DC Motor 25 Click

DC Motor 25 Click is a compact add-on board with a brushed DC motor driver. This board features the A3908, a low-voltage bidirectional DC motor driver from Allegro Microsystems. The A3908 is rated for an operating voltage range compatible with mikroBUSâ„¢ power rails and output currents up to 500mA. The unique output full-bridge incorporates source-side linear operation to allow a constant voltage across the motor coil. Logic input pins are provided to control the motor direction of rotation, brake, and standby modes. It also has complete protection capabilities supporting robust and reliable operation.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Mar 2023.
• Type : I2C type

Software Support

We provide a library for the DC Motor 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 LibStockâ„¢ or found on Mikroe github account.

Library Description

This library contains API for DC Motor 25 Click driver.

Standard key functions :

• dcmotor25_cfg_setup Config Object Initialization function.

  void dcmotor25_cfg_setup ( dcmotor25_cfg_t *cfg );

• dcmotor25_init Initialization function.

  err_t dcmotor25_init ( dcmotor25_t *ctx, dcmotor25_cfg_t *cfg );

• dcmotor25_default_cfg Click Default Configuration function.

  err_t dcmotor25_default_cfg ( dcmotor25_t *ctx );

Example key functions :

• dcmotor25_forward DC Motor 25 set forward mode function.

  void dcmotor25_forward ( dcmotor25_t *ctx );

• dcmotor25_reverse DC Motor 25 set reverse mode function.

  void dcmotor25_reverse ( dcmotor25_t *ctx );

• dcmotor25_brake DC Motor 25 set brake mode function.

  void dcmotor25_brake ( dcmotor25_t *ctx );

Example Description

This example demonstrates the use of DC Motor 25 Click boardâ„¢ by driving the DC motor in both directions every 3 seconds.

The demo application is composed of two sections :

Application Init

Initializes the I2C drivernd and performs the Click default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    dcmotor25_cfg_t dcmotor25_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.
    dcmotor25_cfg_setup( &dcmotor25_cfg );
    DCMOTOR25_MAP_MIKROBUS( dcmotor25_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == dcmotor25_init( &dcmotor25, &dcmotor25_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( DCMOTOR25_ERROR == dcmotor25_default_cfg ( &dcmotor25 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
}

Application Task

This example demonstrates the use of the DC Motor 25 Click boardâ„¢. Drives the motors in the forward and reverse direction with a 3 seconds delay with engine braking between direction changes. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{
    log_printf ( &logger, " Forward\r\n" );
    dcmotor25_forward( &dcmotor25 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf ( &logger, " Brake\r\n" );
    dcmotor25_brake( &dcmotor25 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf ( &logger, " Reverse\r\n" );
    dcmotor25_reverse( &dcmotor25 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf ( &logger, " Brake\r\n" );
    dcmotor25_brake( &dcmotor25 );
    Delay_ms ( 1000 );
    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 LibStockâ„¢ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.DCMotor25

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.