pressure18

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Pressure 18 Click

Pressure 18 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 : Jul 2022.
• Type : I2C/SPI type

Software Support

Example Description

This example demonstrates the use of Pressure 18 Click board by reading and displaying the pressure and temperature measurements.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Pressure18

Example Key Functions

• pressure18_cfg_setup Config Object Initialization function.

void pressure18_cfg_setup ( pressure18_cfg_t *cfg );

• pressure18_init Initialization function.

err_t pressure18_init ( pressure18_t *ctx, pressure18_cfg_t *cfg );

• pressure18_default_cfg Click Default Configuration function.

err_t pressure18_default_cfg ( pressure18_t *ctx );

• pressure18_get_int_pin This function returns the INT pin logic state.

uint8_t pressure18_get_int_pin ( pressure18_t *ctx );

• pressure18_read_data This function reads the sensor measurements data: pressure in Pascals and temperature in Celsius.

err_t pressure18_read_data ( pressure18_t *ctx, float *pressure, float *temperature );

• pressure18_soft_reset This function performs the software reset feature.

err_t pressure18_soft_reset ( pressure18_t *ctx );

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    pressure18_cfg_t pressure18_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.
    pressure18_cfg_setup( &pressure18_cfg );
    PRESSURE18_MAP_MIKROBUS( pressure18_cfg, MIKROBUS_1 );
    err_t init_flag  = pressure18_init( &pressure18, &pressure18_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( PRESSURE18_ERROR == pressure18_default_cfg ( &pressure18 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Waits for the data ready interrupt and then reads the pressure and temperature data and displays them on the USB UART every 320ms approximately.

void application_task ( void )
{
    if ( pressure18_get_int_pin ( &pressure18 ) )
    {
        float pressure, temperature;
        if ( PRESSURE18_OK == pressure18_read_data ( &pressure18, &pressure, &temperature ) )
        {
            log_printf ( &logger, " Pressure: %.1f mBar\r\n", pressure * PRESSURE18_PA_TO_MBAR );
            log_printf ( &logger, " Temperature: %.2f C\r\n\n", temperature );
        }
    }
}

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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