74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
// US Keyboard layout because 'Murrica
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#include "kbd.h"
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#include "ports.h"
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#include "pit.h"
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#include "serial.h"
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#include "types.h"
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#include "stlio.h"
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// Courtesy of http://www.osdever.net/bkerndev/Docs/keyboard.htm
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unsigned char keymap[128] = {
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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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'\'', '`', 0, /* Left shift */
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'\\', 'z', 'x', 'c', 'v', 'b', 'n', /* 49 */
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'm', ',', '.', '/', 0, /* 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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// Reads one key from the keyboard
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void kbd_read_key(__attribute__((unused)) struct cpu_reg_state* cpu) {
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u8 scancode = serial_read_byte(KBD_PORT);
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if(scancode & 0x80) {
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// Key released
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kbd_key = keymap[scancode & 0x7f]; // clamp to 127 as the max val(gcc is anoying)
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kbd_state = KBD_RELEASE;
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kbd_time = pit_timer_ticks;
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}
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else {
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// Key pressed
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kbd_key = keymap[scancode & 0x7f]; // clamp to 127 as the max val(gcc is anoying)
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kbd_state = KBD_PRESS;
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kbd_time = pit_timer_ticks;
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}
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}
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void kbd_install_keyboard(void) {
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init_irq_handler(1, kbd_read_key);
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kbd_key = '\0';
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kbd_state = 0;
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kbd_time = 0;
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}
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