Rohm / BM1383AGLV

BM1383AGLV sensor library

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

BM1383AGLV.cpp@1:997a1eb76a4f, 2020-11-20 (annotated)

Committer:
MACRUM
Date:
Fri Nov 20 14:55:11 2020 +0000
Revision:
1:997a1eb76a4f
Parent:
0:d505f3c67a62 
Add ready-status check

Who changed what in which revision?

UserRevisionLine numberNew contents of line
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 1:997a1eb76a4f 33 BM1383AGLV::BM1383AGLV(PinName sda, PinName scl, int addr)
MACRUM 1:997a1eb76a4f 34 :
MACRUM 1:997a1eb76a4f 35 i2c_p(new I2C(sda, scl)),
MACRUM 1:997a1eb76a4f 36 i2c(*i2c_p),
MACRUM 1:997a1eb76a4f 37 m_addr(addr)
MACRUM 0:d505f3c67a62 38 {
MACRUM 0:d505f3c67a62 39 initialize();
MACRUM 0:d505f3c67a62 40 }
MACRUM 0:d505f3c67a62 41
MACRUM 1:997a1eb76a4f 42 BM1383AGLV::BM1383AGLV(I2C &i2c_obj, int addr)
MACRUM 1:997a1eb76a4f 43 :
MACRUM 1:997a1eb76a4f 44 i2c_p(NULL),
MACRUM 1:997a1eb76a4f 45 i2c(i2c_obj),
MACRUM 1:997a1eb76a4f 46 m_addr(addr)
MACRUM 0:d505f3c67a62 47 {
MACRUM 0:d505f3c67a62 48 initialize();
MACRUM 0:d505f3c67a62 49 }
MACRUM 0:d505f3c67a62 50
MACRUM 0:d505f3c67a62 51 BM1383AGLV::~BM1383AGLV()
MACRUM 0:d505f3c67a62 52 {
MACRUM 1:997a1eb76a4f 53 if (NULL != i2c_p)
MACRUM 1:997a1eb76a4f 54 delete i2c_p;
MACRUM 0:d505f3c67a62 55 }
MACRUM 0:d505f3c67a62 56
MACRUM 0:d505f3c67a62 57 void BM1383AGLV::initialize()
MACRUM 0:d505f3c67a62 58 {
MACRUM 0:d505f3c67a62 59 unsigned char buf1, buf2;
MACRUM 0:d505f3c67a62 60 unsigned char reg[2];
MACRUM 0:d505f3c67a62 61
MACRUM 0:d505f3c67a62 62 readRegs(BM1383AGLV_ID1, &buf1, sizeof(buf1));
MACRUM 0:d505f3c67a62 63 readRegs(BM1383AGLV_ID2, &buf2, sizeof(buf2));
MACRUM 0:d505f3c67a62 64 if ((buf1 != BM1383AGLV_ID1_VAL) || (buf2 != BM1383AGLV_ID2_VAL)) {
MACRUM 0:d505f3c67a62 65 DEBUG_PRINT("BM1383AGLV initialization error. (%d, %d)\n", buf1, buf2);
MACRUM 0:d505f3c67a62 66 return;
MACRUM 0:d505f3c67a62 67 }
MACRUM 0:d505f3c67a62 68
MACRUM 0:d505f3c67a62 69 reg[0] = BM1383AGLV_POWER_DOWN;
MACRUM 0:d505f3c67a62 70 reg[1] = 0x01;
MACRUM 0:d505f3c67a62 71 writeRegs(reg, 2);
MACRUM 0:d505f3c67a62 72
MACRUM 0:d505f3c67a62 73 wait(1);
MACRUM 0:d505f3c67a62 74
MACRUM 0:d505f3c67a62 75 reg[0] = BM1383AGLV_RESET;
MACRUM 0:d505f3c67a62 76 reg[1] = 0x01;
MACRUM 0:d505f3c67a62 77 writeRegs(reg, 2);
MACRUM 0:d505f3c67a62 78
MACRUM 0:d505f3c67a62 79 reg[0] = BM1383AGLV_MODE_CONTROL;
