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             parity = serial.PARITY_NONE
  25             )
  26         #Drop DTR, which is !RST, low to begin the app.
  27         self.serialport.setDTR(0);
  28         self.serialport.flushInput()
  29         self.serialport.flushOutput()
  30
  31         #Read and handle the initial command.
  32         time.sleep(1);
  33         self.readcmd(); #Read the first command.
  34         if(self.verb!=0x7F):
  35             print "Verb is wrong.  Incorrect firmware?";
  36
  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
  73     def monitortest(self):
  74         """Self-test several functions through the monitor."""
  75         print "Performing monitor self-test.";
  76
  77         if self.peekword(0x0c00)!=0x0c04:
  78             print "ERROR Fetched wrong value from 0x0c04.";
  79         self.pokebyte(0x0021,0); #Drop LED
  80         if self.peekbyte(0x0021)!=0:
  81             print "ERROR, P1OUT not cleared.";
  82         self.pokebyte(0x0021,1); #Light LED
  83
  84         print "Self-test complete.";
  85
  86     def spisetup(self):
  87         """Moved the FET into the SPI application."""
  88         self.writecmd(1,0x10,0,self.data); #SPI/SETUP
  89         #self.readcmd();
  90     def spitrans8(self,byte):
  91         """Read and write 8 bits by SPI."""
  92         self.data=[byte];
  93         self.writecmd(1,0,1,self.data);    #SPI exchange
  94         #self.readcmd();
  95
  96         if self.app!=1 or self.verb!=0:
  97             print "Error in SPI transaction; app=%02x, verb=%02x" % (self.app, self.verb);
  98         return ord(self.data[0]);
  99     def MSP430setup(self):
 100         """Move the FET into the MSP430 JTAG application."""
 101         print "Initializing MSP430.";
 102         self.writecmd(0x11,0x10,0,self.data);
 103     def MSP430peek(self,adr):
 104         """Read the contents of memory at an address."""
 105         self.data=[adr&0xff, (adr&0xff00)>>8];
 106         self.writecmd(0x11,0x02,2,self.data);
 107         return ord(self.data[0])+(ord(self.data[1])<<8);
 108     def MSP430poke(self,adr,val):
 109         """Read the contents of memory at an address."""
 110         self.data=[adr&0xff, (adr&0xff00)>>8, val&0xff, (val&0xff00)>>8];
 111         self.writecmd(0x11,0x03,4,self.data);
 112         return;# ord(self.data[0])+(ord(self.data[1])<<8);
 113
 114     def MSP430start(self):
 115         """Start debugging."""
 116         self.writecmd(0x11,0x20,0,self.data);
 117     def MSP430stop(self):
 118         """Stop debugging."""
 119         self.writecmd(0x11,0x21,0,self.data);
 120     def MSP430haltcpu(self):
 121         """Halt the CPU."""
 122         self.writecmd(0x11,0xA0,0,self.data);
 123     def MSP430releasecpu(self):
 124         """Resume the CPU."""
 125         self.writecmd(0x11,0xA1,0,self.data);
 126
 127     def MSP430shiftir8(self,ins):
 128         """Shift the 8-bit Instruction Register."""
 129         data=[ins];
 130         self.writecmd(0x11,0x80,1,data);
 131         return ord(self.data[0]);
 132     def MSP430shiftdr16(self,dat):
 133         """Shift the 16-bit Data Register."""
 134         data=[dat&0xFF,(dat&0xFF00)>>8];
 135         self.writecmd(0x11,0x81,2,data);
 136         return ord(self.data[0])#+(ord(self.data[1])<<8);
 137     def MSP430setinstrfetch(self):
 138         """Set the instruction fetch mode."""
 139         self.writecmd(0x11,0xC1,0,self.data);
 140         return self.data[0];
 141     def MSP430test(self):
 142         """Test MSP430 JTAG.  Requires that a chip be attached."""
 143         #self.MSP430setup();
 144         #self.MSP430start();
 145         self.MSP430haltcpu();
 146
 147         ident=self.MSP430peek(0x0ff0);
 148         print "Target identifies as %04x." % ident;
 149         if ident==0xffff:
 150             print "Is anything connected?";
 151         print "Testing RAM.";
 152         temp=self.MSP430peek(0x0200);
 153         self.MSP430poke(0x0200,0xdead);
 154         if(self.MSP430peek(0x0200)!=0xdead):
 155             print "Poke of 0x0200 did not set to 0xDEAD properly.";
 156             return;
 157         self.MSP430poke(0x0200,temp); #restore old value.
 158         self.MSP430releasecpu();
 159
 160     def MSP430dumpbsl(self):
 161         self.MSP430dumpmem(0xC00,0xfff);
 162     def MSP430dumpallmem(self):
 163         self.MSP430dumpmem(0x200,0xffff);
 164     def MSP430dumpmem(self,begin,end):
 165         i=begin;
 166         while i<end:
 167             print "%04x %04x" % (i, self.MSP430peek(i));
 168             i+=2;
 169