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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 5f11787b4f42
children 1b9847d40e81
line wrap: on
line source

/**
  ******************************************************************************
  * @file    check_warning.c
  * @author  heinrichs weikamp gmbh
  * @date    17-Nov-2014
  * @version V0.0.1
  * @since   17-Nov-2014
  * @brief   check and set warnings for warnings
  *
  @verbatim
  ==============================================================================
              ##### How to use #####
  ==============================================================================
  OSTC3 Warnings:
		niedriger Batteriezustand (
		zu hoher oder zu niedriger Sauerstoffpartialdruck (ppO2) 0.2 - 1.6
		zu hoher CNS (Gefahr der Sauerstoffvergiftung) 90%
		zu hohe Gradientenfaktoren 90 - 90
		Missachtung der Dekostopps (der �berschrittene Dekostopp wird rot angezeigt) 0 m
		zu hohe Aufstiegsgeschwindigkeit 30 m/min
		aGF-Warnung: die Berechnung der Dekompression wird �ber alternative GF-Werte durchgef�hrt
		Fallback-Warnung bei ausgefallenem Sensor

	@endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/

#include "data_exchange.h"
#include "check_warning.h"
#include "settings.h"
#include "decom.h"
#include "tCCR.h"

/* Private variables wit access ----------------------------------------------*/
uint8_t betterGasId = 0;
uint8_t betterSetpointId = 0;
int8_t fallback = 0;

/* Private function prototypes -----------------------------------------------*/
int8_t check_fallback(SDiveState * pDiveState);
int8_t check_ppO2(SDiveState * pDiveState);
int8_t check_O2_sensors(SDiveState * pDiveState);
int8_t check_CNS(SDiveState * pDiveState);
int8_t check_Deco(SDiveState * pDiveState);
int8_t check_AscentRate(SDiveState * pDiveState);
int8_t check_aGF(SDiveState * pDiveState);
int8_t check_BetterGas(SDiveState * pDiveState);
int8_t check_BetterSetpoint(SDiveState * pDiveState);
int8_t check_Battery(SDiveState * pDiveState);

int8_t check_helper_same_oxygen_and_helium_content(SGasLine * gas1, SGasLine * gas2);

/* Exported functions --------------------------------------------------------*/

void check_warning(void)
{
	SDiveState * pDiveState;

	if(stateUsed == stateRealGetPointer())
		pDiveState = stateRealGetPointerWrite();
	else
		pDiveState = stateSimGetPointerWrite();

  check_warning2(pDiveState);
}


void check_warning2(SDiveState * pDiveState)
{
  pDiveState->warnings.numWarnings = 0;

	pDiveState->warnings.numWarnings += check_aGF(pDiveState);
	pDiveState->warnings.numWarnings += check_AscentRate(pDiveState);
	pDiveState->warnings.numWarnings += check_CNS(pDiveState);
	pDiveState->warnings.numWarnings += check_Deco(pDiveState);
	pDiveState->warnings.numWarnings += check_ppO2(pDiveState);
	pDiveState->warnings.numWarnings += check_O2_sensors(pDiveState);
	pDiveState->warnings.numWarnings += check_BetterGas(pDiveState);
	pDiveState->warnings.numWarnings += check_BetterSetpoint(pDiveState);
	pDiveState->warnings.numWarnings += check_Battery(pDiveState);
	pDiveState->warnings.numWarnings += check_fallback(pDiveState);
}


void set_warning_fallback(void)
{
	fallback = 1;
}


void clear_warning_fallback(void)
{
	fallback = 0;
}


uint8_t actualBetterGasId(void)
{
	return betterGasId;
}


uint8_t actualBetterSetpointId(void)
{
	return betterSetpointId;
}


uint8_t actualLeftMaxDepth(const SDiveState * pDiveState)
{
	if(pDiveState->lifeData.depth_meter > (pDiveState->lifeData.max_depth_meter - 3.0f))
		return 0;
	else
		return 1;
}


/* Private functions ---------------------------------------------------------*/
int8_t check_fallback(SDiveState * pDiveState)
{
	if(fallback && ((pDiveState->mode != MODE_DIVE) || (pDiveState->diveSettings.diveMode != DIVEMODE_CCR)))
		fallback = 0;
	
	pDiveState->warnings.fallback = fallback;
	return pDiveState->warnings.fallback;
}


int8_t check_ppO2(SDiveState * pDiveState)
{
	if(pDiveState->mode != MODE_DIVE)
	{
		pDiveState->warnings.ppO2Low = 0;
		pDiveState->warnings.ppO2High = 0;
		return 0;
	}

	uint8_t localPPO2, testPPO2high;

	if(pDiveState->lifeData.ppO2 < 0)
		localPPO2 = 0;
	else
	if(pDiveState->lifeData.ppO2 >= 2.5f)
		localPPO2 = 255;
	else
	localPPO2 = (uint8_t)(pDiveState->lifeData.ppO2 * 100);

