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Commit 8b41061

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9 files changed

+298
-7
lines changed

‎os/cpu/timer.c‎

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/*
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drippleMini OS (C) 2021
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LICENSE @ ROOT DIRECTORY
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github_url: https://github.com/BaseProgrammer/drippleMini
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*/
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#include "timer.h"
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#include "isr.h"
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#include "../drivers/screen.h"
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#include "../kernel/util.h"
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u32 tick = 0;
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static void timer_callback(registers_t regs)
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{
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tick++;
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kprint("Tick: ");
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char tick_ascii[256];
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asciiIntConverter(tick, tick_ascii);
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kprint(tick_ascii);
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kprint("\n");
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}
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void init_timer(u32 frequency)
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{
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register_interrupt_handler(IRQ0, timer_callback);
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// PIT value: hardware clock at 1193180 Hz
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u32 divisor = 1193180 / frequency;
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u8 low = (u8)(divisor & 0xFFF);
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u8 high = (u8)((divisor >> 8) & 0xFFF);
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port_byte_out(0x43, 0x36);
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port_byte_out(0x40, low);
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port_byte_out(0x40, high);
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}

‎os/cpu/timer.h‎

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/*
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drippleMini OS (C) 2021
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LICENSE @ ROOT DIRECTORY
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github_url: https://github.com/BaseProgrammer/drippleMini
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*/
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#ifndef TIMER_H
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#define TIMER_H
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#include "../kernel/util.h"
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void init_timer(u32 frequency);
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#endif

‎os/drivers/keyboard.c‎

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#include "keyboard.h"
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#include "ports.h"
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#include "../cpu/isr.h"
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#include "screen.h"
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static void keyboard_callback(registers_t regs)
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{
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u8 scancode = port_byte_in(0x60);
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char *sc_ascii;
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int_to_ascii(scancode, sc_ascii);
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kprint("Keyboard scancode: ");
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kprint(sc_ascii);
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kprint(", ");
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print_letter(scancode);
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kprint("\n");
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}
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void init_keyboard()
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{
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register_interrupt_handler(IRQ1, keyboard_callback);
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}
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void print_letter(u8 scancode)
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{
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// Scancodes would be the keys inputted
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switch (scancode)
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{
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case 0x0:
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kprint("ERROR");
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break;
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case 0x1:
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kprint("ESC");
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break;
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case 0x2:
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kprint("1");
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break;
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case 0x3:
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kprint("2");
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break;
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case 0x4:
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kprint("3");
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break;
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case 0x5:
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kprint("4");
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break;
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case 0x6:
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kprint("5");
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break;
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case 0x7:
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kprint("6");
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break;
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case 0x8:
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kprint("7");
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break;
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case 0x9:
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kprint("8");
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break;
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case 0x0A:
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kprint("9");
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break;
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case 0x0B:
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kprint("0");
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break;
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case 0x0C:
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kprint("-");
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break;
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case 0x0D:
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kprint("+");
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break;
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case 0x0E:
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kprint("Backspace");
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break;
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case 0x0F:
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kprint("Tab");
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break;
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case 0x10:
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kprint("Q");
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break;
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case 0x11:
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kprint("W");
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break;
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case 0x12:
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kprint("E");
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break;
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case 0x13:
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kprint("R");
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break;
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case 0x14:
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kprint("T");
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break;
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case 0x15:
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kprint("Y");
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break;
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case 0x16:
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kprint("U");
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break;
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case 0x17:
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kprint("I");
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break;
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case 0x18:
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kprint("O");
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break;
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case 0x19:
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kprint("P");
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break;
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case 0x1A:
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kprint("[");
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break;
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case 0x1B:
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kprint("]");
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break;
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case 0x1C:
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kprint("ENTER");
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break;
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case 0x1D:
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kprint("LCtrl");
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break;
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case 0x1E:
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kprint("A");
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break;
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case 0x1F:
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kprint("S");
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break;
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case 0x20:
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kprint("D");
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break;
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case 0x21:
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kprint("F");
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break;
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case 0x22:
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kprint("G");
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break;
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case 0x23:
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kprint("H");
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break;
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case 0x24:
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kprint("J");
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break;
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case 0x25:
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kprint("K");
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break;
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case 0x26:
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kprint("L");
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break;
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case 0x27:
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kprint(";");
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break;
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case 0x28:
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kprint("'");
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break;
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case 0x29:
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kprint("`");
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break;
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case 0x2A:
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kprint("LShift");
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break;
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case 0x2B:
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kprint("\\");
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break;
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case 0x2C:
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kprint("Z");
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break;
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case 0x2D:
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kprint("X");
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break;
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case 0x2E:
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kprint("C");
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break;
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case 0x2F:
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kprint("V");
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break;
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case 0x30:
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kprint("B");
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break;
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case 0x31:
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kprint("N");
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break;
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case 0x32:
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kprint("M");
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break;
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case 0x33:
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kprint(",");
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break;
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case 0x34:
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kprint(".");
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break;
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case 0x35:
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kprint("/");
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break;
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case 0x36:
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kprint("Rshift");
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break;
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case 0x37:
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kprint("Keypad *");
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break;
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case 0x38:
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kprint("LAlt");
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break;
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case 0x39:
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kprint("Spc");
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break;
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default:
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if (scancode <= 0x7f)
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{
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kprint("Unknown key down");
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}
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else if (scancode <= 0x39 + 0x80)
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{
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kprint("key up ");
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print_letter(scancode - 0x80);
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}
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else
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kprint("Unknown key up");
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break;
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}
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}

‎os/drivers/keyboard.h‎

Whitespace-only changes.

‎os/drivers/ports.o‎

-2.42 KB
Binary file not shown.

‎os/drivers/screen.o‎

-4.51 KB
Binary file not shown.

‎os/kernel/kernel.c‎

Lines changed: 7 additions & 7 deletions
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@@ -5,14 +5,14 @@
55
66
*/
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8-
#include "../drivers/screen.h"
9-
#include "util.h"
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#include "../cpu/isr.h"
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#include "../cpu/idt.h"
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#include "../cpu/timer.h"
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#include "../drivers/keyboard.h"
1211

13-
void main()
14-
{
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void main() {
1513
isr_install();
16-
__asm__ __volatile__("int $2");
17-
__asm__ __volatile__("int $3");
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asm volatile("sti");
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init_timer(50);
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init_keyboard();
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}

‎os/kernel/util.c‎

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Original file line numberDiff line numberDiff line change
@@ -37,4 +37,23 @@ void asciiIntConverter(int n, char str[])
3737
if (sign < 0)
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str[i++] = '-';
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str[i] = '\0';
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}
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void reverse(char s[])
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{
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int a, b, c;
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for (b = 0, c = strlen(s) - 1; b < c; b++, c--)
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{
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a = s[b];
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s[b] = s[c];
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s[c] = a;
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}
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}
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int strlen(char s[])
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{
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int i = 0;
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while (s[i] != '\0')
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++i;
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return i;
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}

‎os/kernel/util.h‎

Lines changed: 3 additions & 0 deletions
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@@ -14,4 +14,7 @@ void memory_copy(char *source, char *dest, int nbytes);
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void memory_set(u8 *dest, u8 value, u32 length);
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void asciiIntConverter(int n, char str[]);
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void reverse(char s[]);
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int strlen(char s[]);
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#endif

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