utilities.h File Reference

most importantly low level function used in kernel More...

#include <stdint.h>
#include "ctype.h"

Go to the source code of this file.

Functions
void	clear_screen ()
void	hello_hybrid_programming ()
	testcase More...
int	add (int, int)
int	kbhit ()
int	readkb ()
static void	set_cursor (uint8_t row, uint8_t col)
static uint16_t	get_cursor ()
static void	__screen_scroll (uint16_t row_col_lu, uint16_t row_col_rd, uint8_t lines, uint16_t direction)
static void	scroll_up_one_line ()

Detailed Description

most importantly low level function used in kernel

Definition in file utilities.h.

Function Documentation

__screen_scroll()

static void __screen_scroll ( uint16_t  row_col_lu, uint16_t  row_col_rd, uint8_t  lines, uint16_t  direction  )

inlinestatic

no need to use. screen the scrool.

Parameters

row_col_lu	16bits. high: row, low: col. left upper point.
row_col_rd	high 16bits row, low: col. right down point.
lines	how many lines to scrool
direction	0 if scroll up. any int otherwise.

Definition at line 68 of file utilities.h.

add()

int add	(	int	,
		int
	)

testcase

clear_screen()

void clear_screen

(

)

get_cursor()

static uint16_t get_cursor ( )

inlinestatic

get the current cursor

Returns

a 16 bits int. the high 8 bits store the row. the low 8 bits store the column.

Definition at line 45 of file utilities.h.

hello_hybrid_programming()

void hello_hybrid_programming

(

)

testcase

kbhit()

int kbhit

(

)

unbocked function to test whether kb is hit. WARNING: this function will not remove kbhit in buffer. you need to call readkb to do so.

Returns

return zero if no kb is hit. return ascii otherwise.

readkb()

int readkb

(

)

scroll_up_one_line()

static void scroll_up_one_line ( )

inlinestatic

Definition at line 91 of file utilities.h.

set_cursor()

static void set_cursor ( uint8_t  row, uint8_t  col  )

inlinestatic

directly set cursor

Parameters

row	range 0~24
col	range 0~79

Definition at line 26 of file utilities.h.