www.pudn.com > ejip.zip > Native.java

 
package com.jopdesign.sys; 
 
/** 
*	functions in JOP JVM simulated on PC! 
*/ 
 
import java.io.*; 
import javax.comm.*; 
 
public class Native { 
// 
// Reihenfolge so lassen!!! 
// ergibt static funktionsnummern: 
//		1 rd 
//		2 wr 
//		... 
// 
	private static final int IO_STATUS = 1; 
	private static final int IO_UART = 2; 
 
	private static final int MSK_UA_TDRE = 1; 
	private static final int MSK_UA_RDRF = 2; 
 
	public static final int IO_CNT = 10; 
	public static final int IO_WD = 7; 
 
/** 
*	JOP clock ticks per ms 
*/ 
	private static int TICKS = 20000;		// 20 MHz 
	private static long startTime; 
 
	public static int rd(int addr) { 
 
		int i; 
 
		try{ 
 
			switch (addr) { 
				case IO_STATUS: 
					i = 0; 
					if (is.available()!=0) i |= MSK_UA_RDRF;	// rdrf 
					i |= MSK_UA_TDRE;							// tdre is alwais true on OutputStream 
					return i; 
				case IO_UART: 
					i =  is.read(); 
// System.out.println("Native: read() '"+(char) i+"'"); 
					return i; 
				case IO_CNT: 
					return (int) ((System.currentTimeMillis()-startTime)*TICKS); 
				default: 
//					System.out.println("Native: address "+addr+" not implemented"); 
			} 
		} catch (IOException e) { 
			System.out.println(e.getMessage()); 
		} 
 
		return 0x80;	// INIT_DONE for CS8900 
	} 
 
	public static void wr(int val, int addr) { 
 
		try{ 
 
			switch (addr) { 
				case IO_UART: 
// System.out.println("Native: write() "+(char) val); 
					os.write(val); 
					break; 
				case IO_WD: 
					// ignore 
System.out.print(val==0 ? "o" : "*"); 
					break; 
				default: 
//					System.out.println("Native: address "+addr+" not implemented"); 
			} 
		} catch (IOException e) { 
			System.out.println(e.getMessage()); 
		} 
	} 
 
	private static final int HTML_START = 0x80000;	// start at first address (should be changed!) 
 
	private static String html = "" + 
								"" +  
								"" + 
								"" + 
								"" + 
								"
Test Page
" + 
								"
!ht" + 
								"" + 
								""; 
	/** 
	*	Simulation of JOP memory. 
	*	return HTML normal stored in Flash. 
	*/ 
	public static int rdMem(int addr) { 
 
		int i = addr-HTML_START; 
 
		if (i<0 || i>=html.length()) { 
			return 0; 
		} else { 
			return html.charAt(i); 
		} 
	} 
 
	public static void wrMem(int val, int addr) { return; } 
	public static int rdIntMem(int addr) { return 1; } 
	public static void wrIntMem(int val, int addr) { return; } 
	public static int getSP() { return 1; } 
	public static void setSP(int val) { return; } 
	public static int getVP() { return 1; } 
	public static void setVP(int val) { return; } 
 
	private static CommPortIdentifier portId; 
	private static InputStream is; 
	private static OutputStream os; 
	private static SerialPort serialPort; 
 
/** 
*	open serial port. 
*/ 
	static { 
		startTime = System.currentTimeMillis(); 
 
		try { 
			portId = CommPortIdentifier.getPortIdentifier("COM4"); 
			serialPort = (SerialPort) portId.open("Test", 2000); 
			is = serialPort.getInputStream(); 
 
	   		// serialPort.addEventListener(this); 
			// serialPort.notifyOnDataAvailable(true); 
 
			os = serialPort.getOutputStream(); 
			serialPort.setSerialPortParams(115200, 
				SerialPort.DATABITS_8, 
				SerialPort.STOPBITS_1, 
				SerialPort.PARITY_NONE); 
			serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_RTSCTS_OUT 
										| SerialPort.FLOWCONTROL_RTSCTS_IN); 
 
		} catch (Exception e) { 
System.out.println("problem with serial port"); 
			System.out.println(e.getMessage()); 
			System.exit(-1); 
		} 
	} 
}