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, capable of measuring 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, or using user provided communication functions.

Sensor Website: https://www.infineon.com/cms/en/product/sensor/pressure-sensors/pressure-sensors-for-iot/

Quick Start

Follow the steps below to create a simple application which outputs the pressure and temperature data from the sensor to the UART

1. Create an empty application
2. Add this library to the application
3. Add retarget-io library using the Library Manager
4. Place following code in the main.c file.
5. Define I2C SDA and SCL as appropriate for your hardware/shield kit

   #include "cyhal.h"
   #include "cybsp.h"
   #include "cy_retarget_io.h"
   #include "xensiv_dps3xx_mtb.h"
    
   xensiv_dps3xx_t pressure_sensor;
   cyhal_i2c_t i2c;
   cyhal_i2c_cfg_t i2c_cfg = {
       .is_slave = false,
       .address = 0,
       .frequencyhal_hz = 400000
   };
    
   #define DPS_I2C_SDA (?) // Define me
   #define DPS_I2C_SCL (?) // Define me
    
   int main(void)
   {
       cy_rslt_t result;
    
       /* Initialize the device and board peripherals */
       result = cybsp_init();
       CY_ASSERT(result == CY_RSLT_SUCCESS);
    
       __enable_irq();
    
       /* Initialize retarget-io to use the debug UART port */
       result = cy_retarget_io_init(CYBSP_DEBUG_UART_TX, CYBSP_DEBUG_UART_RX, CY_RETARGET_IO_BAUDRATE);
       CY_ASSERT(result == CY_RSLT_SUCCESS);
    
       /* Initialize i2c for pressure sensor */
       result = cyhal_i2c_init(&i2c, DPS_I2C_SDA, DPS_I2C_SCL, NULL);
       CY_ASSERT(result == CY_RSLT_SUCCESS);
       result = cyhal_i2c_configure(&i2c, &i2c_cfg);
       CY_ASSERT(result == CY_RSLT_SUCCESS);
    
       /* Initialize pressure sensor */
       result = xensiv_dps3xx_mtb_init_i2c(&pressure_sensor, &i2c, XENSIV_DPS3XX_I2C_ADDR_DEFAULT);
       CY_ASSERT(result == CY_RSLT_SUCCESS);
    
       for (;;)
       {
           /* Get 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", pressure);
           printf("Temperature: %8f\r\n\r\n", temperature);
    
           cyhal_system_delay_ms(1000);
       }
   }

6. Build the application and program the kit.

More information

• API Reference Guide
• Infineon Technologies
• Infineon GitHub
• ModusToolbox™

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