Honeywell HumidIcon Digital Humidty/Temperature Sensor.
Dependents: test_HIH6130 testSensor
HIH6130.cpp
- Committer:
- Rhyme
- Date:
- 2017-05-16
- Revision:
- 4:b5bedc9b6d04
- Parent:
- 0:8d7f06935726
- Child:
- 5:939573b6796d
File content as of revision 4:b5bedc9b6d04:
/* Copyright (c) 2010-2011 mbed.org, 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. */ #include "HIH6130.h" HIH6130::HIH6130(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) { // activate the peripheral } HIH6130::~HIH6130() { } void HIH6130::measure(void) { m_i2c.write(m_addr) ; m_i2c.stop() ; } uint16_t HIH6130::getValue(float *humidity, float *temperature) { uint16_t status = 0 ; uint8_t data[4] ; data[0] = 0x00 ; readRegs(0, data, 4) ; status = (data[0] >> 6) & 0x03 ; *humidity = (float)((data[0] & 0x3F) * 256 + data[1]) * 100.0 / (float)0x3FFF ; *temperature = (float)((data[2] * 64) + (data[3] >> 2)) * 165.0 / (float)0x3FFF - 40.0 ; return( status ) ; } void HIH6130::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 HIH6130::writeRegs(uint8_t * data, int len) { m_i2c.write(m_addr, (char *)data, len); }