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From: =?iso-8859-1?Q?=D8yvind_Harboe?= <oyvind DOT harboe AT zylin DOT com>
To: <cygwin AT cygwin DOT com>
Subject: RE: Sending files over the serial port
Date: Mon, 12 May 2003 19:59:17 +0200
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Ah!

I couldn't solve the CygWin issues, but I think I have a solution
that will do for me.


Background: I'm not going to use this from the command line, but
from a Java app.

Here is what I did:

- I launched the lsz command from Java 
- From the Java app I opened up a serial port and read stdout
from lsz and fed it to the serial port and input from the serial
port to stdin of the lsz app



Voila! I have xmodem, ymodem and zmodem from Java.


I was able to upload to HyperTerminal in Windows using a nullmodem
cable when I tested.


Øyvind


In case anybody cares, here is the stuff that I hacked up to test
my hypothesis. If it flies (I need it to be compatible with
a certain troublesome bootloader, and Redboot), I'll have to clean
up the code to be production quality(lots of error handling).


import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.comm.CommPortIdentifier;
import javax.comm.NoSuchPortException;
import javax.comm.PortInUseException;
import javax.comm.SerialPort;
import javax.comm.UnsupportedCommOperationException;

public class Upload
{
	public void run() 
	{
		Runtime runtime=Runtime.getRuntime();
		
		try
		{
			//--16-bit-crc --ascii --escape 
			String
foo="c:\\cygwin\\home\\oyvind\\xyz\\install\\bin\\lsz --16-bit-crc
--ymodem c:\\download\\ntregmon.zip" ;
			Process process=runtime.exec(foo);
			System.out.println(foo);
			CommPortIdentifier portId =
CommPortIdentifier.getPortIdentifier("COM2");

			
			
			SerialPort sPort = (SerialPort)
portId.open("transfer", 0);
			
						
			sPort.setSerialPortParams(19200,
SerialPort.DATABITS_8, 
			SerialPort.STOPBITS_1,
			 SerialPort.PARITY_NONE);
			
	
sPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
			
			InputStream sIn=sPort.getInputStream();
			OutputStream sOut=sPort.getOutputStream();
			
			InputStream pIn = process.getInputStream();
			InputStream pErr = process.getErrorStream();
			OutputStream pOut = process.getOutputStream();
			
			
			all:
			for (;;)
			{
				Thread.sleep(100);
				while (pErr.available()>0)
				{
	
System.out.print((char)pErr.read());
				}
				try
				{
					process.exitValue();
					break all;
				}
				catch (IllegalThreadStateException e)
				{
				}
				/** received from process, stuffed into
serial port */
				while (pIn.available()>0)
				{
					int c=pIn.read();
					sOut.write(c);
					
	
//System.err.print(""+(char)c+"("+c+")");
				}
				sOut.flush();
				
				/** received from serial port, stuffed
into process */
				while (sIn.available()>0)
				{
					int c=sIn.read();
					
					pOut.write(c);
					
	
//System.out.print(""+(char)c+"("+c+")");
				}
				pOut.flush();
			}
			
			sPort.close();
		} catch (IOException e)
		{
			e.printStackTrace();
		} catch (NoSuchPortException e)
		{
			e.printStackTrace();
		} catch (PortInUseException e)
		{
			e.printStackTrace();
		} catch (UnsupportedCommOperationException e)
		{
			e.printStackTrace();
		} catch (InterruptedException e)
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args)
	{
		new Upload().run();
	}
}


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