#include "precomp.h"

Include dependency graph for keyboard.c:

Macros
#define	E0_KPENTER 96

#define	E0_RCTRL 97

#define	E0_KPSLASH 98

#define	E0_PRSCR 99

#define	E0_RALT 100

#define	E0_BREAK 101

#define	E0_HOME 102

#define	E0_UP 103

#define	E0_PGUP 104

#define	E0_LEFT 105

#define	E0_RIGHT 106

#define	E0_END 107

#define	E0_DOWN 108

#define	E0_PGDN 109

#define	E0_INS 110

#define	E0_DEL 111

#define	E1_PAUSE 119

#define	E0_MACRO 112

#define	E0_F13 113

#define	E0_F14 114

#define	E0_HELP 115

#define	E0_DO 116

#define	E0_F17 117

#define	E0_KPMINPLUS 118

#define	E0_OK 124

#define	E0_MSLW 125

#define	E0_MSRW 126

#define	E0_MSTM 127

Functions
UCHAR NTAPI	LlbKbdTranslateScanCode (IN USHORT ScanCode, IN PUCHAR KeyCode)

CHAR NTAPI	LlbKeyboardGetChar (VOID)

Variables
CHAR	LlbHwScanCodeToAsciiTable [58][2]

UCHAR	LlbHwExtendedScanCodeTable [128]

USHORT	LlbKbdLastScanCode

Macro Definition Documentation

◆ E0_BREAK

#define E0_BREAK 101

Definition at line 16 of file keyboard.c.

◆ E0_DEL

#define E0_DEL 111

Definition at line 26 of file keyboard.c.

◆ E0_DO

#define E0_DO 116

Definition at line 32 of file keyboard.c.

◆ E0_DOWN

#define E0_DOWN 108

Definition at line 23 of file keyboard.c.

◆ E0_END

#define E0_END 107

Definition at line 22 of file keyboard.c.

◆ E0_F13

#define E0_F13 113

Definition at line 29 of file keyboard.c.

◆ E0_F14

#define E0_F14 114

Definition at line 30 of file keyboard.c.

◆ E0_F17

#define E0_F17 117

Definition at line 33 of file keyboard.c.

◆ E0_HELP

#define E0_HELP 115

Definition at line 31 of file keyboard.c.

◆ E0_HOME

#define E0_HOME 102

Definition at line 17 of file keyboard.c.

◆ E0_INS

#define E0_INS 110

Definition at line 25 of file keyboard.c.

◆ E0_KPENTER

#define E0_KPENTER 96

Definition at line 11 of file keyboard.c.

◆ E0_KPMINPLUS

#define E0_KPMINPLUS 118

Definition at line 34 of file keyboard.c.

◆ E0_KPSLASH

#define E0_KPSLASH 98

Definition at line 13 of file keyboard.c.

◆ E0_LEFT

#define E0_LEFT 105

Definition at line 20 of file keyboard.c.

◆ E0_MACRO

#define E0_MACRO 112

Definition at line 28 of file keyboard.c.

◆ E0_MSLW

#define E0_MSLW 125

Definition at line 36 of file keyboard.c.

◆ E0_MSRW

#define E0_MSRW 126

Definition at line 37 of file keyboard.c.

◆ E0_MSTM

#define E0_MSTM 127

Definition at line 38 of file keyboard.c.

◆ E0_OK

#define E0_OK 124

Definition at line 35 of file keyboard.c.

◆ E0_PGDN

#define E0_PGDN 109

Definition at line 24 of file keyboard.c.

◆ E0_PGUP

#define E0_PGUP 104

Definition at line 19 of file keyboard.c.

◆ E0_PRSCR

#define E0_PRSCR 99

Definition at line 14 of file keyboard.c.

◆ E0_RALT

#define E0_RALT 100

Definition at line 15 of file keyboard.c.

◆ E0_RCTRL

#define E0_RCTRL 97

Definition at line 12 of file keyboard.c.

◆ E0_RIGHT

#define E0_RIGHT 106

Definition at line 21 of file keyboard.c.

◆ E0_UP

#define E0_UP 103

Definition at line 18 of file keyboard.c.

◆ E1_PAUSE

#define E1_PAUSE 119

Definition at line 27 of file keyboard.c.

Function Documentation

◆ LlbKbdTranslateScanCode()

UCHAR NTAPI LlbKbdTranslateScanCode	(	IN USHORT	ScanCode,
		IN PUCHAR	KeyCode
	)

Definition at line 149 of file keyboard.c.

{
    ULONG LastScanCode;
 
    /* Check for extended scan codes */
    if ((ScanCode == 0xE0) || (ScanCode == 0xE1))
    {
        /* We'll get these on the next scan */
        LlbKbdLastScanCode = ScanCode;
        return 0;
    }
 
    /* Check for bogus scan codes */
    if ((ScanCode == 0x00) || (ScanCode == 0xFF))
    {
        /* Reset */
        LlbKbdLastScanCode = 0;
        return 0;
    }
 
    /* Only act on the break, not the make */
    if (ScanCode > 0x80) return 0;
 
    /* Keep only simple scan codes */
    ScanCode &= 0x7F;
 
    /* Check if this was part of an extended sequence */
    if (LlbKbdLastScanCode)
    {
        /* Save the last scan code and clear it, since we've consumed it now */
        LastScanCode = LlbKbdLastScanCode;
        LlbKbdLastScanCode = 0;
        switch (LastScanCode)
        {
            /* E0 extended codes */
            case 0xE0:
 
                /* Skip bogus codes */
                if ((ScanCode == 0x2A) || (ScanCode == 0x36)) return 0;
 
                /* Lookup the code for it */
                if (!LlbHwExtendedScanCodeTable[ScanCode]) return 0;
                *KeyCode = LlbHwExtendedScanCodeTable[ScanCode];
                break;
 
            /* E1 extended codes */
            case 0xE1:
 
                /* Only recognize one (the SYSREQ/PAUSE sequence) */
                if (ScanCode != 0x1D) return 0;
                LlbKbdLastScanCode = 0x100;
                break;
 
            /* PAUSE sequence */
            case 0x100:
 
                /* Make sure it's the one */
                if (ScanCode != 0x45) return 0;
                *KeyCode = E1_PAUSE;
                break;
            }
    }
    else
    {
        /* Otherwise, the scancode is the key code */
        LlbKbdLastScanCode = 0;
        *KeyCode = ScanCode;
    }
 
    /* Translation success */
    return 1;
 }

Referenced by LlbKeyboardGetChar().

◆ LlbKeyboardGetChar()

CHAR NTAPI LlbKeyboardGetChar ( VOID )

Definition at line 225 of file keyboard.c.

{
    UCHAR ScanCode, KeyCode;
 
    do
    {
        /* Read the scan code and convert it to a virtual key code */
        ScanCode = LlbHwKbdRead();
    } while (!LlbKbdTranslateScanCode(ScanCode, &KeyCode));
 
    /* Is this ASCII? */
    if (KeyCode > 96) return ScanCode;
 
    /* Return the ASCII character */
    return LlbHwScanCodeToAsciiTable[KeyCode][0];
}

Referenced by LlbFwGetCh().

Variable Documentation

◆ LlbHwExtendedScanCodeTable

UCHAR LlbHwExtendedScanCodeTable[128]

Definition at line 106 of file keyboard.c.

Referenced by LlbKbdTranslateScanCode().

◆ LlbHwScanCodeToAsciiTable

CHAR LlbHwScanCodeToAsciiTable[58][2]

Definition at line 42 of file keyboard.c.