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Add logic to serialize and marshal out-of-band keyboard commands

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5460 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2012-12-25 17:22:58 +00:00
parent 671044fd30
commit 4cc97f2930
6 changed files with 636 additions and 3 deletions
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ChangeLog
+3 -1
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@@ -3818,4 +3818,6 @@
* arch/arm/src/up_head.S: Fix backward conditional compilation. NOTE * arch/arm/src/up_head.S: Fix backward conditional compilation. NOTE
there is a issue of ARM9 systems with low vectors and large memories there is a issue of ARM9 systems with low vectors and large memories
that will have to be addressed in the future. that will have to be addressed in the future.
* libc/misc/lib_kbdencode.c and lib_kbddecode.c: Add logic to marshal
and serialized "out-of-band" keyboard commands intermixed with normal
ASCII data (not yet hooked into anything).
include/nuttx/input/kbd_codec.h
+292
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@@ -0,0 +1,292 @@
/************************************************************************************
* include/nuttx/input/kbd_codec.h
* Serialize and marshaling out-of-band keyboard data
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __INCLUDE_NUTTX_INPUT_KBD_CODEC_H
#define __INCLUDE_NUTTX_INPUT_KBD_CODEC_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/streams.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/* These are the special, "out-of-band" keyboard commands recognized by the
* CODEC.
*/
enum kbd_keycode_e
{
KEYCODE_NORMAL = 0, /* Not a special keycode */
/* Delete and Backspace keycodes (in case they may be different than the
* ASCII BKSP and DEL values.
*/
KEYCODE_FWDDEL, /* DELete (forward delete) */
KEYCODE_BACKDEL, /* Backspace (backward delete) */
/* Cursor movement */
KEYCODE_HOME, /* Home */
KEYCODE_END, /* End */
KEYCODE_LEFT, /* Left arrow */
KEYCODE_RIGHT, /* Right arrow */
KEYCODE_UP, /* Up arrow */
KEYCODE_DOWN, /* Down arrow */
KEYCODE_PAGEUP, /* Page up */
KEYCODE_PAGEDOWN, /* Page down */
/* Edit commands */
KEYCODE_INSERT, /* Insert */
KEYCODE_AGAIN, /* Again */
KEYCODE_UNDO, /* Undo */
KEYCODE_REDO, /* Redo */
KEYCODE_CUT, /* Cut */
KEYCODE_COPY, /* Copy */
KEYCODE_PASTE, /* Paste */
KEYCODE_FIND , /* Find */
/* Selection codes */
KEYCODE_ENTER, /* Enter */
KEYCODE_SELECT, /* Select */
KEYCODE_EXECUTE, /* Execute */
/* Keyboard modes */
KEYCODE_CAPSLOCK, /* Caps Lock */
KEYCODE_SCROLLLOCK, /* Scroll Lock */
KEYCODE_NUMLOCK, /* Keypad Num Lock and Clear */
KEYCODE_LCAPSLOCK, /* Locking Caps Lock */
KEYCODE_LNUMLOCK, /* Locking Num Lock */
KEYCODE_LSCROLLLOCK, /* Locking Scroll Lock */
/* Misc control codes */
KEYCODE_POWER, /* Power */
KEYCODE_HELP, /* Help */
KEYCODE_MENU, /* Menu */
KEYCODE_STOP, /* Stop */
KEYCODE_PAUSE, /* Pause */
KEYCODE_BREAK, /* Break */
KEYCODE_CANCEL, /* Cancel */
KEYCODE_PRINTSCN, /* PrintScreen */
KEYCODE_SYSREQ, /* SysReq/Attention */
/* Audio */
KEYCODE_MUTE, /* Mute */
KEYCODE_VOLUP, /* Volume Up */
KEYCODE_VOLDOWN, /* Volume Down */
/* Telephone */
KEYCODE_ANSWER, /* Answer (phone) */
KEYCODE_HANGUP, /* Hang-up (phone) */
/* Calculator */
KEYCODE_CLEAR, /* Clear */
KEYCODE_CLEARENTRY, /* Clear entry */
KEYCODE_MEMSET, /* Memory set */
KEYCODE_MEMCLEAR, /* Memory clear */
