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view Discovery/Inc/gfx_fonts.h @ 250:822416168585 bm-2

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Buelmann: new implementation for ceiling Since my first functional fix in the ceiling computation in commit ceecabfddb57, I noticed that the computation used a linear search, that became rather computational expensive after that commit. The simple question is: why not a binary search? So, this commit implements the binary search. But there is a long story attached to this. Comparing ceiling results from hwOS and this OSTC4 code were very different. Basically, the original OSTC4 algorithm computed the ceiling using the same GFlow to GFhigh slope, in such a way, that the ceiling was in sync with the presented deco stops, where the hwOS code presents a GFhigh based ceiling. This said, it is more logical when the OSTC4 and hwOS code give similar results. This new recursive algorithm gives very similar results for the ceiling compared to hwOS. To be complete here, the Buelmann ceiling is the depth to which you can ascend, so that the leading tissue reaches GFhigh. This also explains why the deepest deco stop is normally deeper than the ceiling (unless one dives with GF like 80/80). The code implemented here is rather straightforward recursion. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Thu, 11 Apr 2019 17:48:48 +0200
parents f2d98ad6f1be
children 1c95f811967c
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///////////////////////////////////////////////////////////////////////////////
/// -*- coding: UTF-8 -*-
///
/// \file   Discovery/Inc/gfx_fonts.h
/// \brief  Header file to control placement of font in STM32 Flash
/// \author heinrichs weikamp gmbh
/// \date   14-Aug-2014
///
/// $Id$
///////////////////////////////////////////////////////////////////////////////
/// \par Copyright (c) 2014-2018 Heinrichs Weikamp gmbh
///
///     This program is free software: you can redistribute it and/or modify
///     it under the terms of the GNU General Public License as published by
///     the Free Software Foundation, either version 3 of the License, or
///     (at your option) any later version.
///
///     This program is distributed in the hope that it will be useful,
///     but WITHOUT ANY WARRANTY; without even the implied warranty of
///     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
///     GNU General Public License for more details.
///
///     You should have received a copy of the GNU General Public License
///     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//////////////////////////////////////////////////////////////////////////////

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef GFX_FONTS_H
#define GFX_FONTS_H

#include "gfx.h"

// From image_heinrichs_weikamp.c
enum { indexHWcolorSIZE = 256 };

// Forward declarations
//
// 2018-01-01 jDG:
//  - the exact address is fixed in linker script CPU1-F429.ld,
//    so that every font can be used even when not included in the actual
//    binary (boot-loader, fonts, or firmware).
//
//  - Actual font data is defined by the OSTC4/FontPack project, that shall
//    be loaded before the firmware is executed.
//
//  - Font directory starts at address 0x081E0000. Each header is 12 bytes.
//    A 0xFFFFFFFF (32 bits) marks the directory's end.
//    It is stored between __font_directory and __font_directory_end;
//
//  - Font data (chars) is stored after 0x08132040 (end of font's SFirmareData).
//    So there is space for 0x081E0000 - 0x08132040 = ADFC0 = 694 KB of fonts.
//    Actual data is stored between __upper_font_data and __upper_font_data_end,
//    and uses 0x081b9a3a - 0x08132040 = 879FA = 542 KB.
//
extern const tFont Awe48;
extern const tFont FontT24;
extern const tFont FontT42;
extern const tFont FontT48;
extern const tFont FontT54;
extern const tFont FontT84;
extern const tFont FontT105;
extern const tFont FontT144;

extern const tFont Batt24;

extern const tImage ImgHWcolor;
extern const tImage ImgOSTC;

extern const uint32_t indexHWcolor[indexHWcolorSIZE];

// Macro to store in UPPER rom font sections
/* TODO: Looking at older map files the directories should be placed within the firmware memory */
/*       As well as the image data => to be confirmed */ 
#define UPPER_FONT_DIRECTORY __attribute__ (( used, section(".upper_font_directory") ))

#define UPPER_IMAGE_DIRECTORY __attribute__(( section(".lower_image_directory") ))
#define UPPER_IMAGES          __attribute__(( section(".lower_images") ))

#endif // GFX_FONTS_H