Provide precise estimates of remaining battery charge with LC709204V and STM32F410RB
Fuel gauging solution of 1-cell Lithium-ion/Polymer (Li+) batteries
Published Jan 07, 2025
Click board™
BATT-MON 5 Click
Dev. board
Nucleo 64 with STM32F410RB MCU
Compiler
NECTO Studio
MCU
STM32F410RB
Ensure reliable battery performance with precise fuel gauging and safety monitoring
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Hardware Overview
How does it work?
BATT-MON 5 Click is based on the LC709204V, a 1-cell Lithium-ion/Polymer (Li+) battery fuel gauge from onsemi. This highly efficient fuel gauge monitors battery performance with exceptional accuracy and stability while consuming minimal power, making it a perfect solution for modern portable and battery-powered devices. The LC709204V uses the innovative HG-CVR2 algorithm, a proprietary technology that accurately determines a battery's Relative State of Charge (RSOC). This algorithm ensures reliable RSOC readings even under varying and challenging conditions such as fluctuating temperatures, different load demands, aging of the battery, and self-discharge rates. With precise RSOC measurement, the LC709204V optimizes battery usage, extending the operating time of devices like wearables, PDAs, USB-related systems, and configurations such as 1-series N-parallel battery systems. One of the standout features of the
LC709204V is its ease of integration. To begin operation, the HG-CVR2 algorithm requires only a few simple parameter configurations upon battery insertion. This significantly reduces development complexity and allows for rapid deployment in various applications. In addition, the device offers State of Health (SOH) reporting, giving insights into the overall condition and longevity of the battery. This Click board™ is designed in a unique format supporting the newly introduced MIKROE feature called "Click Snap." Unlike the standardized version of Click boards, this feature allows the main IC area to become movable by breaking the PCB, opening up many new possibilities for implementation. Thanks to the Snap feature, the LC709204V can operate autonomously by accessing its signals directly on the pins marked 1-8. Additionally, the Snap part includes a specified and fixed screw hole position, enabling users to secure the Snap board in their desired location.
BATT-MON 5 Click communicates with the host MCU via a standard I2C interface, supporting clock speeds of up to 400kHz for fast and efficient data exchange. To ensure safety and reliability, the board includes an alert interrupt (ALR) pin, activated whenever critical conditions are detected, such as low cell voltage, abnormal temperature, or low Relative State of Charge (RSOC). This integrated alarm functionality provides timely alerts to users, helping to prevent potential issues like over-discharge or unsafe operating conditions, thereby enhancing overall battery safety. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
Nucleo-64 with STM32F410RB MCU offers a cost-effective and adaptable platform for developers to explore new ideas and prototype their designs. This board harnesses the versatility of the STM32 microcontroller, enabling users to select the optimal balance of performance and power consumption for their projects. It accommodates the STM32 microcontroller in the LQFP64 package and includes essential components such as a user LED, which doubles as an ARDUINO® signal, alongside user and reset push-buttons, and a 32.768kHz crystal oscillator for precise timing operations. Designed with expansion and flexibility in mind, the Nucleo-64 board features an ARDUINO® Uno V3 expansion connector and ST morpho extension pin
headers, granting complete access to the STM32's I/Os for comprehensive project integration. Power supply options are adaptable, supporting ST-LINK USB VBUS or external power sources, ensuring adaptability in various development environments. The board also has an on-board ST-LINK debugger/programmer with USB re-enumeration capability, simplifying the programming and debugging process. Moreover, the board is designed to simplify advanced development with its external SMPS for efficient Vcore logic supply, support for USB Device full speed or USB SNK/UFP full speed, and built-in cryptographic features, enhancing both the power efficiency and security of projects. Additional connectivity is
provided through dedicated connectors for external SMPS experimentation, a USB connector for the ST-LINK, and a MIPI® debug connector, expanding the possibilities for hardware interfacing and experimentation. Developers will find extensive support through comprehensive free software libraries and examples, courtesy of the STM32Cube MCU Package. This, combined with compatibility with a wide array of Integrated Development Environments (IDEs), including IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE, ensures a smooth and efficient development experience, allowing users to fully leverage the capabilities of the Nucleo-64 board in their projects.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M4
MCU Memory (KB)
128
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
32768
You complete me!
