Brushless 11 Click

Brushless 11 Click is a compact add-on board that controls brushless DC motors with any MCU. This board features the A4931, a 3-phase brushless DC motor pre-driver from Allegro Microsystems. It drives six onboard N-channel power MOSFETs and supplies the motor with 8V up to 30V voltages. This pre-driver offers enable, direction, and brake inputs that can control motor functions and logic outputs for measuring motor rotation.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Aug 2023.
• Type : PWM type

Software Support

We provide a library for the Brushless 11 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Brushless 11 Click driver.

Standard key functions :

• brushless11_cfg_setup Config Object Initialization function.

  void brushless11_cfg_setup ( brushless11_cfg_t *cfg );

• brushless11_init Initialization function.

  err_t brushless11_init ( brushless11_t *ctx, brushless11_cfg_t *cfg );

• brushless11_default_cfg Click Default Configuration function.

  err_t brushless11_default_cfg ( brushless11_t *ctx );

Example key functions :

• brushless11_get_fg1_pin Brushless 11 get FG1 pin state function.

  uint8_t brushless11_get_fg1_pin ( brushless11_t *ctx );

• brushless11_set_brake Brushless 11 set motor brake state function.

  void brushless11_set_brake ( brushless11_t *ctx, uint8_t brake_state );

• brushless11_set_speed Brushless 11 set motor speed.

  err_t brushless11_set_speed ( brushless11_t *ctx, uint8_t speed );

Example Description

This example demonstrates the use of the Brushless 11 Click board by driving the motor at different speeds.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    brushless11_cfg_t brushless11_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.
    brushless11_cfg_setup( &brushless11_cfg );
    BRUSHLESS11_MAP_MIKROBUS( brushless11_cfg, MIKROBUS_1 );
    if ( PWM_ERROR == brushless11_init( &brushless11, &brushless11_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( BRUSHLESS11_ERROR == brushless11_default_cfg ( &brushless11 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Controls the motor speed by changing the PWM duty cycle every second. The duty cycle ranges from 10% to 100%. Each step will be logged on the USB UART where you can track the program flow.

void application_task ( void ) 
{
    log_printf( &logger, " Motor brake is off \r\n" );
    brushless11_set_brake( &brushless11, BRUSHLESS11_BRAKE_OFF );
    for ( uint8_t speed_cnt = 10; speed_cnt <= 100; speed_cnt += 10 )
    {
        brushless11_set_speed( &brushless11, speed_cnt );
        log_printf( &logger, " Speed is: %d%% \r\n", ( uint16_t ) speed_cnt );
        Delay_ms ( 1000 );
    }
    log_printf( &logger, " Motor brake is on \r\n" );
    brushless11_set_brake( &brushless11, BRUSHLESS11_BRAKE_ON );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Brushless11

Additional notes and informations

Depending on the development board you are using, you may need USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.