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Keyboard
[Device Drivers]

Functions
void	keyb_wait ()
	Wait after a keyboard operation.
void	update_leds ()
	Update keyboard leds.
word	scan_key ()
	Get the hitten key keyboard code. Returns: The hitten key scan code.
void	init_keyboard ()
	Initialize the low-level keyboard driver.
int	kgetchar ()
	Wait for keypressed and return the hitten character ASCII code. Returns: The hitten character ASCII code.
int	keyb_read ()
	Return the first key in the buffer, without waiting if the buffer is empty. Returns: The hitten character ASCII code if a character has been hitten or NULL otherwise.
Variables
word	regular [128]
	US keyboard keymap :: regular keys.
word	with_shift [128]
	US keyboard keymap :: "with SHIFT" keys.
word	with_alt [128]
	US keyboard keymap :: "with ALT" keys.
word	with_control [128]
	US keyboard keymap :: "with CTRL" keys.
byte	keypad_char [] = {'7','8','9','-','4','5','6','+','1','2','3','0','.'}
	The keypad map.
byte	shift = 0
	SHIFT flag.
byte	ctrl = 0
	CTRL flag.
byte	alt = 0
	ALT flag.
queue_t *	keyb_queue = NULL
	Queue for the task that are waiting for the keyboard.

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Detailed Description

The floppy disk driver.

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Function Documentation

void init_keyboard (    )

Initialize the low-level keyboard driver. Definition at line 280 of file keyboard.c. { // Install the keyboard handler // install_irq_handler( KEYBOARD_IRQ, (void *)&keyboard_handler ); // Set typematic delay as short as possible // outportb(KEYB_PORT, KEYB_SET_TYPEMATIC); keyb_wait(); // typematic 0 means "MODE CON RATE=30 DELAY=1" // outportb(KEYB_PORT, 0); // Initialize leds // update_leds(); }

int keyb_read (    )

Return the first key in the buffer, without waiting if the buffer is empty. Returns: The hitten character ASCII code if a character has been hitten or NULL otherwise. Definition at line 341 of file keyboard.c. { console_t *cons = get_console_addr( get_curr_task()->console ); word key; dword IF = GET_IF(); // If the task's console is not the current console return // while ( get_curr_task()->console != get_curr_console() ) return(NULL); // If the keyboard buffer is empty return NULL // if (cons->keyb_buf_count==0) return(NULL); disable(); // Update keyboard buffer in mutual exclusion // (cons->keyb_buf_count)--; if ( ++(cons->keyb_buf_read) >= KEYB_BUF_DIM ) cons->keyb_buf_read = 0; key = cons->keyb_buffer[cons->keyb_buf_read]; SET_IF(IF); return(key); }

void keyb_wait (    )

Wait after a keyboard operation. Todo: Put here a timeout! Definition at line 90 of file keyboard.c. { uint32_t retries=500000L; while (((inportb(KEYB_STATUS) & KEYB_BUSY) == KEYB_BUSY) && retries!=0) { retries--; } }

int kgetchar (    )

Wait for keypressed and return the hitten character ASCII code. Returns: The hitten character ASCII code. Definition at line 298 of file keyboard.c. { task_t *ct = get_curr_task(); console_t *cons = get_console_addr( ct->console ); word key; uint32_t IF = GET_IF(); repeat: disable(); // If the task's console is not the current console auto-sleep // if ( ct->console != get_curr_console() ) { add_queue( &keyb_queue, ct ); sleep_task( ct ); enable(); idle(); goto repeat; } // If the keyboard buffer is empty enable interrupts and wait // if ( cons->keyb_buf_count==0 ) { enable(); idle(); goto repeat; } // Update keyboard buffer in mutual exclusion // (cons->keyb_buf_count)--; if ( ++(cons->keyb_buf_read) >= KEYB_BUF_DIM ) cons->keyb_buf_read = 0; key = cons->keyb_buffer[cons->keyb_buf_read]; SET_IF(IF); return( key ); }

word scan_key (    )

Get the hitten key keyboard code. Returns: The hitten key scan code. Definition at line 123 of file keyboard.c. { static int code, val; dword IF = GET_IF(); disable(); code = inportb(KEYB_PORT); // Get scan code val = inportb(KEYB_ACK); // Get keyboard acknowledge outportb(KEYB_ACK, val | 0x80); // Disable bit 7 outportb(KEYB_ACK, val); // Send that back SET_IF(IF); return code; }

void update_leds (    )

Update keyboard leds. Definition at line 101 of file keyboard.c. { int leds; console_t *curr_cons = get_console_addr( get_curr_console() ); dword IF = GET_IF(); leds = (curr_cons->scroll_lock) | (curr_cons->num_lock << 1) | (curr_cons->caps_lock << 2); disable(); keyb_wait(); outportb(KEYB_PORT, KEYB_LED_CODE); keyb_wait(); outportb(KEYB_PORT, leds); SET_IF(IF); }

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Variable Documentation

byte alt = 0 [static]

ALT flag. Definition at line 81 of file keyboard.c.

byte ctrl = 0 [static]

CTRL flag. Definition at line 79 of file keyboard.c.

queue_t* keyb_queue = NULL

Queue for the task that are waiting for the keyboard. Definition at line 84 of file keyboard.c.

byte keypad_char[] = {'7','8','9','-','4','5','6','+','1','2','3','0','.'} [static]

The keypad map. Definition at line 74 of file keyboard.c.

