Honeywell HumidIcon Digital Humidty/Temperature Sensor.
Dependents: test_HIH6130 testSensor
HIH6130.cpp@0:8d7f06935726, 2015-12-13 (annotated)
- Committer:
- Rhyme
- Date:
- Sun Dec 13 08:34:46 2015 +0000
- Revision:
- 0:8d7f06935726
- Child:
- 4:b5bedc9b6d04
First commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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Rhyme | 0:8d7f06935726 | 1 | /* Copyright (c) 2010-2011 mbed.org, MIT License |
Rhyme | 0:8d7f06935726 | 2 | * |
Rhyme | 0:8d7f06935726 | 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
Rhyme | 0:8d7f06935726 | 4 | * and associated documentation files (the "Software"), to deal in the Software without |
Rhyme | 0:8d7f06935726 | 5 | * restriction, including without limitation the rights to use, copy, modify, merge, publish, |
Rhyme | 0:8d7f06935726 | 6 | * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the |
Rhyme | 0:8d7f06935726 | 7 | * Software is furnished to do so, subject to the following conditions: |
Rhyme | 0:8d7f06935726 | 8 | * |
Rhyme | 0:8d7f06935726 | 9 | * The above copyright notice and this permission notice shall be included in all copies or |
Rhyme | 0:8d7f06935726 | 10 | * substantial portions of the Software. |
Rhyme | 0:8d7f06935726 | 11 | * |
Rhyme | 0:8d7f06935726 | 12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
Rhyme | 0:8d7f06935726 | 13 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
Rhyme | 0:8d7f06935726 | 14 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
Rhyme | 0:8d7f06935726 | 15 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
Rhyme | 0:8d7f06935726 | 16 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
Rhyme | 0:8d7f06935726 | 17 | */ |
Rhyme | 0:8d7f06935726 | 18 | |
Rhyme | 0:8d7f06935726 | 19 | #include "HIH6130.h" |
Rhyme | 0:8d7f06935726 | 20 | |
Rhyme | 0:8d7f06935726 | 21 | HIH6130::HIH6130(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) { |
Rhyme | 0:8d7f06935726 | 22 | // activate the peripheral |
Rhyme | 0:8d7f06935726 | 23 | } |
Rhyme | 0:8d7f06935726 | 24 | |
Rhyme | 0:8d7f06935726 | 25 | HIH6130::~HIH6130() { } |
Rhyme | 0:8d7f06935726 | 26 | |
Rhyme | 0:8d7f06935726 | 27 | uint16_t HIH6130::getValue(float *humidity, float *temperature) |
Rhyme | 0:8d7f06935726 | 28 | { |
Rhyme | 0:8d7f06935726 | 29 | uint16_t status = 0 ; |
Rhyme | 0:8d7f06935726 | 30 | uint8_t data[4] ; |
Rhyme | 0:8d7f06935726 | 31 | data[0] = 0x00 ; |
Rhyme | 0:8d7f06935726 | 32 | readRegs(0, data, 4) ; |
Rhyme | 0:8d7f06935726 | 33 | |
Rhyme | 0:8d7f06935726 | 34 | status = (data[0] >> 6) & 0x03 ; |
Rhyme | 0:8d7f06935726 | 35 | *humidity = (float)((data[0] & 0x3F) * 256 + data[1]) * 100.0 / (float)0x3FFF ; |
Rhyme | 0:8d7f06935726 | 36 | *temperature = (float)((data[2] * 64) + (data[3] >> 2)) * 165.0 / (float)0x3FFF - 40.0 ; |
Rhyme | 0:8d7f06935726 | 37 | return( status ) ; |
Rhyme | 0:8d7f06935726 | 38 | } |
Rhyme | 0:8d7f06935726 | 39 | |
Rhyme | 0:8d7f06935726 | 40 | void HIH6130::readRegs(int addr, uint8_t * data, int len) { |
Rhyme | 0:8d7f06935726 | 41 | char t[1] = {addr}; |
Rhyme | 0:8d7f06935726 | 42 | m_i2c.write(m_addr, t, 1, true); |
Rhyme | 0:8d7f06935726 | 43 | m_i2c.read(m_addr, (char *)data, len); |
Rhyme | 0:8d7f06935726 | 44 | } |
Rhyme | 0:8d7f06935726 | 45 | |
Rhyme | 0:8d7f06935726 | 46 | void HIH6130::writeRegs(uint8_t * data, int len) { |
Rhyme | 0:8d7f06935726 | 47 | m_i2c.write(m_addr, (char *)data, len); |
Rhyme | 0:8d7f06935726 | 48 | } |