Diff: BM1383GLV.cpp

Revision:

0:b240c59ffaff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BM1383GLV.cpp	Sun Jan 03 15:15:39 2016 +0000
@@ -0,0 +1,101 @@
+/* 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.
+*
+*
+*  BM1383GLV Pressure sensor library
+*
+*  @author  Toyomasa Watarai
+*  @version 1.0
+*  @date    30-December-2015
+*
+*  Library for "BM1383GLV Pressure sensor library"
+*    http://www.rohm.com/web/eu/news-detail?news-title=2014-12-11_ad_pressure&defaultGroupId=false
+*
+*/
+
+#include "mbed.h"
+#include "BM1383GLV.h"
+
+BM1383GLV::BM1383GLV(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
+{
+    initialize();
+}
+
+BM1383GLV::BM1383GLV(I2C &i2c_obj, int addr) : m_i2c(i2c_obj), m_addr(addr)
+{
+    initialize();
+}
+
+BM1383GLV::~BM1383GLV()
+{
+}
+
+void BM1383GLV::initialize()
+{
+    unsigned char buf;
+    unsigned char reg[2];
+
+    readRegs(BM1383GLV_ID, &buf, sizeof(buf));
+    if (buf != BM1383GLV_ID_VAL) {
+        DEBUG_PRINT("BM1383GLV initialization error. (%d)\n", buf);
+        return;
+    }
+
+    reg[0] = BM1383GLV_POWER_DOWN;
+    reg[1] = 0x01;
+    writeRegs(reg, 2);
+    
+    wait(1);
+
+    reg[0] = BM1383GLV_SLEEP;
+    reg[1] = 0x01;
+    writeRegs(reg, 2);
+
+    reg[0] = BM1383GLV_MODE_CONTROL;
+    reg[1] = 0xC4;
+    writeRegs(reg, 2);
+}
+
+float BM1383GLV::getPressure()
+{
+    uint32_t rawPressure;
+
+    readRegs(BM1383GLV_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 BM1383GLV::getTemperature()
+{
+    int32_t rawTemerature;
+    
+    readRegs(BM1383GLV_TEMPERATURE_MSB, m_buf, 2);
+    rawTemerature = ((int32_t)m_buf[0] << 8) | (m_buf[1]);
+    return (float)rawTemerature / 32;
+}
+
+void BM1383GLV::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 BM1383GLV::writeRegs(uint8_t * data, int len)
+{
+    m_i2c.write(m_addr, (char *)data, len);
+}