/**************************************************************************** * libs/libc/misc/lib_kbdencode.c * Encoding side of the Keyboard CODEC * * Copyright (C) 2012 Gregory Nutt. All rights reserved. * Authors: Gregory Nutt * * 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 #include #include #include #include #include /**************************************************************************** * 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)); }