#!/usr/bin/env python
# GoodFET Client Application
# 
# (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 Client:
    def __init__(self, *args, **kargs):
        print "inited\n";
    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.
        client.readcmd();
        client.handlecmd();
        
        time.sleep(1);
    def writecmd(self, app, verb, count, data):
        self.serialport.write(chr(app));
        self.serialport.write(chr(verb));
        self.serialport.write(chr(count));
        #print "count=%02x, len(data)=%04x" % (count,len(data));
        for d in data:
            self.serialport.write(chr(d));
    def readcmd(self):
        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 "%02x %02x %02x" % (self.app, self.verb, self.count);
    def handlemonitor(self):
        if self.verb==0x7E:
            print "Monitor: NOK";
        if self.verb==0x7F:
            print "Monitor: OK";
    def handlecmd(self):
        if self.app==0:
            #print "Monitor command."
            self.handlemonitor();
        else:
            print "Unknown application %02x." % self.app
    
    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);
        self.readcmd();
        #print "POKE returned %02x" % ord(self.data[0]);
        return ord(self.data[0]);
    
    def monitortest(self):
        """Self-test several functions through the monitor."""
        print "Performing 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.";

client=Client();
client.serInit("/dev/ttyUSB0")



client.monitortest();