Rohm / BM1383GLV

BM1383GLV pressure sensor library

Dependents:   BM1383GLV_Hello LazuriteGraph_Hello GR-PEACH_IoT_Platform_HTTP_sample

BM1383GLV.cpp@1:6e1c9edabeee, 2016-03-23 (annotated)

Committer:
MACRUM
Date:
Wed Mar 23 03:29:04 2016 +0000
Revision:
1:6e1c9edabeee
Parent:
0:b240c59ffaff 
Fixed default slave address definition

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MACRUM 0:b240c59ffaff 1 /* Copyright (c) 2015 ARM Ltd., MIT License
MACRUM 0:b240c59ffaff 2 *
MACRUM 0:b240c59ffaff 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
MACRUM 0:b240c59ffaff 4 * and associated documentation files (the "Software"), to deal in the Software without
MACRUM 0:b240c59ffaff 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
MACRUM 0:b240c59ffaff 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
MACRUM 0:b240c59ffaff 7 * Software is furnished to do so, subject to the following conditions:
MACRUM 0:b240c59ffaff 8 *
MACRUM 0:b240c59ffaff 9 * The above copyright notice and this permission notice shall be included in all copies or
MACRUM 0:b240c59ffaff 10 * substantial portions of the Software.
MACRUM 0:b240c59ffaff 11 *
MACRUM 0:b240c59ffaff 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
MACRUM 0:b240c59ffaff 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
MACRUM 0:b240c59ffaff 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
MACRUM 0:b240c59ffaff 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
MACRUM 0:b240c59ffaff 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
MACRUM 0:b240c59ffaff 17 *
MACRUM 0:b240c59ffaff 18 *
MACRUM 0:b240c59ffaff 19 * BM1383GLV Pressure sensor library
MACRUM 0:b240c59ffaff 20 *
MACRUM 0:b240c59ffaff 21 * @author Toyomasa Watarai
MACRUM 0:b240c59ffaff 22 * @version 1.0
MACRUM 0:b240c59ffaff 23 * @date 30-December-2015
MACRUM 0:b240c59ffaff 24 *
MACRUM 0:b240c59ffaff 25 * Library for "BM1383GLV Pressure sensor library"
MACRUM 0:b240c59ffaff 26 * http://www.rohm.com/web/eu/news-detail?news-title=2014-12-11_ad_pressure&defaultGroupId=false
MACRUM 0:b240c59ffaff 27 *
MACRUM 0:b240c59ffaff 28 */
MACRUM 0:b240c59ffaff 29
MACRUM 0:b240c59ffaff 30 #include "mbed.h"
MACRUM 0:b240c59ffaff 31 #include "BM1383GLV.h"
MACRUM 0:b240c59ffaff 32
MACRUM 0:b240c59ffaff 33 BM1383GLV::BM1383GLV(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
MACRUM 0:b240c59ffaff 34 {
MACRUM 0:b240c59ffaff 35 initialize();
MACRUM 0:b240c59ffaff 36 }
MACRUM 0:b240c59ffaff 37
MACRUM 0:b240c59ffaff 38 BM1383GLV::BM1383GLV(I2C &i2c_obj, int addr) : m_i2c(i2c_obj), m_addr(addr)
MACRUM 0:b240c59ffaff 39 {
MACRUM 0:b240c59ffaff 40 initialize();
MACRUM 0:b240c59ffaff 41 }
