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
  29         0x9001: "S1200",
  30
  31         0x9101: "S1213",
  32         0x9102: "S2323",
  33         0x9105: "S2333",
  34         0x9103: "S2343",
  35
  36         0x9201: "S4414",
  37         0x9203: "S4433",
  38         0x9202: "S4434",
  39
  40         0x9301: "S8515",
  41         0x9303: "S8535",
  42
  43         0x9305: "mega83",
  44         0x930a: "mega88",
  45         0x9701: "mega103",
  46         0x9401: "mega161",
  47         0x9402: "mega163",
  48         0x9406: "mega168",
  49
  50         0x950f: "mega328",
  51         0x950d: "mega325",
  52         0x9508: "mega32"
  53         };
  54
  55     def setup(self):
  56         """Move the FET into the SPI application."""
  57         self.writecmd(self.AVRAPP,0x10,0,self.data); #SPI/SETUP
  58
  59     def trans(self,data):
  60         """Exchange data by AVR.
  61         Input should probably be 4 bytes."""
  62         self.data=data;
  63         self.writecmd(self.AVRAPP,0x00,len(data),data);
  64         return self.data;
  65
  66     def start(self):
  67         """Start the connection."""
  68         self.writecmd(self.AVRAPP,0x20,0,None);
  69     def erase(self):
  70         """Erase the target chip."""
  71         self.writecmd(self.AVRAPP,0xF0,0,None);
  72     def lockbits(self):
  73         """Read the target's lockbits."""
  74         self.writecmd(self.AVRAPP,0x82,0,None);
  75         return ord(self.data[0]);
  76     def eeprompeek(self, adr):
  77         """Read a byte of the target's EEPROM."""
  78         self.writecmd(self.AVRAPP,0x81 ,2,
  79                       [ (adr&0xFF), (adr>>8)]
  80                       );#little-endian address
  81         return ord(self.data[0]);
  82     def flashpeek(self, adr):
  83         """Read a byte of the target's EEPROM."""
  84         self.writecmd(self.AVRAPP,0x02 ,2,
  85                       [ (adr&0xFF), (adr>>8)]
  86                       );#little-endian address
  87         return ord(self.data[0]);
  88     def flashpeekblock(self, adr):
  89         """Read a byte of the target's EEPROM."""
  90         self.writecmd(self.AVRAPP,0x02 ,4,
  91                       [ (adr&0xFF), (adr>>8) &0xFF, 0x80, 0x00]
  92                       );
  93         return self.data;
  94
  95     def eeprompoke(self, adr, val):
  96         """Write a byte of the target's EEPROM."""
  97         self.writecmd(self.AVRAPP,0x91 ,3,
  98                       [ (adr&0xFF), (adr>>8), val]
  99                       );#little-endian address
 100         return ord(self.data[0]);
 101
 102     def identstr(self):
 103         """Return an identifying string."""
 104         self.writecmd(self.AVRAPP,0x83,0, None);
 105         vendor=self.AVRVendors.get(ord(self.data[0]));
 106         deviceid=(ord(self.data[1])<<8)+ord(self.data[2]);
 107         device=self.AVRDevices.get(deviceid);
 108
 109         #Return hex if device is unknown.
 110         #They are similar enough that it needn't be known.
 111         if device==None:
 112             device=("0x%04x" % deviceid);
 113
 114         return device;