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2 Commits

Author SHA1 Message Date
Darkress
bbe1229670 added Xorlw in CommandDecoder 2023-05-29 15:33:48 +02:00
Darkress
0d1db917c0 implemented Xorlw Instruction 2023-05-29 03:09:14 +02:00
48 changed files with 90 additions and 1266 deletions

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@@ -1,40 +1,18 @@
package de.darkress.pic16f84sim; package de.darkress.pic16f84sim;
import de.darkress.pic16f84sim.cli.Cli;
import de.darkress.pic16f84sim.commands.Command; import de.darkress.pic16f84sim.commands.Command;
import de.darkress.pic16f84sim.decoder.CommandDecoder;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter; import java.util.ArrayList;
import de.darkress.pic16f84sim.microcontroller.Watchdog;
import de.darkress.pic16f84sim.parser.Parser;
import java.util.Scanner;
class Main class Main
{ {
public static void main(String[] args) { public static void main(String[] args) {
ArrayList<Command> program = new ArrayList<>();
Memory.workingRegister = 0xAA;
int input1 = 0x3AFF;
program.add(CommandDecoder.decode(input1));
program.get(0).execute();
Command[] program = Parser.parser("de/darkress/pic16f84sim/TestPrograms/TPicSim8.LST");
Memory.initMemory();
while(ProgramCounter.getPc() < 1024)
{
if((Memory.getRegister(0x03) & 0x10) == 0x00) { // Checking WDT in Status Register
System.out.println("Resetting device");
Watchdog.resetProgram();
}
String[] instructionName = program[ProgramCounter.getPc()].getClass().toString().split("\\.");
System.out.println("Command: " + instructionName[instructionName.length -1]);
program[ProgramCounter.getPc()].execute();
Cli.showDefaultRegisters();
askForInput();
}
}
private static void askForInput() {
System.out.println("Wanna give some more input?:");
Scanner scanner = new Scanner(System.in);
String userInput = scanner.nextLine();
if(!(userInput.equals(""))) askForInput();
} }
} }

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@@ -1,42 +0,0 @@
package de.darkress.pic16f84sim.cli;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.Stack;
import de.darkress.pic16f84sim.microcontroller.Timer;
public class Cli
{
public static void showDefaultRegisters() {
printf(Memory.workingRegister, "W-Reg", true);
printf(Cycles.getCycles(), "Cycles", false);
System.out.printf("%n");
printf(Memory.getRegister(0x03), "Status", true);
printf(Memory.getOption(), "Option", true);
System.out.printf("%n");
printf(Memory.getFSR(), "FSR", true);
printf(Stack.getStackPointer(), "Stackpointer", true);
System.out.printf("%n");
printf(Memory.getTimer(), "Timer", true);
printf(Timer.getCyclesToTimerIncrease(), "Prescaler", true);
System.out.printf("%n");
printf(Memory.getPCLATH(), "PCLATH", true);
printf(Memory.getPCL(), "PCL", true);
System.out.printf("%n");
System.out.printf("%s:\t\t%s\t", "PortA", Integer.toBinaryString(Memory.getPortA()));
System.out.printf("%s:\t\t%s\t", "PortB", Integer.toBinaryString(Memory.getPortB()));
System.out.printf("%n");
printf(Memory.getRegister(0x0B), "IntCon", true);
System.out.printf("%n");
}
private static void printf(int value, String description, boolean hex) {
if(hex) {
System.out.printf("%s:\t\t%s\t", description, Integer.toHexString(value));
} else {
System.out.printf("%s:\t\t%d\t", description, value);
}
}
}

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@@ -1,10 +1,8 @@
package de.darkress.pic16f84sim.commands; package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Addlw extends LiteralCommandUtils implements Command public class Addlw extends CommandUtils implements Command
{ {
private final int literal; private final int literal;
@@ -16,8 +14,6 @@ public class Addlw extends LiteralCommandUtils implements Command
@Override @Override
public void execute() public void execute()
{ {
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal + Memory.workingRegister; int result = literal + Memory.workingRegister;
checkZeroBit(result); checkZeroBit(result);

