pressure9  2.0.0.0
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Pressure 9 click

Pressure 9 click is a digital barometric air pressure sensor Click board™. It is equipped with the DPS422, barometric air pressure sensor, based on a capacitive sensor element.


Click library

  • Author : Jovan Stajkovic
  • Date : nov 2019.
  • Type : I2C/SPI type

Software Support

We provide a library for the Pressure9 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 Pressure9 Click driver.

Standard key functions :

  • Config Object Initialization function.

    void pressure9_cfg_setup ( pressure9_cfg_t *cfg );

  • Initialization function.

    PRESSURE9_RETVAL pressure9_init ( pressure9_t *ctx, pressure9_cfg_t *cfg );

  • Click Default Configuration function.

    void pressure9_default_cfg ( pressure9_t *ctx );

Example key functions :

  • Get Pressure data in mBar

    float pressure9_get_pressure_data ( pressure9_t *ctx );

  • Get Temperature data in C

    float pressure9_get_temperature_data ( pressure9_t *ctx );

  • Writing data to the configuration registers

    void pressure9_configuration ( pressure9_t *ctx, uint8_t reg_adr, uint8_t data_in );

Examples Description

The demo application displays the pressure and temperature measurement using Pressure 9 click.

The demo application is composed of two sections :

Application Init

Initialization driver init, test comunication, software reset, configuration module for measurement and calls the function to update calibration coefficients

  • this function must be called before the measurement starts.
void application_init ( void )
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
PRESSURE9_MAP_MIKROBUS( cfg, MIKROBUS_1 );
pressure9_init( &pressure9, &cfg );
// Test comunication
if ( tmp == PRESSURE9_PRODUCT_ID )
{
log_printf( &logger, "---- Comunication OK!!! ----\r\n" );
}
else
{
log_printf( &logger, "---- Comunication ERROR!!! ----\r\n" );
for ( ; ; );
}
pressure9_default_cfg( &pressure9 );
log_printf( &logger, "---- Start Measurement ----\r\n" );
Delay_ms( 100 );
}

Application Task

Reads Temperature data in [C] and Pressure data in [mBar] and this data logs to the USB UART every 2 sec.

void application_task ( void )
{
pressure = pressure9_get_pressure_data( &pressure9 );
log_printf( &logger, "-- Pressure : %.2f mBar\r\n", pressure );
temperature = pressure9_get_temperature_data( &pressure9 );
log_printf( &logger, "-- Temperature : %.2f °C\r\n", temperature );
log_printf( &logger, "-----------------------------\r\n" );
Delay_ms( 2000 );
}

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.Pressure9

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.


pressure9_init
PRESSURE9_RETVAL pressure9_init(pressure9_t *ctx, pressure9_cfg_t *cfg)
Initialization function.
PRESSURE9_MAP_MIKROBUS
#define PRESSURE9_MAP_MIKROBUS(cfg, mikrobus)
Definition: pressure9.h:53
pressure9_cfg_setup
void pressure9_cfg_setup(pressure9_cfg_t *cfg)
Config Object Initialization function.
PRESSURE9_PRODUCT_ID
#define PRESSURE9_PRODUCT_ID
Definition: pressure9.h:188
PRESSURE9_REG_PRODUCT_ID
#define PRESSURE9_REG_PRODUCT_ID
Definition: pressure9.h:98
application_task
void application_task(void)
Definition: main.c:84
pressure9_get_temperature_data
float pressure9_get_temperature_data(pressure9_t *ctx)
Get Temperature data in C.
application_init
void application_init(void)
Definition: main.c:41
pressure9_generic_read
void pressure9_generic_read(pressure9_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
Generic read function.
pressure9_cfg_t
Click configuration structure definition.
Definition: pressure9.h:309
pressure9_default_cfg
void pressure9_default_cfg(pressure9_t *ctx)
Click Default Configuration function.
pressure9_get_pressure_data
float pressure9_get_pressure_data(pressure9_t *ctx)
Get Pressure data in mBar.