keyboard.c

#include "ps2.h"
#include "vga.h"
#include "keyboard.h"

static char* kbdbuffer;
char *mapping_default = "\?\?1234567890-=??qwertyuiop[]??asdfghjkl;'`?\\zxcvbnm,./??? ???????????????????????????????";
char *mapping_shifted = "\?\?!@#$%^&*()_+??QWERTYUIOP{}??ASDFGHJKL:\"~?|ZXCVBNM<>???? ???????????????????????????????";
int shifted = 0;
int i = 0;
int scanning = 0;

void keyboardScan(char* dataBuffer) {
    kbdbuffer = dataBuffer;
    scanning = 1;
    while(scanning) {asm("hlt");}
}

void keyboardHander(unsigned char inbyte) {
    if (scanning == 0) {
        return;
    }
    if (inbyte == 0) {
        return;
    }
    if (inbyte > 0x80)
    {
        if ((inbyte == 0xaa) || (inbyte == 0xb6))
        {
            shifted = 0;
        }
    }
    else
    {
        if ((inbyte == 0x2a) || (inbyte == 0x36))
        {
            shifted = 1;
        }
        else if (inbyte == 0x1c)
        {
            vgaPrint("\r\n");
            kbdbuffer[i] = 0;
            i = 0;
            scanning = 0;
            return;
        }
        else if (inbyte == 0x0e)
        {
            if (i > 0)
            {
                i--;
                vgaPrint("\b \b");
            }
        }
        else
        {
            if (shifted)
            {
                kbdbuffer[i] = mapping_shifted[inbyte];
            }
            else
            {
                kbdbuffer[i] = mapping_default[inbyte];
            }
            writeChar(kbdbuffer[i]);
            i++;
        }
    }
}

void initKeyboard() {
    init_ps2_1(keyboardHander);
}