BM1383GLV pressure sensor library
Dependents: BM1383GLV_Hello LazuriteGraph_Hello GR-PEACH_IoT_Platform_HTTP_sample
BM1383GLV.cpp
- Committer:
- MACRUM
- Date:
- 2016-03-23
- Revision:
- 1:6e1c9edabeee
- Parent:
- 0:b240c59ffaff
File content as of revision 1:6e1c9edabeee:
/* Copyright (c) 2015 ARM Ltd., MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software * and associated documentation files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * BM1383GLV Pressure sensor library * * @author Toyomasa Watarai * @version 1.0 * @date 30-December-2015 * * Library for "BM1383GLV Pressure sensor library" * http://www.rohm.com/web/eu/news-detail?news-title=2014-12-11_ad_pressure&defaultGroupId=false * */ #include "mbed.h" #include "BM1383GLV.h" BM1383GLV::BM1383GLV(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) { initialize(); } BM1383GLV::BM1383GLV(I2C &i2c_obj, int addr) : m_i2c(i2c_obj), m_addr(addr) { initialize(); } BM1383GLV::~BM1383GLV() { } void BM1383GLV::initialize() { unsigned char buf; unsigned char reg[2]; readRegs(BM1383GLV_ID, &buf, sizeof(buf)); if (buf != BM1383GLV_ID_VAL) { DEBUG_PRINT("BM1383GLV initialization error. (%d)\n", buf); return; } reg[0] = BM1383GLV_POWER_DOWN; reg[1] = 0x01; writeRegs(reg, 2); wait(1); reg[0] = BM1383GLV_SLEEP; reg[1] = 0x01; writeRegs(reg, 2); reg[0] = BM1383GLV_MODE_CONTROL; reg[1] = 0xC4; writeRegs(reg, 2); } float BM1383GLV::getPressure() { uint32_t rawPressure; readRegs(BM1383GLV_PRESSURE_MSB, m_buf, 3); rawPressure = (((uint32_t)m_buf[0] << 16) | ((uint32_t)m_buf[1] << 8) | m_buf[2]&0xFC) >> 2; return (float)rawPressure / (2048); } float BM1383GLV::getTemperature() { int32_t rawTemerature; readRegs(BM1383GLV_TEMPERATURE_MSB, m_buf, 2); rawTemerature = ((int32_t)m_buf[0] << 8) | (m_buf[1]); return (float)rawTemerature / 32; } void BM1383GLV::readRegs(int addr, uint8_t * data, int len) { char t[1] = {addr}; m_i2c.write(m_addr, t, 1, true); m_i2c.read(m_addr, (char *)data, len); } void BM1383GLV::writeRegs(uint8_t * data, int len) { m_i2c.write(m_addr, (char *)data, len); }