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@@ -1,31 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Addwf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Addwf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + Memory.workingRegister;
checkZeroBit(result);
checkCarryBit(result);
checkDigitCarryBit(address);
writeToDestination(destinationBit, address, result);
}
}

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@@ -1,10 +1,8 @@
package de.darkress.pic16f84sim.commands; package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Andlw extends LiteralCommandUtils implements Command public class Andlw extends CommandUtils implements Command
{ {
private final int literal; private final int literal;
@@ -15,8 +13,6 @@ public class Andlw extends LiteralCommandUtils implements Command
@Override @Override
public void execute() public void execute()
{ {
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal & Memory.workingRegister; int result = literal & Memory.workingRegister;
checkZeroBit(result); checkZeroBit(result);

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@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Andwf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Andwf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) & Memory.workingRegister;
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
}
}

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@@ -1,28 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Bcf extends BitOrientedCommandUtils implements Command
{
private final int address;
private int bitPlacement;
public Bcf(int input)
{
address = input & 0x007F;
bitPlacement = checkBitPlacement(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address);
result &= ~(1 << bitPlacement); //Mask n-th bit with 0
Memory.setRegister(address, result);
}
}

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@@ -1,11 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Memory;
public class BitOrientedCommandUtils
{
protected int checkBitPlacement(int input)
{
return ((input & 0x0380) >>7);
}
}

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@@ -1,28 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Bsf extends BitOrientedCommandUtils implements Command
{
private final int address;
private int bitPlacement;
public Bsf(int input)
{
address = input & 0x007F;
bitPlacement = checkBitPlacement(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address);
result |= (1 << bitPlacement);
Memory.setRegister(address, result);
}
}

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@@ -1,31 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Btfsc extends BitOrientedCommandUtils implements Command
{
private final int address;
private int bitPlacement;
public Btfsc(int input)
{
address = input & 0x007F;
bitPlacement = checkBitPlacement(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address);
if((result & (1 << bitPlacement)) == 0) //Test if bit is clear
{
Nop nop = new Nop();
nop.execute();
}
}
}

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@@ -1,31 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Btfss extends BitOrientedCommandUtils implements Command
{
private final int address;
private int bitPlacement;
public Btfss(int input)
{
address = input & 0x007F;
bitPlacement = checkBitPlacement(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address);
if((result & (1 << bitPlacement)) > 0) //Test if bit is set
{
Nop nop = new Nop();
nop.execute();
}
}
}

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@@ -1,24 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
import de.darkress.pic16f84sim.microcontroller.Stack;
public class Call extends LiteralCommandUtils implements Command
{
private final int literal;
public Call(int input)
{
literal = input & 0x07FF;
}
@Override
public void execute()
{
Cycles.incCycles();
Stack.push(ProgramCounter.getPc() + 1);
ProgramCounter.setPcFrom11BitLiteral(literal);
Cycles.incCycles(); //Simulate nop and 2-Cycle instruction
}
}

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@@ -1,28 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Clrf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Clrf(int input)
{
address = input & 0x007F;
destinationBit = true;
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
final int result = 0;
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
}
}

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@@ -1,20 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Clrw extends FileRegisterCommandUtils implements Command
{
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
final int result = 0;
checkZeroBit(result);
Memory.workingRegister = result;
}
}

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@@ -1,24 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.*;
public class Clrwdt extends LiteralCommandUtils implements Command
{
public Clrwdt()
{
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
Memory.setRegister(0x03, Memory.getRegister(0x03) | 0x18);
if(Timer.getPrescalerAssignment()) {
Timer.resetTimeToTimerIncrease();
Watchdog.resetWatchdogTimer();
}
}
}

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@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Comf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Comf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = 255 - Memory.getRegister(address); // Get inverse of 8Bit value
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
}
}

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@@ -2,7 +2,7 @@ package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
public class LiteralCommandUtils public class CommandUtils
{ {
protected void checkZeroBit(int result) protected void checkZeroBit(int result)
{ {

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@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Decf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Decf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + 255; // Allow underflow
checkZeroBit(result);
writeToDestination(destinationBit, address, result % 256); // Catch underflow
}
}

