ultralowpress

---

Ultra-Low Press Click

Ultra-Low Press 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.

---

Click Library

• Author : Luka Filipovic
• Date : May 2021.
• Type : I2C type

Software Support

Example Description

This application reads the serial number of the sensor. If there were no errors it continues reading temperature and pressure data from the sensor.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.UltraLowPress

Example Key Functions

• ultralowpress_cfg_setup Config Object Initialization function.

void ultralowpress_cfg_setup ( ultralowpress_cfg_t *cfg );

• ultralowpress_init Initialization function.

err_t ultralowpress_init ( ultralowpress_t *ctx, ultralowpress_cfg_t *cfg );

• ultralowpress_ready_to_read Ready to read.

uint8_t ultralowpress_ready_to_read ( ultralowpress_t *ctx )

• ultralowpress_get_press Read pressure.

float ultralowpress_get_press ( ultralowpress_t *ctx )

• ultralowpress_get_temp Read temperature.

float ultralowpress_get_temp ( ultralowpress_t *ctx )

Application Init

Initializes host communication(UART and I2C). Reads devices serial number and logs it.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    ultralowpress_cfg_t ultralowpress_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.
    ultralowpress_cfg_setup( &ultralowpress_cfg );
    ULTRALOWPRESS_MAP_MIKROBUS( ultralowpress_cfg, MIKROBUS_1 );
    err_t init_flag = ultralowpress_init( &ultralowpress, &ultralowpress_cfg );
    if ( init_flag == I2C_MASTER_ERROR ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    //Serial number of sensor read
    uint16_t temp_read = 0;
    uint32_t serial_read = 0;
    init_flag = ultralowpress_generic_read( &ultralowpress, ULTRALOWPRESS_REG_SERIAL_NUM_H, &temp_read );
    serial_read = temp_read;
    serial_read <<= 16;
    init_flag |= ultralowpress_generic_read( &ultralowpress, ULTRALOWPRESS_REG_SERIAL_NUM_L, &temp_read );
    serial_read |= temp_read;
    
    if ( init_flag < 0 )
    {
        log_error( &logger, " Read" );
        for ( ; ; );
    }
    else
    {
        log_printf( &logger, " > Serial number: 0x%.8LX\r\n", serial_read );
    }
    
    Delay_ms ( 1000 );
    log_info( &logger, " Application Task " );
}

Application Task

Checks if data is available. When it's available it reads the temperature and pressure data from the sensor and logs it.

void application_task ( void ) 
{
    if ( ultralowpress_ready_to_read( &ultralowpress ) )
    {
        ultralowpress_clear_status( &ultralowpress );
        float temp = ultralowpress_get_temp( &ultralowpress );
        float press = ultralowpress_get_press( &ultralowpress );
        log_printf( &logger, " > Temperature[ C ]: %.2f\r\n > Pressure[ Pa ]: %.2f\r\n", temp, press );
    }
    Delay_ms ( 100 );
}

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.

---