KEYCODE_MEMRECALL, /* Memory recall */
KEYCODE_MEMADD, /* Memory add */
KEYCODE_MEMSUBTRACT, /* Memory substract */
KEYCODE_MEMMULTIPY, /* Memory multiply */
KEYCODE_MEMDIVIDE, /* Memory divide */
KEYCODE_BINARY, /* Binary mode */
KEYCODE_OCTAL, /* Octal mode */
KEYCODE_DECIMAL, /* Decimal mode */
KEYCODE_HEXADECIMAL, /* Hexadecimal mode */
/* Languages */
KEYCODE_LANG1, /* LANG1 */
KEYCODE_LANG2, /* LANG2 */
KEYCODE_LANG3, /* LANG3 */
KEYCODE_LANG4, /* LANG4 */
KEYCODE_LANG5, /* LANG5 */
KEYCODE_LANG6, /* LANG6 */
KEYCODE_LANG7, /* LANG7 */
KEYCODE_LANG8, /* LANG8 */
/* Context-specific function keys */
KEYCODE_F1, /* Function key 1 */
KEYCODE_F2, /* Function key 2 */
KEYCODE_F3, /* Function key 3 */
KEYCODE_F4, /* Function key 4 */
KEYCODE_F5, /* Function key 5 */
KEYCODE_F6, /* Function key 6 */
KEYCODE_F7, /* Function key 7 */
KEYCODE_F8, /* Function key 8 */
KEYCODE_F9, /* Function key 9 */
KEYCODE_F10, /* Function key 10 */
KEYCODE_F11, /* Function key 11 */
KEYCODE_F12, /* Function key 12 */
KEYCODE_F13, /* Function key 13 */
KEYCODE_F14, /* Function key 14 */
KEYCODE_F15, /* Function key 15 */
KEYCODE_F16, /* Function key 16 */
KEYCODE_F17, /* Function key 17 */
KEYCODE_F18, /* Function key 18 */
KEYCODE_F19, /* Function key 19 */
KEYCODE_F20, /* Function key 20 */
KEYCODE_F21, /* Function key 21 */
KEYCODE_F22, /* Function key 22 */
KEYCODE_F23, /* Function key 23 */
KEYCODE_F24 /* Function key 24 */
};
#define FIRST_KEYCODE KEYCODE_FWDDEL
#define LAST_KEYCODE KEYCODE_F24
/* kbd_get return values */
#define KBD_NORMAL 0
#define KBD_SPECIAL 1
#define KBD_ERROR EOF
/****************************************************************************
* Public Types
****************************************************************************/
struct kget_getstate_s
{
uint8_t nch; /* Number of characters in the buffer */
uint8_t ndx; /* Index to next character in the buffer */
uint8_t buf[4]; /* Buffer of ungotten data */
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
extern "C"
{
#endif
/****************************************************************************
* The following functions are intended for use by "producer", keyboard
* or keypad drivers to encode information into driver buffers.
****************************************************************************/
/****************************************************************************
* Name: kbd_puttext
*
* Description:
* Put one byte of normal, "in-band" ASCII data into the output stream.
*
* Input Parameters:
* ch - The character to be into the output stream.
* stream - An instance of lib_outstream_s to do the low-level put
* operation.
*
* Returned Value:
* None
*
****************************************************************************/
#define kbd_puttext(ch, stream) (stream)->put((stream), (int)(ch))
/****************************************************************************
* Name: kbd_putspecial
*
* Description:
* Put one special, "out-of-band" command into the output stream.
*
* Input Parameters:
*
* Returned Value:
* None
*
****************************************************************************/
void kbd_putspecial(enum kbd_keycode_e keycode,
FAR struct lib_outstream_s *stream);
/****************************************************************************
* The following functions are intended for use by "consumer" applications
* to remove and decode information from the driver provided buffer.
