Stepper 14 click

The Stepper 14 Click is a Click board™ that features the DRV8847PWPR, a step motor driver, from Texas Instruments. This Click board™ provides a bipolar step motor controle, It features an H-bridge bipolar step motor driver, which supports full-, half-, quarter-, or eighth-step modes. This click board™ also carries a port expander so that the communication can be done with a minimal number of pins, through the mikroBUS™ I2C bus.

click Product page

Click library

• Author : Stefan Filipovic
• Date : Mar 2024.
• Type : I2C type

Software Support

We provide a library for the Stepper 14 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 Stepper 14 Click driver.

Standard key functions :

• stepper14_cfg_setup Config Object Initialization function.

  void stepper14_cfg_setup ( stepper14_cfg_t *cfg );

• stepper14_init Initialization function.

  err_t stepper14_init ( stepper14_t *ctx, stepper14_cfg_t *cfg );

• stepper14_default_cfg Click Default Configuration function.

  err_t stepper14_default_cfg ( stepper14_t *ctx );

Example key functions :

• stepper14_set_direction This function sets the motor direction to clockwise or counter-clockwise in ctx->direction.

  void stepper14_set_direction ( stepper14_t *ctx, uint8_t dir );

• stepper14_set_step_mode This function sets the step mode resolution settings in ctx->step_mode.

  void stepper14_set_step_mode ( stepper14_t *ctx, uint8_t mode );

• stepper14_drive_motor This function drives the motor for the specific number of steps at the selected speed.

  err_t stepper14_drive_motor ( stepper14_t *ctx, uint32_t steps, uint8_t speed );

Example Description

This example demonstrates the use of the Stepper 14 click board by driving the motor in both directions for a desired number of steps.

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. */
    stepper14_cfg_t stepper14_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.
    stepper14_cfg_setup( &stepper14_cfg );
    STEPPER14_MAP_MIKROBUS( stepper14_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == stepper14_init( &stepper14, &stepper14_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( STEPPER14_ERROR == stepper14_default_cfg ( &stepper14 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Drives the motor clockwise for 200 full steps and then counter-clockwise for 400 half steps with a 2 seconds delay on driving mode change. All data is being logged on the USB UART where you can track the program flow.

void application_task ( void )
{
    log_printf ( &logger, " Move 200 full steps clockwise, speed: medium\r\n\n" );
    stepper14_set_direction ( &stepper14, STEPPER14_DIR_CW );
    stepper14_set_step_mode ( &stepper14, STEPPER14_MODE_FULL_STEP );
    stepper14_drive_motor ( &stepper14, 200, STEPPER14_SPEED_MEDIUM );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf ( &logger, " Move 400 half steps counter-clockwise, speed: fast\r\n\n" );
    stepper14_set_direction ( &stepper14, STEPPER14_DIR_CCW );
    stepper14_set_step_mode ( &stepper14, STEPPER14_MODE_HALF_STEP );
    stepper14_drive_motor ( &stepper14, 400, STEPPER14_SPEED_FAST );
    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.Stepper14

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.