Darkress/pic16f84-sim
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Somewhat working timer. Increases one instruction too early

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Darkress
2023-06-16 22:05:30 +02:00
parent 324912080d
commit dbf6de1027
4 changed files with 55 additions and 14 deletions
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30
de/darkress/pic16f84sim/microcontroller/Memory.java
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@@ -4,6 +4,13 @@ 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];
@@ -52,13 +59,18 @@ public class Memory
memory[address] = data;
return;
}
if((Arrays.stream(bank1UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 1)
if((Arrays.stream(bank0UniqueSpecialRegister).anyMatch(x -> x == address)) && getRegisterBank() == 1) //bank0
// because of 7 Bit address
{
memory[address + 128] = data;
return;
}
memory[address] = data;
memory[address + 128] = data; //Ensure data is written to both banks to simulate mapping
if(address == 0x01) //Reset PrescalerCounter if change on Option or Timer Register
{
Timer.resetTimeToTimerIncrease();
}
if(address == 0x2) //Check if PCL is destination
{
ProgramCounter.loadPc();
@@ -79,7 +91,11 @@ 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
if(address == 0x81 || address == 0x01) //Reset PrescalerCounter if change on Option or Timer Register
{
Timer.resetTimeToTimerIncrease();
}
if(address == 0x2 || address == 0x82) //Check if PCL is destination
{
ProgramCounter.loadPc();
}
@@ -126,6 +142,16 @@ public class Memory
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;