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@@ -1,35 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Decfsz extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Decfsz(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + 255; // Allow underflow
checkZeroBit(result);
writeToDestination(destinationBit, address, result % 256); // Catch underflow
if((result % 256) == 0)
{
Nop nop = new Nop();
nop.execute();
}
}
}

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@@ -1,51 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Memory;
public class FileRegisterCommandUtils
{
protected void checkZeroBit(int result)
{
if((result % 256) == 0){
Memory.setZeroBit();
} else{
Memory.clearZeroBit();
}
}
protected void checkCarryBit(int result)
{
if(result > 255){
Memory.setCarryBit();
} else{
Memory.clearCarryBit();
}
}
protected void checkDigitCarryBit(int address)
{
int literal = Memory.getRegister(address);
if(((Memory.workingRegister & 0x0F) + (literal & 0x0F)) > 15){
Memory.setDigitCarryBit();
} else{
Memory.clearDigitCarryBit();
}
}
protected void writeToDestination(boolean destinationBit, int fileAddress, int result)
{
if(destinationBit)
{
//Store in FileRegister
Memory.setRegister(fileAddress, result);
} else {
//Store in WRegister
Memory.workingRegister = result;
}
}
protected boolean checkDestinationBit(int input)
{
return (input & 0x0080) == 0x0080;
}
}

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@@ -1,22 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Goto extends LiteralCommandUtils implements Command
{
private final int literal;
public Goto(int input)
{
literal = input & 0x07FF;
}
@Override
public void execute()
{
Cycles.incCycles();
ProgramCounter.setPcFrom11BitLiteral(literal);
Cycles.incCycles();
}
}

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@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Incf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Incf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + 1; // Allow underflow
checkZeroBit(result);
writeToDestination(destinationBit, address, result % 256); // Catch underflow
}
}

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@@ -1,35 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Incfsz extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Incfsz(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + 1;
checkZeroBit(result);
writeToDestination(destinationBit, address, result % 256);
if((result % 256) == 0)
{
Nop nop = new Nop();
nop.execute();
}
}
}

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@@ -1,10 +1,8 @@
package de.darkress.pic16f84sim.commands; package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Iorlw extends LiteralCommandUtils implements Command public class Iorlw extends CommandUtils implements Command
{ {
private final int literal; private final int literal;
@@ -15,8 +13,6 @@ public class Iorlw extends LiteralCommandUtils implements Command
@Override @Override
public void execute() public void execute()
{ {
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal | Memory.workingRegister; int result = literal | Memory.workingRegister;
checkZeroBit(result); checkZeroBit(result);

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@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Iorwf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Iorwf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) | Memory.workingRegister;
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
}
}

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@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Movf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Movf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address);
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
}
}

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@@ -1,10 +1,8 @@
package de.darkress.pic16f84sim.commands; package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Movlw extends LiteralCommandUtils implements Command public class Movlw extends CommandUtils implements Command
{ {
private final int literal; private final int literal;
@@ -16,8 +14,6 @@ public class Movlw extends LiteralCommandUtils implements Command
@Override @Override
public void execute() public void execute()
{ {
ProgramCounter.incPC();
Cycles.incCycles();
Memory.workingRegister = literal; Memory.workingRegister = literal;
} }
} }

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@@ -1,27 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Movwf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Movwf(int input)
{
address = input & 0x007F;
destinationBit = true;
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.workingRegister;
writeToDestination(destinationBit, address, result);
}
}

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@@ -1,16 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Nop extends LiteralCommandUtils implements Command
{
@Override
public void execute()
{
// Do nothing, just increment the PC
ProgramCounter.incPC();
Cycles.incCycles();
}
}

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@@ -1,18 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
import de.darkress.pic16f84sim.microcontroller.Stack;
public class Retfie extends LiteralCommandUtils implements Command
{
@Override
public void execute()
{
Cycles.incCycles();
Memory.setRegister(0x0B, Memory.getRegister(0x0B) | 0x80); //Set GIE
ProgramCounter.setPcFromStack(Stack.pop() + 1);
Cycles.incCycles(); // Simulate 2-Cycle Instruction
}
}

