/*  Cranked out in an evening by degs AT ece DOT gatech DOT edu on 15 Apr 2007
This code is public domain with no implied warranty.  
You are on your own.

This program makes a PWL (piece wise linear) source file for spectre.

updates:
26 Apr 2007
Put all of the clock stuff back. :/
Added the get content pane so it'd run on the Tech solaris machines.

25 Apr 2007
Removed the clock .pwl generation because it just makes things slow to read the clock from a pwl file.
Just use a pulse source.

*/

/*
output format: <time> <voltage>
0 3.300000
2.500000e+00  3.300000
7.500000e+00  3.300000
1.250000e+01  0.000000
1.750000e+01  0.000000
2.250000e+01  3.300000
2.750000e+01  3.300000
3.250000e+01  0.000000
3.750000e+01  0.000000

*/

import java.awt.*;
import java.io.*;
import java.lang.*;
import java.util.*;
import java.awt.event.*;
import java.beans.*;
import javax.swing.*;
import javax.swing.border.*;


public class pwlbits extends JFrame implements ActionListener{

	private JTextField JTFbitstream;
	private JTextField JTFfrequency;
	private JTextField JTFfilename;
	private JTextField JTFvdd;
	private JRadioButton risingButton;
	private  JRadioButton fallingButton;
	private JComboBox timeList;
	private ButtonGroup group;
	
	private StringBuffer datastring = null;
	private StringBuffer clockstring = null;
	
	private String[] timeStrings = { "psec", "nsec", "usec", "msec", "sec" };

	public pwlbits() 
	{
		super("piece wise linear stream creator");
		this.setSize(400,230);
		
		Container content = this.getContentPane();
    	content.setBackground(Color.white);
    //	content.setLayout(new FlowLayout()); 
    	content.setLayout(new GridLayout(5,1)); 



		JPanel p1 = new JPanel(new FlowLayout());
		JTFbitstream = new JTextField(20);
		p1.add(new JLabel("bitstream in HEX"));
		p1.add(JTFbitstream);
		p1.add(new JLabel(""));

		JPanel p2 = new JPanel(new FlowLayout());
		p2.setPreferredSize(new Dimension(400,30));
		JTFfrequency = new JTextField(4);
		p2.add(new JLabel("clock period/latch"));
		p2.add(JTFfrequency);
		timeList = new JComboBox(timeStrings);
        timeList.setSelectedIndex(1);
		p2.add(timeList);
		group = new ButtonGroup();
		risingButton = new JRadioButton("rising");
        risingButton.setActionCommand("rising");
       // risingButton.setSelected(true);
        fallingButton = new JRadioButton("falling");
        fallingButton.setActionCommand("falling");
        fallingButton.setSelected(true);
        group.add(risingButton);
        group.add(fallingButton);
		p2.add(risingButton);
		p2.add(fallingButton);
		
		
		JPanel p3 = new JPanel(new FlowLayout());
		p3.setPreferredSize(new Dimension(400,30));
		JTFfilename = new JTextField(12);
		p3.add(new JLabel("save to:"));
		p3.add(JTFfilename);
		p3.add(new JLabel(".pwl"));
		JButton save = new JButton("save");
		save.setActionCommand("save");
		save.addActionListener(this);
		p3.add(save);
		
		JPanel p4 = new JPanel(new FlowLayout());
		p4.setPreferredSize(new Dimension(400,30));
		JTFvdd= new JTextField(4);
		p4.add(new JLabel("vdd "));
		p4.add(JTFvdd);
		p4.add(new JLabel(""));
		
		JPanel p5 = new JPanel(new FlowLayout());
		p5.setPreferredSize(new Dimension(400,140));
		p5.add(new JLabel("So what is this?  It makes piece-wise-linear"));
		p5.add(new JLabel("(PWL) waveforms for spectre. ")); 
		/*
		It'll make "));
		p4.add(new JLabel("2 files. One of the data, and one with a clock."));
		p4.add(new JLabel("The clock will rise or fall midwave of the data."));
		*/
		
		
		this.getContentPane().add(p1);
		this.getContentPane().add(p2);
		
		this.getContentPane().add(p4);
		this.getContentPane().add(p3);
		this.getContentPane().add(p5);
		
