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view Small_CPU/Src/batteryCharger.c @ 643:5149cd644fbc

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Reimplemented charger status generation (deactivated): Sometimes the original implementation never reached the state fully charged for unknown reason. The code already contained a function which set the status to fully charger even it was not signaled by the charger (in case voltage is > 4.1V). The new implementation changed the handling of the detection and the OSTC showing the problem now reaches the fully charger status. As the new implementation is still under test it is deactivated => original implementation is active per default
author Ideenmodellierer
date Wed, 24 Mar 2021 22:06:00 +0100
parents 5f11787b4f42
children ebe3fc302ab8
line wrap: on
line source

/**
  ******************************************************************************
  * @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"


/* Use This compile switch to select the new charger status control implementation */
/* #define ENABLE_CHARGER_STATUS_V2 */

#define CHARGE_IN_PIN							GPIO_PIN_2
#define CHARGE_IN_GPIO_PORT				GPIOC
#define CHARGE_IN_GPIO_ENABLE()		__GPIOC_CLK_ENABLE()

#define CHARGE_OUT_PIN						GPIO_PIN_1
#define CHARGE_OUT_GPIO_PORT			GPIOC
#define CHARGE_OUT_GPIO_ENABLE()	__GPIOC_CLK_ENABLE()

#define CHARGER_DEBOUNCE_SECONDS	(120u)		/* 120 seconds used to avoid problems with charger interrupts / disconnections */

uint8_t battery_i_charge_status = 0;
uint16_t battery_charger_counter = 0;

#ifdef ENABLE_CHARGER_STATUS_V2
typedef enum
{
	Charger_NotConnected = 0,		/* This is identified reading CHARGE_IN_PIN == HIGH */
	Charger_WarmUp,					/* Charging started but counter did not yet reach a certain limit (used to debounce connect / disconnect events to avoid multiple increases of statistic charging cycle counter) */
	Charger_Active,					/* Charging identified by  CHARGE_IN_PIN == LOW for a certain time */
	Charger_Finished,
	Charger_LostConnection			/* Intermediate state to debounce disconnecting events (including charging error state like over temperature) */
} chargerState_t;

static chargerState_t batteryChargerState = Charger_NotConnected;
#endif

/* can be 0, 1 or 255
 * 0 is disconnected
 * 1 is charging
 * 255 is full
 */
uint8_t get_charge_status(void)
{
	return battery_i_charge_status;
}

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); 
}

/* static counter is used to avoid multiple counts of charge startings
	 and after that it is used, starting at 127 to count for the charge full signal

	there a short disconnections with the QI charger
	therefore the battery_charger_counter has a countdown instead of = 0.

	battery_gas_gauge_set_charge_full and  scheduleUpdateDeviceDataChargerFull are
	set after disconnection as the charging process continues as long as not disconnected
  to prevent the short disconnections the battery_charger_counter is used too including
	upcounting again while battery_i_charge_status == 255 and the connection is established

 */

void battery_charger_get_status_and_contral_battery_gas_gauge(uint8_t cycleTimeBase)
{
#ifdef ENABLE_CHARGER_STATUS_V2
	static uint8_t notifyChargeComplete = 0;
#endif 

	#ifdef OSTC_ON_DISCOVERY_HARDWARE
		return;
	#endif
	
#ifdef ENABLE_CHARGER_STATUS_V2
	/* on disconnection or while disconnected */
	if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN))
	{
		switch(batteryChargerState)
		{
			case Charger_Active:				global.dataSendToMaster.chargeStatus = CHARGER_lostConnection;
												global.deviceDataSendToMaster.chargeStatus = CHARGER_lostConnection;
												batteryChargerState = Charger_LostConnection;
												battery_charger_counter = CHARGER_DEBOUNCE_SECONDS;

