+#!/usr/bin/env python
+# GoodFET Client Library
+#
+# (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
+#
+# This code is ugly as sin, for bootstrapping the firmware only.
+# Rewrite cleanly as soon as is convenient.
+
+import sys, time, string, cStringIO, struct
+sys.path.append("/usr/lib/tinyos")
+import serial
+
+
+class GoodFET:
+ def __init__(self, *args, **kargs):
+ print "inited\n";
+ self.data=[0];
+ def timeout(self):
+ print "timout\n";
+ def serInit(self, port):
+ """Open the serial port"""
+ self.serialport = serial.Serial(
+ port,
+ 9600,
+ parity = serial.PARITY_NONE
+ )
+ #Drop DTR, which is !RST, low to begin the app.
+ self.serialport.setDTR(0);
+ self.serialport.flushInput()
+ self.serialport.flushOutput()
+
+ #Read and handle the initial command.
+ time.sleep(1);
+ self.readcmd(); #Read the first command.
+ if(self.verb!=0x7F):
+ print "Verb is wrong. Incorrect firmware?";
+
+
+ def writecmd(self, app, verb, count, data):
+ """Write a command and some data to the GoodFET."""
+ self.serialport.write(chr(app));
+ self.serialport.write(chr(verb));
+ self.serialport.write(chr(count));
+ #print "count=%02x, len(data)=%04x" % (count,len(data));
+ if count!=0:
+ for d in data:
+ self.serialport.write(chr(d));
+ self.readcmd(); #Uncomment this later, to ensure a response.
+ def readcmd(self):
+ """Read a reply from the GoodFET."""
+ self.app=ord(self.serialport.read(1));
+ self.verb=ord(self.serialport.read(1));
+ self.count=ord(self.serialport.read(1));
+ if self.count>0:
+ self.data=self.serialport.read(self.count);
+ #print "READ %02x %02x %02x " % (self.app, self.verb, self.count);
+
+ #Monitor stuff
+ def peekbyte(self,address):
+ """Read a byte of memory from the monitor."""
+ self.data=[address&0xff,address>>8];
+ self.writecmd(0,0x02,2,self.data);
+ #self.readcmd();
+ return ord(self.data[0]);
+ def peekword(self,address):
+ """Read a word of memory from the monitor."""
+ return self.peekbyte(address)+(self.peekbyte(address+1)<<8);
+ def pokebyte(self,address,value):
+ """Set a byte of memory by the monitor."""
+ self.data=[address&0xff,address>>8,value];
+ self.writecmd(0,0x03,3,self.data);
+ return ord(self.data[0]);
+
+ def monitortest(self):
+ """Self-test several functions through the monitor."""
+ print "Performing monitor self-test.";
+
+ if self.peekword(0x0c00)!=0x0c04:
+ print "ERROR Fetched wrong value from 0x0c04.";
+ self.pokebyte(0x0021,0); #Drop LED
+ if self.peekbyte(0x0021)!=0:
+ print "ERROR, P1OUT not cleared.";
+ self.pokebyte(0x0021,1); #Light LED
+
+ print "Self-test complete.";
+
+ def spisetup(self):
+ """Moved the FET into the SPI application."""
+ print "Initializing SPI.";
+ self.writecmd(1,0x10,0,self.data); #SPI/SETUP
+ #self.readcmd();
+ def spitrans8(self,byte):
+ """Read and write 8 bits by SPI."""
+ self.data=[byte];
+ self.writecmd(1,0,1,self.data); #SPI exchange
+ #self.readcmd();
+
+ if self.app!=1 or self.verb!=0:
+ print "Error in SPI transaction; app=%02x, verb=%02x" % (self.app, self.verb);
+ return ord(self.data[0]);
+ def MSP430setup(self):
+ """Move the FET into the MSP430 JTAG application."""
+ print "Initializing MSP430.";
+ self.writecmd(0x11,0x10,0,self.data);
+ def MSP430peek(self,adr):
+ """Read the contents of memory at an address."""
+ self.data=[adr&0xff, (adr&0xff00)>>8];
+ self.writecmd(0x11,0x02,2,self.data);
+ return ord(self.data[0])+(ord(self.data[1])<<8);
+ def MSP430poke(self,adr,val):
+ """Read the contents of memory at an address."""
+ self.data=[adr&0xff, (adr&0xff00)>>8, val&0xff, (val&0xff00)>>8];
+ self.writecmd(0x11,0x03,4,self.data);
+ return;# ord(self.data[0])+(ord(self.data[1])<<8);
+
+ def MSP430start(self):
+ """Start debugging."""
+ self.writecmd(0x11,0x20,0,self.data);
+ def MSP430haltcpu(self):
+ """Halt the CPU."""
+ self.writecmd(0x11,0xA0,0,self.data);
+ def MSP430releasecpu(self):
+ """Resume the CPU."""
+ self.writecmd(0x11,0xA1,0,self.data);
+
+ def MSP430shiftir8(self,ins):
+ """Shift the 8-bit Instruction Register."""
+ data=[ins];
+ self.writecmd(0x11,0x80,1,data);
+ return ord(self.data[0]);
+ def MSP430shiftdr16(self,dat):
+ """Shift the 16-bit Data Register."""
+ data=[dat&0xFF,(dat&0xFF00)>>8];
+ self.writecmd(0x11,0x81,2,data);
+ return ord(self.data[0])#+(ord(self.data[1])<<8);
+ def MSP430setinstrfetch(self):
+ """Set the instruction fetch mode."""
+ self.writecmd(0x11,0xC1,0,self.data);
+ return self.data[0];
+ def MSP430test(self):
+ """Test MSP430 JTAG. Requires that a chip be attached."""
+ self.MSP430setup();
+ self.MSP430start();
+ self.MSP430haltcpu();
+
+ ident=self.MSP430peek(0x0ff0);
+ print "Target identifies as %04x." % ident;
+ if ident==0xffff:
+ print "Is anything connected?";
+ print "Testing RAM.";
+ temp=self.MSP430peek(0x0200);
+ self.MSP430poke(0x0200,0xdead);
+ if(self.MSP430peek(0x0200)!=0xdead):
+ print "Poke of 0x0200 did not set to 0xDEAD properly.";
+ exit;
+ self.MSP430poke(0x0200,temp); #restore old value.
+ self.MSP430releasecpu();
+
+ def MSP430dumpbsl(self):
+ i=0xC00;
+ while i<0x1000:
+ print "%04x %04x" % (i, self.MSP430peek(i));
+ i+=2;
+
projects / goodfet / commitdiff