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

   1 #!/usr/bin/env python
   2 # GoodFET Client Library
   3 #
   4 # (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
   5 #
   6 # This code is ugly as sin, for bootstrapping the firmware only.
   7 # Rewrite cleanly as soon as is convenient.
   8
   9 import sys, time, string, cStringIO, struct
  10 sys.path.append("/usr/lib/tinyos")
  11 import serial
  12
  13
  14 class GoodFET:
  15     def __init__(self, *args, **kargs):
  16         self.data=[0];
  17     def timeout(self):
  18         print "timout\n";
  19     def serInit(self, port):
  20         """Open the serial port"""
  21         self.serialport = serial.Serial(
  22             port,
  23             #9600,
  24             115200,
  25             parity = serial.PARITY_NONE
  26             )
  27         #Drop DTR, which is !RST, low to begin the app.
  28         self.serialport.setDTR(0);
  29         self.serialport.flushInput()
  30         self.serialport.flushOutput()
  31
  32         #Read and handle the initial command.
  33         #time.sleep(1);
  34         self.readcmd(); #Read the first command.
  35         if(self.verb!=0x7F):
  36             print "Verb is wrong.  Incorrect firmware?";
  37
  38     def writecmd(self, app, verb, count, data):
  39         """Write a command and some data to the GoodFET."""
  40         self.serialport.write(chr(app));
  41         self.serialport.write(chr(verb));
  42         self.serialport.write(chr(count));
  43         #print "count=%02x, len(data)=%04x" % (count,len(data));
  44         if count!=0:
  45             for d in data:
  46                 self.serialport.write(chr(d));
  47         self.readcmd();  #Uncomment this later, to ensure a response.
  48     def readcmd(self):
  49         """Read a reply from the GoodFET."""
  50         self.app=ord(self.serialport.read(1));
  51         self.verb=ord(self.serialport.read(1));
  52         self.count=ord(self.serialport.read(1));
  53         if self.count>0:
  54             self.data=self.serialport.read(self.count);
  55         #print "READ %02x %02x %02x " % (self.app, self.verb, self.count);
  56
  57     #Monitor stuff
  58     def peekbyte(self,address):
  59         """Read a byte of memory from the monitor."""
  60         self.data=[address&0xff,address>>8];
  61         self.writecmd(0,0x02,2,self.data);
  62         #self.readcmd();
  63         return ord(self.data[0]);
  64     def peekword(self,address):
  65         """Read a word of memory from the monitor."""
  66         return self.peekbyte(address)+(self.peekbyte(address+1)<<8);
  67     def pokebyte(self,address,value):
  68         """Set a byte of memory by the monitor."""
  69         self.data=[address&0xff,address>>8,value];
  70         self.writecmd(0,0x03,3,self.data);
  71         return ord(self.data[0]);
  72     def setBaud(self,baud):
  73         rates=[9600, 9600, 19200, 38400];
  74         self.data=[baud];
  75         print "Changing FET baud."
  76         self.serialport.write(chr(0x00));
  77         self.serialport.write(chr(0x80));
  78         self.serialport.write(chr(1));
  79         self.serialport.write(chr(baud));
  80
  81         print "Changed host baud."
  82         self.serialport.setBaudrate(rates[baud]);
  83         time.sleep(1);
  84         self.serialport.flushInput()
  85         self.serialport.flushOutput()
  86
  87         print "Baud is now %i." % rates[baud];
  88         return;
  89     def monitortest(self):
  90         """Self-test several functions through the monitor."""
  91         print "Performing monitor self-test.";
  92
  93         if self.peekword(0x0c00)!=0x0c04:
  94             print "ERROR Fetched wrong value from 0x0c04.";
  95         self.pokebyte(0x0021,0); #Drop LED
  96         if self.peekbyte(0x0021)!=0:
  97             print "ERROR, P1OUT not cleared.";
  98         self.pokebyte(0x0021,1); #Light LED
  99
 100         print "Self-test complete.";
 101
 102     def spisetup(self):
 103         """Moved the FET into the SPI application."""
 104         self.writecmd(1,0x10,0,self.data); #SPI/SETUP
 105         #self.readcmd();
 106     def spitrans8(self,byte):
 107         """Read and write 8 bits by SPI."""
 108         self.data=[byte];
 109         self.writecmd(1,0,1,self.data);    #SPI exchange
 110         #self.readcmd();
 111
 112         if self.app!=1 or self.verb!=0:
 113             print "Error in SPI transaction; app=%02x, verb=%02x" % (self.app, self.verb);
 114         return ord(self.data[0]);
 115     def MSP430setup(self):
 116         """Move the FET into the MSP430 JTAG application."""
