BM1383AGLV sensor library
Dependents: simple-sensor-client rohm-SensorShield-example
BM1383AGLV.cpp
- Committer:
- MACRUM
- Date:
- 2018-02-03
- Revision:
- 0:d505f3c67a62
- Child:
- 1:997a1eb76a4f
File content as of revision 0:d505f3c67a62:
/* 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. * * * BM1383AGLV Pressure sensor library * * @author Toyomasa Watarai * @version 1.0 * @date 30-December-2015 * * Library for "BM1383AGLV Pressure sensor library" * http://www.rohm.com/web/eu/news-detail?news-title=2014-12-11_ad_pressure&defaultGroupId=false * */ #include "mbed.h" #include "BM1383AGLV.h" BM1383AGLV::BM1383AGLV(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) { initialize(); } BM1383AGLV::BM1383AGLV(I2C &i2c_obj, int addr) : m_i2c(i2c_obj), m_addr(addr) { initialize(); } BM1383AGLV::~BM1383AGLV() { } void BM1383AGLV::initialize() { unsigned char buf1, buf2; unsigned char reg[2]; readRegs(BM1383AGLV_ID1, &buf1, sizeof(buf1)); readRegs(BM1383AGLV_ID2, &buf2, sizeof(buf2)); if ((buf1 != BM1383AGLV_ID1_VAL) || (buf2 != BM1383AGLV_ID2_VAL)) { DEBUG_PRINT("BM1383AGLV initialization error. (%d, %d)\n", buf1, buf2); return; } reg[0] = BM1383AGLV_POWER_DOWN; reg[1] = 0x01; writeRegs(reg, 2); wait(1); reg[0] = BM1383AGLV_RESET; reg[1] = 0x01; writeRegs(reg, 2); reg[0] = BM1383AGLV_MODE_CONTROL; reg[1] = 0xC2; // x32, continuous measurement writeRegs(reg, 2); } float BM1383AGLV::getPressure() { uint32_t rawPressure; readRegs(BM1383AGLV_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 BM1383AGLV::getTemperature() { int32_t rawTemerature; readRegs(BM1383AGLV_TEMPERATURE_MSB, m_buf, 2); rawTemerature = ((int32_t)m_buf[0] << 8) | (m_buf[1]); return (float)rawTemerature / 32; } void BM1383AGLV::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 BM1383AGLV::writeRegs(uint8_t * data, int len) { m_i2c.write(m_addr, (char *)data, len); }