****************************************************************************/
/****************************************************************************
* Name: kbd_get
*
* Description:
* Put one byte of data or special command from the driver provided input
* buffer.
*
* Input Parameters:
* stream - An instance of lib_instream_s to do the low-level get
* operation.
* pch - The location character to save the returned value. This may be
* either a normal, "in-band" ASCII characer or a special, "out-of-band"
* command.
* state - A user provided buffer to support parsing. This structure
* should be cleared the first time that kbd_get is called.
*
* Returned Value:
* 1 - Indicates the successful receipt of a special, "out-of-band" command
* 0 - Indicates the successful receipt of normal, "in-band" ASCII data.
* EOF - An error has getting the next character (reported by the stream).
* Normally indicates the end of file.
*
****************************************************************************/
int kbd_get(FAR struct lib_instream_s *stream,
FAR struct kget_getstate_s *state, FAR uint8_t *pch);
#ifdef __cplusplus
}
#endif
#endif /* __INCLUDE_NUTTX_INPUT_KBD_CODEC_H */
libc/misc/Make.defs
+1 -1
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@@ -35,7 +35,7 @@
# Add the internal C files to the build # Add the internal C files to the build
CSRCS += lib_init.c lib_filesem.c CSRCS += lib_init.c lib_filesem.c lib_kbdencode.c lib_kbddecode.c
# Add C files that depend on file OR socket descriptors # Add C files that depend on file OR socket descriptors
libc/misc/lib_kbddecode.c
+258
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@@ -0,0 +1,258 @@
/********************************************************************************************
* libc/msic/lib_kbddecode.c
* Decoding side of the Keyboard CODEC
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Authors: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
********************************************************************************************/
/********************************************************************************************
* Included Files
********************************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <assert.h>
#include <nuttx/streams.h>
#include <nuttx/ascii.h>
#include <nuttx/input/kbd_codec.h>
/********************************************************************************************
* Pre-Processor Definitions
********************************************************************************************/
#define NDX_ESC 0
#define NDX_BRACKET 1
#define NDX_CODE 2
#define NCX_SEMICOLON 3
#define NCH_ESC 1
#define NCH_BRACKET 2
#define NCH_CODE 3
#define NCH_SEMICOLON 4
/********************************************************************************************
* Private Functions
********************************************************************************************/
/****************************************************************************
* Name: kbd_reget
*
* Description:
* We have unused characters from the last, unsuccessful. Return one of
* these instead of the .
*
* Input Parameters:
* stream - An instance of lib_instream_s to do the low-level get
* operation.
* pch - The location character to save the returned value. This may be
* either a normal, "in-band" ASCII characer or a special, "out-of-band"
* command.
* state - A user provided buffer to support parsing. This structure
* should be cleared the first time that kbd_get is called.
*
* Returned Value:
* 2 - Indicates the successful receipt of a special, "out-of-band" command
* 1 - Indicates the successful receipt of normal, "in-band" ASCII data.
* 0 - Indicates end-of-file or that the stream has been closed
* EOF - An error has getting the next character (reported by the stream).
*
****************************************************************************/
static int kbd_reget(FAR struct kget_getstate_s *state, FAR uint8_t *pch)
{
/* Return the next character */
*pch = state->buf[state->ndx];
state->ndx++;
state->nch--;
return KBD_NORMAL;
}
/********************************************************************************************
* Public Functions
********************************************************************************************/
/****************************************************************************
* Name: kbd_get
*
* Description:
* Put one byte of data or special command from the driver provided input
* buffer.
*
* Input Parameters:
* stream - An instance of lib_instream_s to do the low-level get
* operation.
* pch - The location character to save the returned value. This may be
* either a normal, "in-band" ASCII characer or a special, "out-of-band"
* command.
* state - A user provided buffer to support parsing. This structure
* should be cleared the first time that kbd_get is called.
*
* Returned Value:
* 1 - Indicates the successful receipt of a special, "out-of-band" command
* 0 - Indicates the successful receipt of normal, "in-band" ASCII data.
