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view Small_CPU/Src/batteryCharger.c @ 859:d32901746950 Evo_2_23

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Improvment battery charger visualization: In the previous version the green flash (charge complete) was shown even battery had not reached 100% charge. Root cause was that the pin signaling the end of charge could be raised for other reasons then a full battery. The new version will show the green flash only in case the battery is rated as full. In addition the graph visualization has been updated to continously progress. In the previous version it only progressed in case the charge value changed. Especially at charging start the charger is doing some battery evaluation which does not increase the charge state. In such a case the graph seemed to be frozen.
author Ideenmodellierer
date Tue, 07 May 2024 21:20:33 +0200
parents b1e24513b83e
children
line wrap: on
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/**
  ******************************************************************************
  * @file    batteryCharger.c 
  * @author  heinrichs weikamp gmbh
  * @date    09-Dec-2014
  * @version V0.0.1
  * @since   09-Dec-2014
  * @brief   LTC4054 Battery Charger
  *           
  @verbatim                 
  ============================================================================== 
                        ##### How to use #####
  ============================================================================== 

The bq5105x provides one status output, CHG. This output is an open-drain NMOS device that is rated to 20 V.
The open-drain FET connected to the CHG pin will be turned on whenever the output (BAT) of the charger is
enabled. As a note, the output of the charger supply will not be enabled if the VRECT-REG does not converge to the
no-load target voltage.

CHG F4 7 O Open-drain output � active when BAT is enabled. Float if not used.

@endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2015 heinrichs weikamp</center></h2>
  *
  ******************************************************************************
  */ 
/* Includes ------------------------------------------------------------------*/
#include "batteryCharger.h"
#include "batteryGasGauge.h"
#include "stm32f4xx_hal.h"
#include "scheduler.h"


#define CHARGER_DEBOUNCE_SECONDS	(6u)		/* 6 seconds used to avoid problems with charger interrupts / disconnections */

static uint16_t battery_charger_counter = 0;
static chargerState_t batteryChargerState = Charger_NotConnected;

void set_charge_state(uint8_t newState)
{
	if(newState < Charger_END)
	{
		batteryChargerState = newState;
	}
}

uint8_t get_charge_state(void)
{
	return batteryChargerState;
}

void init_battery_charger_status(void)
{
	#ifdef OSTC_ON_DISCOVERY_HARDWARE
		return;
	#endif

  CHARGE_IN_GPIO_ENABLE();
  CHARGE_OUT_GPIO_ENABLE();
	
	ReInit_battery_charger_status_pins();
}

void ReInit_battery_charger_status_pins(void)
{
	#ifdef OSTC_ON_DISCOVERY_HARDWARE
		return;
	#endif

  GPIO_InitTypeDef   GPIO_InitStructure;

  GPIO_InitStructure.Pin = CHARGE_IN_PIN;
  GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
  GPIO_InitStructure.Pull = GPIO_NOPULL;
  GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
  HAL_GPIO_Init(CHARGE_IN_GPIO_PORT, &GPIO_InitStructure); 

  GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
  GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStructure.Pull = GPIO_NOPULL;
  GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
  HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure); 
}


void DeInit_battery_charger_status_pins(void)
{
	#ifdef OSTC_ON_DISCOVERY_HARDWARE
		return;
	#endif
  GPIO_InitTypeDef   GPIO_InitStructure;


	GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
  GPIO_InitStructure.Pull = GPIO_NOPULL;

  GPIO_InitStructure.Pin = CHARGE_IN_PIN;
  HAL_GPIO_Init(CHARGE_IN_GPIO_PORT, &GPIO_InitStructure); 

  GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
  HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure); 
}

void battery_charger_get_status_and_contral_battery_gas_gauge(uint8_t cycleTimeBase)
{
	static uint8_t notifyChargeComplete = 0;

