSPIAPP,0x02,len(data),data);
80 (ord(self.data[1])<<8)
83 def poke(self,reg,val,bytes=2):
84 """Write a CCSPI Register."""
85 data=[reg,(val>>8)&0xFF,val&0xFF];
86 self.writecmd(self.CCSPIAPP,0x03,len(data),data);
87 if self.peek(reg,bytes)!=val and reg!=0x18:
88 print "Warning, failed to set r%02x=0x%04x, got %02x." %(
91 self.peek(reg,bytes));
95 """Read the status byte."""
96 statusbits={0x80: "?",
97 0x40: "XOSC16M_STABLE",
104 status=self.strobe(0x00);
109 str="%s %s" % (statusbits[i],str);
113 #Radio stuff begins here.
114 def RF_setenc(self,code="802.15.4"):
115 """Set the encoding type."""
118 """Get the encoding type."""
120 def RF_getrate(self):
122 def RF_setrate(self,rate=0):
124 def RF_getsync(self):
125 return self.peek(0x14);
126 def RF_setsync(self,sync=0xa70F):
127 """Set the SYNC preamble.
128 Use 0xA70F for 0xA7."""
129 self.poke(0x14,sync);
132 def RF_setfreq(self,frequency):
133 """Set the frequency in Hz."""
134 mhz=frequency/1000000;
135 fsctrl=0x8000; #self.peek(0x18)&(~0x3FF);
136 fsctrl=fsctrl+int(mhz-2048)
137 self.poke(0x18,fsctrl);
139 def RF_getfreq(self):
140 """Get the frequency in Hz."""
141 fsctrl=self.peek(0x18);
142 mhz=2048+(fsctrl&0x3ff)
144 def RF_setchan(self,channel):
145 if channel < 11 or channel > 26:
146 print "Only 802.15.4 channels 11 to 26 are currently supported.";
148 self.RF_setfreq( ( (channel-11)*5 + 2405 ) * 1000000 );
149 def RF_getsmac(self):
150 """Return the source MAC address."""
152 def RF_setsmac(self,mac):
153 """Set the source MAC address."""
155 def RF_gettmac(self):
156 """Return the target MAC address."""
158 def RF_settmac(self,mac):
159 """Set the target MAC address."""
161 def RF_getrssi(self):
162 """Returns the received signal strenght, with a weird offset."""
163 rssival=self.peek(0x13)&0xFF; #raw RSSI register
165 lastpacket=range(0,0xff);
166 def RF_rxpacket(self):
167 """Get a packet from the radio. Returns None if none is waiting. In
168 order to not require the SFD, FIFO, or FIFOP lines, this
169 implementation works by comparing the buffer to the older
175 self.writecmd(self.CCSPIAPP,0x80,len(data),data);
178 self.lastpacket=buffer;
182 def RF_txpacket(self,packet):
183 """Send a packet through the radio."""
184 self.writecmd(self.CCSPIAPP,0x81,len(packet),packet);
189 def RF_reflexjam(self):
190 """Place the device into reflexive jamming mode."""
192 self.writecmd(self.CCSPIAPP,0xA0,len(data),data);
195 def RF_modulated_spectrum(self):
196 """Hold a carrier wave on the present frequency."""
197 # print "Don't know how to hold a carrier.";
201 # set MDMCTRL1.TX_MODE to 3 0x12 3:2
204 mdmctrl1=self.peek(0x12);
205 #print "mdmctrl1 was %04x" % mdmctrl1;
206 mdmctrl1=mdmctrl1|0x00c0; #MDMCTRL1.TX_MODE = 3
207 self.poke(0x12, mdmctrl1); #MDMCTRL1
209 mdmctrl1=self.peek(0x12);
210 #print "mdmctrl1 is %04x" % mdmctrl1;
212 # http://e2e.ti.com/support/low_power_rf/f/155/t/15914.aspx?PageIndex=2
214 self.strobe(0x02); #STXCAL
215 #print "STXCAL status: %s" % self.status()
218 self.strobe(0x09); #SFLUSHTX
219 #print "SFLUSHTX status: %s" % self.status()
221 self.strobe(0x04); #STXON
222 #print "STXON status: %s" % self.status()
224 def RF_carrier(self):
225 """Hold a carrier wave on the present frequency."""
226 # print "Don't know how to hold a carrier.";
230 # set MDMCTRL1.TX_MODE to 2 or 3 0x12 3:2
231 # set DACTST to 0x1800 0x2E
234 mdmctrl1=self.peek(0x12);
235 #print "mdmctrl1 was %04x" % mdmctrl1;
236 mdmctrl1=mdmctrl1|0x0080;
237 mdmctrl1=mdmctrl1&0x0080; #MDMCTRL1.TX_MODE = 2
238 self.poke(0x12, mdmctrl1); #MDMCTRL1
240 mdmctrl1=self.peek(0x12);
241 #print "mdmctrl1 is %04x" % mdmctrl1;
243 self.poke(0x2E, 0x1800); #DACTST
244 dactst=self.peek(0x2E);
245 #print "dactst is %04x" % dactst;
247 # see above for why this is here
248 self.strobe(0x02); #STXCAL
249 #print "STXCAL status: %s" % self.status()
250 self.strobe(0x09); #SFLUSHTX
251 #print "SFLUSHTX status: %s" % self.status()
253 self.strobe(0x04); #STXON
254 #print "STXON status: %s" % self.status()
256 def RF_promiscuity(self,promiscuous=1):
257 mdmctrl0=self.peek(0x11);
259 mdmctrl0=mdmctrl0&(~0x800);
261 mdmctrl0=mdmctrl0|0x800;
262 self.poke(0x11,mdmctrl0);
264 def RF_autocrc(self,autocrc=1):
265 mdmctrl0=self.peek(0x11);
267 mdmctrl0=mdmctrl0&(~0x0020);
269 mdmctrl0=mdmctrl0|0x0020;
270 self.poke(0x11,mdmctrl0);
273 def RF_setpacketlen(self,len=16):
274 """Set the number of bytes in the expected payload."""
275 #self.poke(0x11,len);
277 def RF_getpacketlen(self):
278 """Set the number of bytes in the expected payload."""
279 #len=self.peek(0x11);
283 def RF_getmaclen(self):
284 """Get the number of bytes in the MAC address."""
285 choices=[0, 3, 4, 5];
286 choice=self.peek(0x03)&3;
287 self.maclen=choices[choice];
289 def RF_setmaclen(self,len):
290 """Set the number of bytes in the MAC address."""
291 choices=["illegal", "illegal", "illegal",
294 self.poke(0x03,choice);
296 def printpacket(self,packet):
300 s="%s %02x" % (s,ord(foo));
303 def printdissect(self,packet):
305 from scapy.all import Dot15d4
307 print "To use packet disection, Scapy must be installed and have the Dot15d4 extension present."
308 print "try: hg clone http://hg.secdev.org/scapy-com";
309 print " sudo ./setup.py install";
310 self.printpacket(packet);
312 scapyd = Dot15d4(packet[1:]);