Build your BLDC motor driver with DRV8313 and STM32L496AG

A smoother drive starts with us!

Brushless 20 Click with Discovery kit with STM32L496AG MCU

Published Jul 22, 2025

Click board™

Brushless 20 Click

Dev. board

Discovery kit with STM32L496AG MCU

Compiler

NECTO Studio

MCU

STM32L496AG

3-phase motor driver for BLDC motor control, solenoids, or other loads

Hardware Overview

How does it work?

Brushless 20 Click is based on the DRV8313, a fully integrated three-phase BLDC motor driver from Texas Instruments. The highly integrated DRV8313 comes with PWM/enable control interface, a wide voltage operating range, an integrated 10mA LDO, and robust on-chip protection features. Low RDSON and efficient switching algorithms ensure excellent thermal performance and high drive capability. This Click board™ offers an energy-saving solution and quiet motor operation for brushless DC (BLDC) motors used in various applications. Each output driver channel comprises N-channel power MOSFETs configured in a 1/2-H-bridge configuration. Control pins can be accessed through the I2C interface

and the PCA9538A port expander, with which the states of those pins, alongside the state of the output terminals, can be directly controlled. The PCA9538A also allows choosing the least significant bit (LSB) of its I2C slave address by positioning SMD jumpers labeled ADDR SEL to an appropriate position marked as 0 and 1, alongside its interrupt and Reset features routed to the INT and RST pins of the mikroBUS™ socket. The DRV8313 is active unless the SLP pin, routed to the CS pin of the mikroBUS™ socket, is brought to a low logic state. The charge pump and output FETs are disabled in sleep mode alongside the internal LDO regulator. The DRV313 is automatically brought out of sleep mode if SLP is in a logic high state.

This board also supports an external power supply for the motor, which can be connected to the input terminal labeled as VM and should be within the range of 8V to 60V, while the BLDC motor coils can be connected to the terminals labeled as 1, 2, and 3. 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. However, the 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

The 32L496GDISCOVERY Discovery kit serves as a comprehensive demonstration and development platform for the STM32L496AG microcontroller, featuring an Arm® Cortex®-M4 core. Designed for applications that demand a balance of high performance, advanced graphics, and ultra-low power consumption, this kit enables seamless prototyping for a wide range of embedded solutions. With its innovative energy-efficient

architecture, the STM32L496AG integrates extended RAM and the Chrom-ART Accelerator, enhancing graphics performance while maintaining low power consumption. This makes the kit particularly well-suited for applications involving audio processing, graphical user interfaces, and real-time data acquisition, where energy efficiency is a key requirement. For ease of development, the board includes an onboard ST-LINK/V2-1

debugger/programmer, providing a seamless out-of-the-box experience for loading, debugging, and testing applications without requiring additional hardware. The combination of low power features, enhanced memory capabilities, and built-in debugging tools makes the 32L496GDISCOVERY kit an ideal choice for prototyping advanced embedded systems with state-of-the-art energy efficiency.

Discovery kit with STM32L496AG MCU double side image

Microcontroller Overview

MCU Card / MCU

Architecture

ARM Cortex-M4

MCU Memory (KB)

1024

Silicon Vendor

STMicroelectronics

Pin count

169

RAM (Bytes)

327680

You complete me!

Accessories

Brushless DC (BLDC) Motor with a Hall sensor represents a high-performance motor from the 42BLF motor series. This motor, wired in a star configuration, boasts a Hall Effect angle of 120°, ensuring precise and reliable performance. With a compact motor length of 47mm and a lightweight design tipping the scales at just 0.29kg, this BLDC motor is engineered to meet your needs. Operating flawlessly at a voltage rating of 24VDC and a speed range of 4000 ± 10% RPM, this motor offers consistent and dependable power. It excels in a normal operational temperature range from -20 to +50°C, maintaining efficiency with a rated current of 1.9A. Also, this product seamlessly integrates with all Brushless Click boards™ and those that require BLDC motors with Hall sensors.

Used MCU Pins

mikroBUS™ mapper

Reset

PB2

RST

Sleep Mode

PG11

SCK

MISO

MOSI

Power Supply

3.3V

Ground

GND

PWM

Interrupt

PH2

INT

I2C Clock

PB8

SCL

I2C Data

PB7

SDA

Power Supply

Ground

GND

Take a closer look

Click board™ Schematic

Step by step

Project assembly

Discovery kit with STM32H750XB MCU front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Discovery kit with STM32L496AG MCU as your development board.

Thermo 21 Click front image hardware assembly

Thermo 21 Click complete accessories setup image hardware assembly

Board mapper by product7 hardware assembly

Discovery kit with STM32H750XB MCU NECTO MCU Selection Step hardware assembly

Necto No Display image step 8 hardware assembly

Software Support

Library Description

This library contains API for Brushless 20 Click driver.

Key functions:

brushless20_perform_com_sequenceThis function performs a single commutation sequence at a desired speed for the selected rotation direction.
brushless20_drive_motor This function drives the motor for a desired time by performing multiple commutation sequences for the selected rotation direction at a desired speed.
brushless20_get_fault_pin This function returns the fault pin logic state.

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 Brushless 20 Click example
 *
 * # Description
 * This example demonstrates the use of the Brushless 20 Click board by driving the 
 * motor in both directions at different speeds.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes the driver and performs the Click default configuration.
 *
 * ## Application Task
 * Drives the motor in both directions and changes the motor speed every 3 seconds approximately.
 * The current driving direction and speed will be displayed on the USB UART.
 *
 * @author Stefan Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "brushless20.h"

static brushless20_t brushless20;
static log_t logger;

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    brushless20_cfg_t brushless20_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.
    brushless20_cfg_setup( &brushless20_cfg );
    BRUSHLESS20_MAP_MIKROBUS( brushless20_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == brushless20_init( &brushless20, &brushless20_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( BRUSHLESS20_ERROR == brushless20_default_cfg ( &brushless20 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

void application_task ( void ) 
{
    log_printf ( &logger, "\r\n Driving motor clockwise \r\n" );
    for ( uint8_t speed = BRUSHLESS20_SPEED_MIN; speed <= BRUSHLESS20_SPEED_MAX; speed += 20 )
    {
        log_printf ( &logger, " Speed: %u\r\n", ( uint16_t ) speed );
        if ( BRUSHLESS20_OK != brushless20_drive_motor ( &brushless20, BRUSHLESS20_DIR_CW, speed, 3000 ) )
        {
            log_error ( &logger, " Drive motor " );
        }
    }
    Delay_ms ( 1000 );
    log_printf ( &logger, "\r\n Driving motor counter-clockwise \r\n" );
    for ( uint8_t speed = BRUSHLESS20_SPEED_MIN; speed <= BRUSHLESS20_SPEED_MAX; speed += 20 )
    {
        log_printf ( &logger, " Speed: %u\r\n", ( uint16_t ) speed );
        if ( BRUSHLESS20_OK != brushless20_drive_motor ( &brushless20, BRUSHLESS20_DIR_CCW, speed, 3000 ) )
        {
            log_error ( &logger, " Drive motor " );
        }
    }
    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