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sandeepmistrysandeepmistry
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Initial import (based on MKRENV lib)
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‎README.adoc‎

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= LPS22HB Library for Arduino =
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Allows you to read the pressure sensor of your Nano 33 BLE Sense.
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== License ==
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Copyright (c) 2019 Arduino SA. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

‎examples/ReadPressure/ReadPressure.ino‎

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/*
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LPS22HB - Read Pressure
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This example reads data from the on-board LPS22HB sensor of the
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Nano 33 BLE Sense and prints the pressure sensor value to the
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Serial Monitor once a second.
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The circuit:
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- Arduino Nano 33 BLE Sense
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This example code is in the public domain.
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*/
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#include <Arduino_LPS22HB.h>
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void setup() {
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Serial.begin(9600);
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while (!Serial);
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if (!BARO.begin()) {
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Serial.println("Failed to initialize pressure sensor!");
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while (1);
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}
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}
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void loop() {
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// read the sensor value
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float pressure = BARO.readPressure();
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// print the sensor value
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Serial.print("Pressure = ");
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Serial.print(pressure);
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Serial.println(" kPa");
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// print an empty line
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Serial.println();
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// wait 1 second to print again
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delay(1000);
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}

‎examples/ReadPressureImperial/ReadPressureImperial.ino‎

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/*
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LPS22HB - Read Pressure Imperial
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This example reads data from the on-board LPS22HB sensor of the
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Nano 33 BLE Sense and prints the pressure sensor value in imperial
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units to the Serial Monitor once a second.
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The circuit:
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- Arduino Nano 33 BLE Sense
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This example code is in the public domain.
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*/
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#include <Arduino_LPS22HB.h>
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void setup() {
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Serial.begin(9600);
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while (!Serial);
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if (!BARO.begin()) {
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Serial.println("Failed to initialize pressure sensor!");
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while (1);
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}
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}
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void loop() {
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// Passing PSI to readPressure(...)
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// allows you to read the sensor values in imperial units
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float pressure = BARO.readPressure(PSI);
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// print the sensor value
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Serial.print("Pressure = ");
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Serial.print(pressure);
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Serial.println(" psi");
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// print an empty line
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Serial.println();
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// wait 1 second to print again
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delay(1000);
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}

‎keywords.txt‎

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##########################################
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# Syntax Coloring Map For Arduino_LPS22HB
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##########################################
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# Class
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#######################################
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Arduino_LPS22HB KEYWORD1
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LPS22HB KEYWORD1
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BARO KEYWORD1
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#######################################
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# Methods and Functions
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#######################################
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begin KEYWORD2
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end KEYWORD2
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readPressure KEYWORD2
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#######################################
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# Constants
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#######################################
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PSI LITERAL1
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MILLIBAR LITERAL1
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KILOPASCAL LITERAL1

‎library.properties‎

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name=Arduino_LPS22HB
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version=1.0.0
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author=Arduino
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maintainer=Arduino <[email protected]>
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sentence=Allows you to read the pressure sensor of your Nano 33 BLE Sense.
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paragraph=
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category=Sensors
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url=http://github.com/arduino-libraries/Arduino_LPS22HB
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architectures=*
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includes=Arduino_LPS22HB.h

‎src/Arduino_LPS22HB.h‎

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/*
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This file is part of the Arduino_LPS22HB library.
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Copyright (c) 2019 Arduino SA. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _ARUDINO_LPS22HB_H_
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#define _ARUDINO_LPS22HB_H_
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#include "BARO.h"
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#endif

‎src/BARO.cpp‎

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/*
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This file is part of the Arduino_LPS22HB library.
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Copyright (c) 2019 Arduino SA. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <Wire.h>
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#include "BARO.h"
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#define LPS22HB_ADDRESS 0x5C
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#define LPS22HB_WHO_AM_I_REG 0x0f
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#define LPS22HB_CTRL2_REG 0x11
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#define LPS22HB_STATUS_REG 0x27
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#define LPS22HB_PRESS_OUT_XL_REG 0x28
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#define LPS22HB_PRESS_OUT_L_REG 0x29
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#define LPS22HB_PRESS_OUT_H_REG 0x2a
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LPS22HBClass::LPS22HBClass(TwoWire& wire) :
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_wire(&wire)
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{
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}
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int LPS22HBClass::begin()
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{
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_wire->begin();
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if (i2cRead(LPS22HB_WHO_AM_I_REG) != 0xb1) {
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end();
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return 0;
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}
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return 1;
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}
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void LPS22HBClass::end()
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{
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_wire->end();
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}
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float LPS22HBClass::readPressure(int units)
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{
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// trigger one shot
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i2cWrite(LPS22HB_CTRL2_REG, 0x01);
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// wait for completion
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while ((i2cRead(LPS22HB_STATUS_REG) & 0x02) == 0) {
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yield();
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}
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float reading = (i2cRead(LPS22HB_PRESS_OUT_XL_REG) |
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(i2cRead(LPS22HB_PRESS_OUT_L_REG) << 8) |
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(i2cRead(LPS22HB_PRESS_OUT_H_REG) << 16)) / 40960.0;
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if (units == MILLIBAR) { // 1 kPa = 10 MILLIBAR
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return reading * 10;
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} else if (units == PSI) { // 1 kPa = 0.145038 PSI
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return reading * 0.145038;
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} else {
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return reading;
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}
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}
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int LPS22HBClass::i2cRead(uint8_t reg)
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{
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_wire->beginTransmission(LPS22HB_ADDRESS);
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_wire->write(reg);
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if (_wire->endTransmission(false) != 0) {
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return -1;
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}
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if (_wire->requestFrom(LPS22HB_ADDRESS, 1) != 1) {
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return -1;
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}
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return _wire->read();
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}
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int LPS22HBClass::i2cWrite(uint8_t reg, uint8_t val)
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{
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_wire->beginTransmission(LPS22HB_ADDRESS);
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_wire->write(reg);
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_wire->write(val);
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if (_wire->endTransmission() != 0) {
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return 0;
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}
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return 1;
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}
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LPS22HBClass BARO(Wire1);

‎src/BARO.h‎

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/*
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This file is part of the Arduino_LPS22HB library.
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Copyright (c) 2019 Arduino SA. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _BARO_H_
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#define _BARO_H_
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#include <Arduino.h>
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#include <Wire.h>
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enum {
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PSI,
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MILLIBAR,
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KILOPASCAL
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};
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class LPS22HBClass {
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public:
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LPS22HBClass(TwoWire& wire);
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int begin();
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void end();
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float readPressure(int units = KILOPASCAL);
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private:
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int i2cRead(uint8_t reg);
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int i2cWrite(uint8_t reg, uint8_t val);
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private:
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TwoWire* _wire;
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};
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extern LPS22HBClass BARO;
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#endif

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