1+ /* !
2+ * @file drvLps28dfw.h
3+ *
4+ * Device driver for a LPS28DFW precision pressure sensor breakout.
5+ *
6+ * Adafruit invests time and resources providing this open source code,
7+ * please support Adafruit and open-source hardware by purchasing
8+ * products from Adafruit!
9+ *
10+ * Copyright (c) Tyeth Gundry 2025 for Adafruit Industries.
11+ *
12+ * MIT license, all text here must be included in any redistribution.
13+ *
14+ */
15+
16+ #ifndef DRV_LPS28DFW_H
17+ #define DRV_LPS28DFW_H
18+
19+ #include " drvBase.h"
20+ #include < Adafruit_LPS28.h>
21+
22+ /* *************************************************************************/
23+ /* !
24+ @brief Class that provides a sensor driver for the LPS28DFW temperature
25+ and pressure sensor.
26+ */
27+ /* *************************************************************************/
28+ class drvLps28dfw : public drvBase {
29+
30+ public:
31+ /* ******************************************************************************/
32+ /* !
33+ @brief Constructor for an LPS28DFW sensor.
34+ @param i2c
35+ The I2C interface.
36+ @param sensorAddress
37+ 7-bit device address.
38+ @param mux_channel
39+ The I2C multiplexer channel.
40+ @param driver_name
41+ The name of the driver.
42+ */
43+ /* ******************************************************************************/
44+ drvLps28dfw (TwoWire *i2c, uint16_t sensorAddress, uint32_t mux_channel,
45+ const char *driver_name)
46+ : drvBase(i2c, sensorAddress, mux_channel, driver_name) {
47+ // Initialization handled by drvBase constructor
48+ }
49+
50+ /* ******************************************************************************/
51+ /* !
52+ @brief Destructor for an LPS28DFW sensor.
53+ */
54+ /* ******************************************************************************/
55+ ~drvLps28dfw () { delete _lps28; }
56+
57+ /* ******************************************************************************/
58+ /* !
59+ @brief Initializes the LPS28DFW sensor and begins I2C.
60+ @returns True if initialized successfully, False otherwise.
61+ */
62+ /* ******************************************************************************/
63+ bool begin () {
64+ _lps28 = new Adafruit_LPS28 ();
65+ // attempt to initialize LPS28DFW
66+ if (!_lps28->begin (_i2c, _address))
67+ return false ;
68+
69+ // Set up sample rate and filter initialization
70+ if (!_lps28->setDataRate (LPS28_ODR_ONESHOT)) {
71+ WS_DEBUG_PRINTLN (" Failed to set data rate"
72+ return false ;
73+ }
74+ if (!_lps28->setAveraging (LPS28_AVG_512)) {
75+ WS_DEBUG_PRINTLN (" Failed to set averaging"
76+ return false ;
77+ }
78+ if (!_lps28->setFullScaleMode (true )) {
79+ WS_DEBUG_PRINTLN (" Failed to set 4060hPa max mode"
80+ return false ;
81+ }
82+
83+ return true ;
84+ }
85+
86+ /* ******************************************************************************/
87+ /* !
88+ @brief Reads the sensor and stores the data in the object.
89+ @returns True if the sensor was read successfully, False otherwise.
90+ */
91+ /* ******************************************************************************/
92+ bool readSensor () {
93+ // grab one reading to seed the sensor
94+ if (!_lps28->triggerOneShot ()) {
95+ return false ;
96+ }
97+
98+ // Wait (block up to 100ms) until data is ready
99+ for (uint8_t i = 0 ; i < 100 ; i++) {
100+ if (_lps28->getStatus () & LPS28_STATUS_PRESS_READY) {
101+ if (_temp == NULL ) {
102+ _temp = _lps28->getTemperatureSensor ();
103+ }
104+ if (_pressure == NULL ) {
105+ _pressure = _lps28->getPressureSensor ();
106+ }
107+ return true ;
108+ }
109+ delay (1 );
110+ }
111+ return false ;
112+ }
113+
114+ /* ******************************************************************************/
115+ /* !
116+ @brief Gets the LPS28DFW's current temperature.
117+ @param tempEvent
118+ Pointer to an Adafruit_Sensor event.
119+ @returns True if the temperature was obtained successfully, False
120+ otherwise.
121+ */
122+ /* ******************************************************************************/
123+ bool getEventAmbientTemp (sensors_event_t *tempEvent) {
124+ if (!readSensor ())
125+ return false ;
126+ _temp->getEvent (tempEvent);
127+ return true ;
128+ }
129+
130+ /* ******************************************************************************/
131+ /* !
132+ @brief Reads a pressure sensor and converts
133+ the reading into the expected SI unit.
134+ @param pressureEvent
135+ Pointer to an Adafruit_Sensor event.
136+ @returns True if the sensor event was obtained successfully, False
137+ otherwise.
138+ */
139+ /* ******************************************************************************/
140+ bool getEventPressure (sensors_event_t *pressureEvent) {
141+ if (!readSensor ())
142+ return false ;
143+ _pressure->getEvent (pressureEvent);
144+ return true ;
145+ }
146+
147+ protected:
148+ Adafruit_LPS28 *_lps28 = nullptr ; // /< LPS28DFW object
149+ Adafruit_Sensor *_temp =
150+ NULL ; // /< Ptr to an adafruit_sensor representing the temperature
151+ Adafruit_Sensor *_pressure =
152+ NULL ; // /< Ptr to an adafruit_sensor representing the pressure
153+ };
154+
155+ #endif // DRV_LPS28DFW_H
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