PS/2 keyboard driver

This commit is contained in:
Arnau Camprubí 2022-06-19 19:08:16 +02:00
pare e93cf7db3c
commit 08a6ed51bb
S'han modificat 10 arxius amb 89 adicions i 6 eliminacions

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@ -0,0 +1,51 @@
#include "../util/string.h"
#include "keyboard.h"
#include "../arch/i686/isr.h"
#include "../stdio.h"
#include "../arch/i686/io.h"
#include "../stdio.h"
static char g_key_buffer[256];
static const char g_sc_ascii[128] = {
'?', '?', '1', '2', '3', '4', '5', '6',
'7', '8', '9', '0', '-', '=', '?', '?',
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
'O', 'P', '[', ']', '?', '?', 'A', 'S',
'D', 'F', 'G', 'H', 'J', 'K', 'L', ';',
'\'', '`', '?', '\\', 'z', 'x', 'c', 'v',
'B', 'N', 'M', ',', '.', '/', '?', '?',
'?', ' '
};
static void user_input(char *str){
printf("In: \"%s\"\n", str);
}
static void keyboard_callback(){
uint8_t scancode = i686_inb(0x60);
//printf("KEYBOARD (%i)!\n", scancode);
if(scancode < 128){ // If it's a "pressed" event, not "released"
if(scancode == 0x0E){ // Backspace
putc('\b');
g_key_buffer[strlen(g_key_buffer)-1] = '\0';
}
else if(scancode == 0x1C){ // Enter
putc('\n');
user_input(g_key_buffer);
g_key_buffer[0] = '\0';
}
else{
putc(g_sc_ascii[scancode]);
// strlen() works here because char[] is the same as
// char*, and both are null-terminated, so they are
// exactly the same
g_key_buffer[strlen(g_key_buffer)] = g_sc_ascii[scancode];
}
}
}
void keyboard_initialize(){
i686_isr_register_handler(IRQ(1), keyboard_callback);
}

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@ -0,0 +1,3 @@
#pragma once
void keyboard_initialize();

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@ -3,7 +3,7 @@
#include "../stdio.h" #include "../stdio.h"
static void timer_handler(registers *regs){ static void timer_handler(registers *regs){
printf("TICK\n"); //printf("TICK\n");
} }
void timer_initialize(){ void timer_initialize(){

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@ -50,9 +50,12 @@ int vga_print_char(char c, int x, int y){
offset = (y+1)*VGA_WIDTH; offset = (y+1)*VGA_WIDTH;
} }
else if(c == '\b'){ else if(c == '\b'){
if(offset != 0){
offset--;
VGA_MEMORY[offset*2] = ' '; VGA_MEMORY[offset*2] = ' ';
VGA_MEMORY[offset*2+1] = current_color; VGA_MEMORY[offset*2+1] = current_color;
} }
}
else{ else{
VGA_MEMORY[offset*2] = c; VGA_MEMORY[offset*2] = c;
VGA_MEMORY[offset*2+1] = current_color; VGA_MEMORY[offset*2+1] = current_color;
@ -115,3 +118,12 @@ void vga_print_string_at(char *str, int x, int y){
void vga_print_string(char *str){ void vga_print_string(char *str){
vga_print_string_at(str, -1, -1); vga_print_string_at(str, -1, -1);
} }
void vga_fill_screen(char c, uint8_t color){
for(int y = 0; y < VGA_HEIGHT; y++){
for(int x = 0; x < VGA_WIDTH; x++){
vga_set_char(x, y, c);
vga_set_color(x, y, color);
}
}
}

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@ -53,3 +53,4 @@ int vga_get_cursor();
int vga_print_char(char c, int x, int y); int vga_print_char(char c, int x, int y);
void vga_print_string_at(char *str, int x, int y); void vga_print_string_at(char *str, int x, int y);
void vga_print_string(char *str); void vga_print_string(char *str);
void vga_fill_screen(char c, uint8_t color);

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@ -2,13 +2,13 @@
#include "stdio.h" #include "stdio.h"
#include "hal/hal.h" #include "hal/hal.h"
#include "drivers/timer.h" #include "drivers/timer.h"
#include "drivers/keyboard.h"
void __attribute__((cdecl)) kmain(uint64_t magic, uint64_t addr){ void __attribute__((cdecl)) kmain(uint64_t magic, uint64_t addr){
hal_initialize(); hal_initialize();
timer_initialize(); timer_initialize();
keyboard_initialize();
puts("\x1b[33mWARNING\x1b[0m"); clear_screen();
printf(": amazing %s ahead!\n", "math");
printf("%i+%i=%i\n", 1, 1, 2);
for(;;); for(;;);
} }

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@ -101,3 +101,8 @@ void printf(char *fmt, ...){
else putc(*(fmt++)); else putc(*(fmt++));
} }
} }
void clear_screen(){
vga_fill_screen(' ', VGA_COLOR_BG_BLACK | VGA_COLOR_FG_WHITE);
vga_set_cursor(0);
}

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@ -3,3 +3,4 @@
void puts(char *str); void puts(char *str);
void putc(char c); void putc(char c);
void printf(char *fmt, ...); void printf(char *fmt, ...);
void clear_screen();

7
src/kernel/util/string.c Normal file
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@ -0,0 +1,7 @@
#include "string.h"
int strlen(char *s){
int len = 0;
while(*(s++)) len++;
return len;
}

3
src/kernel/util/string.h Normal file
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@ -0,0 +1,3 @@
#pragma once
int strlen(char *s);