vacuum2

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Vacuum 2 Click

Vacuum 2 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : Stefan Filipovic
• Date : Jan 2025.
• Type : ADC/I2C type

Software Support

Example Description

This example demonstrates the use of the Vacuum 2 Click board. It showcases how to initialize the device, perform zero-pressure offset calibration, and measure pressure in Pascals (Pa).

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Vacuum2

Example Key Functions

• vacuum2_cfg_setup Config Object Initialization function.

  void vacuum2_cfg_setup ( vacuum2_cfg_t *cfg );

• vacuum2_init Initialization function.

  err_t vacuum2_init ( vacuum2_t *ctx, vacuum2_cfg_t *cfg );

• vacuum2_calib_offset This function calibrates the zero current offset value.

  err_t vacuum2_calib_offset ( vacuum2_t *ctx );

• vacuum2_read_vout_avg This function reads a desired number of sensor voltage output samples and averages it.

  err_t vacuum2_read_vout_avg ( vacuum2_t *ctx, uint16_t num_conv, float *vout_avg );

• vacuum2_read_pressure This function reads the pressure measurement.

  err_t vacuum2_read_pressure ( vacuum2_t *ctx, int16_t *pressure );

Application Init

Initializes the logger and the Vacuum 2 Click driver. The application then performs zero-pressure offset calibration to ensure accurate pressure measurements. During the calibration, it is crucial to avoid applying pressure to the sensor.

void application_init ( void )
{
    log_cfg_t log_cfg;  
    vacuum2_cfg_t vacuum2_cfg;  

    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    vacuum2_cfg_setup( &vacuum2_cfg );
    VACUUM2_MAP_MIKROBUS( vacuum2_cfg, MIKROBUS_POSITION_VACUUM2 );
    err_t init_flag = vacuum2_init( &vacuum2, &vacuum2_cfg );
    if ( ( ADC_ERROR == init_flag ) || ( I2C_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_printf( &logger, " Calibrating zero pressure offset in 5 seconds...\r\n" );
    log_printf( &logger, " Make sure no pressure is applied to the sensor during the calibration process.\r\n" );
    for ( uint8_t cnt = 5; cnt > 0; cnt-- )
    {
        log_printf( &logger, " %u\r\n", ( uint16_t ) cnt );
        Delay_ms ( 1000 );
    }
    if ( VACUUM2_ERROR == vacuum2_calib_offset ( &vacuum2 ) )
    {
        log_error( &logger, " Calibrate offset." );
        for ( ; ; );
    }
    log_printf( &logger, " Offset calibration DONE.\r\n\n" );
    
    log_info( &logger, " Application Task " );
}

Application Task

Continuously reads the pressure from the sensor and logs the values in Pascals (Pa).

void application_task ( void )
{
    int16_t pressure = 0;
    if ( VACUUM2_OK == vacuum2_read_pressure ( &vacuum2, &pressure ) ) 
    {
        log_printf( &logger, " Pressure : %d Pa\r\n\n", pressure );
    }
}

Note

The measurable pressure range of the sensor is from -2000 Pa to 2000 Pa.

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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