	if((localPPO2 + 1) <= settingsGetPointer()->ppO2_min)
			pDiveState->warnings.ppO2Low = 1;
	else
			pDiveState->warnings.ppO2Low = 0;
	
	if(actualLeftMaxDepth(pDiveState))
		testPPO2high = settingsGetPointer()->ppO2_max_deco;
	else
		testPPO2high = settingsGetPointer()->ppO2_max_std;

	if(localPPO2 >= (testPPO2high + 1))
			pDiveState->warnings.ppO2High = 1;
	else
			pDiveState->warnings.ppO2High = 0;

	return pDiveState->warnings.ppO2Low + pDiveState->warnings.ppO2High;
}


int8_t check_O2_sensors(SDiveState * pDiveState)
{
	pDiveState->warnings.sensorLinkLost = 0;
	pDiveState->warnings.sensorOutOfBounds[0] = 0;
	pDiveState->warnings.sensorOutOfBounds[1] = 0;
	pDiveState->warnings.sensorOutOfBounds[2] = 0;

	if((pDiveState->diveSettings.diveMode == DIVEMODE_CCR) && (pDiveState->diveSettings.CCR_Mode == CCRMODE_Sensors))
	{
		if(!get_HUD_battery_voltage_V())
			pDiveState->warnings.sensorLinkLost = 1;
		
		test_HUD_sensor_values_outOfBounds(&pDiveState->warnings.sensorOutOfBounds[0], &pDiveState->warnings.sensorOutOfBounds[1], &pDiveState->warnings.sensorOutOfBounds[2]);
		
	}
	return 		pDiveState->warnings.sensorLinkLost
					+ pDiveState->warnings.sensorOutOfBounds[0]
					+ pDiveState->warnings.sensorOutOfBounds[1]
					+ pDiveState->warnings.sensorOutOfBounds[2];
}


int8_t check_BetterGas(SDiveState * pDiveState)
{
	if(stateUsed->mode != MODE_DIVE)
	{
		pDiveState->warnings.betterGas = 0;
		betterGasId = 0;
		return 0;
	}

	uint8_t  gasIdOffset;
	uint8_t bestGasDepth, betterGasIdLocal;

  SLifeData* pLifeData = &pDiveState->lifeData;
  SDiveSettings* pDiveSettings = &pDiveState->diveSettings;

  pDiveState->warnings.betterGas = 0;
	betterGasId = 0;
	betterGasIdLocal = pLifeData->actualGas.GasIdInSettings;
	bestGasDepth = 255;

	if(pDiveSettings->diveMode == DIVEMODE_CCR)
		gasIdOffset = NUM_OFFSET_DILUENT;
	else
		gasIdOffset = 0;

	/* life data is float, gas data is uint8 */
	if(actualLeftMaxDepth(pDiveState)) /* deco gases */
	{
		for(int i=1+gasIdOffset; i<= 5+gasIdOffset; i++)
		{
			if(	 (pDiveSettings->gas[i].note.ub.active)
				&& (pDiveSettings->gas[i].note.ub.deco)
				&& (pDiveSettings->gas[i].depth_meter)
				&& (pDiveSettings->gas[i].depth_meter >= (pLifeData->depth_meter - 0.01f ))
				&& (pDiveSettings->gas[i].depth_meter <= bestGasDepth)
				)
				{
					betterGasIdLocal = i;
					bestGasDepth = pDiveSettings->gas[i].depth_meter;
				}
		}

		if(betterGasIdLocal != pLifeData->actualGas.GasIdInSettings)
		{
			if(!check_helper_same_oxygen_and_helium_content(&pDiveSettings->gas[betterGasIdLocal], &pDiveSettings->gas[pLifeData->actualGas.GasIdInSettings]))
			{
				betterGasId = betterGasIdLocal;
				pDiveState->warnings.betterGas = 1;
			}
		}
	}
	else /* travel gases */
	{
	  bestGasDepth = 0;
	  //check for travalgas
	  for(int i=1+gasIdOffset; i<= 5+gasIdOffset; i++)
    {
      if(	 (pDiveSettings->gas[i].note.ub.active)
        && (pDiveSettings->gas[i].note.ub.travel)
        && (pDiveSettings->gas[i].depth_meter_travel)
        && (pDiveSettings->gas[i].depth_meter_travel <= (pLifeData->depth_meter + 0.01f ))
        && (pDiveSettings->gas[i].depth_meter_travel >= bestGasDepth)
        )
        {
          betterGasIdLocal = i;
          bestGasDepth = pDiveSettings->gas[i].depth_meter;
        }
    }

    if(betterGasIdLocal != pLifeData->actualGas.GasIdInSettings)
    {
			if(!check_helper_same_oxygen_and_helium_content(&pDiveSettings->gas[betterGasIdLocal], &pDiveSettings->gas[pLifeData->actualGas.GasIdInSettings]))
			{
				betterGasId = betterGasIdLocal;
				pDiveState->warnings.betterGas = 1;
			}
    }
	}
	return pDiveState->warnings.betterGas;
}

