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view Common/Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_sai_ex.h @ 224:ceecabfddb57 div-fixes-3
Bugfix, deco: fix 2 (small) problems with calculated ceiling
This fixes 1 trivial, and 1 not really trivial bug in the calculation
of the ceiling. When simulating a bounce dive to 80m, things become
clear (tried this on a CCR dive, fixed setpoint 1.2bar, about 15 minutes
of bottom time). Closely watch the behavior of the ceiling data. At some
point during the ascent, the ceiling begins to decrease in 10cm steps.
Then suddenly (while still ascending), the ceiling increases again with 1m,
does not change for some time, and then suddenly steps 1.1m less deep.
While not very relevant to real deco diving, it is simply wrong.
The reason for this is subtle. The algorithm used to find the ceiling
is a sort of linear search, stepping down a meter, overshoot the depth, and
search back in 10cm steps. It seems some numerical instability. Fixing
this, was a bit more computational intensive search by stepping up down in
equal steps of 10cm. But, I'm pretty sure that things can be speeded up here, as a
ceiling does not change fast, so it should be not that difficult to limit
the search space, or use a binary search algorithm instead.
The trivial second problem fixed, is that the ceiling ends at the surface
and not at 1m depth. This small issue became visible after changing the step
down size above.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author | Jan Mulder <jlmulder@xs4all.nl> |
---|---|
date | Sun, 31 Mar 2019 19:35:51 +0200 |
parents | c78bcbd5deda |
children |
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/** ****************************************************************************** * @file stm32f4xx_hal_sai_ex.h * @author MCD Application Team * @brief Header file of SAI Extension HAL module. ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> * * 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 of STMicroelectronics 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 HOLDER 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. * ****************************************************************************** */ /* Define to prevent recursive inclusion -------------------------------------*/ #ifndef __STM32F4xx_HAL_SAI_EX_H #define __STM32F4xx_HAL_SAI_EX_H #ifdef __cplusplus extern "C" { #endif /* Includes ------------------------------------------------------------------*/ #include "stm32f4xx_hal_def.h" /** @addtogroup STM32F4xx_HAL_Driver * @{ */ /** @addtogroup SAIEx * @{ */ #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) || \ defined(STM32F446xx) || defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F413xx) || \ defined(STM32F423xx) /* Exported types ------------------------------------------------------------*/ /* Exported constants --------------------------------------------------------*/ /** @defgroup SAI_Clock_Source SAI Clock Source * @{ */ #if defined(STM32F413xx) || defined(STM32F423xx) #define SAI_CLKSOURCE_PLLI2S 0x00000000U #define SAI_CLKSOURCE_EXT 0x00100000U #define SAI_CLKSOURCE_PLLR 0x00200000U #define SAI_CLKSOURCE_HS 0x00300000U #else #define SAI_CLKSOURCE_PLLSAI 0x00000000U #define SAI_CLKSOURCE_PLLI2S 0x00100000U #define SAI_CLKSOURCE_EXT 0x00200000U #define SAI_CLKSOURCE_NA 0x00400000U /*!< No applicable for STM32F446xx */ #endif /** * @} */ /* Exported functions --------------------------------------------------------*/ /** @addtogroup SAIEx_Exported_Functions * @{ */ /** @addtogroup SAIEx_Exported_Functions_Group1 * @{ */ /* Extended features functions ************************************************/ void SAI_BlockSynchroConfig(SAI_HandleTypeDef *hsai); uint32_t SAI_GetInputClock(SAI_HandleTypeDef *hsai); /** * @} */ /** * @} */ /* Private types -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private constants ---------------------------------------------------------*/ /* Private macros ------------------------------------------------------------*/ #if defined(STM32F413xx) || defined(STM32F423xx) #define IS_SAI_CLK_SOURCE(SOURCE) (((SOURCE) == SAI_CLKSOURCE_PLLI2S) ||\ ((SOURCE) == SAI_CLKSOURCE_EXT)||\ ((SOURCE) == SAI_CLKSOURCE_PLLR)||\ ((SOURCE) == SAI_CLKSOURCE_HS)) #else #define IS_SAI_CLK_SOURCE(SOURCE) (((SOURCE) == SAI_CLKSOURCE_PLLSAI) ||\ ((SOURCE) == SAI_CLKSOURCE_EXT)||\ ((SOURCE) == SAI_CLKSOURCE_PLLI2S)||\ ((SOURCE) == SAI_CLKSOURCE_NA)) #endif /* Private functions ---------------------------------------------------------*/ #endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx || STM32F469xx || STM32F479xx || STM32F413xx || STM32F423xx */ /** * @} */ /** * @} */ #ifdef __cplusplus } #endif #endif /* __STM32F4xx_HAL_SAI_EX_H */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/