* EOF - An error has getting the next character (reported by the stream).
* Normally indicates the end of file.
*
****************************************************************************/
int kbd_get(FAR struct lib_instream_s *stream,
FAR struct kget_getstate_s *state, FAR uint8_t *pch)
{
int ch;
DEBUGASSERT(stream && state && pch);
/* Are their ungotten characters from the last, failed parse? */
if (state->nch > 0)
{
/* Yes, return the next ungotten character */
return kbd_reget(state, pch);
}
state->ndx = 0;
/* No, ungotten characters. Check for the beginning of an esc sequence. */
ch = stream->get(stream);
if (ch == EOF)
{
/* End of file/stream */
return KBD_ERROR;
}
else
{
state->buf[NDX_ESC] = (uint8_t)ch;
state->nch = NCH_ESC;
if (ch != ASCII_ESC)
{
/* Not the beginning of an escape sequence. Return the character. */
return kbd_reget(state, pch);
}
}
/* Check for ESC-[ */
ch = stream->get(stream);
if (ch == EOF)
{
/* End of file/stream. Return the escape character now. We will
* return the EOF indication next time.
*/
return kbd_reget(state, pch);
}
else
{
state->buf[NDX_BRACKET] = ch;
state->nch = NCH_BRACKET;
if (ch != '[')
{
/* Not the beginning of an escape sequence. Return the ESC now,
* return the following character later.
*/
return kbd_reget(state, pch);
}
}
/* Get and verify the special, "out-of-band" command code */
ch = stream->get(stream);
if (ch == EOF)
{
/* End of file/stream. Unget everything and return the ESC character.
*/
return kbd_reget(state, pch);
}
else
{
state->buf[NDX_CODE] = (uint8_t)ch;
state->nch = NCH_CODE;
/* Check for a valid special command code */
if (ch < FIRST_KEYCODE || ch > LAST_KEYCODE)
{
/* Not a special command code, return the ESC now and the next two
* characters later.
*/
return kbd_reget(state, pch);
}
}
/* Check for the final semicolon */
ch = stream->get(stream);
if (ch == EOF)
{
/* End of file/stream. Unget everything and return the ESC character.
*/
return kbd_reget(state, pch);
}
else
{
state->buf[NCX_SEMICOLON] = (uint8_t)ch;
state->nch = NCH_SEMICOLON;
/* Check for a valid special command code */
if (ch != ';')
{
/* Not a special command code, return the ESC now and the next two
* characters later.
*/
return kbd_reget(state, pch);
}
}
/* We have successfully parsed the the entire escape sequence. Return the
* special code in pch and the value 2.
*/
*pch = state->buf[NDX_CODE];
state->nch = 0;
return KBD_SPECIAL;
}
libc/misc/lib_kbdencode.c
+81
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@@ -0,0 +1,81 @@
/********************************************************************************************
* libc/msic/lib_kbdencode.c
* Encoding side of the Keyboard CODEC
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Authors: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
********************************************************************************************/
/********************************************************************************************
* Included Files
********************************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <assert.h>
#include <nuttx/streams.h>
#include <nuttx/ascii.h>
#include <nuttx/input/kbd_codec.h>
/********************************************************************************************
* Pre-Processor Definitions
********************************************************************************************/
/********************************************************************************************
* Public Functions
********************************************************************************************/
/****************************************************************************
* Name: kbd_putspecial
*
* Description:
* Put one special, "out-of-band" command into the output stream.
*
* Input Parameters:
*
* Returned Value:
* None
*
****************************************************************************/
void kbd_putspecial(enum kbd_keycode_e keycode,
FAR struct lib_outstream_s *stream)
{
DEBUGASSERT(stream && keycode >= KEYCODE_FWDDEL && keycode <= LAST_KEYCODE);
stream->put(stream, ASCII_ESC);
stream->put(stream, '[');
stream->put(stream, (int)keycode);
stream->put(stream, ';');
}