diff options
Diffstat (limited to 'nuttx/libc/misc')
| -rw-r--r-- | nuttx/libc/misc/Make.defs | 6 | ||||
| -rw-r--r-- | nuttx/libc/misc/lib_filesem.c | 16 | ||||
| -rw-r--r-- | nuttx/libc/misc/lib_kbddecode.c | 267 | ||||
| -rw-r--r-- | nuttx/libc/misc/lib_kbdencode.c | 151 | ||||
| -rw-r--r-- | nuttx/libc/misc/lib_streamsem.c | 2 |
5 files changed, 432 insertions, 10 deletions
diff --git a/nuttx/libc/misc/Make.defs b/nuttx/libc/misc/Make.defs index f4284ac60..0d3c87d9d 100644 --- a/nuttx/libc/misc/Make.defs +++ b/nuttx/libc/misc/Make.defs @@ -63,6 +63,12 @@ CSRCS += lib_match.c CSRCS += lib_crc32.c CSRCS += lib_dbg.c lib_dumpbuffer.c +# Keyboard driver encoder/decoder + +ifeq ($(CONFIG_LIB_KBDCODEC),y) +CSRCS += lib_kbdencode.c lib_kbddecode.c +endif + # Add the misc directory to the build DEPPATH += --dep-path misc diff --git a/nuttx/libc/misc/lib_filesem.c b/nuttx/libc/misc/lib_filesem.c index 5cc4624ec..f38ff5f23 100644 --- a/nuttx/libc/misc/lib_filesem.c +++ b/nuttx/libc/misc/lib_filesem.c @@ -67,8 +67,8 @@ void lib_sem_initialize(FAR struct file_struct *stream) { - /* Initialize the LIB semaphore to one (to support one-at- - * a-time access to private data sets. + /* Initialize the LIB semaphore to one (to support one-at-a-time access + * to private data sets. */ (void)sem_init(&stream->fs_sem, 0, 1); @@ -98,13 +98,13 @@ void lib_take_semaphore(FAR struct file_struct *stream) /* Take the semaphore (perhaps waiting) */ while (sem_wait(&stream->fs_sem) != 0) - { - /* The only case that an error should occr here is if - * the wait was awakened by a signal. - */ + { + /* The only case that an error should occr here is if the wait + * was awakened by a signal. + */ - ASSERT(get_errno() == EINTR); - } + ASSERT(get_errno() == EINTR); + } /* We have it. Claim the stak and return */ diff --git a/nuttx/libc/misc/lib_kbddecode.c b/nuttx/libc/misc/lib_kbddecode.c new file mode 100644 index 000000000..62554902c --- /dev/null +++ b/nuttx/libc/misc/lib_kbddecode.c @@ -0,0 +1,267 @@ +/**************************************************************************** + * 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 <debug.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 NDX_TERMINATOR 3 + +#define NCH_ESC 1 +#define NCH_BRACKET 2 +#define NCH_CODE 3 +#define NCH_TERMINATOR 4 + +#define TERM_MIN ('a' + KBD_RELEASE) +#define TERM_MAX ('a' + KBD_SPECREL) +#define TERM_RETURN(a) ((a) - 'a') + +/**************************************************************************** + * 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, character code or a special command from enum + * kbd_keycode_e + * + * Returned Value: + * KBD_PRESS - Indicates the successful receipt of norma keyboard data. + * + ****************************************************************************/ + +static int kbd_reget(FAR struct kbd_getstate_s *state, FAR uint8_t *pch) +{ + /* Return the next character */ + + *pch = state->buf[state->ndx]; + state->ndx++; + state->nch--; + return KBD_PRESS; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kbd_decode + * + * Description: + * Get 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 to save the returned value. This may be + * either a normal, character code or a special command from enum + * kbd_keycode_e + * state - A user provided buffer to support parsing. This structure + * should be cleared the first time that kbd_decode is called. + * + * Returned Value: + * + * KBD_PRESS - Indicates the successful receipt of normal, keyboard data. + * This corresponds to a keypress event. The returned value in pch is a + * simple byte of text or control data corresponding to the pressed key. + * KBD_RELEASE - Indicates a key release event. The returned value in pch + * is the byte of text or control data corresponding to the released key. + * KBD_SPECPRESS - Indicates the successful receipt of a special keyboard + * command. The returned value in pch is a value from enum kbd_getstate_s. + * KBD_SPECREL - Indicates a special key release event. The returned value + * in pch is a value from enum kbd_getstate_s. + * EOF - An error has getting the next character (reported by the stream). + * Normally indicates the end of