BM1383AGLV sensor library
Dependents: simple-sensor-client rohm-SensorShield-example
Diff: BM1383AGLV.cpp
- Revision:
- 0:d505f3c67a62
- Child:
- 1:997a1eb76a4f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BM1383AGLV.cpp Sat Feb 03 14:26:39 2018 +0000 @@ -0,0 +1,102 @@ +/* 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); +}