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Stability improvment bluetooth startup: The previous implementation expected a default setup of the Bluetooth module. Deviations from the default expectation caused the init function to stop. The new implementation is able to fix wrong baud rate setting (reset baudrate to default 115200). In addition the function evaluating the answers of the module is not able to derive the status out of a data stream.
author Ideenmodellierer
date Tue, 21 Dec 2021 19:36:41 +0100
parents 1b995079c045
children 079bb5b22c06
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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"


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

#define CHARGER_DEBOUNCE_SECONDS	(6u)		/* 6 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
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 set_charge_state(uint8_t newState)
{
#ifdef ENABLE_CHARGER_STATUS_V2
	if(newState < Charger_END)
	{
		batteryChargerState = newState;
	}
#endif
}

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); 
}

/* 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;
	static float chargeValueAtStart = 0;
#endif 

	#ifdef OSTC_ON_DISCOVERY_HARDWARE
		return;
	#endif
	
#ifdef ENABLE_CHARGER_STATUS_V2

	if(batteryChargerState == Charger_ColdStart)	/* wait for the first valid voltage meassurement */
	{
		if(global.lifeData.battery_voltage != BATTERY_DEFAULT_VOLTAGE)
		{
			if(global.lifeData.battery_voltage > BATTERY_ENDOF_CHARGE_VOLTAGE) 						/* Voltage close to full state => maybe new battery inserted 	*/
			{
				battery_gas_gauge_set_charge_full();
			}
			else										/* unknown state => reset to 0% */
			{
				battery_gas_gauge_set(0);
			}
			batteryChargerState = Charger_NotConnected;
		}
	}
	else
	{	/* 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;
											break;
				case Charger_LostConnection:		if(get_voltage() >= BATTERY_ENDOF_CHARGE_VOLTAGE)	 	/* 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;
														notifyChargeComplete = 1;
													}
				/* no break */
				case Charger_WarmUp:
				case Charger_Finished:				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;
														battery_i_charge_status = 0;
														global.dataSendToMaster.chargeStatus = CHARGER_off;
														global.deviceDataSendToMaster.chargeStatus = CHARGER_off;

														if(notifyChargeComplete)
														{
															battery_gas_gauge_set_charge_full();
															scheduleUpdateDeviceDataChargerFull();
															notifyChargeComplete = 0;
															if(cycleTimeBase > 2)
															{
																HAL_Delay(50);		/* I2C operations are pending in the background. Wait to avoid data loose in caused to potential change to sleep state */
															}
														}
														else
														{
															if(chargeValueAtStart < 1.0) /* charging started with unknown value => reset charge state reported by charger */
															{
																battery_gas_gauge_set(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;
													chargeValueAtStart = global.lifeData.battery_charge;
											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);
													HAL_Delay(1);
											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****/