Rohm / BM1383AGLV

BM1383AGLV sensor library

Dependents:   simple-sensor-client rohm-SensorShield-example

BM1383AGLV.cpp@0:d505f3c67a62, 2018-02-03 (annotated)

Committer:
MACRUM
Date:
Sat Feb 03 14:26:39 2018 +0000
Revision:
0:d505f3c67a62
Child:
1:997a1eb76a4f
Initial commit

Who changed what in which revision?

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MACRUM 0:d505f3c67a62 1 /* Copyright (c) 2015 ARM Ltd., MIT License
MACRUM 0:d505f3c67a62 2 *
MACRUM 0:d505f3c67a62 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
MACRUM 0:d505f3c67a62 4 * and associated documentation files (the "Software"), to deal in the Software without
MACRUM 0:d505f3c67a62 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
MACRUM 0:d505f3c67a62 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
MACRUM 0:d505f3c67a62 7 * Software is furnished to do so, subject to the following conditions:
MACRUM 0:d505f3c67a62 8 *
MACRUM 0:d505f3c67a62 9 * The above copyright notice and this permission notice shall be included in all copies or
MACRUM 0:d505f3c67a62 10 * substantial portions of the Software.
MACRUM 0:d505f3c67a62 11 *
MACRUM 0:d505f3c67a62 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
MACRUM 0:d505f3c67a62 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
MACRUM 0:d505f3c67a62 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
MACRUM 0:d505f3c67a62 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
MACRUM 0:d505f3c67a62 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
MACRUM 0:d505f3c67a62 17 *
MACRUM 0:d505f3c67a62 18 *
MACRUM 0:d505f3c67a62 19 * BM1383AGLV Pressure sensor library
MACRUM 0:d505f3c67a62 20 *
MACRUM 0:d505f3c67a62 21 * @author Toyomasa Watarai
MACRUM 0:d505f3c67a62 22 * @version 1.0
MACRUM 0:d505f3c67a62 23 * @date 30-December-2015
MACRUM 0:d505f3c67a62 24 *
MACRUM 0:d505f3c67a62 25 * Library for "BM1383AGLV Pressure sensor library"
MACRUM 0:d505f3c67a62 26 * http://www.rohm.com/web/eu/news-detail?news-title=2014-12-11_ad_pressure&defaultGroupId=false
MACRUM 0:d505f3c67a62 27 *
MACRUM 0:d505f3c67a62 28 */
MACRUM 0:d505f3c67a62 29
MACRUM 0:d505f3c67a62 30 #include "mbed.h"
MACRUM 0:d505f3c67a62 31 #include "BM1383AGLV.h"
MACRUM 0:d505f3c67a62 32
MACRUM 0:d505f3c67a62 33 BM1383AGLV::BM1383AGLV(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
MACRUM 0:d505f3c67a62 34 {
MACRUM 0:d505f3c67a62 35 initialize();
MACRUM 0:d505f3c67a62 36 }
MACRUM 0:d505f3c67a62 37
MACRUM 0:d505f3c67a62 38 BM1383AGLV::BM1383AGLV(I2C &i2c_obj, int addr) : m_i2c(i2c_obj), m_addr(addr)
MACRUM 0:d505f3c67a62 39 {
MACRUM 0:d505f3c67a62 40 initialize();
MACRUM 0:d505f3c67a62 41 }
MACRUM 0:d505f3c67a62 42
MACRUM 0:d505f3c67a62 43 BM1383AGLV::~BM1383AGLV()
