git.rot13.org Git - goodfet/blob - client/GoodFETAVR.py

   1 #!/usr/bin/env python
   2 # GoodFET SPI and SPIFlash Client Library
   3 #
   4 # (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
   5 #
   6 # This code is being rewritten and refactored.  You've been warned!
   7
   8 import sys, time, string, cStringIO, struct, glob, serial, os;
   9
  10 from GoodFET import GoodFET;
  11
  12 class GoodFETAVR(GoodFET):
  13     AVRAPP=0x32;
  14     AVRVendors={0x1E: "Atmel",
  15                 0x00: "Locked",
  16                 };
  17
  18     #List from avr910.asm and other sources.
  19     #More devices at http://avr.fenceline.de/device_data.html
  20     AVRDevices={
  21         0x9003: "tiny10",
  22         0x9004: "tiny11",
  23         0x9005: "tiny12",
  24         0x9006: "tiny15",
  25         0x9007: "tiny13",
  26         0x9108: "tiny25",
  27         0x930B: "tiny85",
  28         0x9206: "tiny45",
  29
  30         0x9001: "S1200",
  31
  32         0x9101: "S1213",
  33         0x9102: "S2323",
  34         0x9105: "S2333",
  35         0x9103: "S2343",
  36
  37         0x9201: "S4414",
  38         0x9203: "S4433",
  39         0x9202: "S4434",
  40
  41         0x9301: "S8515",
  42         0x9303: "S8535",
  43
  44         0x9305: "mega83",
  45         0x930a: "mega88",
  46         0x9701: "mega103",
  47         0x9401: "mega161",
  48         0x9402: "mega163",
  49         0x9406: "mega168",
  50
  51         0x950f: "mega328",
  52         0x950d: "mega325",
  53         0x9508: "mega32"
  54         };
  55
  56     def setup(self):
  57         """Move the FET into the SPI application."""
  58         self.writecmd(self.AVRAPP,0x10,0,self.data); #SPI/SETUP
  59
  60     def trans(self,data):
  61         """Exchange data by AVR.
  62         Input should probably be 4 bytes."""
  63         self.data=data;
  64         self.writecmd(self.AVRAPP,0x00,len(data),data);
  65         return self.data;
  66
  67     def start(self):
  68         """Start the connection."""
  69         self.writecmd(self.AVRAPP,0x20,0,None);
  70     def glitchstart(self):
  71         """Glitch into the AVR application."""
  72         self.glitchVerb(self.AVRAPP,0x20,None);
  73     def glitchstarttime(self):
  74         """Measure the timer of the START verb."""
  75         return self.glitchTime(self.AVRAPP,0x20,None);
  76     def forcestart(self):
  77         """Forcibly start a connection."""
  78
  79         for i in range(0x880,0xfff):
  80             #self.glitchVoltages(0x880, i);
  81             self.start();
  82             bits=self.lockbits();
  83             print "At %04x, Lockbits: %02x" % (i,bits);
  84             if(bits==0xFF): return;
  85     def erase(self):
  86         """Erase the target chip."""
  87         self.writecmd(self.AVRAPP,0xF0,0,None);
  88     def lockbits(self):
  89         """Read the target's lockbits."""
  90         self.writecmd(self.AVRAPP,0x82,0,None);
  91         return ord(self.data[0]);
  92     def setlockbits(self,bits=0x00):
  93         """Read the target's lockbits."""
  94         self.writecmd(self.AVRAPP,0x92,1,[bits]);
  95         return self.lockbits();
  96
  97     def eeprompeek(self, adr):
  98         """Read a byte of the target's EEPROM."""
  99         self.writecmd(self.AVRAPP,0x81 ,2,
 100                       [ (adr&0xFF), (adr>>8)]
 101                       );#little-endian address
 102         return ord(self.data[0]);
 103     def flashpeek(self, adr):
 104         """Read a byte of the target's EEPROM."""
 105         self.writecmd(self.AVRAPP,0x02 ,2,
 106                       [ (adr&0xFF), (adr>>8)]
 107                       );#little-endian address
 108         return ord(self.data[0]);
 109     def flashpeekblock(self, adr):
 110         """Read a byte of the target's EEPROM."""
 111         self.writecmd(self.AVRAPP,0x02 ,4,
 112                       [ (adr&0xFF), (adr>>8) &0xFF, 0x80, 0x00]
 113                       );
 114         return self.data;
 115
 116     def eeprompoke(self, adr, val):
 117         """Write a byte of the target's EEPROM."""
 118         self.writecmd(self.AVRAPP,0x91 ,3,
 119                       [ (adr&0xFF), (adr>>8), val]
 120                       );#little-endian address
 121         return ord(self.data[0]);
 122
 123     def identstr(self):
 124         """Return an identifying string."""
 125         self.writecmd(self.AVRAPP,0x83,0, None);
 126         vendor=self.AVRVendors.get(ord(self.data[0]));
 127         deviceid=(ord(self.data[1])<<8)+ord(self.data[2]);
 128         device=self.AVRDevices.get(deviceid);
 129
 130         #Return hex if device is unknown.
 131         #They are similar enough that it needn't be known.
 132         if device==None:
 133             device=("0x%04x" % deviceid);
 134
 135         return "%s %s" % (vendor,device);