Implemented modules for keyboard interrupt, his driver and the keyboard...

Implemented modules for keyboard interrupt, his driver and the keyboard buffer. Also a init_drivers functions was created to initialize all drivers (in this case, the keyboard drivers initialize the keyboard buffer

driver.c

+#include "driver.h"
+#include "keyboard.h"
+#include "screen.h"
+
+void init_drivers()
+{
+    print_screen("Loading keyboard driver ...");
+    init_keyboard();
+    print_screen("DONE.\n");
+}

driver.h

+#ifndef _DRIVER_H
+#define _DRIVER_H
+
+/* Just a simple function to initialize all drivers */
+void init_drivers();
+
+#endif
\ No newline at end of file

interrupt.c

@@ -3,6 +3,7 @@
 #include "status.h"
 #include "screen.h"
 #include "pic.h"
+#include "keyboard.h"
 
 /* Exception handler. It will evaluate the value by the interrupt_number
 in interrupt_frame */
@@ -72,11 +73,7 @@ void interrupt_handler(interrupt_frame *frame)
             print_screen("PIT interrupt called\n");
             break;
         case N_KEYBOARD:
-            // TODO: esto es alpha para sacar los datos del buff del teclado
-            inb_port(0x64);
-            char c = inb_port(0x60);
-            if (c > 0 && c <= 0x58)
-                print_screen("Keyboard interrupt called\n");
+            keyboard_handler();
             break;
         case N_FLOPPY:
             print_screen("Floppy disk interrupt called\n");

keyboard.c

+#include "keyboard.h"
+#include "x86.h"
+#include "mutex.h"
+#include "pic.h"
+
+/* Buffer to save key pressed. Will be implemeted as a queue.
+Queues implemented with arrays use an empty field */
+uint8_t keyboard_buffer[KEYBOARD_BUFFER_SIZE + 1];
+uint8_t keyboard_buffer_head, keyboard_buffer_tail;
+
+void init_keyboard()
+{
+    keyboard_buffer_tail = 0;
+    keyboard_buffer_head = -1;
+}
+
+void keyboard_handler()
+{
+    uint32_t status;
+    wait(&keyboard_buffer_mutex);
+
+    /* Get status of keyboard */
+    status = inb_port(KEYBOARD_COMMAND_PORT);
+
+    if (status & 0x01) {
+        /* Get the character */
+        char keycode = inb_port(KEYBOARD_DATA_PORT);
+
+        /* Proccess basic keys (ASCII) */
+        if (keycode > 0 && keycode < 128) {
+            print_screen("Keyboard interrupt called.\n");
+        }
+    }
+    signal(&keyboard_buffer_mutex);
+}
\ No newline at end of file

keyboard.h

+#ifndef _KEYBOARD_H
+#define _KEYBOARD_H
+
+/* Function to manage the keyboard when the keyboard interrupt is called.
+Its the driver. */
+void keyboard_handler();
+
+/* The size of the keyboard buffer (buffer to save the key pressed) */
+#define KEYBOARD_BUFFER_SIZE 100
+
+
+#endif
\ No newline at end of file

pic.c

@@ -2,13 +2,13 @@
 #include "x86.h"
 #include <stdint.h>
 
-void init_keyboard()
+void init_irq_keyboard()
 {
-    /* Init the keyboard doesnt need any special */
+    /* Init the keyboard doesnt need any special (from PIC), */
     return;
 }
 
-void init_pit()
+void init_irq_pit()
 {
     /* the PIT frecuency is setted by a divisor. We will set the PIT frequency
     to 100 tics per seconds (100Hz) */
@@ -45,7 +45,7 @@ void init_pic()
     outb_port(DATA_SLAVE_PIC, DISABLE_ALL);
 
     /* Now, will init each device drivers one by one */
-    init_keyboard();
+    init_irq_keyboard();
     /* Enable IRQs */
     outb_port(DATA_MASTER_PIC, DISABLE_ALL & KEYBOARD);
 }