XENSIV™ DPS-310/368 pressure sensor

Overview

This library provides functions for interfacing with the XENSIV™ DPS-310/368 barometric pressure sensors. These are miniaturized digital barometric air pressure sensors with ultra-high precision (±2 cm) and a low current consumption, which can measure both pressure and temperature. The pressure sensor element is based on a capacitive sensing principle, which guarantees high precision during temperature changes. This library can be setup to use the ModusToolbox™ HAL interface used on the PSOC™ Edge E84 AI Kit, or using user-provided communication functions.

Pressure sensors for IoT

Quick start

Follow these steps to create a simple application, which outputs the magnetometer data from the sensor to the UART.

1. Create a new application in the ModusToolbox™ and select the appropriate board support package (BSP)
2. Select the PSOC™ Edge MCU: Hello world application and create it
3. Add the sensor-xensiv-dps3xx library to the application

4. Place the following code in the main.c file of the non-secure application of your project (proj_cm33_ns)

   #include "cybsp.h"
   #include "mtb_hal.h"
   #include "retarget_io_init.h"
   #include "mtb_xensiv_dps3xx.h"
    
   cy_stc_scb_i2c_context_t i2c_controller_context;
   mtb_hal_i2c_t CYBSP_I2C_CONTROLLER_hal_obj;
    
   xensiv_dps3xx_t pressure_sensor;
    
   int main(void)
   {
       cy_rslt_t result;
    
       /* Initializes the device and board peripherals. */
       result = cybsp_init();
    
       /* Board initialization failed. Stops program execution. */
       if (CY_RSLT_SUCCESS != result)
       {
           CY_ASSERT(0);
       }
    
       /* Enables global interrupts. */
       __enable_irq();
    
       /* Initializes retarget-io middleware. */
       init_retarget_io();
    
       /* Initializes I2C. */
       result = Cy_SCB_I2C_Init(CYBSP_I2C_CONTROLLER_HW,
                                &CYBSP_I2C_CONTROLLER_config,
                                &i2c_controller_context);
    
       if (CY_RSLT_SUCCESS != result)
       {
           CY_ASSERT(0);
       }
    
       Cy_SCB_I2C_Enable(CYBSP_I2C_CONTROLLER_HW);
    
       /* Configures the I2C master interface with the desired clock frequency. */
       result = mtb_hal_i2c_setup(&CYBSP_I2C_CONTROLLER_hal_obj,
                                  &CYBSP_I2C_CONTROLLER_hal_config,
                                  &i2c_controller_context,
                                  NULL);
    
       if (CY_RSLT_SUCCESS != result)
       {
           CY_ASSERT(0);
       }
    
       /* Initializes pressure sensor. */
       result = mtb_xensiv_dps3xx_init_i2c(&pressure_sensor, &CYBSP_I2C_CONTROLLER_hal_obj,
                                           XENSIV_DPS3XX_I2C_ADDR_DEFAULT);
       if (CY_RSLT_SUCCESS != result)
       {
           CY_ASSERT(0);
       }
    
       for (;;)
       {
           /* Gets the pressure and temperature data and print the results to the UART. */
           float pressure, temperature;
           xensiv_dps3xx_read(&pressure_sensor, &pressure, &temperature);
    
           printf("Pressure   : %8f\r\n", (double)pressure);
           printf("Temperature: %8f\r\n\r\n", (double)temperature);
    
           Cy_SysLib_Delay(1000);
       }
   }

5. Builds the application and program the kit

More information

For more information, see the following documents:

• API reference guide
• ModusToolbox™ software environment, quick start guide, documentation, and videos
• AN235935 – Getting started with PSOC™ Edge MCU on ModusToolbox™ application note
• Infineon Technologies AG

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