translate keyboard scancode

kernel/Makefile

@@ -7,7 +7,7 @@ CC = gcc
 ASMC = nasm
 LD = ld
 
-CFLAGS = -ffreestanding -fshort-wchar
+CFLAGS = -ffreestanding -fshort-wchar -mno-red-zone
 ASMFLAGS = 
 LDFLAGS = -T $(LDS) -static -Bsymbolic -nostdlib
 

kernel/src/BasicRenderer.cpp

@@ -25,6 +25,15 @@ void BasicRenderer::PutChar(char chr, unsigned int xOff, unsigned int yOff) {
 	}
 }
 
+void BasicRenderer::PutChar(char chr) {
+	PutChar(chr, cursorPosition.x, cursorPosition.y);
+	cursorPosition.x += 8;
+	if (cursorPosition.x + 8 > targetFramebuffer->Width) {
+		cursorPosition.x = 0;
+		cursorPosition.y += 16;
+	}
+}
+
 void BasicRenderer::Print(const char* str) {
 	unsigned int x = 0;
 	char* chr = (char*)str;
@@ -42,7 +51,7 @@ void BasicRenderer::Print(const char* str) {
 	}
 }
 
-void BasicRenderer::Clear(uint32_t colour) {
+void BasicRenderer::Clear() {
 	uint64_t fbBase = (uint64_t)targetFramebuffer->BaseAddress;
     uint64_t bytesPerScanline = targetFramebuffer->PixelsPerScanline * 4;
     uint64_t fbHeight = targetFramebuffer->Height;
@@ -51,11 +60,39 @@ void BasicRenderer::Clear(uint32_t colour) {
     for (int verticalScanline = 0; verticalScanline < fbHeight; verticalScanline ++){
         uint64_t pixPtrBase = fbBase + (bytesPerScanline * verticalScanline);
         for (uint32_t* pixPtr = (uint32_t*)pixPtrBase; pixPtr < (uint32_t*)(pixPtrBase + bytesPerScanline); pixPtr ++){
-            *pixPtr = colour;
+            *pixPtr = ClearColour;
         }
     }
 }
 
+void BasicRenderer::ClearChar(){
+
+    if (cursorPosition.x == 0){
+        cursorPosition.x = targetFramebuffer->Width;
+        cursorPosition.y -= 16;
+        if (cursorPosition.y < 0) cursorPosition.y = 0;
+    }
+
+    unsigned int xOff = cursorPosition.x;
+    unsigned int yOff = cursorPosition.y;
+
+    unsigned int* pixPtr = (unsigned int*)targetFramebuffer->BaseAddress;
+    for (unsigned long y = yOff; y < yOff + 16; y++){
+        for (unsigned long x = xOff - 8; x < xOff; x++){
+                    *(unsigned int*)(pixPtr + x + (y * targetFramebuffer->PixelsPerScanline)) = ClearColour;
+        }
+    }
+
+    cursorPosition.x -= 8;
+
+    if (cursorPosition.x < 0){
+        cursorPosition.x = targetFramebuffer->Width;
+        cursorPosition.y -= 16;
+        if (cursorPosition.y < 0) cursorPosition.y = 0;
+    }
+
+}
+
 void BasicRenderer::Next() {
 	cursorPosition.x = 0;
 	cursorPosition.y += 16;

kernel/src/BasicRenderer.h

@@ -11,9 +11,12 @@ class BasicRenderer {
 		Framebuffer* targetFramebuffer;
 		PSF1_FONT* PSF1_Font;
 		unsigned int Colour;
+		unsigned int ClearColour;
 		void Print(const char* str);
 		void PutChar(char chr, unsigned int xOff, unsigned int yOff);
-		void Clear(uint32_t colour);
+		void PutChar(char chr);
+		void ClearChar();
+		void Clear();
 		void Next();
 };
 

kernel/src/interrupts/interrupts.cpp

@@ -1,6 +1,7 @@
 #include "interrupts.h"
 #include "../panic.h"
 #include "../IO.h"
+#include "../userinput/keyboard.h"
 
 __attribute__((interrupt)) void PageFault_Handler(struct interrupt_frame* frame) {
 	Panic("Page Fault");
@@ -18,10 +19,10 @@ __attribute__((interrupt)) void GPFault_Handler(struct interrupt_frame* frame) {
 }
 
 __attribute__((interrupt)) void KeyboardInterrupt_Handler(struct interrupt_frame* frame) {
-	GlobalRenderer->Print("A");
-
 	uint8_t scancode = inb(0x60);
 
+	HandleKeyboard(scancode);
+
 	PIC_EndMaster();
 }
 

kernel/src/kernel.cpp

@@ -4,7 +4,8 @@ extern "C" void _start(BootInfo* bootInfo) {
 	KernelInfo kernelInfo = InitializeKernel(bootInfo);
 	PageTableManager* pageTableManager = kernelInfo.pageTableManager;
 
