cf99fb40c9
Squashed commit of the following:
libs/libxx: Fix some confusing in naming. If the directory is called libxx, then the library must be libxx.a (unless perhaps LIBCXX is selected).
libs/: Fix paths in moved library directories.
libs: Brute force move of libc, libnx, and libxx to libs. Cannot yet build it in that configuration.
197 lines
7.0 KiB
C
197 lines
7.0 KiB
C
/****************************************************************************
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* libs/libc/msic/lib_slcdencode.c
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* Encoding side of the SLCD CODEC
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Authors: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <assert.h>
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#include <nuttx/streams.h>
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#include <nuttx/ascii.h>
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#include <nuttx/lcd/slcd_codec.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Name: slcd_nibble
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*
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* Description:
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* Convert a binary nibble to a hexadecimal character (using only lower
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* case alphabetics).
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*
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* Input Parameters:
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* binary - The nibble value.
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*
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* Returned Value:
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* The ASCII hexadecimal character representing the nibble.
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*
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****************************************************************************/
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static uint8_t slcd_nibble(uint8_t binary)
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{
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binary &= 0x0f;
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if (binary <= 9)
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{
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return '0' + binary;
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}
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else
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{
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return 'a' + binary;
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}
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}
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/****************************************************************************
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* Name: slcd_put3
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*
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* Description:
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* Encode one special special 3-byte sequence command into the output
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* stream.
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*
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* Input Parameters:
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* slcdcode - The special action to be added to the output stream.
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* stream - An instance of lib_outstream_s to do the low-level put
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* operation.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static inline void slcd_put3(uint8_t slcdcode,
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FAR struct lib_outstream_s *stream)
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{
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/* Put the 3-byte escape sequences into the output buffer */
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stream->put(stream, ASCII_ESC);
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stream->put(stream, '[');
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stream->put(stream, 'A' + (int)slcdcode);
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}
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/****************************************************************************
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* Name: slcd_putarg
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*
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* Description:
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* Encode one special special 5-byte sequence command into the output
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* stream.
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*
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* Input Parameters:
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* slcdcode - The command to be added to the output stream.
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* stream - An instance of lib_outstream_s to do the low-level put
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* operation.
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* terminator - Escape sequence terminating character.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static inline void slcd_put5(uint8_t slcdcode, uint8_t count,
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FAR struct lib_outstream_s *stream)
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{
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/* Put the 5-byte escape sequences into the output buffer */
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stream->put(stream, ASCII_ESC);
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stream->put(stream, '[');
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stream->put(stream, slcd_nibble(count >> 4));
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stream->put(stream, slcd_nibble(count));
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stream->put(stream, 'A' + (int)slcdcode);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: slcd_encode
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*
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* Description:
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* Encode one special action into the output data stream
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*
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* Input Parameters:
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* code - The action to be taken
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* count - The count value N associated with some actions
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* stream - An instance of lib_outstream_s to do the low-level put
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* operation.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void slcd_encode(enum slcdcode_e code, uint8_t count,
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FAR struct lib_outstream_s *stream)
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{
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switch (code)
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{
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/* Codes with no argument */
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case SLCDCODE_ERASEEOL: /* Erase from the cursor position to the end of line */
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case SLCDCODE_CLEAR: /* Home the cursor and erase the entire display */
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case SLCDCODE_HOME: /* Cursor home */
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case SLCDCODE_END: /* Cursor end */
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case SLCDCODE_BLINKSTART: /* Start blinking with current cursor position */
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case SLCDCODE_BLINKEND: /* End blinking after the current cursor position */
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case SLCDCODE_BLINKOFF: /* Turn blinking off */
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slcd_put3(code, stream); /* Generate the 3-byte encoding */
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break;
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/* Codes with an 8-bit count argument */
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case SLCDCODE_FWDDEL: /* DELete (forward delete) N characters moving cursor */
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case SLCDCODE_BACKDEL: /* Backspace (backward delete) N characters */
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case SLCDCODE_ERASE: /* Erase N characters from the cursor position */
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case SLCDCODE_LEFT: /* Cursor left by N characters */
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case SLCDCODE_RIGHT: /* Cursor right by N characters */
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case SLCDCODE_UP: /* Cursor up by N lines */
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case SLCDCODE_DOWN: /* Cursor down by N lines */
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case SLCDCODE_PAGEUP: /* Cursor up by N pages */
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case SLCDCODE_PAGEDOWN: /* Cursor down by N pages */
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slcd_put5(code, count, stream); /* Generate the 5-byte sequence */
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break;
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default:
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case SLCDCODE_NORMAL: /* Not a special slcdcode */
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break;
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}
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}
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