82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
#ifndef DRIVERS_KEYBOARD_C
|
|
#define DRIVERS_KEYBOARD_C
|
|
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
|
|
#include "keycodes.c"
|
|
#include "../../util/fifo.c"
|
|
#include "keymaps/DUMMY_azerty.c"
|
|
|
|
#define KEY_QUEUE_EMPTY FIFO_QUEUE_EMPTY
|
|
|
|
bool keyboard_shift_state = false;
|
|
bool keyboard_caps_state = false;
|
|
|
|
fifo* key_queue = NULL;
|
|
|
|
int scancode_to_char(unsigned char scancode) {
|
|
keycode keycode = get_keycode(scancode);
|
|
|
|
if (keycode == KEYCODE_UNKNOWN) {
|
|
return -1;
|
|
} else if (keycode == KEYCODE_SHIFT_DOWN) {
|
|
keyboard_shift_state = true;
|
|
return -1;
|
|
} else if (keycode == KEYCODE_SHIFT_UP) {
|
|
keyboard_shift_state = false;
|
|
return -1;
|
|
} else if (keycode == KEYCODE_CAPS_UP) {
|
|
keyboard_caps_state = !keyboard_caps_state;
|
|
return -1;
|
|
} else if (keycode == KEYCODE_CAPS_DOWN) {
|
|
return -1;
|
|
} else if (keycode >= KEYCODE_A && keycode <= KEYCODE_Z) {
|
|
if (keyboard_shift_state ^ keyboard_caps_state) {
|
|
return (char) keycode; // Upper case
|
|
} else {
|
|
return ((char) keycode) + 32; // Lower case
|
|
}
|
|
} else {
|
|
return (char) keycode;
|
|
}
|
|
|
|
}
|
|
|
|
void handle_scancode(unsigned char scancode) {
|
|
int keycode = scancode_to_char(scancode);
|
|
if (keycode == -1) {
|
|
return;
|
|
} else {
|
|
fifo_enqueue(key_queue, (char) keycode);
|
|
}
|
|
}
|
|
|
|
__attribute__((interrupt)) void keyboard_handler(struct interrupt_frame* frame) {
|
|
unsigned char scan_code = inb(0x60);
|
|
outb(0x20, 0x20);
|
|
|
|
handle_scancode(scan_code);
|
|
}
|
|
|
|
int getchar_nonblocking() {
|
|
return fifo_dequeue(key_queue);
|
|
}
|
|
|
|
char getchar() {
|
|
int curr = KEY_QUEUE_EMPTY;
|
|
while ((curr = getchar_nonblocking()) == KEY_QUEUE_EMPTY) {}
|
|
return (char) curr;
|
|
}
|
|
|
|
void keyboard_init() {
|
|
key_queue = fifo_new();
|
|
|
|
uint8_t mask = inb(0x21);
|
|
|
|
mask = mask & ~(1 << 1);
|
|
|
|
outb(0x21 , mask);
|
|
}
|
|
|
|
#endif //DRIVERS_KEYBOARD_C
|