Honeywell HumidIcon Digital Humidty/Temperature Sensor.
Dependents: test_HIH6130 testSensor
HIH6130.cpp@5:939573b6796d, 2017-05-16 (annotated)
- Committer:
- Rhyme
- Date:
- Tue May 16 02:34:57 2017 +0000
- Revision:
- 5:939573b6796d
- Parent:
- 4:b5bedc9b6d04
start_CM and start_NOM functions added
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
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 | 4:b5bedc9b6d04 | 27 | void HIH6130::measure(void) |
Rhyme | 4:b5bedc9b6d04 | 28 | { |
Rhyme | 5:939573b6796d | 29 | m_i2c.start() ; |
Rhyme | 4:b5bedc9b6d04 | 30 | m_i2c.write(m_addr) ; |
Rhyme | 4:b5bedc9b6d04 | 31 | m_i2c.stop() ; |
Rhyme | 4:b5bedc9b6d04 | 32 | } |
Rhyme | 4:b5bedc9b6d04 | 33 | |
Rhyme | 5:939573b6796d | 34 | /** |
Rhyme | 5:939573b6796d | 35 | * start Command Mode |
Rhyme | 5:939573b6796d | 36 | * |
Rhyme | 5:939573b6796d | 37 | * @param none |
Rhyme | 5:939573b6796d | 38 | * @returns none |
Rhyme | 5:939573b6796d | 39 | * |
Rhyme | 5:939573b6796d | 40 | * @note this must be called within 3ms or 10ms |
Rhyme | 5:939573b6796d | 41 | * @note after Power On |
Rhyme | 5:939573b6796d | 42 | */ |
Rhyme | 5:939573b6796d | 43 | void HIH6130::start_CM(void) |
Rhyme | 5:939573b6796d | 44 | { |
Rhyme | 5:939573b6796d | 45 | uint8_t data[3] = { 0xA0, 0x00, 0x00 } ; |
Rhyme | 5:939573b6796d | 46 | m_i2c.write(m_addr, (char *)data, 3); |
Rhyme | 5:939573b6796d | 47 | } |
Rhyme | 5:939573b6796d | 48 | |
Rhyme | 5:939573b6796d | 49 | /** |
Rhyme | 5:939573b6796d | 50 | * Ends Command Mode and enter Normal Operation Mode |
Rhyme | 5:939573b6796d | 51 | * |
Rhyme | 5:939573b6796d | 52 | * @param none |
Rhyme | 5:939573b6796d | 53 | * @returns none |
Rhyme | 5:939573b6796d | 54 | * |
Rhyme | 5:939573b6796d | 55 | * @note only valid in Command Mode |
Rhyme | 5:939573b6796d | 56 | */ |
Rhyme | 5:939573b6796d | 57 | void HIH6130::start_NOM(void) |
Rhyme | 5:939573b6796d | 58 | { |
Rhyme | 5:939573b6796d | 59 | uint8_t data[3] = { 0x80, 0x00, 0x00 } ; |
Rhyme | 5:939573b6796d | 60 | m_i2c.write(m_addr, (char *)data, 3); |
Rhyme | 5:939573b6796d | 61 | } |
Rhyme | 5:939573b6796d | 62 | |
Rhyme | 0:8d7f06935726 | 63 | uint16_t HIH6130::getValue(float *humidity, float *temperature) |
Rhyme | 0:8d7f06935726 | 64 | { |
Rhyme | 0:8d7f06935726 | 65 | uint16_t status = 0 ; |
Rhyme | 0:8d7f06935726 | 66 | uint8_t data[4] ; |
Rhyme | 0:8d7f06935726 | 67 | data[0] = 0x00 ; |
Rhyme | 0:8d7f06935726 | 68 | readRegs(0, data, 4) ; |
Rhyme | 0:8d7f06935726 | 69 | |
Rhyme | 0:8d7f06935726 | 70 | status = (data[0] >> 6) & 0x03 ; |
Rhyme | 0:8d7f06935726 | 71 | *humidity = (float)((data[0] & 0x3F) * 256 + data[1]) * 100.0 / (float)0x3FFF ; |
Rhyme | 0:8d7f06935726 | 72 | *temperature = (float)((data[2] * 64) + (data[3] >> 2)) * 165.0 / (float)0x3FFF - 40.0 ; |
Rhyme | 0:8d7f06935726 | 73 | return( status ) ; |
Rhyme | 0:8d7f06935726 | 74 | } |
Rhyme | 0:8d7f06935726 | 75 | |
Rhyme | 0:8d7f06935726 | 76 | void HIH6130::readRegs(int addr, uint8_t * data, int len) { |
Rhyme | 0:8d7f06935726 | 77 | char t[1] = {addr}; |
Rhyme | 0:8d7f06935726 | 78 | m_i2c.write(m_addr, t, 1, true); |
Rhyme | 0:8d7f06935726 | 79 | m_i2c.read(m_addr, (char *)data, len); |
Rhyme | 0:8d7f06935726 | 80 | } |
Rhyme | 0:8d7f06935726 | 81 | |
Rhyme | 0:8d7f06935726 | 82 | void HIH6130::writeRegs(uint8_t * data, int len) { |
Rhyme | 0:8d7f06935726 | 83 | m_i2c.write(m_addr, (char *)data, len); |
Rhyme | 0:8d7f06935726 | 84 | } |