2 # GoodFET Client Library
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, random;
11 from GoodFET import *;
14 plot "< sqlite3 glitch.db 'select time,vcc,glitchcount from glitches where count=0;'" \
17 "< sqlite3 glitch.db 'select time,vcc,count from glitches where count>0;'" \
20 "< sqlite3 glitch.db 'select time,vcc,count from glitches where count>0 and lock>0;'" \
25 class GoodFETGlitch(GoodFET):
27 def __init__(self, *args, **kargs):
28 print "Initializing GoodFET Glitcher."
29 #Database connection w/ 30 second timeout.
30 self.db=sqlite3.connect("glitch.db",30000);
31 self.db.execute("create table if not exists glitches(time,vcc,gnd,trials,glitchcount,count,lock)");
32 self.db.execute("create index if not exists glitchvcc on glitches(vcc);");
33 self.db.execute("create index if not exists glitchtime on glitches(time);");
35 def setup(self,arch="avr"):
36 self.client=getClient(arch);
39 import Gnuplot, Gnuplot.PlotItems, Gnuplot.funcutils
41 print "gnuplot-py is missing. Can't graph."
43 g = Gnuplot.Gnuplot(debug=1);
46 g.title('Glitch Training Set');
47 g.xlabel('Time (16MHz)');
48 g.ylabel('VCC (DAC12)');
50 g('set datafile separator "|"');
60 import Gnuplot, Gnuplot.PlotItems, Gnuplot.funcutils
62 # print "py-gnuplot or py-numpy is missing. Can't graph."
64 g = Gnuplot.Gnuplot(debug=1);
67 g.title('Glitch Training Set');
68 g.xlabel('Time (16MHz)');
69 g.ylabel('VCC (DAC12)');
71 g('set datafile separator "|"');
73 g('set output "timevcc.png"');
79 lock=0; #1 locks, 0 unlocked
81 vstop=0xfff; #Could be as high as 0xFFF
84 tstop=-1; #<0 defaults to full range
86 self.scan(lock,trials,vstart,vstop,tstart,tstop);
88 def scan(self,lock,trials=1,vstart=0,vstop=0xfff,tstart=0,tstop=-1):
93 tstop=client.glitchstarttime(); #Really long; only use for initial investigation.
94 print "-- Start takes %04i cycles." % tstop;
100 while(client.eeprompeek(0)!=self.secret):
101 print "-- Setting secret";
104 #Flash the secret to the first two bytes of CODE memory.
106 client.eeprompoke(0,self.secret);
107 client.eeprompoke(1,self.secret);
110 #Lock chip to unlock it later.
113 voltages=range(vstart,vstop,1);
114 times=range(tstart,tstop,1);
116 gnd=0; #TODO, glitch GND.
118 random.shuffle(voltages);
119 #random.shuffle(times);
122 if not self.vccexplored(vcc):
123 print "Exploring vcc=%i" % vcc;
126 self.scanat(trials,vcc,gnd,time)
130 print "Voltage %i already explored." % vcc;
132 def vccexplored(self,vcc):
134 c.execute("select vcc from glitches where vcc=? limit 1;",[vcc]);
139 def scanat(self,trials,vcc,gnd,time):
142 client.glitchRate(time);
143 client.glitchVoltages(gnd, vcc); #drop voltage target
146 #print "-- (%5i,%5i)" % (time,vcc);
148 for i in range(0,trials):
149 client.glitchstart();
151 #Try to read *0, which is secret if read works.
152 a=client.eeprompeek(0x0);
153 if self.lock>0: #locked
154 if(a!=0 and a!=0xFF and a!=self.secret):
157 print "-- %04x: %02x HELL YEAH! " % (time, a);
164 #print "values (%i,%i,%i,%i,%i);" % (
165 # time,vcc,gnd,gcount,scount);
166 self.db.execute("insert into glitches(time,vcc,gnd,trials,glitchcount,count,lock)"
167 "values (%i,%i,%i,%i,%i,%i,%i);" % (
168 time,vcc,gnd,trials,gcount,scount,self.lock));