		//this.addWindowListener(new ExitListener());
    	this.setVisible(true);
    	
    	
	}

	public void actionPerformed(ActionEvent e)
		{
			String savefilename = null;
			String bitstream = null;
			String frequency = null;
			String buttontext = null;
			String speedtext = null;
			String vdd = null;
			int speedint = 0;
			int tmp = 0;
			boolean buttonbool = false;
			
			//System.out.println("action: "+e);
			if ("save".equals(e.getActionCommand())) {
				try{
				savefilename = new String(JTFfilename.getText());
				//System.out.println("got: "+savefilename);
					if(savefilename.length()<=0)
					{
						JOptionPane.showMessageDialog(this, "You need to enter a save filename.");
					}else //we have a filename:
					{
						//System.out.println("okay");
						//get everything
						bitstream = (JTFbitstream.getText()).trim();
						if(bitstream.length()<1)
						{
							bitstream = "0";
						}
						frequency = (JTFfrequency.getText()).trim();
						if(frequency.length()<1)
						{
							frequency = "1";
						}
						vdd = (JTFvdd.getText()).trim();
						if(vdd.length()<1)
						{
							vdd = "3.3";
						}
						
						buttontext = (group.getSelection()).getActionCommand();
						if("rising".equals(buttontext))
						{buttonbool = true;}else
						{buttonbool = false;}
						
						//"psec", "nsec", "usec", "msec", "sec" 
						speedtext =(String)(timeList.getSelectedItem());//.getText();
						if("psec".equals(speedtext))
						{speedint = 12;}
						else if("nsec".equals(speedtext))
						{speedint = 9;}
						else if("usec".equals(speedtext))
						{speedint = 6;}
						else if("msec".equals(speedtext))
						{speedint = 3;}
						else if("sec".equals(speedtext))
						{speedint = 0;}
						 
						clockstring = new StringBuffer(2048);
						datastring = new StringBuffer(2048); 
						 
						tmp = writedatastring(bitstream,frequency,speedint,vdd);
						if(tmp>0)
						{
							//writetimestring(String time, int timemag, String vdd, boolean rise, int cycles )
						
							writetimestring(frequency,speedint,vdd,buttonbool,tmp);
							try {
							FileWriter fw = new FileWriter(new File(savefilename+".pwl"));
							fw.write(datastring.toString());
							fw.flush();
							fw.close();
							fw= null;
							fw = new FileWriter(new File(savefilename+".clk"));
							fw.write(clockstring.toString());
							fw.flush();
							fw.close();
							
							} catch (IOException eio) {
								System.out.println("when trying to write file:\n "+eio);
								JOptionPane.showMessageDialog(this, "Failed to write file! ");
								
							}
							JOptionPane.showMessageDialog(this, "file: "+savefilename+".pwl written.");
						}else
						{
							JOptionPane.showMessageDialog(this, "Failed to create PWL waveforms. ");
						}
						
						clockstring = null;
						datastring = null;
						System.gc();
						
						/*
						System.out.println("got: "+bitstream);
						System.out.println("got: "+frequency);
						System.out.println("got: "+buttontext);
						System.out.println("got: "+speedtext);
						*/
						
					}
				
				
				}catch(Exception exc)
				{
					System.out.println("caught: "+exc);
				}
				
				
			}else
			{
				System.out.println("how'd this happen?");
			}
			
		}
	public String paddedbinary(int shortbin)
	{
		String togo = null;
		String strbin = null;
		
		strbin = Integer.toBinaryString(shortbin);
		if(strbin.length()==1)
		{
			return("000"+strbin);
		}else if(strbin.length()==2)
		{
			return("00"+strbin);
		}else if(strbin.length()==3)
		{
			return("0"+strbin);
		}else if(strbin.length()==4)
		{
			return(strbin);
		}
		return(strbin);
	}
	public int writetimestring(String time, int timemag, String vdd, boolean rise, int cycles )
	{
		int stringcounter =0;
		float step = 0;
		float timer= 0;
		int count = 0;
		