file. + * + ****************************************************************************/ + +int kbd_decode(FAR struct lib_instream_s *stream, + FAR struct kbd_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 keyboard data to decode */ + + 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[NDX_TERMINATOR] = (uint8_t)ch; + state->nch = NCH_TERMINATOR; + + /* Check for a valid special command code */ + + if (ch < TERM_MIN || ch > TERM_MAX) + { + /* 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 + * keyboard value in pch and the value an indication determined by the + * terminating character. + */ + + *pch = state->buf[NDX_CODE]; + state->nch = 0; + return TERM_RETURN(state->buf[NDX_TERMINATOR]); +} + diff --git a/nuttx/libc/misc/lib_kbdencode.c b/nuttx/libc/misc/lib_kbdencode.c new file mode 100644 index 000000000..80138ca80 --- /dev/null +++ b/nuttx/libc/misc/lib_kbdencode.c @@ -0,0 +1,151 @@ +/**************************************************************************** + * 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 + ****************************************************************************/ + +/**************************************************************************** + * Name: kbd_encode + * + * Description: + * Encode one special special sequence command into the output stream. + * + * Input Parameters: + * keycode - The command to be added to the output stream. + * stream - An instance of lib_outstream_s to do the low-level put + * operation. + * terminator - Escape sequence terminating character. + * + * Returned Value: + * None + * + ****************************************************************************/ + +static void kbd_encode(uint8_t keycode, FAR struct lib_outstream_s *stream, + uint8_t terminator) +{ + stream->put(stream, ASCII_ESC); + stream->put(stream, '['); + stream->put(stream, (int)keycode); + stream->put(stream, terminator); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kbd_release + * + * Description: + * Encode the release of a normal key. + * + * Input Parameters: + * ch - The character associated with the key that was releared. + * stream - An instance of lib_outstream_s to do the low-level put + * operation. + * + * Returned Value: + * None + * + ****************************************************************************/ + +void kbd_release(uint8_t ch, FAR struct lib_outstream_s *stream) +{ + kbd_encode(ch, stream, ('a' + KBD_RELEASE)); +} + +/**************************************************************************** + * Name: kbd_specpress + * + * Description: + * Denotes a special key press event. Put one special keyboard command + * into the output stream. + * + * Input Parameters: + * keycode - The command to be added to the output stream. + * stream - An instance of lib_outstream_s to do the low-level put + * operation. + * + * Returned Value: + * None + * + ****************************************************************************/ + +void kbd_specpress(enum kbd_keycode_e keycode, + FAR struct lib_outstream_s *stream) +{ + DEBUGASSERT(stream && keycode >= KEYCODE_FWDDEL && keycode <= LAST_KEYCODE); + kbd_encode((uint8_t)keycode, stream, ('a' + KBD_SPECPRESS)); +} + +/**************************************************************************** + * Name: kbd_specrel + * + * Description: + * Denotes a special key release event. Put one special keyboard + * command into the output stream. + * + * Input Parameters: + * keycode - The command to be added to the output stream. + * stream - An instance of lib_outstream_s to do the low-level put + * operation. + * + * Returned Value: + * None + * + ****************************************************************************/ + +void kbd_specrel(enum kbd_keycode_e keycode, + FAR struct lib_outstream_s *stream) +{ + DEBUGASSERT(stream && keycode >= KEYCODE_FWDDEL && keycode <= LAST_KEYCODE); + kbd_encode((uint8_t)keycode, stream, ('a' + KBD_SPECREL)); +} diff --git a/nuttx/libc/misc/lib_streamsem.c b/nuttx/libc/misc/lib_streamsem.c index e38298bdb..3397f9907 100644 --- a/nuttx/libc/misc/lib_streamsem.c +++ b/nuttx/libc/misc/lib_streamsem.c @@ -86,5 +86,3 @@ void stream_semgive(FAR struct streamlist *list) { sem_post(&list->sl_sem); } - - |