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view Small_CPU/Inc/batteryCharger.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 | 5f11787b4f42 |
| children | 5149cd644fbc |
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/** ****************************************************************************** * @file batteryCharger.h * @author heinrichs weikamp gmbh * @date 09-Dec-2014 * @version V0.0.1 * @since 09-Dec-2014 * @brief LTC4054 Standalone Linear Li-Ion Battery Charger * @verbatim ============================================================================== ##### How to use ##### ============================================================================== @endverbatim ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2015 heinrichs weikamp</center></h2> * ****************************************************************************** */ /* Define to prevent recursive inclusion -------------------------------------*/ #ifndef BATTERY_CHARGER_H #define BATTERY_CHARGER_H #ifdef __cplusplus extern "C" { #endif /* Includes ------------------------------------------------------------------*/ #include <stdint.h> uint8_t get_charge_status(void); void init_battery_charger_status(void); void ReInit_battery_charger_status_pins(void); void DeInit_battery_charger_status_pins(void); void battery_charger_get_status_and_contral_battery_gas_gauge(uint8_t inSleepModeLessCounts); #ifdef __cplusplus } #endif #endif /* BATTERY_CHARGER_H */ /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/