	#ifdef OSTC_ON_DISCOVERY_HARDWARE
		return;
	#endif
	
	if(batteryChargerState == Charger_ColdStart)	/* wait for the first valid voltage meassurement */
	{
		if(global.lifeData.battery_voltage != BATTERY_DEFAULT_VOLTAGE)	/* wait for first valid voltage value */
		{
			if((global.lifeData.battery_voltage < BATTERY_CHARGER_CONNECTED_VOLTAGE)
					&& (global.lifeData.battery_voltage > BATTERY_ENDOF_CHARGE_VOLTAGE)) 	/* Voltage close to full state => maybe new battery inserted 	*/
			{
				battery_gas_gauge_set_charge_full();
			}
			batteryChargerState = Charger_NotConnected;
		}
	}
	else
	{	/* on disconnection or while disconnected */
		if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN))
		{
			switch(batteryChargerState)
			{
				case Charger_WarmUp:
				case Charger_Active:				global.dataSendToMaster.chargeStatus = CHARGER_lostConnection;
													global.deviceDataSendToMaster.chargeStatus = CHARGER_lostConnection;
													batteryChargerState = Charger_LostConnection;
													if(cycleTimeBase > CHARGER_DEBOUNCE_SECONDS)	/* adapt connection lost detection to sleep mode */
													{
														battery_charger_counter = cycleTimeBase + 1;
													}
													else
													{
														battery_charger_counter = CHARGER_DEBOUNCE_SECONDS;
													}
											break;
				case Charger_Finished:				if((get_voltage() >= BATTERY_ENDOF_CHARGE_VOLTAGE) && (get_voltage() < BATTERY_CHARGER_CONNECTED_VOLTAGE)) /* stopping does not necessarily mean battery is full */
													{
														global.dataSendToMaster.chargeStatus = CHARGER_complete;
														global.deviceDataSendToMaster.chargeStatus = CHARGER_complete;
														notifyChargeComplete = 1;
													}
													battery_charger_counter = 10;
													batteryChargerState = Charger_LostConnection;
					/* no break */
				case Charger_LostConnection:		/* the charger stops charging when charge current is 1/10 	*/
													/* Basically it is OK to rate a charging as complete if a defined voltage is reached */
													if(((battery_gas_gauge_isChargeValueValid() == 0) || (global.lifeData.battery_charge < 90)) && (get_voltage() >= BATTERY_ENDOF_CHARGE_VOLTAGE) && (get_voltage() < BATTERY_CHARGER_CONNECTED_VOLTAGE))
													{
														notifyChargeComplete = 1;
													}
													if(battery_charger_counter >= cycleTimeBase)
													{
														battery_charger_counter -= cycleTimeBase;
													}
													else
													{
														battery_charger_counter = 0;

														global.dataSendToMaster.chargeStatus = CHARGER_off;
														global.deviceDataSendToMaster.chargeStatus = CHARGER_off;

														if(notifyChargeComplete)
														{
															battery_gas_gauge_set_charge_full();
															scheduleUpdateDeviceDataChargerFull();
														}
														notifyChargeComplete = 0;
														batteryChargerState = Charger_NotConnected;
													}
											break;
				default:				 			batteryChargerState = Charger_NotConnected; 	/* unexpected state => reinitialize state machine */
					break;
			}
		}
		else
		{
			/* connected */
			/* wait for disconnection to write and reset */
			switch(batteryChargerState)
			{
					case Charger_NotConnected:		battery_charger_counter = 0;
													batteryChargerState = Charger_WarmUp;
											break;
					case Charger_LostConnection:		batteryChargerState = Charger_Active;
											break;
					case Charger_WarmUp:			battery_charger_counter += cycleTimeBase;
													if(battery_charger_counter >= CHARGER_DEBOUNCE_SECONDS )
													{
														scheduleUpdateDeviceDataChargerCharging();
														batteryChargerState = Charger_Active;
													}
							/* no break */
					case Charger_Finished:
					case Charger_Active:			global.dataSendToMaster.chargeStatus = CHARGER_running;
													global.deviceDataSendToMaster.chargeStatus = CHARGER_running;

													/* drive the output pin high to determine the state of the charger */
													GPIO_InitTypeDef   GPIO_InitStructure;
													GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
													GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
													GPIO_InitStructure.Pull = GPIO_NOPULL;
													GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
													HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
													HAL_GPIO_WritePin(CHARGE_OUT_GPIO_PORT, CHARGE_OUT_PIN,GPIO_PIN_SET);
													HAL_Delay(1);

													if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN))		/* high => charger stopped charging */
													{
														battery_charger_counter = 30;
														batteryChargerState = Charger_Finished;
													}
													else
													{
														if(global.lifeData.battery_charge > 100.0)				/* still charging but indicator is set to full => decrease to 99% to keep count increasing */
														{
															battery_gas_gauge_set(99.0);
														}
														if(batteryChargerState == Charger_Finished)				/* voltage dropped below the hysteresis again => charging restarted */
														{
															batteryChargerState = Charger_Active;
															notifyChargeComplete = 0;
														}
													}

													/* restore high impedance to be able to detect disconnection */
													GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
													GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
													GPIO_InitStructure.Pull = GPIO_NOPULL;
													GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
													HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
													HAL_Delay(1);
											break;

					default:						batteryChargerState = Charger_NotConnected; 	/* unexpected state => reinitialize state machine */
						break;
			}
		}
	}
}

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