/* check for better travel!!! setpoint hw 151210
 */ 
int8_t check_BetterSetpoint(SDiveState * pDiveState)
{
	pDiveState->warnings.betterSetpoint = 0;
	betterSetpointId = 0;

	if((stateUsed->mode != MODE_DIVE) || (pDiveState->diveSettings.diveMode != DIVEMODE_CCR) || (pDiveState->diveSettings.CCR_Mode != CCRMODE_FixedSetpoint))
	{
		return 0;
	}
	
	uint8_t bestSetpointDepth = 0; // travel the deeper, the better
	uint8_t betterSetpointIdLocal = 0; // nothing better

	if(!actualLeftMaxDepth(pDiveState)) /* travel gases */
	{
		for(int i=1; i<=NUM_GASES; i++)
		{
			if(	 (pDiveState->diveSettings.setpoint[i].note.ub.active)
				&& (pDiveState->diveSettings.setpoint[i].depth_meter)
				&& (pDiveState->diveSettings.setpoint[i].depth_meter <= ( pDiveState->lifeData.depth_meter + 0.01f ))
				&& (pDiveState->diveSettings.setpoint[i].depth_meter >= bestSetpointDepth)
			)
				{
					betterSetpointIdLocal = i;
					bestSetpointDepth = pDiveState->diveSettings.setpoint[i].depth_meter;
				}
		}
		if((betterSetpointIdLocal) && (pDiveState->diveSettings.setpoint[betterSetpointIdLocal].setpoint_cbar  != pDiveState->lifeData.actualGas.setPoint_cbar))
		{
			betterSetpointId = betterSetpointIdLocal;
			pDiveState->warnings.betterSetpoint = 1;
		}
	}
	return pDiveState->warnings.betterSetpoint;
}


/* hw 151030
 */
int8_t check_helper_same_oxygen_and_helium_content(SGasLine * gas1, SGasLine * gas2) 
{
	if(gas1->helium_percentage != gas2->helium_percentage)
		return 0;
	else
	if(gas1->oxygen_percentage != gas2->oxygen_percentage)
		return 0;
	else
		return 1;
}


int8_t check_CNS(SDiveState * pDiveState)
{
	if(stateUsed->mode != MODE_DIVE)
	{
		pDiveState->warnings.cnsHigh = 0;
		return 0;
	}
	
	if(pDiveState->lifeData.cns >= (float)(settingsGetPointer()->CNS_max))
			pDiveState->warnings.cnsHigh = 1;
	else
			pDiveState->warnings.cnsHigh = 0;
	return pDiveState->warnings.cnsHigh;
}


int8_t check_Battery(SDiveState * pDiveState)
{
	if(pDiveState->lifeData.battery_charge < 10)
		pDiveState->warnings.lowBattery = 1;
	else
		pDiveState->warnings.lowBattery = 0;
	
  return pDiveState->warnings.lowBattery;
}


int8_t check_Deco(SDiveState * pDiveState)
{
	if(stateUsed->mode != MODE_DIVE)
	{
		pDiveState->warnings.decoMissed = 0;
		return 0;
	}

	uint8_t depthNext = decom_get_actual_deco_stop(pDiveState);
	
	if(!depthNext)
      pDiveState->warnings.decoMissed = 0;
	else
  if(pDiveState->lifeData.depth_meter + 0.1f < (float)depthNext)
      pDiveState->warnings.decoMissed = 1;
  else
      pDiveState->warnings.decoMissed = 0;
	
  return pDiveState->warnings.decoMissed;
}


int8_t check_AscentRate(SDiveState * pDiveState)
{
	if(stateUsed->mode != MODE_DIVE)
	{
		pDiveState->warnings.ascentRateHigh = 0;
		return 0;
	}

	float warnAscentRateFloat;

	warnAscentRateFloat = (float)(settingsGetPointer()->ascent_MeterPerMinute_max);

	if(pDiveState->lifeData.ascent_rate_meter_per_min >= warnAscentRateFloat)
			pDiveState->warnings.ascentRateHigh = 1;
	else
			pDiveState->warnings.ascentRateHigh = 0;
	return pDiveState->warnings.ascentRateHigh;
}


int8_t check_aGF(SDiveState * pDiveState)
{
	if(stateUsed->mode != MODE_DIVE)
	{
		pDiveState->warnings.aGf = 0;
		return 0;
	}

  pDiveState->warnings.aGf = 0;
  if(pDiveState->diveSettings.deco_type.ub.standard == GF_MODE)
  {
    if((pDiveState->diveSettings.gf_high != settingsGetPointer()->GF_high) || (pDiveState->diveSettings.gf_low != settingsGetPointer()->GF_low))
      pDiveState->warnings.aGf = 1;
  }
  return pDiveState->warnings.aGf;
}

/************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/