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@@ -1,25 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
import de.darkress.pic16f84sim.microcontroller.Stack;
public class Retlw extends LiteralCommandUtils implements Command
{
private final int literal;
public Retlw(int input)
{
literal = input & 0x00FF;
}
@Override
public void execute()
{
Cycles.incCycles();
Memory.workingRegister = literal;
ProgramCounter.setPcFromStack(Stack.pop());
Cycles.incCycles(); // Simulate 2-Cycle Instruction
}
}

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@@ -1,16 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
import de.darkress.pic16f84sim.microcontroller.Stack;
public class Return extends LiteralCommandUtils implements Command
{
@Override
public void execute()
{
Cycles.incCycles();
ProgramCounter.setPcFromStack(Stack.pop());
Cycles.incCycles(); // Simulate 2-Cycle Instruction
}
}

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@@ -1,37 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Rlf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Rlf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int register = Memory.getRegister(address);
int newCarry = register >>7;
int oldCarry = Memory.getCarryBit();
register = ((register <<1) + oldCarry) & 0xFF;
if(newCarry == 1)
{
Memory.setCarryBit();
} else if(newCarry == 0){
Memory.clearCarryBit();
}
writeToDestination(destinationBit, address, register);
}
}

View File

@@ -1,37 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Rrf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Rrf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int register = Memory.getRegister(address);
int newCarry = register & 0x01;
int oldCarry = Memory.getCarryBit();
register = (oldCarry << 7) + (register >>1);
if(newCarry == 1)
{
Memory.setCarryBit();
} else if(newCarry == 0){
Memory.clearCarryBit();
}
writeToDestination(destinationBit, address, register);
}
}

View File

@@ -1,10 +1,8 @@
package de.darkress.pic16f84sim.commands; package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Sublw extends LiteralCommandUtils implements Command public class Sublw extends CommandUtils implements Command
{ {
private final int literal; private final int literal;
@@ -36,8 +34,6 @@ public class Sublw extends LiteralCommandUtils implements Command
@Override @Override
public void execute() public void execute()
{ {
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal - Memory.workingRegister + 256; int result = literal - Memory.workingRegister + 256;
checkZeroBit(result); checkZeroBit(result);

View File

@@ -1,51 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Subwf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Subwf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
protected void checkCarryBit(int result)
{
if(result <= 255){
Memory.clearCarryBit();
} else{
Memory.setCarryBit();
}
}
@Override
protected void checkDigitCarryBit(int literal)
{
if(((literal & 0x0F) - (Memory.workingRegister & 0x0F)) < 0){
Memory.clearDigitCarryBit();
} else{
Memory.setDigitCarryBit();
}
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) - Memory.workingRegister + 256;
checkZeroBit(result);
checkCarryBit(result);
checkDigitCarryBit(Memory.getRegister(address));
writeToDestination(destinationBit, address, result % 256);
}
}

View File

@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Swapf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Swapf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = (Memory.getRegister(address) <<4) & 0xF0;
int tmp = Memory.getRegister(address) >>4;
result += tmp;
writeToDestination(destinationBit, address, result);
}
}

View File

@@ -1,10 +1,8 @@
package de.darkress.pic16f84sim.commands; package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory; import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Xorlw extends LiteralCommandUtils implements Command public class Xorlw extends CommandUtils implements Command
{ {
private final int literal; private final int literal;
@@ -15,8 +13,6 @@ public class Xorlw extends LiteralCommandUtils implements Command
@Override @Override
public void execute() public void execute()
{ {
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal ^ Memory.workingRegister; int result = literal ^ Memory.workingRegister;
checkZeroBit(result); checkZeroBit(result);

View File

@@ -1,29 +0,0 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Xorwf extends FileRegisterCommandUtils implements Command
{
private final int address;
private final boolean destinationBit;
public Xorwf(int input)
{
address = input & 0x007F;
destinationBit = checkDestinationBit(input);
}
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) ^ Memory.workingRegister;
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
}
}