MACRUM 0:d505f3c67a62 80 reg[1] = 0xC2; // x32, continuous measurement
MACRUM 0:d505f3c67a62 81 writeRegs(reg, 2);
MACRUM 0:d505f3c67a62 82 }
MACRUM 0:d505f3c67a62 83
MACRUM 0:d505f3c67a62 84 float BM1383AGLV::getPressure()
MACRUM 0:d505f3c67a62 85 {
MACRUM 0:d505f3c67a62 86 uint32_t rawPressure;
MACRUM 0:d505f3c67a62 87
MACRUM 1:997a1eb76a4f 88 #if BM1383AGLV_WAIT_READY_STATUS
MACRUM 1:997a1eb76a4f 89 uint8_t ready_status = 0;
MACRUM 1:997a1eb76a4f 90 do {
MACRUM 1:997a1eb76a4f 91 wait_ms(6);
MACRUM 1:997a1eb76a4f 92 readRegs(BM1383AGLV_STATUS, &ready_status, 1);
MACRUM 1:997a1eb76a4f 93 } while(ready_status == 0);
MACRUM 1:997a1eb76a4f 94 #else
MACRUM 1:997a1eb76a4f 95 wait_ms(6);
MACRUM 1:997a1eb76a4f 96 #endif
MACRUM 0:d505f3c67a62 97 readRegs(BM1383AGLV_PRESSURE_MSB, m_buf, 3);
MACRUM 0:d505f3c67a62 98 rawPressure = (((uint32_t)m_buf[0] << 16) | ((uint32_t)m_buf[1] << 8) | m_buf[2]&0xFC) >> 2;
MACRUM 0:d505f3c67a62 99 return (float)rawPressure / (2048);
MACRUM 0:d505f3c67a62 100 }
MACRUM 0:d505f3c67a62 101
MACRUM 0:d505f3c67a62 102 float BM1383AGLV::getTemperature()
MACRUM 0:d505f3c67a62 103 {
MACRUM 0:d505f3c67a62 104 int32_t rawTemerature;
MACRUM 0:d505f3c67a62 105
MACRUM 1:997a1eb76a4f 106 #if BM1383AGLV_WAIT_READY_STATUS
MACRUM 1:997a1eb76a4f 107 uint8_t ready_status = 0;
MACRUM 1:997a1eb76a4f 108 do {
MACRUM 1:997a1eb76a4f 109 wait_ms(6);
MACRUM 1:997a1eb76a4f 110 readRegs(BM1383AGLV_STATUS, &ready_status, 1);
MACRUM 1:997a1eb76a4f 111 } while(ready_status == 0);
MACRUM 1:997a1eb76a4f 112 #else
MACRUM 1:997a1eb76a4f 113 wait_ms(6);
MACRUM 1:997a1eb76a4f 114 #endif
MACRUM 0:d505f3c67a62 115 readRegs(BM1383AGLV_TEMPERATURE_MSB, m_buf, 2);
MACRUM 0:d505f3c67a62 116 rawTemerature = ((int32_t)m_buf[0] << 8) | (m_buf[1]);
MACRUM 0:d505f3c67a62 117 return (float)rawTemerature / 32;
MACRUM 0:d505f3c67a62 118 }
MACRUM 0:d505f3c67a62 119
MACRUM 0:d505f3c67a62 120 void BM1383AGLV::readRegs(int addr, uint8_t * data, int len)
MACRUM 0:d505f3c67a62 121 {
MACRUM 0:d505f3c67a62 122 char t[1] = {addr};
MACRUM 1:997a1eb76a4f 123 i2c.write(m_addr, t, 1, true);
MACRUM 1:997a1eb76a4f 124 i2c.read(m_addr, (char *)data, len);
MACRUM 0:d505f3c67a62 125 }
MACRUM 0:d505f3c67a62 126
MACRUM 0:d505f3c67a62 127 void BM1383AGLV::writeRegs(uint8_t * data, int len)
MACRUM 0:d505f3c67a62 128 {
MACRUM 1:997a1eb76a4f 129 i2c.write(m_addr, (char *)data, len);
MACRUM 0:d505f3c67a62 130 }