eFuse Click

Fuse Click is a compact add-on board that contains a programmable electronic power breaker. This board features the STPW12, an integrated electronic power breaker optimized to monitor the input power from STMicroelectronics. Connected in series to the power rail, it can disconnect the electronic circuitry on its output if the power consumption overcomes the programmed limit. The intervention of the protection is communicated to the MCU through a signal on the fault pin. The device can also be enabled/disabled through a dedicated Enable pin with a direct PWM mode, which can be achieved through an external PWM signal.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Jun 2021.
• Type : GPIO type

Software Support

We provide a library for the eFuse 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 eFuse Click driver.

Standard key functions :

• efuse_cfg_setup Config Object Initialization function.

  void efuse_cfg_setup ( efuse_cfg_t *cfg );

• efuse_init Initialization function.

  EFUSE_RETVAL efuse_init ( efuse_t *ctx, efuse_cfg_t *cfg );

• efuse_default_cfg Click Default Configuration function.

  void efuse_default_cfg ( efuse_t *ctx );

Example key functions :

• efuse_enable_device eFuse enable the device function.

  void efuse_enable_device ( efuse_t *ctx );

• efuse_disable_device eFuse disable the device function.

  void efuse_disable_device ( efuse_t *ctx );

• efuse_disable_pwm eFuse disable the device function.

  void efuse_disable_pwm ( efuse_t *ctx);

Example Description

This library contains API for the eFuse Click driver. This demo application shows use of a eFuse Click board™.

The demo application is composed of two sections :

Application Init

Initialization of GPIO module and log UART. After driver initialization the app set default settings.

void application_init ( void ) 
{
    log_cfg_t log_cfg;      /**< Logger config object. */
    efuse_cfg_t efuse_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.

    efuse_cfg_setup( &efuse_cfg );
    EFUSE_MAP_MIKROBUS( efuse_cfg, MIKROBUS_1 );
    if ( efuse_init( &efuse, &efuse_cfg ) == DIGITAL_OUT_UNSUPPORTED_PIN ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    efuse_default_cfg ( &efuse );
    Delay_ms ( 100 );

    log_printf( &logger, " Disable PWM \r\n" );
    efuse_disable_pwm( &efuse );
    Delay_ms ( 100 );

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

Application Task

This is an example that shows the use of an eFuse Click board™. The Electronic Fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. The intervention threshold is programmed by the Rs resistor. The device disconnects the load if the power overcomes the pre-set threshold, for example, if Vset = 3.9 kOhm, Vin = 12 V, the intervention threshold is set approximately to 875 mA. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void ) 
{
    log_printf( &logger, "--------------------------\r\n" );
    log_printf( &logger, "\t Active \r\n" );
    efuse_enable_device( &efuse );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, "--------------------------\r\n" );
    log_printf( &logger, "\tInactive \r\n" );
    efuse_disable_device( &efuse );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Note

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.eFuse

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.