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Author SHA1 Message Date
Darkress
30deff96a8 implemented Movwf instruction 2023-06-05 23:58:15 +02:00
44 changed files with 60 additions and 669 deletions

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@@ -1,34 +1,23 @@
package de.darkress.pic16f84sim;
import de.darkress.pic16f84sim.cli.Cli;
import de.darkress.pic16f84sim.commands.Command;
import de.darkress.pic16f84sim.decoder.CommandDecoder;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
import de.darkress.pic16f84sim.microcontroller.Watchdog;
import de.darkress.pic16f84sim.parser.Parser;
import java.util.concurrent.TimeUnit;
import java.util.ArrayList;
class Main
{
public static void main(String[] args) throws InterruptedException {
public static void main(String[] args) {
Command[] program = Parser.parser("de/darkress/pic16f84sim/TestPrograms/TPicSim11.LST");
Memory.initMemory();
while(ProgramCounter.getPc() < 1024)
ArrayList<Command> program = new ArrayList<>();
Memory.workingRegister = 0x1A;
Memory.setRegister(0x14, 0x1B);
program.add(CommandDecoder.decode(0x0094));
for(int i = 0; i < program.size(); i++)
{
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.showRegisters();
program.get(ProgramCounter.getPc()).execute();
}
}
}

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@@ -1,36 +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 showRegisters() {
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");
}
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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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -16,8 +15,6 @@ public class Addlw extends LiteralCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal + Memory.workingRegister;
checkZeroBit(result);
@@ -25,5 +22,6 @@ public class Addlw extends LiteralCommandUtils implements Command
checkDigitCarryBit(literal);
Memory.workingRegister = result % 256;
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,8 +17,6 @@ public class Addwf extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + Memory.workingRegister;
checkZeroBit(result);
@@ -27,5 +24,6 @@ public class Addwf extends FileRegisterCommandUtils implements Command
checkDigitCarryBit(address);
writeToDestination(destinationBit, address, result);
ProgramCounter.incPC();
}
}

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@@ -1,8 +1,6 @@
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 Andlw extends LiteralCommandUtils implements Command
{
@@ -15,8 +13,6 @@ public class Andlw extends LiteralCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal & Memory.workingRegister;
checkZeroBit(result);

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,12 +17,11 @@ public class Andwf extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) & Memory.workingRegister;
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
ProgramCounter.incPC();
}
}

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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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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
import de.darkress.pic16f84sim.microcontroller.Stack;
@@ -16,9 +15,7 @@ public class Call extends LiteralCommandUtils implements Command
@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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@@ -1,6 +1,6 @@
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 Clrf extends FileRegisterCommandUtils implements Command
@@ -17,12 +17,11 @@ public class Clrf extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
final int result = 0;
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -9,12 +8,11 @@ public class Clrw extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
final int result = 0;
checkZeroBit(result);
Memory.workingRegister = result;
ProgramCounter.incPC();
}
}

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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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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,12 +17,11 @@ public class Comf extends FileRegisterCommandUtils implements Command
@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);
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,12 +17,11 @@ public class Decf extends FileRegisterCommandUtils implements Command
@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
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,8 +17,6 @@ public class Decfsz extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + 255; // Allow underflow
checkZeroBit(result);
@@ -31,5 +28,6 @@ public class Decfsz extends FileRegisterCommandUtils implements Command
Nop nop = new Nop();
nop.execute();
}
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Goto extends LiteralCommandUtils implements Command
@@ -15,8 +14,6 @@ public class Goto extends LiteralCommandUtils implements Command
@Override
public void execute()
{
Cycles.incCycles();
ProgramCounter.setPcFrom11BitLiteral(literal);
Cycles.incCycles();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,12 +17,11 @@ public class Incf extends FileRegisterCommandUtils implements Command
@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
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,8 +17,6 @@ public class Incfsz extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) + 1;
checkZeroBit(result);
@@ -31,5 +28,6 @@ public class Incfsz extends FileRegisterCommandUtils implements Command
Nop nop = new Nop();
nop.execute();
}
ProgramCounter.incPC();
}
}

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@@ -1,8 +1,6 @@
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 Iorlw extends LiteralCommandUtils implements Command
{
@@ -15,8 +13,6 @@ public class Iorlw extends LiteralCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal | Memory.workingRegister;
checkZeroBit(result);

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,12 +17,11 @@ public class Iorwf extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address) | Memory.workingRegister;
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,12 +17,11 @@ public class Movf extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.getRegister(address);
checkZeroBit(result);
writeToDestination(destinationBit, address, result);
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -16,8 +15,7 @@ public class Movlw extends LiteralCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
Memory.workingRegister = literal;
ProgramCounter.incPC();
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.Memory;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
@@ -18,10 +17,9 @@ public class Movwf extends FileRegisterCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = Memory.workingRegister;
writeToDestination(destinationBit, address, result);
ProgramCounter.incPC();
}
}