		try{
			step = Float.parseFloat(time)/2;
			if(rise==true)
			{
				for(count=0;count<cycles;count++)
				{
					clockstring.append(timer+"e-"+timemag+" "+vdd+"\n");
					clockstring.append((timer+0.001)+"e-"+timemag+" 0\n");
					timer = timer + step;
					clockstring.append(timer+"e-"+timemag+" 0\n");
					clockstring.append((timer+0.001)+"e-"+timemag+" "+vdd+"\n");
					timer = timer + step;
				}
			}else
			{
			for(count=0;count<cycles;count++)
				{
					clockstring.append(timer+"e-"+timemag+" 0\n");
					clockstring.append((timer+0.001)+"e-"+timemag+" "+vdd+"\n");
					timer = timer + step;
					clockstring.append((timer)+"e-"+timemag+" "+vdd+"\n");
					clockstring.append((timer+0.001)+"e-"+timemag+" 0\n");
					timer = timer + step;
				}
			}
		
		
		}catch(Exception e)
		{
			System.out.println("Exception while trying to parse time: "+e);
			return(-1);
		}
		
		
		return(0);
	}
	
	
	public int writedatastring(String hex, String time, int timemag, String vdd )
	{
		//First, we need to create out time slice
		String tmps = null;		
		int hexcounter =0 ;
		int hexval = 0;
		String hexstring = null;
		int stringcounter =0;
		float step = 0;
		float timer= 0;
		int lastbit = 0;
		
		try{
			step = Float.parseFloat(time);
		
		}catch(Exception e)
		{
			System.out.println("Exception while trying to parse time: "+e);
			return(-1);
		}
		
		//now, lets get the data
		try{
		
			for(stringcounter = 0; stringcounter<hex.length();stringcounter++)
			{
				hexval = Integer.parseInt(hex.substring(stringcounter,stringcounter+1),16);
				hexstring = paddedbinary(hexval);
				for(hexcounter = 0; hexcounter < hexstring.length();hexcounter++)
				{
					if((hexcounter==0)&&(stringcounter==0))
					{
						if(Integer.parseInt(hexstring.substring(hexcounter,hexcounter+1))==1)
						{
							//System.out.println(timer+"e-"+timemag+" "+vdd);
							datastring.append(timer+"e-"+timemag+" "+vdd+"\n");
							lastbit = 1;
						}else{
							//System.out.println(timer+"e-"+timemag+" 0");
							datastring.append(timer+"e-"+timemag+" 0\n");
							lastbit = 0;
						}
					}	
					else
					{
						if(lastbit==0)
						{
							datastring.append((timer-0.001)+"e-"+timemag+" 0\n");
						}else
						{
							datastring.append((timer-0.001)+"e-"+timemag+" "+vdd+"\n");
						}
						if(Integer.parseInt(hexstring.substring(hexcounter,hexcounter+1))==1)
						{
							//System.out.println(timer+"e-"+timemag+" "+vdd);
							datastring.append(timer+"e-"+timemag+" "+vdd+"\n");
							lastbit = 1;
						}else{
							//System.out.println(timer+"e-"+timemag+" 0");
							datastring.append(timer+"e-"+timemag+" 0\n");
							lastbit = 0;
						}
					}
					
					timer = timer + step;
				
				}
				//System.out.println(" : "+hex.substring(stringcounter,stringcounter+1));
			}
		
		}catch(Exception e)
		{
			System.out.println("Exception while trying to parse data: "+e);
			return(-1);
		}
		
		return(stringcounter*4);
	}


	public static void main(String[] args) {
	
		System.out.println("by degs [at] ece [dot] gatech [dot] edu");
		System.out.println("track down the source via http://users.ece.gatech.edu/degs/");
		pwlbits pwl =new pwlbits();
		pwl.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	
	}

}