MACRUM 0:b240c59ffaff 42
MACRUM 0:b240c59ffaff 43 BM1383GLV::~BM1383GLV()
MACRUM 0:b240c59ffaff 44 {
MACRUM 0:b240c59ffaff 45 }
MACRUM 0:b240c59ffaff 46
MACRUM 0:b240c59ffaff 47 void BM1383GLV::initialize()
MACRUM 0:b240c59ffaff 48 {
MACRUM 0:b240c59ffaff 49 unsigned char buf;
MACRUM 0:b240c59ffaff 50 unsigned char reg[2];
MACRUM 0:b240c59ffaff 51
MACRUM 0:b240c59ffaff 52 readRegs(BM1383GLV_ID, &buf, sizeof(buf));
MACRUM 0:b240c59ffaff 53 if (buf != BM1383GLV_ID_VAL) {
MACRUM 0:b240c59ffaff 54 DEBUG_PRINT("BM1383GLV initialization error. (%d)\n", buf);
MACRUM 0:b240c59ffaff 55 return;
MACRUM 0:b240c59ffaff 56 }
MACRUM 0:b240c59ffaff 57
MACRUM 0:b240c59ffaff 58 reg[0] = BM1383GLV_POWER_DOWN;
MACRUM 0:b240c59ffaff 59 reg[1] = 0x01;
MACRUM 0:b240c59ffaff 60 writeRegs(reg, 2);
MACRUM 0:b240c59ffaff 61
MACRUM 0:b240c59ffaff 62 wait(1);
MACRUM 0:b240c59ffaff 63
MACRUM 0:b240c59ffaff 64 reg[0] = BM1383GLV_SLEEP;
MACRUM 0:b240c59ffaff 65 reg[1] = 0x01;
MACRUM 0:b240c59ffaff 66 writeRegs(reg, 2);
MACRUM 0:b240c59ffaff 67
MACRUM 0:b240c59ffaff 68 reg[0] = BM1383GLV_MODE_CONTROL;
MACRUM 0:b240c59ffaff 69 reg[1] = 0xC4;
MACRUM 0:b240c59ffaff 70 writeRegs(reg, 2);
MACRUM 0:b240c59ffaff 71 }
MACRUM 0:b240c59ffaff 72
MACRUM 0:b240c59ffaff 73 float BM1383GLV::getPressure()
MACRUM 0:b240c59ffaff 74 {
MACRUM 0:b240c59ffaff 75 uint32_t rawPressure;
MACRUM 0:b240c59ffaff 76
MACRUM 0:b240c59ffaff 77 readRegs(BM1383GLV_PRESSURE_MSB, m_buf, 3);
MACRUM 0:b240c59ffaff 78 rawPressure = (((uint32_t)m_buf[0] << 16) | ((uint32_t)m_buf[1] << 8) | m_buf[2]&0xFC) >> 2;
MACRUM 0:b240c59ffaff 79 return (float)rawPressure / (2048);
MACRUM 0:b240c59ffaff 80 }
MACRUM 0:b240c59ffaff 81
MACRUM 0:b240c59ffaff 82 float BM1383GLV::getTemperature()
MACRUM 0:b240c59ffaff 83 {
MACRUM 0:b240c59ffaff 84 int32_t rawTemerature;
MACRUM 0:b240c59ffaff 85
MACRUM 0:b240c59ffaff 86 readRegs(BM1383GLV_TEMPERATURE_MSB, m_buf, 2);
MACRUM 0:b240c59ffaff 87 rawTemerature = ((int32_t)m_buf[0] << 8) | (m_buf[1]);
MACRUM 0:b240c59ffaff 88 return (float)rawTemerature / 32;
MACRUM 0:b240c59ffaff 89 }
MACRUM 0:b240c59ffaff 90
MACRUM 0:b240c59ffaff 91 void BM1383GLV::readRegs(int addr, uint8_t * data, int len)
MACRUM 0:b240c59ffaff 92 {
MACRUM 0:b240c59ffaff 93 char t[1] = {addr};
MACRUM 0:b240c59ffaff 94 m_i2c.write(m_addr, t, 1, true);
MACRUM 0:b240c59ffaff 95 m_i2c.read(m_addr, (char *)data, len);
MACRUM 0:b240c59ffaff 96 }
MACRUM 0:b240c59ffaff 97
MACRUM 0:b240c59ffaff 98 void BM1383GLV::writeRegs(uint8_t * data, int len)
MACRUM 0:b240c59ffaff 99 {
MACRUM 0:b240c59ffaff 100 m_i2c.write(m_addr, (char *)data, len);
MACRUM 0:b240c59ffaff 101 }