View File

@@ -9,33 +9,47 @@ public class CommandDecoder
switch(input & 0x3F00) switch(input & 0x3F00)
{ {
case 0x700: case 0x700:
return new Addwf(input); //addwf();
break;
case 0x500: case 0x500:
return new Andwf(input); //andwf();
break;
case 0x900: case 0x900:
return new Comf(input); //comf();
break;
case 0x300: case 0x300:
return new Decf(input); //decf();
break;
case 0xB00: case 0xB00:
return new Decfsz(input); //decfsz();
break;
case 0xA00: case 0xA00:
return new Incf(input); //incf();
break;
case 0xF00: case 0xF00:
return new Incfsz(input); //incfsz();
break;
case 0x400: case 0x400:
return new Iorwf(input); //iorwf();
break;
case 0x800: case 0x800:
return new Movf(input); //movf();
break;
case 0xD00: case 0xD00:
return new Rlf(input); //rlf();
break;
case 0xC00: case 0xC00:
return new Rrf(input); //rrf();
break;
case 0x200: case 0x200:
return new Subwf(input); //subwf();
break;
case 0xE00: case 0xE00:
return new Swapf(input); //swapf();
break;
case 0x600: case 0x600:
return new Xorwf(input); //xorwf();
break;
case 0x3900: case 0x3900:
return new Andlw(input); return new Andlw(input);
case 0x3800: case 0x3800:
@@ -47,29 +61,38 @@ public class CommandDecoder
switch(input & 0x3F80) switch(input & 0x3F80)
{ {
case 0x180: case 0x180:
return new Clrf(input); //clrf();
break;
case 0x100: case 0x100:
return new Clrw(); //clrw();
break;
case 0x80: case 0x80:
return new Movwf(input); //movwf();
break;
} }
switch(input & 0x3C00) switch(input & 0x3C00)
{ {
case 0x1000: case 0x1000:
return new Bcf(input); //bcf();
break;
case 0x1400: case 0x1400:
return new Bsf(input); //bsf();
break;
case 0x1800: case 0x1800:
return new Btfsc(input); //btfsc();
break;
case 0x1C00: case 0x1C00:
return new Btfss(input); //btfss();
break;
} }
switch(input & 0x3E00) switch(input & 0x3E00)
{ {
case 0x3E00: case 0x3E00:
//addlw();
return new Addlw(input); return new Addlw(input);
//break;
case 0x3C00: case 0x3C00:
return new Sublw(input); return new Sublw(input);
} }
@@ -77,9 +100,11 @@ public class CommandDecoder
switch(input & 0x3800) switch(input & 0x3800)
{ {
case 0x2000: case 0x2000:
return new Call(input); //call();
break;
case 0x2800: case 0x2800:
return new Goto(input); //goto();
break;
} }
switch(input & 0x3C00) switch(input & 0x3C00)
@@ -87,27 +112,29 @@ public class CommandDecoder
case 0x3000: case 0x3000:
return new Movlw(input); return new Movlw(input);
case 0x3400: case 0x3400:
return new Retlw(input); //retlw();
break;
} }
if ((input | 0x0060) == 0x0060) if ((input | 0x0060) == 0x0060)
{ {
return new Nop(); //nop();
} }
if (input == 0x0064) if (input == 0x0064)
{ {
return new Clrwdt(); //clrwdt();
} }
if (input == 0x0009) if (input == 0x0009)
{ {
return new Retfie(); //retfie();
} }
if (input == 0x0008) if (input == 0x0008)
{ {
return new Return(); //return();
//This is the function name. Do not mistake this for a normal return!
} }
if (input == 0x0063) if (input == 0x0063)

View File

@@ -1,15 +0,0 @@
package de.darkress.pic16f84sim.microcontroller;
public class Cycles {
private static int cycles = 0;
public static void incCycles()
{
Timer.decreasePrescaler();
cycles++;
}
public static int getCycles() {
return cycles;
}
}

View File

@@ -1,13 +0,0 @@
package de.darkress.pic16f84sim.microcontroller;
public class Interrupt
{
private static boolean globalInterruptEnabled() {
return (Memory.getRegister(0x0B) & 0x80) == 0x80; // Check GIE
}
public static boolean checkTimerInterruptConditions() {
boolean timerInterruptEnabled = (Memory.getRegister(0x0B) & 0x20) == 0x20;
return globalInterruptEnabled() && timerInterruptEnabled;
}
}

