122 lines
4.0 KiB
C
122 lines
4.0 KiB
C
#include "../include/keyboard.h"
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#include "../include/vga.h"
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#include "../include/memory.h"
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#include "../include/queue.h"
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#include "../include/io.h"
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static KEY_STATUS *key_status;
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Queue *key_char_queue;
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unsigned char keyboard_map[128] =
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{
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0, 27, '1', '2', '3', '4', '5', '6', '7', '8', /* 9 */
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'9', '0', '-', '=', '\b', /* Backspace */
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'\t', /* Tab */
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'q', 'w', 'e', 'r', /* 19 */
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't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', /* Enter key */
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0, /* 29 - Control */
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'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* 39 */
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'\'', '`', -1, /* Left shift */
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'\\', 'z', 'x', 'c', 'v', 'b', 'n', /* 49 */
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'm', ',', '.', '/', -1, /* Right shift */
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'*',
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0, /* Alt */
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' ', /* Space bar */
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0, /* Caps lock */
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0, /* 59 - F1 key ... > */
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0, 0, 0, 0, 0, 0, 0, 0,
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0, /* < ... F10 */
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0, /* 69 - Num lock*/
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0, /* Scroll Lock */
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0, /* Home key */
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0, /* Up Arrow */
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0, /* Page Up */
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'-',
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0, /* Left Arrow */
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0,
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0, /* Right Arrow */
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'+',
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0, /* 79 - End key*/
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0, /* Down Arrow */
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0, /* Page Down */
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0, /* Insert Key */
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0, /* Delete Key */
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0, 0, 0,
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0, /* F11 Key */
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0, /* F12 Key */
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0, /* All other keys are undefined */
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};
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unsigned char shift_keyboard_map[128] =
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{
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0, 27, '!', '@', '#', '$', '%', '^', '&', '*', /* 9 */
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'(', ')', '_', '+', '\b', /* Backspace */
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'\t', /* Tab */
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'Q', 'W', 'E', 'R', /* 19 */
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'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', /* Enter key */
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0, /* 29 - Control */
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'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', /* 39 */
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'"', '~', -1, /* Left shift */
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'|', 'Z', 'X', 'C', 'V', 'B', 'N', /* 49 */
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'M', '<', '>', '?', -1, /* Right shift */
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'*',
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0, /* Alt */
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' ', /* Space bar */
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0, /* Caps lock */
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0, /* 59 - F1 key ... > */
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0, 0, 0, 0, 0, 0, 0, 0,
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0, /* < ... F10 */
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0, /* 69 - Num lock*/
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0, /* Scroll Lock */
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0, /* Home key */
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0, /* Up Arrow */
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0, /* Page Up */
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'-',
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0, /* Left Arrow */
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0,
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0, /* Right Arrow */
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'+',
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0, /* 79 - End key*/
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0, /* Down Arrow */
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0, /* Page Down */
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0, /* Insert Key */
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0, /* Delete Key */
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0, 0, 0,
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0, /* F11 Key */
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0, /* F12 Key */
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0, /* All other keys are undefined */
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};
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void init_keyboard(){
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key_status = (KEY_STATUS*) alloc(sizeof(KEY_STATUS));
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key_status->is_shift = 0;
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key_char_queue = create_queue();
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register_interrupt_handler(0x21,handle_keyboard_input);
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}
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int handle_keyboard_input(){
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unsigned char status = read_port(KEYBOARD_STATUS_PORT);
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uint32_t key = read_port(KEYBOARD_DATA_PORT);
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int release = key & 0xb10000000;
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char c = key_status->is_shift ? shift_keyboard_map[(unsigned char )key] : keyboard_map[(unsigned char )key];
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if(!release) {
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if(c == -1) {
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key_status->is_shift = 1;
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return 0;
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}
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if(c == 0) return 0;
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queue_push(key_char_queue,(char)c);
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} else {
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if(c == -1){
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key_status->is_shift = 0;
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}
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}
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return 0;
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}
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