From f6e88098e3f1bd2d7205c8f948a2dc2a5a780593 Mon Sep 17 00:00:00 2001
From: travisutk <travisutk@12e2690d-a6be-4b82-a7b7-67c4a43b65c8>
Date: Tue, 24 Nov 2009 12:23:40 +0000
Subject: [PATCH] Glitching functions.

git-svn-id: https://svn.code.sf.net/p/goodfet/code/trunk@240 12e2690d-a6be-4b82-a7b7-67c4a43b65c8
---
 client/GoodFET.py  | 27 +++++++++++++++++++++++++++
 client/goodfet.avr | 18 +++++++++++++++++-
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/client/GoodFET.py b/client/GoodFET.py
index da652c3..63e38e9 100755
--- a/client/GoodFET.py
+++ b/client/GoodFET.py
@@ -10,6 +10,9 @@ import sys, time, string, cStringIO, struct, glob, serial, os;
 
 class GoodFET:
     """GoodFET Client Library"""
+    
+    GLITCHAPP=0x71;
+    
     def __init__(self, *args, **kargs):
         self.data=[0];
     def timeout(self):
@@ -104,6 +107,30 @@ class GoodFET:
             else:
                 self.data=self.serialport.read(self.count);
                 return self.data;
+    #Glitching stuff.
+    def glitchAPP(self,app):
+        """Glitch into a device by its application."""
+        self.data=[app&0xff];
+        self.writecmd(self.GLITCHAPP,0x80,1,self.data);
+        #return ord(self.data[0]);
+    def glitchVERB(self,app,verb, data):
+        """Glitch during a transaction.."""
+        self.data=[app&0xff, verb&0xFF]+data;
+        self.writecmd(self.GLITCHAPP,0x81,len(self.data),self.data);
+        #return ord(self.data[0]);
+    def glitchVoltages(self,low=0x0880, high=0x0fff):
+        """Set glitching voltages. (0x0fff is max.)"""
+        self.data=[low&0xff, (low>>8)&0xff,
+                   high&0xff, (high>>8)&0xff];
+        self.writecmd(self.GLITCHAPP,0x90,4,self.data);
+        #return ord(self.data[0]);
+    def glitchRate(self,count=0x0800):
+        """Set glitching count period."""
+        self.data=[count&0xff, (count>>8)&0xff];
+        self.writecmd(self.GLITCHAPP,0x91,2,
+                      self.data);
+        #return ord(self.data[0]);
+    
     
     #Monitor stuff
     def silent(self,s=0):
diff --git a/client/goodfet.avr b/client/goodfet.avr
index 65426db..953e1b4 100755
--- a/client/goodfet.avr
+++ b/client/goodfet.avr
@@ -27,12 +27,28 @@ client.start();
 
 if(sys.argv[1]=="glitch"):
     print "Identifies as %s" % client.identstr();
+    client.glitchVoltages(0x880, 0xfff);
     for i in range(1,20):
         client.start();
         print "Identifies as %s, fused 0x%02x" % (
             client.identstr(),
             client.lockbits());
-
+if(sys.argv[1]=="glitchgraph"):
+    print "Identifies as %s" % client.identstr();
+    for voltage in range(0x860,0x890,5):
+        str="";
+        count=0;
+        #five minutes for 1,80
+        #thirty minutes for 1,500
+        
+        for i in range(1,40):
+            client.glitchVoltages(voltage, voltage);
+            client.start();
+            if(client.lockbits()==0xFF):
+                str="%s." % str;
+                count+=1;
+        print "%04x %s" % (voltage,str);
+        #print "%f, %i" % (voltage*(3.3/4096.0),count);
 if(sys.argv[1]=="info"):
     print "Identifies as %s" % client.identstr();
 if(sys.argv[1]=="erase"):
-- 
2.20.1