View File

@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
public class Nop extends LiteralCommandUtils implements Command
@@ -11,6 +10,5 @@ public class Nop extends LiteralCommandUtils implements Command
{
// Do nothing, just increment the PC
ProgramCounter.incPC();
Cycles.incCycles();
}
}

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@@ -1,6 +1,5 @@
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;
@@ -17,9 +16,7 @@ public class Retlw extends LiteralCommandUtils implements Command
@Override
public void execute()
{
Cycles.incCycles();
Memory.workingRegister = literal;
ProgramCounter.setPcFromStack(Stack.pop());
Cycles.incCycles(); // Simulate 2-Cycle Instruction
}
}

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@@ -1,6 +1,5 @@
package de.darkress.pic16f84sim.commands;
import de.darkress.pic16f84sim.microcontroller.Cycles;
import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
import de.darkress.pic16f84sim.microcontroller.Stack;
@@ -9,8 +8,6 @@ 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);
}
}

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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 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);
}
}

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@@ -1,8 +1,6 @@
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 Sublw extends LiteralCommandUtils implements Command
{
@@ -36,8 +34,6 @@ public class Sublw extends LiteralCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal - Memory.workingRegister + 256;
checkZeroBit(result);

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@@ -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);
}
}

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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 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);
}
}

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@@ -1,8 +1,6 @@
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 Xorlw extends LiteralCommandUtils implements Command
{
@@ -15,8 +13,6 @@ public class Xorlw extends LiteralCommandUtils implements Command
@Override
public void execute()
{
ProgramCounter.incPC();
Cycles.incCycles();
int result = literal ^ Memory.workingRegister;
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 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

@@ -27,15 +27,20 @@ public class CommandDecoder
case 0x800:
return new Movf(input);
case 0xD00:
return new Rlf(input);
//rlf();
break;
case 0xC00:
return new Rrf(input);
//rrf();
break;
case 0x200:
return new Subwf(input);
//subwf();
break;
case 0xE00:
return new Swapf(input);
//swapf();
break;
case 0x600:
return new Xorwf(input);
//xorwf();
break;
case 0x3900:
return new Andlw(input);
case 0x3800:
@@ -57,19 +62,25 @@ public class CommandDecoder
switch(input & 0x3C00)
{
case 0x1000:
return new Bcf(input);
//bcf();
break;
case 0x1400:
return new Bsf(input);
//bsf();
break;
case 0x1800:
return new Btfsc(input);
//btfsc();
break;
case 0x1C00:
return new Btfss(input);
//btfss();
break;
}
switch(input & 0x3E00)
{
case 0x3E00:
//addlw();
return new Addlw(input);
//break;
case 0x3C00:
return new Sublw(input);
}
@@ -97,7 +108,7 @@ public class CommandDecoder
if (input == 0x0064)
{
return new Clrwdt();
//clrwdt();
}
if (input == 0x0009)

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

@@ -4,13 +4,6 @@ import java.util.Arrays;
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
public static int workingRegister = 0;
private static final int[] memory = new int[MEMORY_SIZE];
@@ -54,20 +47,12 @@ public class Memory
setDataFromIndirectAddress(indirectAddress, data);
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)
{
memory[address] = data;
return;
}
if((Arrays.stream(bank0UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 1) //bank0
// because of 7 Bit address
if((Arrays.stream(bank1UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 1)
{
memory[address + 128] = data;
return;
@@ -87,12 +72,6 @@ public class Memory
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)))
{
memory[address] = data;
@@ -100,6 +79,10 @@ public class Memory
}
memory[address % 128] = data; // else: Registers.Registers which are mapped
memory[address % 128 + 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 getRegisterBank()
@@ -111,7 +94,7 @@ public class Memory
return 1;
}
public static int getFSR()
private static int getFSR()
{
return memory[0x4];
}
@@ -138,21 +121,6 @@ public class Memory
memory[0x8A] = data & 0x1F;
}
public static int getOption()
{
return memory[0x81];
}
public static int getTimer()
{
return memory[0x01];
}
public static void setTimer(int data)
{
memory[0x01] = data;
}
public static boolean getZeroBit()
{
return (memory[0x03] & 0x04) == 0x04;
@@ -185,13 +153,9 @@ public class Memory
memory[0x03] &= 0xFD;
}
public static int getCarryBit()
public static boolean getCarryBit()
{
if((memory[0x03] & 0x01) == 0x01)
{
return 1;
}
else return 0;
return (memory[0x03] & 0x01) == 0x01;
}
public static void setCarryBit()

View File

@@ -36,9 +36,4 @@ public class ProgramCounter
pc++;
Memory.setPCL(pc & 0x00FF);
}
public static void resetProgramCounter() {
pc = 0;
Memory.setPCL(0x0);
}
}

View File

@@ -18,6 +18,10 @@ public class Stack
return stack[stackPointer];
}
public static int peek()
{
return stack[(stackPointer + 7) % 8]; //Get TopOfStack -1 +8 = 7 and modulo 8 to avoid IndexOutOfBound
}
private static void pointNext()
{

View File

@@ -1,76 +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.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.resetProgramCounter();
watchdogTimer = 18000;
}
}

View File

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