View File

@@ -4,13 +4,6 @@ import java.util.Arrays;
public class Memory public class Memory
{ {
public static void initMemory()
{
Memory.memory[0x81] = 0xFF; //Option
Memory.memory[0x85] = 0x1F; //TrisA
Memory.memory[0x86] = 0xFF; //TrisB
Memory.setRegister(0x03, 0x18); //Status
}
private static final int MEMORY_SIZE = 0xFF; //Addressable Memory private static final int MEMORY_SIZE = 0xFF; //Addressable Memory
public static int workingRegister = 0; public static int workingRegister = 0;
private static final int[] memory = new int[MEMORY_SIZE]; private static final int[] memory = new int[MEMORY_SIZE];
@@ -54,30 +47,18 @@ public class Memory
setDataFromIndirectAddress(indirectAddress, data); setDataFromIndirectAddress(indirectAddress, data);
return; return;
} }
if(address == 0x01 && !Timer.getPrescalerAssignment()) //Reset PrescalerCounter if change on Option or Timer
// Register
{
Timer.resetTimeToTimerIncrease();
Timer.setCyclesToTimerIncrease(Timer.getCyclesToTimerIncrease() - 1); //Decrease by one to account for
// this command execution
}
if((Arrays.stream(bank0UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 0) if((Arrays.stream(bank0UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 0)
{ {
memory[address] = data; memory[address] = data;
return; return;
} }
if((Arrays.stream(bank0UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 1) //bank0 if((Arrays.stream(bank1UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 1)
// because of 7 Bit address
{ {
memory[address + 128] = data; memory[address + 128] = data;
return; return;
} }
memory[address] = data; memory[address] = data;
memory[address + 128] = data; //Ensure data is written to both banks to simulate mapping memory[address + 128] = data; //Ensure data is written to both banks to simulate mapping
if(address == 0x2) //Check if PCL is destination
{
ProgramCounter.loadPc();
}
} }
private static int getDataFromIndirectAddress(int address) private static int getDataFromIndirectAddress(int address)
@@ -87,12 +68,6 @@ public class Memory
private static void setDataFromIndirectAddress(int address, int data) private static void setDataFromIndirectAddress(int address, int data)
{ {
if((address == 0x81 || address == 0x01) && !Timer.getPrescalerAssignment()) //Reset PrescalerCounter if change on Option or Timer Register
{
Timer.resetTimeToTimerIncrease();
Timer.setCyclesToTimerIncrease(Timer.getCyclesToTimerIncrease() - 1); //Decrease by one to account for
// this command execution
}
if((Arrays.stream(bank0UniqueSpecialRegister).anyMatch(x -> x == address)) || (Arrays.stream(bank1UniqueSpecialRegister).anyMatch(x -> x == address))) if((Arrays.stream(bank0UniqueSpecialRegister).anyMatch(x -> x == address)) || (Arrays.stream(bank1UniqueSpecialRegister).anyMatch(x -> x == address)))
{ {
memory[address] = data; memory[address] = data;
@@ -111,55 +86,11 @@ public class Memory
return 1; return 1;
} }
public static int getFSR() private static int getFSR()
{ {
return memory[0x4]; return memory[0x4];
} }
public static int getPCL()
{
return memory[0x2];
}
public static void setPCL(int data)
{
memory[0x2] = data;
memory[0x82] = data;
}
public static int getPCLATH()
{
return memory[0xA] & 0x1F;
}
public static void setPCLATH(int data)
{
memory[0xA] = data & 0x1F;
memory[0x8A] = data & 0x1F;
}
public static int getOption()
{
return memory[0x81];
}
public static int getPortB() {
return memory[0x06];
}
public static int getPortA() {
return memory[0x05] & 0x1F;
}
public static int getTimer()
{
return memory[0x01];
}
public static void setTimer(int data)
{
memory[0x01] = data;
}
public static boolean getZeroBit() public static boolean getZeroBit()
{ {
return (memory[0x03] & 0x04) == 0x04; return (memory[0x03] & 0x04) == 0x04;
@@ -168,7 +99,6 @@ public class Memory
public static void setZeroBit() public static void setZeroBit()
{ {
memory[0x03] |= 0x04; memory[0x03] |= 0x04;
memory[0x83] |= 0x04;
} }
public static void clearZeroBit() public static void clearZeroBit()
@@ -184,7 +114,6 @@ public class Memory
public static void setDigitCarryBit() public static void setDigitCarryBit()
{ {
memory[0x03] |= 0x02; memory[0x03] |= 0x02;
memory[0x83] |= 0x02;
} }
public static void clearDigitCarryBit() public static void clearDigitCarryBit()
@@ -192,19 +121,14 @@ public class Memory
memory[0x03] &= 0xFD; memory[0x03] &= 0xFD;
} }
public static int getCarryBit() public static boolean getCarryBit()
{ {
if((memory[0x03] & 0x01) == 0x01) return (memory[0x03] & 0x01) == 0x01;
{
return 1;
}
else return 0;
} }
public static void setCarryBit() public static void setCarryBit()
{ {
memory[0x03] |= 0x01; memory[0x03] |= 0x01;
memory[0x83] |= 0x01;
} }
public static void clearCarryBit() public static void clearCarryBit()