word regular[128] [static]

Initial value: { 0x0000,0x011B,0x0231,0x0332,0x0433,0x0534,0x0635,0x0736,0x0837,0x0938,0x0A39,0x0B30,0x0C2D,0x0D3D,0x0E08,0x0F09, 0x1071,0x1177,0x1265,0x1372,0x1474,0x1579,0x1675,0x1769,0x186F,0x1970,0x1A5B,0x1B5D,0x1C0D,0x1D00,0x1E61,0x1F73, 0x2064,0x2166,0x2267,0x2368,0x246A,0x256B,0x266C,0x273B,0x2827,0x2960,0x2A00,0x2B5C,0x2C7A,0x2D78,0x2E63,0x2F76, 0x3062,0x316E,0x326D,0x332C,0x342E,0x352F,0x3600,0x372A,0x3800,0x3920,0x3A00,0x3B00,0x3C00,0x3D00,0x3E00,0x3F00, 0x4000,0x4100,0x4200,0x4300,0x4400,0x4500,0x4600,0x4700,0x4800,0x4900,0x4A2D,0x4B00,0x4C00,0x4D00,0x4E2B,0x4F00, 0x5000,0x5100,0x5200,0x5300,0x5400,0x5500,0x5600,0x8500,0x8600,0x0000,0x0000,0x5B00,0x5C00,0x5D00 } US keyboard keymap :: regular keys. Definition at line 30 of file keyboard.c.

byte shift = 0 [static]

SHIFT flag. Definition at line 77 of file keyboard.c.

word with_alt[128] [static]

Initial value: { 0x0000,0x0100,0x7800,0x7900,0x7A00,0x7B00,0x7C00,0x7D00,0x7E00,0x7F00,0x8000,0x8100,0x8200,0x8300,0x0E00,0xA500, 0x1000,0x1100,0x1200,0x1300,0x1400,0x1500,0x1600,0x1700,0x1800,0x1900,0x1A00,0x1B00,0x1C00,0x1D00,0x1E00,0x1F00, 0x2000,0x2100,0x2200,0x2300,0x2400,0x2500,0x2600,0x2700,0x2800,0x2900,0x2A00,0x2B00,0x2C00,0x2D00,0x2E00,0x2F00, 0x3000,0x3100,0x3200,0x3300,0x3400,0x3500,0x3600,0x3700,0x3800,0x3900,0x3A00,0x6800,0x6900,0x6A00,0x6B00,0x6C00, 0x6D00,0x6E00,0x6F00,0x7000,0x7100,0x4500,0x4600,0x9700,0x9800,0x9900,0x4A00,0x9B00,0x9C00,0x9D00,0x4E00,0x9F00, 0xA000,0xA100,0xA200,0xA300,0x5400,0x5500,0x5600,0x8B00,0x8C00 } US keyboard keymap :: "with ALT" keys. Definition at line 52 of file keyboard.c.

word with_control[128] [static]

Initial value: { 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x9400, 0x1011,0x1117,0x1205,0x1312,0x1414,0x1519,0x1615,0x1709,0x180F,0x1910,0x0000,0x0000,0x1C0A,0x1D00,0x1E01,0x1F13, 0x2004,0x2106,0x2207,0x2308,0x240A,0x250B,0x260C,0x0000,0x0000,0x0000,0x2A00,0x0000,0x2C1A,0x2D18,0x2E03,0x2F16, 0x3002,0x310E,0x320D,0x0000,0x0000,0x9500,0x3600,0x9600,0x3800,0x3920,0x3A00,0x5E00,0x5F00,0x6000,0x6100,0x6200, 0x6300,0x6400,0x6500,0x6600,0x6700,0x4500,0x4600,0x7700,0x8D00,0x8400,0x8E00,0x7300,0x8F00,0x7400,0x9000,0x7500, 0x9100,0x7600,0x9200,0x9300,0x5400,0x5500,0x5600,0x8900,0x8A00 } US keyboard keymap :: "with CTRL" keys. Definition at line 63 of file keyboard.c.

word with_shift[128] [static]

Initial value: { 0x0000,0x011B,0x0221,0x0340,0x0423,0x0524,0x0625,0x075E,0x0826,0x092A,0x0A28,0x0B29,0x0C5F,0x0D2B,0x0E08,0x0F00, 0x1051,0x1157,0x1245,0x1352,0x1454,0x1559,0x1655,0x1749,0x184F,0x1950,0x1A7B,0x1B7D,0x1C0D,0x1D00,0x1E41,0x1F53, 0x2044,0x2146,0x2247,0x2348,0x244A,0x254B,0x264C,0x273A,0x2822,0x297E,0x2A00,0x2B7C,0x2C5A,0x2D58,0x2E43,0x2F56, 0x3042,0x314E,0x324D,0x333C,0x343E,0x353F,0x3600,0x372A,0x3800,0x3920,0x3A00,0x5400,0x5500,0x5600,0x5700,0x5800, 0x5900,0x5A00,0x5B00,0x5C00,0x5D00,0x4500,0x4600,0x4700,0x4800,0x4900,0x4A2D,0x4B00,0x4C00,0x4D00,0x4E2B,0x4F00, 0x5000,0x5100,0x5200,0x5300,0x5400,0x5500,0x5600,0x8700,0x8800,0x0000,0x0000,0x5B00,0x5C00,0x5D00 } US keyboard keymap :: "with SHIFT" keys. Definition at line 41 of file keyboard.c.

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