Maxim Integrated / Mbed 2 deprecated DeepCover Embedded Security in IoT

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   MaximInterface mbed

MAX44009.cpp@28:e5cdaf13d299, 2017-01-26 (annotated)

Committer:
IanBenzMaxim
Date:
Thu Jan 26 14:18:21 2017 -0600
Revision:
28:e5cdaf13d299
Parent:
15:8cc4cdea59da
Child:
32:0a09505a656d
Migrated the web interface to the mbed 5 networking stack to improve system compatibility.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 1:e1c7c1c636af 1 /*******************************************************************************
IanBenzMaxim 1:e1c7c1c636af 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
IanBenzMaxim 1:e1c7c1c636af 3 *
IanBenzMaxim 1:e1c7c1c636af 4 * Permission is hereby granted, free of charge, to any person obtaining a
IanBenzMaxim 1:e1c7c1c636af 5 * copy of this software and associated documentation files (the "Software"),
IanBenzMaxim 1:e1c7c1c636af 6 * to deal in the Software without restriction, including without limitation
IanBenzMaxim 1:e1c7c1c636af 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
IanBenzMaxim 1:e1c7c1c636af 8 * and/or sell copies of the Software, and to permit persons to whom the
IanBenzMaxim 1:e1c7c1c636af 9 * Software is furnished to do so, subject to the following conditions:
IanBenzMaxim 1:e1c7c1c636af 10 *
IanBenzMaxim 1:e1c7c1c636af 11 * The above copyright notice and this permission notice shall be included
IanBenzMaxim 1:e1c7c1c636af 12 * in all copies or substantial portions of the Software.
IanBenzMaxim 1:e1c7c1c636af 13 *
IanBenzMaxim 1:e1c7c1c636af 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
IanBenzMaxim 1:e1c7c1c636af 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
IanBenzMaxim 1:e1c7c1c636af 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IanBenzMaxim 1:e1c7c1c636af 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
IanBenzMaxim 1:e1c7c1c636af 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
IanBenzMaxim 1:e1c7c1c636af 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
IanBenzMaxim 1:e1c7c1c636af 20 * OTHER DEALINGS IN THE SOFTWARE.
IanBenzMaxim 1:e1c7c1c636af 21 *
IanBenzMaxim 1:e1c7c1c636af 22 * Except as contained in this notice, the name of Maxim Integrated
IanBenzMaxim 1:e1c7c1c636af 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
IanBenzMaxim 1:e1c7c1c636af 24 * Products, Inc. Branding Policy.
IanBenzMaxim 1:e1c7c1c636af 25 *
IanBenzMaxim 1:e1c7c1c636af 26 * The mere transfer of this software does not imply any licenses
IanBenzMaxim 1:e1c7c1c636af 27 * of trade secrets, proprietary technology, copyrights, patents,
IanBenzMaxim 1:e1c7c1c636af 28 * trademarks, maskwork rights, or any other form of intellectual
IanBenzMaxim 1:e1c7c1c636af 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
IanBenzMaxim 1:e1c7c1c636af 30 * ownership rights.
IanBenzMaxim 1:e1c7c1c636af 31 *******************************************************************************