View File

@@ -4,44 +4,20 @@ public class ProgramCounter
//This class is not actual part of the µC. It is a storage for the current value of the PC //This class is not actual part of the µC. It is a storage for the current value of the PC
{ {
private static int pc = 0; private static int PC = 0;
public static int getPc() public static int getPC()
{ {
return pc; return PC;
} }
public static void setPcFrom11BitLiteral(int data) public static void setPC(int PC)
{ {
int pcl = data & 0x00FF; ProgramCounter.PC = PC;
int pch = Memory.getPCLATH();
pch = ((pch & 0xF8) <<8) + (data & 0x700);
Memory.setPCL(pcl);
pc = (pch) + pcl;
} }
public static void setPcFromStack(int stack) public static void incPC()
{ {
pc = stack; PC++;
Memory.setPCL(pc & 0x00FF);
}
public static void loadPc()
{
pc = (Memory.getPCLATH() <<8) + Memory.getPCL();
}
public static void incPC() //is called after every instruction execution
{
pc++;
Memory.setPCL(pc & 0x00FF);
}
public static void setProgramCounter(int value) {
if(value <= 0xFF && value >= 0)
{
pc = value;
Memory.setPCL(pc);
}
} }
} }

View File

@@ -14,10 +14,15 @@ public class Stack
public static int pop() public static int pop()
{ {
int tmp = stack[stackPointer];
pointPrevious(); pointPrevious();
return stack[stackPointer]; return tmp;
} }
public static int peek()
{
return stack[(stackPointer + 7) % 8]; //Get TopOfStack -1 +8 = 7 and modulo 8 to avoid IndexOutOfBound
}
private static void pointNext() private static void pointNext()
{ {

View File

@@ -1,82 +0,0 @@
package de.darkress.pic16f84sim.microcontroller;
public class Timer
{
public static int getCyclesToTimerIncrease()
{
return cyclesToTimerIncrease;
}
public static void setCyclesToTimerIncrease(int cyclesToTimerIncrease)
{
Timer.cyclesToTimerIncrease = cyclesToTimerIncrease;
}
private static int cyclesToTimerIncrease = 1;
private static boolean timerEnabled()
{
return (Memory.getOption() & 0x20) != 0x20;
}
public static void resetTimeToTimerIncrease()
{
cyclesToTimerIncrease = getPrescalerFactor();
}
public static boolean getPrescalerAssignment() {
return (Memory.getOption() & 0x08) == 0x08;
}
private static int getPrescalerFactor() {
final int MULTIPLIER = 2;
int prescalerPower = Memory.getOption() & 0x07;
int prescaler = (int)Math.pow(2, prescalerPower);
if(!getPrescalerAssignment())
{
return prescaler * MULTIPLIER;
}
return prescaler;
}
private static void increaseTimerRegister()
{
int timerRegister = Memory.getRegister(0x01);
timerRegister = (timerRegister + 1) % 256;
if(timerRegister == 0) //check for timer Overflow --> interrupt
{
System.out.println("Timer Overflow");
Memory.setRegister(0x0B, Memory.getRegister(0x0B) | 0x04); //set T0IF
if(Interrupt.checkTimerInterruptConditions())
{
Stack.push(ProgramCounter.getPc());
ProgramCounter.setProgramCounter(0x04); // Interrupt Vector
}
}
Memory.setTimer(timerRegister);
}
public static void decreasePrescaler()
{
if(getPrescalerAssignment()) { // Assigned to WatchdogTimer
cyclesToTimerIncrease--;
if(cyclesToTimerIncrease == 0) {
resetTimeToTimerIncrease();
Watchdog.decreaseWatchdogTimer();
}
} else {
Watchdog.decreaseWatchdogTimer();
}
if(timerEnabled()) {
if(!getPrescalerAssignment()) { // Assigned to timer0
cyclesToTimerIncrease--;
if(cyclesToTimerIncrease == 0) {
resetTimeToTimerIncrease();
Timer.increaseTimerRegister();
}
} else {
Timer.increaseTimerRegister();
}
}
}
}

