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\mainpage Main Page

Diff pressure click

Diff pressure click carries NXP’s MPXV5010DP signal conditioned, temperature compensated and calibrated pressure sensor with two axial ports to accommodate industrial grade tubing.

click Product page

Click library

  • Author : MikroE Team
  • Date : dec 2019.
  • Type : SPI type

Software Support

We provide a library for the diffpressure 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 diffpressure Click driver.

Standard key functions :

  • Config Object Initialization function.

void diffpressure_cfg_setup ( diffpressure_cfg_t *cfg );

  • Initialization function.

DIFFPRESSURE_RETVAL diffpressure_init ( diffpressure_t *ctx, diffpressure_cfg_t *cfg );

  • Click Default Configuration function.

void diffpressure_default_cfg ( diffpressure_t *ctx );

Example key functions :

  • Generic read data function.

int32_t diffpressure_get_kpa_difference ( diffpressure_t *ctx, int32_t difference );

  • Generic read data function.

int32_t diffpressure_read_data ( diffpressure_t *ctx );

  • Check status of measurement.

status_t diffpressure_status_check ( diffpressure_t *ctx, int32_t result );

Examples Description

This application is temperature compensated and calibrated pressure sensor.

The demo application is composed of two sections :

Application Init

Initialization device. Start sending log via UART.

void application_init ( void )
{
    log_cfg_t log_cfg;
    diffpressure_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 ----" );

    diffpressure_cfg_setup( &cfg );
    DIFFPRESSURE_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    diffpressure_init( &diffpressure, &cfg );
}

Application Task

This is a example which demonstrates the use of Diff Pressure click board. The example is display values of ADC module (MPC3551) 22-bit register and value of difference pressure [ Pa ] via UART.

void application_task ( void )
{
    int32_t difference = 0;
    int32_t adc_value = 0;
    uint8_t difference_txt[ 20 ];
    uint8_t adc_value_txt[ 20 ];
    uint8_t status;

    adc_value = diffpressure_read_data( &diffpressure );
    difference = diffpressure_get_kpa_difference( &diffpressure, adc_value );
    status = diffpressure_status_check( &diffpressure, adc_value );

    if ( status == DIFFPRESSURE_OK )
    {
        log_printf( &logger, "ADC Value:  %d\r\n", adc_value_txt );

        log_printf( &logger, "Difference: &d\r\n", difference_txt );
        
        log_printf( &logger, "  [Pa] \r\n" );

        Delay_ms( 3000 );
    }

    if ( status == DIFFPRESSURE_OVH )
    {
        log_printf( &logger, "Overflow happened" );
        Delay_100ms( );
    }

    if ( status == DIFFPRESSURE_OVL )
    {
        log_printf( &logger, "Underflow happened" );
        Delay_100ms( );
    }

    log_printf( &logger, "" );
}

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.diffpressure

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.