Pressure 17 Click

Pressure 17 Click is a compact add-on board that contains a board-mount pressure sensor. This board features the BM1390GLV-Z, a high-precision piezoresistive pressure sensor from Rohm Semiconductor. The BM1390GLV-Z comes with a configurable host interface that supports I2C serial communication and measures pressure in a range from 300hPa up to 1300hPa with an accuracy of ±1hPa.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Dec 2021.
• Type : I2C type

Software Support

We provide a library for the Pressure 17 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 Pressure 17 Click driver.

Standard key functions :

• pressure17_cfg_setup Config Object Initialization function.

  void pressure17_cfg_setup ( pressure17_cfg_t *cfg );

• pressure17_init Initialization function.

  err_t pressure17_init ( pressure17_t *ctx, pressure17_cfg_t *cfg );

• pressure17_default_cfg Click Default Configuration function.

  err_t pressure17_default_cfg ( pressure17_t *ctx );

Example key functions :

• pressure17_get_int_pin This function returns the INT pin logic state.

  uint8_t pressure17_get_int_pin ( pressure17_t *ctx );

• pressure17_read_data This function checks if the data is ready and then reads the pressure and temperature raw data and converts them to millibar and Celsius respectfully.

  err_t pressure17_read_data ( pressure17_t *ctx, float *pressure, float *temperature );

• pressure17_write_register This function writes a data byte to the selected register by using I2C serial interface.

  err_t pressure17_write_register ( pressure17_t *ctx, uint8_t reg, uint8_t data_in );

Example Description

This example demonstrates the use of Pressure 17 Click board by reading and displaying the pressure and temperature data.

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. */
    pressure17_cfg_t pressure17_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.
    pressure17_cfg_setup( &pressure17_cfg );
    PRESSURE17_MAP_MIKROBUS( pressure17_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == pressure17_init( &pressure17, &pressure17_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( PRESSURE17_ERROR == pressure17_default_cfg ( &pressure17 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Waits for the data ready interrupt and then reads the pressure [mbar] and temperature [C] data and displays the results on the USB UART approximately every 200ms.

void application_task ( void )
{
    if ( !pressure17_get_int_pin ( &pressure17 ) )
    {
        float pressure, temperature;
        if ( PRESSURE17_OK == pressure17_read_data ( &pressure17, &pressure, &temperature ) )
        {
            log_printf ( &logger, " Pressure: %.2f mbar\r\n Temperature: %.2f C\r\n\n", pressure, temperature );
        }
    }
}

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.Pressure17

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.