Main Page

---

DC Motor 9 click

DC Motor 9 Click is a brushed DC motor driver with the current limiting and current sensing. It is based on the DRV8871, an integrated H-Bridge driver IC, optimized for motor driving applications. It can be operated by two logic signals, allowing to drive the connected motor in two different ways: it can use fixed logic levels for the direction control, or it can be controlled by a PWM signal, offering an additional speed control option. The DRV8871 also contains a set of protection features, offering a very high level of reliability. Besides driving capabilities, DC Motor 9 click can also sense current consumption at its output.

click Product page

---

Click library

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

Software Support

We provide a library for the DcMotor9 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 DcMotor9 Click driver.

Standard key functions :

• Config Object Initialization function.

  ‍void dcmotor9_cfg_setup ( dcmotor9_cfg_t *cfg );

  - Initialization function.

  ‍DCMOTOR9_RETVAL dcmotor9_init ( dcmotor9_t *ctx, dcmotor9_cfg_t *cfg );

Example key functions :

• This function read ADC data.

  ‍dcmotor9_data_t dcmotor9_generic_read ( dcmotor9_t *ctx );

  - This function starts PWM module.

  ‍void dcmotor9_pwm_start ( dcmotor9_t *ctx );

• This function sets the PWM duty cycle.

  ‍void dcmotor9_set_duty_cycle ( dcmotor9_t *ctx, float duty_cycle );

  Examples Description

‍DC Motor 9 Click is a brushed DC motor driver with the current limiting and current sensing. It can be operated by two logic signals, allowing to drive the connected motor in two different ways: it can use fixed logic levels for the direction control, or it can be controlled by a PWM signal, offering an additional speed control option.

The demo application is composed of two sections :

Application Init

‍Initializes GPIO, PWM and logger and enables the click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    dcmotor9_cfg_t dcmotor9_cfg;
 
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );
 
    //  Click initialization.
 
    dcmotor9_cfg_setup( &dcmotor9_cfg );
    DCMOTOR9_MAP_MIKROBUS( dcmotor9_cfg, MIKROBUS_1 );
    if ( dcmotor9_init( &dcmotor9, &dcmotor9_cfg ) == PWM_ERROR )
    {
        log_info( &logger, "---- Application Init Error ----" );
        log_info( &logger, "---- Please, run program again ----" );
 
        for ( ; ; );
    }
 
    dcmotor9_set_duty_cycle ( &dcmotor9, DCMOTOR9_PWM_DUTY_PERCENT_0 );
    
    dcmotor9_enable( &dcmotor9 );
    dcmotor9_pwm_start( &dcmotor9 );
    log_info( &logger, "---- Application Task ----" );
    Delay_ms ( 1000 );
}

Application Task

‍ This is a example which demonstrates the use of DC Motor 5 Click board. DC Motor 9 Click controls DC Motor speed via PWM interface. It shows moving in the both directions from slow to fast speed and from fast to slow speed. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void )
{
    static float duty;
    static uint8_t n_cnt;
    
    dcmotor9_clockwise ( &dcmotor9 );
    log_printf( &logger, "> CLOCKWISE <\r\n" );
    dcmotor9_enable ( &dcmotor9 );
    
    for ( n_cnt = 10; n_cnt > 0; n_cnt--  )
    {
        duty = ( float ) n_cnt ;
        duty /= 10;
        dcmotor9_set_duty_cycle( &dcmotor9, duty );
        Delay_ms ( 500 );
    }
    for ( n_cnt = 1; n_cnt <= 10; n_cnt++ )
    {
        duty = ( float ) n_cnt ;
        duty /= 10;
        dcmotor9_set_duty_cycle( &dcmotor9,  duty );
        Delay_ms ( 500 );
    }
    
    log_printf( &logger, "* Pull break *\r\n" );
    dcmotor9_short_brake( &dcmotor9 );
    Delay_ms ( 1000 );
    
    dcmotor9_counter_clockwise ( &dcmotor9 );
    log_printf( &logger, "> COUNTER CLOCKWISE <\r\n" );
        
    for ( n_cnt = 1; n_cnt <= 10; n_cnt++  )
    {
        duty = ( float ) n_cnt ;
        duty /= 10;
        dcmotor9_set_duty_cycle( &dcmotor9, duty );
        Delay_ms ( 500 );
    }
    for ( n_cnt = 10; n_cnt > 0; n_cnt-- )
    {
        duty = ( float ) n_cnt ;
        duty /= 10;
        dcmotor9_set_duty_cycle( &dcmotor9,  duty );
        Delay_ms ( 500 );
    }
    
}

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.DcMotor9

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.

---