Force 3 Click

Force 3 Click is a compact add-on board with circuitry for implementing Force Sensing Resistor into your projects whose resistance changes when a force, pressure, or mechanical stress is applied.

Click Product page

Click library

• Author : MikroE Team
• Date : Jul 2020.
• Type : I2C type

Software Support

We provide a library for the Force3 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 Force3 Click driver.

Standard key functions :

• Config Object Initialization function.

  void force3_cfg_setup ( force3_cfg_t *cfg );

• Initialization function.

  FORCE3_RETVAL force3_init ( force3_t ctx, force3_cfg_t cfg );

Example key functions :

• Read 12bit raw data.

  uint16_t force3_read_raw_data ( force3_t *ctx );

Examples Description

This application demonstrates the use of Force 3 Click board.

The demo application is composed of two sections :

Application Init

Initializes the driver and makes an initial log.

void application_init ( void )
{
    log_cfg_t log_cfg;
    force3_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.

    force3_cfg_setup( &cfg );
    FORCE3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    force3_init( &force3, &cfg );
}

Application Task

Reads the sensor raw data and displays it on the USB UART.

void application_task ( void )
{
    uint16_t raw_data;

    raw_data = force3_read_raw_data( &force3 );
    log_printf( &logger, "Raw data: %d \r\n", raw_data );

    if ( ( raw_data > 5 ) && ( raw_data <= 200 ) )
    {
       log_printf( &logger, ">> Light touch \r\n" );
    }
    else if ( ( raw_data > 200 ) && ( raw_data <= 500 ) )
    {
       log_printf( &logger, ">> Light squeeze \r\n" );
    }
    else if ( ( raw_data > 500 ) && ( raw_data <= 800 ) )
    {
       log_printf( &logger, ">> Medium squeeze \r\n" );
    }
    else if ( raw_data > 800 )
    {
       log_printf( &logger, ">> Big squeeze \r\n" );
    }

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

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.Force3

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.