												if(get_voltage() >= 4.1f)			/* 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 */
													batteryChargerState = Charger_Finished;
													global.dataSendToMaster.chargeStatus = CHARGER_complete;
													global.deviceDataSendToMaster.chargeStatus = CHARGER_complete;
													battery_charger_counter = 30;
													notifyChargeComplete = 1;
												}
										break;
			case Charger_WarmUp:
			case Charger_Finished:
			case Charger_LostConnection:		if(battery_charger_counter >= cycleTimeBase)
												{
													battery_charger_counter -= cycleTimeBase;
													global.dataSendToMaster.chargeStatus = CHARGER_lostConnection;
													global.deviceDataSendToMaster.chargeStatus = CHARGER_lostConnection;
													batteryChargerState = Charger_LostConnection;
												}
												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: break;
		}
	}
	else
	{
		/* connected */
		/* wait for disconnection to write and reset */
		switch(batteryChargerState)
		{
				case Charger_NotConnected:		battery_i_charge_status = 1;
												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 )
												{
													battery_i_charge_status = 2;
													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 */
												{
													batteryChargerState = Charger_Finished;
													global.dataSendToMaster.chargeStatus = CHARGER_complete;
													global.deviceDataSendToMaster.chargeStatus = CHARGER_complete;
													battery_charger_counter = 30;
													notifyChargeComplete = 1;
												}
												else
												{
													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);
										break;

				default:						/* wait for disconnection */
					break;
		}
	}
#else
	/* on disconnection or while disconnected */
	if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN))
	{
		if(battery_charger_counter)
		{
			battery_charger_counter--;
			global.dataSendToMaster.chargeStatus = CHARGER_lostConnection;
			global.deviceDataSendToMaster.chargeStatus = CHARGER_lostConnection;
		}
		/* max count down to 127+5 or 127+20 */
		if((battery_i_charge_status == 255) && battery_charger_counter < 127)
		{
//			battery_gas_gauge_set_charge_full();
//			scheduleUpdateDeviceDataChargerFull();
			battery_charger_counter = 0;
		}
		
		if(battery_charger_counter == 0)
		{
			battery_i_charge_status = 0;
			global.dataSendToMaster.chargeStatus = CHARGER_off;
			global.deviceDataSendToMaster.chargeStatus = CHARGER_off;

		}
		return;
	}

	/* connected */
	
	/* wait for disconnection to write and reset */
	if(battery_i_charge_status == 255)
	{
		global.dataSendToMaster.chargeStatus = CHARGER_complete;
		global.deviceDataSendToMaster.chargeStatus = CHARGER_complete;
		
		if(((cycleTimeBase > 1) && (battery_charger_counter < 127+5)) || (battery_charger_counter < 127+20))
		battery_charger_counter++;
		return;
	}

	if(battery_charger_counter == 0)
		battery_i_charge_status = 1;

	/* charger is connected and didn't signal full yet */
	global.dataSendToMaster.chargeStatus = CHARGER_running;
	global.deviceDataSendToMaster.chargeStatus = CHARGER_running;

	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(battery_charger_counter < 120)
	{
		if(cycleTimeBase == 1)
			battery_charger_counter++;
		else
		{
			battery_charger_counter += 30;
			if(battery_charger_counter >= 127)
				battery_charger_counter = 126;
		}
	}
	else
	if(battery_charger_counter < 127)
	{
		battery_charger_counter = 127;
		if(battery_i_charge_status < 2)
		{
			battery_i_charge_status = 2;
			scheduleUpdateDeviceDataChargerCharging();
		}
	}

	if(battery_charger_counter >= 127)
	{
		if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN) || (get_voltage() >= 4.1f))
		{
			battery_charger_counter++;
			if(((cycleTimeBase > 1) && (battery_charger_counter > 127+5)) || (battery_charger_counter > 127+20))
			{
				battery_charger_counter = 127;
				if(get_voltage() >= 4.1f)
				{
					battery_i_charge_status = 255;
					battery_gas_gauge_set_charge_full();
					scheduleUpdateDeviceDataChargerFull();
				}					
			}
		}
		else
			battery_charger_counter = 127;
	}

  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); 
#endif
}

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