Brushless 25 Click

Brushless 25 Click is a compact add-on board that controls brushless DC (three-phase BLDC) motors with any MCU. This board features the MCT8316A, a high-speed sensorless trapezoidal control integrated FET BLDC driver from Texas Instruments. It provides three individually controllable drivers intended to drive a three-phase BLDC motor, solenoids, or other loads.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Jan 2023.
• Type : I2C/SPI type

Software Support

We provide a library for the Brushless 25 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 25 Click driver.

Standard key functions :

• brushless25_cfg_setup Config Object Initialization function.

  void brushless25_cfg_setup ( brushless25_cfg_t *cfg );

• brushless25_init Initialization function.

  err_t brushless25_init ( brushless25_t *ctx, brushless25_cfg_t *cfg );

• brushless25_default_cfg Click Default Configuration function.

  err_t brushless25_default_cfg ( brushless25_t *ctx );

Example key functions :

• brushless25_register_write Brushless 25 data writing function.

  err_t brushless25_register_write ( brushless25_t *ctx, uint16_t reg, uint32_t data_in );

• brushless25_register_read Brushless 25 data reading function.

  err_t brushless25_register_read ( brushless25_t *ctx, uint16_t reg, uint32_t *data_out );

• brushless25_set_speed_value Brushless 25 set speed function.

  err_t brushless25_set_speed_value ( brushless25_t *ctx, float spd_val );

Example Description

Application example shows the device's capability of controlling the brushless motor speed and state of the driver.

The demo application is composed of two sections :

Application Init

Initializes the driver, sets the device into slow start mode and sets the speed of the motor to 30%.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    brushless25_cfg_t brushless25_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.
    brushless25_cfg_setup( &brushless25_cfg );
    BRUSHLESS25_MAP_MIKROBUS( brushless25_cfg, MIKROBUS_1 );
    err_t init_flag = brushless25_init( &brushless25, &brushless25_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( BRUSHLESS25_ERROR == brushless25_default_cfg ( &brushless25 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    brushless25_set_speed_value( &brushless25, ( speed_val * 10 ) );

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

Application Task

This example is taking track of the state of the driver and motor, as well as its voltage and speed which is changing from 30% to 100%, and logging it onto the USB UART terminal

void application_task ( void )
{
    uint32_t tmp_data = 0;
    uint16_t spd_data = 0;
    uint16_t voltage_data = 0;


    brushless25_register_read( &brushless25, BRUSHLESS25_SYS_STATUS2_REG, &tmp_data );
    tmp_data &= BRUSHLESS25_STATE_MASK; 

    switch ( tmp_data )
    {
        case BRUSHLESS25_STATE_SYSTEM_IDLE:
        {
            log_info( &logger, " System is idle " );
            break;
        }
        case BRUSHLESS25_STATE_MOTOR_START:
        {
            log_info( &logger, " Motor is starting " );
            break;
        }
        case BRUSHLESS25_STATE_MOTOR_RUN:
        {
            log_info( &logger, " Motor is running" );
            if ( ( speed_val < 10 ) && ( sw_data == 0 ) )
            {
                speed_val++;
                if ( speed_val == 10 )
                {
                    sw_data = 1;
                }
            }
            else if ( ( speed_val > 3 ) && ( sw_data == 1 ) )
            {
                speed_val--;
                if ( speed_val == 3 )
                {
                    sw_data = 0;
                }
            }

            break;
        }
        case BRUSHLESS25_STATE_MOTOR_ALIGN:
        {
            log_info( &logger, " Motor is aligning " );
            break;
        }
        case BRUSHLESS25_STATE_MOTOR_IDLE:
        {
            log_info( &logger, " Motor is in idle mode " );
            break;
        }
        case BRUSHLESS25_STATE_MOTOR_STOP:
        {
            log_info( &logger, " Motor is stoped " );
            brushless25_set_brake_state( &brushless25, BRUSHLESS25_BRAKE_ON );
            break;
        }
        case BRUSHLESS25_STATE_FAULT:
        {
            log_error( &logger, " Fault accured " );
            brushless25_set_brake_state( &brushless25, BRUSHLESS25_BRAKE_ON );
            for ( ; ; );
        }
        case BRUSHLESS25_STATE_MOTOR_BRAKE:
        {
            log_info( &logger, " Motor brake is on " );
            brushless25_set_brake_state( &brushless25, BRUSHLESS25_BRAKE_OFF );
            break;
        }
        default:
        {
            break;
        }
    }

    brushless25_set_speed_value( &brushless25, ( speed_val * 10 ) );
    Delay_ms ( 1000 );
    brushless25_register_read( &brushless25, BRUSHLESS25_SYS_STATUS2_REG, &tmp_data );
    spd_data = ( uint16_t ) tmp_data / 10;
    brushless25_register_read( &brushless25, BRUSHLESS25_SYS_STATUS1_REG, &tmp_data );
    voltage_data = ( ( uint16_t ) ( tmp_data >> 16 ) / 10 );

    log_printf( &logger, " Motor speed: %d Hz \r\n", spd_data );
    log_printf( &logger, " Motor voltage: %d V \r\n", voltage_data );
    log_printf( &logger, " --------------------- \r\n" );
    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.Brushless25

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.