DC Motor 8 Click

DC Motor 8 Click is a DC motor driver. It can drive simple DC motors with brushes, providing them with a significant amount of current and voltage up to 40V. The Click has one control input, that uses the PWM signal from the host MCU. It uses the half-bridge topology to regulate the speed of the motor rotation, employs advanced dead-time circuitry that monitors the output stage, providing maximum switching efficiency and features an advanced technique to avoid shoot-through currents.

Click Product page

Click library

• Author : Nikola Peric
• Date : Feb 2022.
• Type : PWM type

Software Support

We provide a library for the DcMotor8 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for DcMotor8 Click driver.

Standard key functions :

• Config Object Initialization function.

  void dcmotor8_cfg_setup ( dcmotor8_cfg_t *cfg );

• Initialization function.

  DCMOTOR8_RETVAL dcmotor8_init ( dcmotor8_t ctx, dcmotor8_cfg_t cfg );

Example key functions :

• This function sets the PWM duty cycle.

  void dcmotor8_set_duty_cycle ( dcmotor8_t *ctx, float duty_cycle );

• This function starts PWM module.

  void dcmotor8_pwm_start ( dcmotor8_t *ctx );

• This function stops PWM module.

  void dcmotor8_pwm_stop ( dcmotor8_t *ctx );

Examples Description

This Click can drive simple DC motors with brushes, providing them with a significant amount of current and voltage up to 40V. The Click has one control input, that uses the PWM signal from the host MCU. It uses the half-bridge topology to regulate the speed of the motor rotation, employs advanced dead-time circuitry that monitors the output stage, providing maximum switching efficiency and features an advanced technique to avoid shoot-through currents.

The demo application is composed of two sections :

Application Init

Initializes the driver and enables the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    dcmotor8_cfg_t cfg;

    /** 
     * 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.

    dcmotor8_cfg_setup( &cfg );
    DCMOTOR8_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    dcmotor8_init( &dcmotor8, &cfg );

    dcmotor8_set_duty_cycle ( &dcmotor8, 0.0 );
    dcmotor8_enable ( &dcmotor8, DCMOTOR8_ENABLE );
    dcmotor8_pwm_start( &dcmotor8 );
    log_info( &logger, "---- Application Task ----" );
    Delay_ms ( 500 );
}

Application Task

This is an example that demonstrates the use of DC Motor 8 Click board by increasing and decreasing the motor speed. DC Motor 8 Click communicates with the register via the PWM interface. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void )
{
    static int8_t duty_cnt = 1;
    static int8_t duty_inc = 1;
    float duty = duty_cnt / 10.0;

    dcmotor8_set_duty_cycle ( &dcmotor8, duty );
    log_printf( &logger, "Duty: %d%%\r\n", ( uint16_t )( duty_cnt * 10 ) );
    Delay_ms ( 500 );

    if ( 10 == duty_cnt ) 
    {
        duty_inc = -1;
    }
    else if ( 0 == duty_cnt ) 
    {
        duty_inc = 1;
    }
    duty_cnt += duty_inc;
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.DcMotor8

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.