-	GlobalRenderer->Clear(0xFF191919);
+	GlobalRenderer->ClearColour = 0xFF191919;
+	GlobalRenderer->Clear();
 	GlobalRenderer->Print("Kernel initialized successfully!");
 	GlobalRenderer->Next();
 	

kernel/src/math.h

@@ -1,6 +1,6 @@
 #pragma once
 
 struct Point {
-	unsigned int x;
-	unsigned int y;
+	long x;
+	long y;
 };

kernel/src/paging/PageFrameAllocator.cpp

@@ -33,7 +33,7 @@ void PageFrameAllocator::ReadEFIMemoryMap(EFI_MEMORY_DESCRIPTOR* mMap, size_t mM
     InitBitmap(bitmapSize, largestFreeMemSeg);
 
     // lock pages of bitmap
-	LockPages(&PageBitmap, PageBitmap.Size / 4096 + 1);
+	LockPages(PageBitmap.Buffer, PageBitmap.Size / 4096 + 1);
 
     //reserve pages of unsable/reserverd memory
 	for (int i = 0; i < mMapEntries; i++) {

kernel/src/panic.cpp

@@ -2,7 +2,8 @@
 #include "BasicRenderer.h"
 
 void Panic(const char* panicMessage) {
-	GlobalRenderer->Clear(0xFF000000);
+	GlobalRenderer->ClearColour = 0xFF000000;
+	GlobalRenderer->Clear();
 	GlobalRenderer->Colour = 0xFFFF0000;
 	GlobalRenderer->cursorPosition = {0,0};
 	GlobalRenderer->Print("PANIC!!! ");

kernel/src/userinput/kbScancodeTranslation.cpp

@@ -0,0 +1,31 @@
+#include "kbScancodeTranslation.h"
+
+namespace QWERTYKeyboard {
+	const char ASCIITable[] = {
+         0 ,  0 , '1', '2',
+        '3', '4', '5', '6',
+        '7', '8', '9', '0',
+        '-', '=',  0 ,  0 ,
+        'q', 'w', 'e', 'r',
+        't', 'y', 'u', 'i',
+        'o', 'p', '[', ']',
+         0 ,  0 , 'a', 's',
+        'd', 'f', 'g', 'h',
+        'j', 'k', 'l', ';',
+        '\'','`',  0 , '\\',
+        'z', 'x', 'c', 'v',
+        'b', 'n', 'm', ',',
+        '.', '/',  0 , '*',
+         0 , ' '
+    };
+
+	char Translate(uint8_t scancode, bool uppercase) {
+		if (scancode > 58) return 0; // longer than the length of our ascii array
+
+		if (uppercase) {
+			return ASCIITable[scancode] - 32;
+		}
+
+		return ASCIITable[scancode];
+	}
+}

kernel/src/userinput/kbScancodeTranslation.h

@@ -0,0 +1,15 @@
+#pragma once
+#include <stdint.h>
+
+namespace QWERTYKeyboard {
+
+	#define LeftShift 0x2A
+	#define RightShift 0x36
+	#define Enter 0x1C
+	#define Backspace 0x0E
+	#define Spacebar 0x39
+
+	extern const char ASCIITable[];
+	char Translate(uint8_t scancode, bool uppercase);
+}
+

kernel/src/userinput/keyboard.cpp

@@ -0,0 +1,36 @@
+#include "keyboard.h"
+
+bool isLeftShiftPressed = false;
+bool isRightShiftPressed = false;
+
+void HandleKeyboard(uint8_t scancode) {
+	switch (scancode) {
+		case LeftShift:
+			isLeftShiftPressed = true;
+			return;
+		case LeftShift + 0x80:
+			isLeftShiftPressed = false;
+			return;
+		case RightShift:
+			isRightShiftPressed = true;
+			return;
+		case RightShift + 0x80:
+			isRightShiftPressed = false;
+			return;
+		case Enter:
+			GlobalRenderer->Next();
+			return;
+		case Spacebar:
+			GlobalRenderer->PutChar(' ');
+			return;
+		case Backspace:
+			GlobalRenderer->ClearChar();
+			break;
+	}
+
+	char ascii = QWERTYKeyboard::Translate(scancode, isLeftShiftPressed || isRightShiftPressed);
+
+	if (ascii != 0) {
+		GlobalRenderer->PutChar(ascii);
+	}
+}

kernel/src/userinput/keyboard.h

@@ -0,0 +1,6 @@
+#pragma once
+#include <stdint.h>
+#include "kbScancodeTranslation.h"
+#include "../BasicRenderer.h"
+
+void HandleKeyboard(uint8_t scancode);