MAXREFDES143#: DeepCover Embedded Security in IoT Authenticated Sensing & Notification
Dependencies: MaximInterface mbed
The MAXREFDES143# is an Internet of Things (IoT) embedded security reference design, built to protect an industrial sensing node by means of authentication and notification to a web server. The hardware includes a peripheral module representing a protected sensor node monitoring operating temperature and remaining life of a filter (simulated through ambient light sensing) and an mbed shield representing a controller node responsible for monitoring one or more sensor nodes. The design is hierarchical with each controller node communicating data from connected sensor nodes to a web server that maintains a centralized log and dispatches notifications as necessary. The mbed shield contains a Wi-Fi module, a DS2465 coprocessor with 1-Wire® master function, an LCD, LEDs, and pushbuttons. The protected sensor node contains a DS28E15 authenticator, a DS7505 temperature sensor, and a MAX44009 light sensor. The mbed shield communicates to a web server by the onboard Wi-Fi module and to the protected sensor node with I2C and 1-Wire. The MAXREFDES143# is equipped with a standard shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The simplicity of this design enables rapid integration into any star-topology IoT network requiring the heightened security with low overhead provided by the SHA-256 symmetric-key algorithm.
More information about the MAXREFDES143# is available on the Maxim Integrated website.
Diff: Display.hpp
- Revision:
- 1:e1c7c1c636af
- Child:
- 6:b6bafd0a7013
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Display.hpp Thu Apr 14 19:48:01 2016 +0000 @@ -0,0 +1,108 @@ +/******************************************************************************* +* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. +* +* 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 MAXIM INTEGRATED 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. +* +* Except as contained in this notice, the name of Maxim Integrated +* Products, Inc. shall not be used except as stated in the Maxim Integrated +* Products, Inc. Branding Policy. +* +* The mere transfer of this software does not imply any licenses +* of trade secrets, proprietary technology, copyrights, patents, +* trademarks, maskwork rights, or any other form of intellectual +* property whatsoever. Maxim Integrated Products, Inc. retains all +* ownership rights. +******************************************************************************* +*/ + +#ifndef _DISPLAY_HPP +#define _DISPLAY_HPP + +#include <cstdint> +#include <string> + +namespace mbed { class I2C; } + +/// Interface to the Newhaven Display NHD-C0220BiZ-FS(RGB)-FBW-3VM LCD module +/// and MAX7306 PWM LED driver for backlight color selection. +class Display +{ +public: + /// Display line referenced from top + enum Line + { + FirstLine = 0, + SecondLine + }; + + /// 24-bit RGB color for the backlight. + struct Color + { + std::uint8_t R, G, B; + Color(std::uint8_t R, std::uint8_t G, std::uint8_t B) + : R(R), G(G), B(B) { } + }; + + /// Length in character os a display line. + static const std::size_t lineLength = 20; + + /// @param I2C_interface A configured I2C interface to use for communication. + /// @param LCD_I2C_address LCD module bus address in mbed format. + /// @param LED_driver_I2C_addr PWM LED driver (MAX7306) bus address in mbed format. + Display(mbed::I2C & I2C_intf, std::uint8_t LCD_I2C_addr, std::uint8_t LED_driver_I2C_addr); + + /// Initialize display components. + void initialize(void); + + /// Clear all display lines. + void clearDisplay(void); + + /// Clear a specific display line. + void clearLine(Line line); + + /// Write a single character to the display at the current cursor position. + void writeCharacter(std::uint8_t character); + + /// Write text to the display at the current cursor position. + void writeText(const std::string & text); + + /// Set cursor to a certain line and zero-index position within the line. + void setCursorPosition(Line line, std::size_t position = 0); + + /// Writes text to the display starting at the beginning of the line. + void writeLine(const std::string & text, Line line); + + /// Writes text to the display starting at the beginning of the line and clears the remainder of the line. + void writeCompleteLine(const std::string & text, Line line); + + // Writes a message to the display with text wrapping allowed at spaces. + void writeMessage(const std::string & text); + + // Set the display backlight to a certain color. + void setBackLightColor(const Color & color); + +private: + mbed::I2C & m_I2C_intf; + std::uint8_t m_LCD_I2C_addr, m_LED_driver_I2C_addr; + + void initializeLCD(void); + void initializeLED_Driver(void); +}; + +#endif