Mercurial > public > ostc4
view Discovery/Inc/t7.h @ 319:d8e86af78474 fix-version
bugfix: correct packed main version number in dive header
This fixes a rather mysterious bug. Users report that up to 1.3.5 beta,
a correct version number is shown in libdivecomputer based
applications (like in Subsurface, in the extra data tab). Careful
examining the code in both libdivecomputer and the firmware shows
a subtle error in the bit mask and shift operation to pack a full
X.Y.Z.beta version number in 2 bytes (as is available in the
dive header) in the firmware end (as the libdivecomputer code
looks sane, assuming this is the right way to pack things).
Likely, this bug crept in in the conversion from the closed
source Keil period into the open source GCC setup of
the code base. So its impossible to document the exact
history of this problem here.
Further notice that the main version number is only 1 of 3 version
numbers, denoting the full version of the firmware (besides Font
and RTE).
Finally notice that this way of packing is limited to 2^5 bits
(decimal 32), so we could easily build a 1.4.21, but not a
1.4.55.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author | Jan Mulder <jlmulder@xs4all.nl> |
---|---|
date | Wed, 19 Jun 2019 14:31:50 +0200 |
parents | 5f11787b4f42 |
children | b111fc4250e9 |
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/////////////////////////////////////////////////////////////////////////////// /// -*- coding: UTF-8 -*- /// /// \file Discovery/Inc/t7.h /// \brief Header file of Divemode with 7 windows plus plugin /// \author heinrichs weikamp gmbh /// \date 23-April-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 T7_H #define T7_H /* Includes ------------------------------------------------------------------*/ #include "stm32f4xx_hal.h" #include "gfx_engine.h" /* Exported functions --------------------------------------------------------*/ void t7_init(void); void t7_refresh(void); void t7_refresh_sleepmode_fun(void); void t7_refresh_customview_old(void); void t7_change_field(void); void t7_change_customview(void); void t7_set_field_to_primary(void); void t7_set_customview_to_primary(void); void init_t7_compass(void); /* void t7c_refresh(uint32_t FramebufferStartAddress); */ #endif /* T7_H */