MACRUM 0:d505f3c67a62 44 {
MACRUM 0:d505f3c67a62 45 }
MACRUM 0:d505f3c67a62 46
MACRUM 0:d505f3c67a62 47 void BM1383AGLV::initialize()
MACRUM 0:d505f3c67a62 48 {
MACRUM 0:d505f3c67a62 49 unsigned char buf1, buf2;
MACRUM 0:d505f3c67a62 50 unsigned char reg[2];
MACRUM 0:d505f3c67a62 51
MACRUM 0:d505f3c67a62 52 readRegs(BM1383AGLV_ID1, &buf1, sizeof(buf1));
MACRUM 0:d505f3c67a62 53 readRegs(BM1383AGLV_ID2, &buf2, sizeof(buf2));
MACRUM 0:d505f3c67a62 54 if ((buf1 != BM1383AGLV_ID1_VAL) || (buf2 != BM1383AGLV_ID2_VAL)) {
MACRUM 0:d505f3c67a62 55 DEBUG_PRINT("BM1383AGLV initialization error. (%d, %d)\n", buf1, buf2);
MACRUM 0:d505f3c67a62 56 return;
MACRUM 0:d505f3c67a62 57 }
MACRUM 0:d505f3c67a62 58
MACRUM 0:d505f3c67a62 59 reg[0] = BM1383AGLV_POWER_DOWN;
MACRUM 0:d505f3c67a62 60 reg[1] = 0x01;
MACRUM 0:d505f3c67a62 61 writeRegs(reg, 2);
MACRUM 0:d505f3c67a62 62
MACRUM 0:d505f3c67a62 63 wait(1);
MACRUM 0:d505f3c67a62 64
MACRUM 0:d505f3c67a62 65 reg[0] = BM1383AGLV_RESET;
MACRUM 0:d505f3c67a62 66 reg[1] = 0x01;
MACRUM 0:d505f3c67a62 67 writeRegs(reg, 2);
MACRUM 0:d505f3c67a62 68
MACRUM 0:d505f3c67a62 69 reg[0] = BM1383AGLV_MODE_CONTROL;
MACRUM 0:d505f3c67a62 70 reg[1] = 0xC2; // x32, continuous measurement
MACRUM 0:d505f3c67a62 71 writeRegs(reg, 2);
MACRUM 0:d505f3c67a62 72 }
MACRUM 0:d505f3c67a62 73
MACRUM 0:d505f3c67a62 74 float BM1383AGLV::getPressure()
MACRUM 0:d505f3c67a62 75 {
MACRUM 0:d505f3c67a62 76 uint32_t rawPressure;
MACRUM 0:d505f3c67a62 77
MACRUM 0:d505f3c67a62 78 readRegs(BM1383AGLV_PRESSURE_MSB, m_buf, 3);
MACRUM 0:d505f3c67a62 79 rawPressure = (((uint32_t)m_buf[0] << 16) | ((uint32_t)m_buf[1] << 8) | m_buf[2]&0xFC) >> 2;
MACRUM 0:d505f3c67a62 80 return (float)rawPressure / (2048);
MACRUM 0:d505f3c67a62 81 }
MACRUM 0:d505f3c67a62 82
MACRUM 0:d505f3c67a62 83 float BM1383AGLV::getTemperature()
MACRUM 0:d505f3c67a62 84 {
MACRUM 0:d505f3c67a62 85 int32_t rawTemerature;
MACRUM 0:d505f3c67a62 86
MACRUM 0:d505f3c67a62 87 readRegs(BM1383AGLV_TEMPERATURE_MSB, m_buf, 2);
MACRUM 0:d505f3c67a62 88 rawTemerature = ((int32_t)m_buf[0] << 8) | (m_buf[1]);
MACRUM 0:d505f3c67a62 89 return (float)rawTemerature / 32;
MACRUM 0:d505f3c67a62 90 }
MACRUM 0:d505f3c67a62 91
MACRUM 0:d505f3c67a62 92 void BM1383AGLV::readRegs(int addr, uint8_t * data, int len)
MACRUM 0:d505f3c67a62 93 {
MACRUM 0:d505f3c67a62 94 char t[1] = {addr};
MACRUM 0:d505f3c67a62 95 m_i2c.write(m_addr, t, 1, true);
MACRUM 0:d505f3c67a62 96 m_i2c.read(m_addr, (char *)data, len);
MACRUM 0:d505f3c67a62 97 }
MACRUM 0:d505f3c67a62 98
MACRUM 0:d505f3c67a62 99 void BM1383AGLV::writeRegs(uint8_t * data, int len)
MACRUM 0:d505f3c67a62 100 {
MACRUM 0:d505f3c67a62 101 m_i2c.write(m_addr, (char *)data, len);
MACRUM 0:d505f3c67a62 102 }