From 11ced165e0df11cc3c889eb0cc402467361c421b Mon Sep 17 00:00:00 2001
From: Aleksa Vuckovic <aleksav013@gmail.com>
Date: Thu, 1 Sep 2022 23:45:47 +0200
Subject: timer & stdbuff

---
 kernel/src/devices/keyboard.c | 41 ++++++++++++++++++++++++++++++-----------
 kernel/src/devices/timer.c    | 27 +++++++++++++++++++++++++++
 2 files changed, 57 insertions(+), 11 deletions(-)
 create mode 100644 kernel/src/devices/timer.c

(limited to 'kernel/src/devices')

diff --git a/kernel/src/devices/keyboard.c b/kernel/src/devices/keyboard.c
index f39f978..60f41b8 100644
--- a/kernel/src/devices/keyboard.c
+++ b/kernel/src/devices/keyboard.c
@@ -1,42 +1,61 @@
 #include <types.h>
 #include <keyboard.h>
-
 #include <pic.h>
 #include <io.h>
 #include <keymap.h>
 #include <libk/stdio.h>
 #include <libk/math.h>
-
-#define KEYBOARD_DATA_PORT	0x60
-#define KEYBOARD_STATUS_PORT	0x64
+#include <libk/string.h>
 
 bool is_pressed[128];
 
-void keyboard_handler(void)
+#include <stdbuff.h>
+#include <heap.h>
+#define BUFFER_SIZE 10000
+stdbuff* keyboard_buffer;
+
+void keyboard_handler()
 {
+	if (keyboard_buffer == NULL) {
+		keyboard_buffer = init_buff(BUFFER_SIZE);
+		memset(keyboard_buffer->data, ' ', BUFFER_SIZE);
+	}
+
 	uint8_t status = inb(KEYBOARD_STATUS_PORT);
 	if (!(status & 0x1)) {
 		return;
 	}
+
 	uint8_t keycode = inb(KEYBOARD_DATA_PORT);
+
 	if (keycode < keymap_len) {
 		is_pressed[keycode] = true;
 		if (keycode == KEY_SPACE) {
-			printf(" ");
-
+			write_buff(keyboard_buffer, " ", 1);
 		} else if (keycode == KEY_BACKSPACE) {
 			if (curr_x != 0)
-				printf("\b \b");
+				write_buff(keyboard_buffer, "\b \b", 3);
 		} else if (keycode == KEY_ENTER) {
-			printf("%c", keymap[keycode]);
+			char* output = kalloc(sizeof(char) + 1);
+			output[0] = keymap[keycode];
+			write_buff(keyboard_buffer, output, 1);
+			kfree(output);
 		} else {
+			char* output = kalloc(sizeof(char) + 1);
 			if (keymap[keycode] == ' ') return;
 			if (is_pressed[KEY_LSHIFT] || is_pressed[KEY_RSHIFT])
-				printf("%c", shift_keymap[keycode]);
+				output[0] = shift_keymap[keycode];
 			else
-				printf("%c", keymap[keycode]);
+				output[0] = keymap[keycode];
+			write_buff(keyboard_buffer, output, 1);
+			kfree(output);
 		}
 	} else {
 		is_pressed[keycode - 128] = false;
 	}
+
+	uint32_t len = (uint32_t)(keyboard_buffer->head - keyboard_buffer->tail);
+	char* print_buff = kalloc(len + 1);
+	read_buff(keyboard_buffer, print_buff, len);
+	printf("%s", print_buff);
 }
diff --git a/kernel/src/devices/timer.c b/kernel/src/devices/timer.c
new file mode 100644
index 0000000..1291219
--- /dev/null
+++ b/kernel/src/devices/timer.c
@@ -0,0 +1,27 @@
+#include <timer.h>
+#include <libk/stdio.h>
+#include <io.h>
+
+uint32_t tick = 0;
+uint32_t seconds = 0;
+
+void timer_handler()
+{
+	tick++;
+	if (tick > TICKS_PER_SECOND) {
+		tick = 0;
+		seconds++;
+	}
+}
+
+void init_timer(uint32_t frequency)
+{
+	uint32_t divisor = 1193180 / frequency;
+	outb(0x43, 0x36);
+
+	uint8_t l = (uint8_t)(divisor & 0xFF);
+	uint8_t h = (uint8_t)((divisor>>8) & 0xFF);
+
+	outb(0x40, l);
+	outb(0x40, h);
+}
-- 
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