View File

@@ -1,37 +0,0 @@
package de.darkress.pic16f84sim.microcontroller;
public class Watchdog
{
private static int watchdogTimer = 18000;
public static int getWatchdogTimer()
{
return watchdogTimer;
}
public static void resetWatchdogTimer() {
watchdogTimer = 18000;
}
public static void decreaseWatchdogTimer()
{
watchdogTimer--;
checkWatchdog();
}
private static void checkWatchdog()
{
if(watchdogTimer == 0)
{
System.out.println("Watchdog Time-Out");
Memory.setRegister(0x03, Memory.getRegister(0x03) & 0xEF); //Clear !TO in StatusReg
}
}
public static void resetProgram()
{
Memory.setRegister(0x03, Memory.getRegister(0x03) | 0x10); //Set !T0 in StatusReg
ProgramCounter.setProgramCounter(0);
watchdogTimer = 18000;
}
}

View File

@@ -1,8 +1,5 @@
package de.darkress.pic16f84sim.parser; package de.darkress.pic16f84sim.parser;
import de.darkress.pic16f84sim.commands.Command;
import de.darkress.pic16f84sim.decoder.CommandDecoder;
import java.io.File; import java.io.File;
import java.io.FileNotFoundException; import java.io.FileNotFoundException;
import java.util.ArrayList; import java.util.ArrayList;
@@ -11,9 +8,9 @@ import java.util.Scanner;
public class Parser public class Parser
{ {
public static Command[] parser(String filePath) public static List<Integer> parser(String filePath)
{ {
ArrayList<String> instructions = new ArrayList<>(); ArrayList<Integer> program = new ArrayList<>();
try { try {
File file = new File(filePath); File file = new File(filePath);
Scanner scanner = new Scanner(file); Scanner scanner = new Scanner(file);
@@ -22,10 +19,8 @@ public class Parser
if(!data.startsWith(" ")) if(!data.startsWith(" "))
{ {
String commandAndParametersString = "0x" + data.split(" ")[1]; String commandAndParametersString = "0x" + data.split(" ")[1];
String instructionAddress = "0x" + data.split(" ")[0]; int commandAndParameters = Integer.decode(commandAndParametersString);
//int commandAndParameters = Integer.decode(commandAndParametersString); program.add(commandAndParameters);
//program.add(commandAndParameters);
instructions.add(instructionAddress + ", " + commandAndParametersString);
} }
} }
scanner.close(); scanner.close();
@@ -33,16 +28,6 @@ public class Parser
System.out.println("An error occurred."); System.out.println("An error occurred.");
e.printStackTrace(); e.printStackTrace();
} }
Command[] program = new Command[1024];
for(int i = 0; i < instructions.size(); i++)
{
int instructionAddress = Integer.decode(instructions.get(i).split(", ")[0]);
int instruction = Integer.decode(instructions.get(i).split(", ")[1]);
program[instructionAddress] = CommandDecoder.decode(instruction);
}
return program; return program;
} }
} }