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Fix: backspace, shift (kb driver) + Add: doc + ascii art

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xamidev
2024-07-24 12:47:12 +02:00
parent d83299cb48
commit b352d3f4e2
9 changed files with 146 additions and 19 deletions
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69
src/kernel/kb.c
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@@ -4,6 +4,11 @@
#define KEYBOARD_BUFFER_SIZE 256
#define LEFT_SHIFT_PRESSED 0x2A
#define RIGHT_SHIFT_PRESSED 0x36
#define LEFT_SHIFT_RELEASED 0xAA
#define RIGHT_SHIFT_RELEASED 0xB6
unsigned char kbdus[128] =
{
0, 27, '1', '2', '3', '4', '5', '6', '7', '8', /* 9 */
@@ -44,9 +49,50 @@ unsigned char kbdus[128] =
0, /* All other keys are undefined */
};
unsigned char kbdus_shift[128] =
{
0, 27, '!', '@', '#', '$', '%', '^', '&', '*', /* 9 */
'(', ')', '_', '+', '\b', /* Backspace */
'\t', /* Tab */
'Q', 'W', 'E', 'R', /* 19 */
'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', /* Enter key */
0, /* 29 - Control */
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', /* 39 */
'"', '~', 0, /* Left shift */
'|', 'Z', 'X', 'C', 'V', 'B', 'N', /* 49 */
'M', '<', '>', '?', 0, /* Right shift */
'*',
0, /* Alt */
' ', /* Space bar */
0, /* Caps lock */
0, /* 59 - F1 key ... > */
0, 0, 0, 0, 0, 0, 0, 0,
0, /* < ... F10 */
0, /* 69 - Num lock*/
0, /* Scroll Lock */
0, /* Home key */
0, /* Up Arrow */
0, /* Page Up */
'-',
0, /* Left Arrow */
0,
0, /* Right Arrow */
'+',
0, /* 79 - End key*/
0, /* Down Arrow */
0, /* Page Down */
0, /* Insert Key */
0, /* Delete Key */
0, 0, 0,
0, /* F11 Key */
0, /* F12 Key */
0, /* All other keys are undefined */
};
static char keyboard_buffer[KEYBOARD_BUFFER_SIZE];
static unsigned int keyboard_buffer_start = 0;
static unsigned int keyboard_buffer_end = 0;
static int shift_pressed = 0;
void keyboard_handler()
{
@@ -56,14 +102,27 @@ void keyboard_handler()
if (scancode & 0x80)
{
if (scancode == LEFT_SHIFT_RELEASED || scancode == RIGHT_SHIFT_RELEASED) {
shift_pressed = 0;
}
}
else
{
char c = kbdus[scancode];
if (c)
{
keyboard_buffer[keyboard_buffer_end] = c;
keyboard_buffer_end = (keyboard_buffer_end+1) % KEYBOARD_BUFFER_SIZE;
if (scancode == LEFT_SHIFT_PRESSED || scancode == RIGHT_SHIFT_PRESSED) {
shift_pressed = 1;
} else {
char c;
if (shift_pressed) {
c = kbdus_shift[scancode];
} else {
c = kbdus[scancode];
}
if (c)
{
keyboard_buffer[keyboard_buffer_end] = c;
keyboard_buffer_end = (keyboard_buffer_end+1) % KEYBOARD_BUFFER_SIZE;
}
}
}
}