Accessories
Click Shield for Nucleo-64 comes equipped with two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the STM32 Nucleo-64 board with no effort. This way, Mikroe allows its users to add any functionality from our ever-growing range of Click boards™, such as WiFi, GSM, GPS, Bluetooth, ZigBee, environmental sensors, LEDs, speech recognition, motor control, movement sensors, and many more. More than 1537 Click boards™, which can be stacked and integrated, are at your disposal. The STM32 Nucleo-64 boards are based on the microcontrollers in 64-pin packages, a 32-bit MCU with an ARM Cortex M4 processor operating at 84MHz, 512Kb Flash, and 96KB SRAM, divided into two regions where the top section represents the ST-Link/V2 debugger and programmer while the bottom section of the board is an actual development board. These boards are controlled and powered conveniently through a USB connection to program and efficiently debug the Nucleo-64 board out of the box, with an additional USB cable connected to the USB mini port on the board. Most of the STM32 microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the STM32 Nucleo-64 board with our Click Shield for Nucleo-64, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
Li-Polymer Battery is the ideal solution for devices that demand a dependable and long-lasting power supply while emphasizing mobility. Its compatibility with mikromedia boards ensures easy integration without additional modifications. With a voltage output of 3.7V, the battery meets the standard requirements of many electronic devices. Additionally, boasting a capacity of 2000mAh, it can store a substantial amount of energy, providing sustained power for extended periods. This feature minimizes the need for frequent recharging or replacement. Overall, the Li-Polymer Battery is a reliable and autonomous power source, ideally suited for devices requiring a stable and enduring energy solution.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo 64 with STM32F410RB MCU as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
BATT-MON 5 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.
Example Description
This example demonstrates the use of BATT-MON 5 Click board by reading the battery cell voltage and the relative state of charge (RSOC).
Key functions:
battmon5_cfg_setup- Config Object Initialization function.battmon5_init- Initialization function.battmon5_default_cfg- Click Default Configuration function.battmon5_write_reg- This function writes a data word starting to the selected register by using I2C serial interface.battmon5_read_reg- This function reads a data word from the selected register by using I2C serial interface.battmon5_get_alarm_pin- This function returns the ALARM pin logic state.
Application Init
Initializes the driver and performs the Click default configuration.
Application Task
Reads the battery cell voltage and the relative state of charge (RSOC) and displays the results on the USB UART approximately once per second.
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief BATT-MON 5 Click example
*
* # Description
* This example demonstrates the use of BATT-MON 5 Click board by reading
* the battery cell voltage and the relative state of charge (RSOC).
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and performs the Click default configuration.
*
* ## Application Task
* Reads the battery cell voltage and the relative state of charge (RSOC) and
* displays the results on the USB UART approximately once per second.
*
* @note
* For the communication with the Click board to work, the battery needs to be connected.
* The Click board is configured by default for a 2000 mAh battery pack capacity.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "battmon5.h"
static battmon5_t battmon5;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
battmon5_cfg_t battmon5_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
battmon5_cfg_setup( &battmon5_cfg );
BATTMON5_MAP_MIKROBUS( battmon5_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == battmon5_init( &battmon5, &battmon5_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( BATTMON5_ERROR == battmon5_default_cfg ( &battmon5 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
uint16_t voltage = 0;
uint16_t rsoc = 0;
if ( BATTMON5_OK == battmon5_read_reg ( &battmon5, BATTMON5_REG_CELL_V, &voltage ) )
{
log_printf ( &logger, " Voltage: %u mV\r\n", voltage ); // Battery Cell Voltage
}
if ( BATTMON5_OK == battmon5_read_reg ( &battmon5, BATTMON5_REG_RSOC, &rsoc ) )
{
log_printf ( &logger, " RSOC: %u %%\r\n\n", rsoc ); // Relative State Of Charge
}
Delay_ms ( 1000 );
}
int main ( void )
{
/* Do not remove this line or clock might not be set correctly. */
#ifdef PREINIT_SUPPORTED
preinit();
#endif
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
Additional Support
Resources
Category:Battery charger