 117         print "Initializing MSP430.";
 118         self.writecmd(0x11,0x10,0,self.data);
 119     def MSP430peek(self,adr):
 120         """Read the contents of memory at an address."""
 121         self.data=[adr&0xff, (adr&0xff00)>>8];
 122         self.writecmd(0x11,0x02,2,self.data);
 123         return ord(self.data[0])+(ord(self.data[1])<<8);
 124     def MSP430poke(self,adr,val):
 125         """Read the contents of memory at an address."""
 126         self.data=[adr&0xff, (adr&0xff00)>>8, val&0xff, (val&0xff00)>>8];
 127         self.writecmd(0x11,0x03,4,self.data);
 128         return;# ord(self.data[0])+(ord(self.data[1])<<8);
 129
 130     def MSP430start(self):
 131         """Start debugging."""
 132         self.writecmd(0x11,0x20,0,self.data);
 133         ident=self.MSP430ident();
 134         print "Target identifies as %04x." % ident;
 135
 136     def MSP430stop(self):
 137         """Stop debugging."""
 138         self.writecmd(0x11,0x21,0,self.data);
 139     def MSP430haltcpu(self):
 140         """Halt the CPU."""
 141         self.writecmd(0x11,0xA0,0,self.data);
 142     def MSP430releasecpu(self):
 143         """Resume the CPU."""
 144         self.writecmd(0x11,0xA1,0,self.data);
 145
 146     def MSP430shiftir8(self,ins):
 147         """Shift the 8-bit Instruction Register."""
 148         data=[ins];
 149         self.writecmd(0x11,0x80,1,data);
 150         return ord(self.data[0]);
 151     def MSP430shiftdr16(self,dat):
 152         """Shift the 16-bit Data Register."""
 153         data=[dat&0xFF,(dat&0xFF00)>>8];
 154         self.writecmd(0x11,0x81,2,data);
 155         return ord(self.data[0])#+(ord(self.data[1])<<8);
 156     def MSP430setinstrfetch(self):
 157         """Set the instruction fetch mode."""
 158         self.writecmd(0x11,0xC1,0,self.data);
 159         return self.data[0];
 160     def MSP430ident(self):
 161         """Grab self-identification word from 0x0FF0 as big endian."""
 162         i=self.MSP430peek(0x0ff0);
 163         return ((i&0xFF00)>>8)+((i&0xFF)<<8)
 164     def MSP430test(self):
 165         """Test MSP430 JTAG.  Requires that a chip be attached."""
 166         if self.MSP430ident()==0xffff:
 167             print "Is anything connected?";
 168         print "Testing RAM.";
 169         temp=self.MSP430peek(0x0200);
 170         self.MSP430poke(0x0200,0xdead);
 171         if(self.MSP430peek(0x0200)!=0xdead):
 172             print "Poke of 0x0200 did not set to 0xDEAD properly.";
 173             return;
 174         self.MSP430poke(0x0200,temp); #restore old value.
 175     def MSP430flashtest(self):
 176         self.MSP430masserase();
 177         i=0x2500;
 178         while(i<0xFFFF):
 179             if(self.MSP430peek(i)!=0xFFFF):
 180                 print "ERROR: Unerased flash at %04x."%i;
 181             self.MSP430writeflash(i,0xDEAD);
 182             i+=2;
 183     def MSP430masserase(self):
 184         """Erase MSP430 flash memory."""
 185         self.writecmd(0x11,0xE3,0,None);
 186     def MSP430writeflash(self,adr,val):
 187         """Write a word of flash memory."""
 188         if(self.MSP430peek(adr)!=0xFFFF):
 189             print "FLASH ERROR: %04x not clear." % adr;
 190         data=[adr&0xFF,(adr&0xFF00)>>8,val&0xFF,(val&0xFF00)>>8];
 191         self.writecmd(0x11,0xE1,4,data);
 192         rval=ord(self.data[0])+(ord(self.data[1])<<8);
 193         if(val!=rval):
 194             print "FLASH WRITE ERROR AT %04x.  Found %04x, wrote %04x." % (adr,rval,val);
 195
 196     def MSP430dumpbsl(self):
 197         self.MSP430dumpmem(0xC00,0xfff);
 198     def MSP430dumpallmem(self):
 199         self.MSP430dumpmem(0x200,0xffff);
 200     def MSP430dumpmem(self,begin,end):
 201         i=begin;
 202         while i<end:
 203             print "%04x %04x" % (i, self.MSP430peek(i));
 204             i+=2;
 205