IanBenzMaxim 1:e1c7c1c636af 32 */
IanBenzMaxim 1:e1c7c1c636af 33
IanBenzMaxim 1:e1c7c1c636af 34 #include "MAX44009.hpp"
IanBenzMaxim 6:b6bafd0a7013 35 #include "I2C.h"
IanBenzMaxim 1:e1c7c1c636af 36
IanBenzMaxim 1:e1c7c1c636af 37 static const int I2C_OK = 0;
IanBenzMaxim 1:e1c7c1c636af 38
IanBenzMaxim 6:b6bafd0a7013 39 MAX44009::MAX44009(mbed::I2C & I2C_interface, uint8_t I2C_address)
IanBenzMaxim 1:e1c7c1c636af 40 : m_I2C_interface(I2C_interface), m_I2C_address(I2C_address)
IanBenzMaxim 1:e1c7c1c636af 41 {
IanBenzMaxim 1:e1c7c1c636af 42
IanBenzMaxim 1:e1c7c1c636af 43 }
IanBenzMaxim 1:e1c7c1c636af 44
IanBenzMaxim 1:e1c7c1c636af 45 MAX44009::Result MAX44009::read_current_lux(double & lux) const
IanBenzMaxim 1:e1c7c1c636af 46 {
IanBenzMaxim 15:8cc4cdea59da 47 uint8_t I2C_data, mantissa, exponent;
IanBenzMaxim 1:e1c7c1c636af 48
IanBenzMaxim 1:e1c7c1c636af 49 I2C_data = Lux_High_Byte_Reg;
IanBenzMaxim 15:8cc4cdea59da 50 if (m_I2C_interface.write(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, true) != I2C_OK)
IanBenzMaxim 1:e1c7c1c636af 51 {
IanBenzMaxim 1:e1c7c1c636af 52 m_I2C_interface.stop();
IanBenzMaxim 1:e1c7c1c636af 53 return Hardware_Failure;
IanBenzMaxim 1:e1c7c1c636af 54 }
IanBenzMaxim 15:8cc4cdea59da 55 if (m_I2C_interface.read(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, true) != I2C_OK)
IanBenzMaxim 1:e1c7c1c636af 56 {
IanBenzMaxim 1:e1c7c1c636af 57 m_I2C_interface.stop();
IanBenzMaxim 1:e1c7c1c636af 58 return Hardware_Failure;
IanBenzMaxim 1:e1c7c1c636af 59 }
IanBenzMaxim 1:e1c7c1c636af 60 mantissa = (I2C_data << 4);
IanBenzMaxim 1:e1c7c1c636af 61 exponent = (I2C_data >> 4);
IanBenzMaxim 1:e1c7c1c636af 62
IanBenzMaxim 1:e1c7c1c636af 63 I2C_data = Lux_Low_Byte_Reg;
IanBenzMaxim 15:8cc4cdea59da 64 if (m_I2C_interface.write(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, true) != I2C_OK)
IanBenzMaxim 1:e1c7c1c636af 65 {
IanBenzMaxim 1:e1c7c1c636af 66 m_I2C_interface.stop();
IanBenzMaxim 1:e1c7c1c636af 67 return Hardware_Failure;
IanBenzMaxim 1:e1c7c1c636af 68 }
IanBenzMaxim 15:8cc4cdea59da 69 if (m_I2C_interface.read(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, false) != I2C_OK)
IanBenzMaxim 1:e1c7c1c636af 70 {
IanBenzMaxim 1:e1c7c1c636af 71 m_I2C_interface.stop();
IanBenzMaxim 1:e1c7c1c636af 72 return Hardware_Failure;
IanBenzMaxim 1:e1c7c1c636af 73 }
IanBenzMaxim 1:e1c7c1c636af 74 mantissa |= (I2C_data & 0x0F);
IanBenzMaxim 1:e1c7c1c636af 75
IanBenzMaxim 1:e1c7c1c636af 76 unsigned long calc_result = 1;
IanBenzMaxim 1:e1c7c1c636af 77 if (exponent > 0)
IanBenzMaxim 1:e1c7c1c636af 78 {
IanBenzMaxim 1:e1c7c1c636af 79 calc_result <<= exponent;
IanBenzMaxim 1:e1c7c1c636af 80 }
IanBenzMaxim 1:e1c7c1c636af 81 calc_result *= mantissa;
IanBenzMaxim 1:e1c7c1c636af 82 lux = calc_result * 0.045;
IanBenzMaxim 1:e1c7c1c636af 83
IanBenzMaxim 1:e1c7c1c636af 84 return Success;
IanBenzMaxim 1:e1c7c1c636af 85 }