Maxim Integrated / Mbed 2 deprecated DeepCover Embedded Security in IoT

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: MAX44009.cpp

Revision:
32:0a09505a656d
Parent:
15:8cc4cdea59da
--- a/MAX44009.cpp	Tue Apr 04 14:10:48 2017 -0500
+++ b/MAX44009.cpp	Mon Nov 06 17:34:13 2017 -0600
@@ -28,58 +28,52 @@
 * trademarks, maskwork rights, or any other form of intellectual
 * property whatsoever. Maxim Integrated Products, Inc. retains all
 * ownership rights.
-*******************************************************************************
-*/
+*******************************************************************************/
 
+#include <I2C.h>
 #include "MAX44009.hpp"
-#include "I2C.h"
 
 static const int I2C_OK = 0;
 
 MAX44009::MAX44009(mbed::I2C & I2C_interface, uint8_t I2C_address)
-  : m_I2C_interface(I2C_interface), m_I2C_address(I2C_address)
-{
-  
-}
+    : m_I2C_interface(I2C_interface), m_I2C_address(I2C_address) {}
 
-MAX44009::Result MAX44009::read_current_lux(double & lux) const
-{
+MAX44009::Result MAX44009::read_current_lux(double & lux) const {
   uint8_t I2C_data, mantissa, exponent;
-  
+
   I2C_data = Lux_High_Byte_Reg;
-  if (m_I2C_interface.write(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, true) != I2C_OK)
-  {
+  if (m_I2C_interface.write(m_I2C_address, reinterpret_cast<char *>(&I2C_data),
+                            1, true) != I2C_OK) {
     m_I2C_interface.stop();
     return Hardware_Failure;
   }
-  if (m_I2C_interface.read(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, true) != I2C_OK)
-  {
+  if (m_I2C_interface.read(m_I2C_address, reinterpret_cast<char *>(&I2C_data),
+                           1, true) != I2C_OK) {
     m_I2C_interface.stop();
     return Hardware_Failure;
   }
   mantissa = (I2C_data << 4);
   exponent = (I2C_data >> 4);
-  
+
   I2C_data = Lux_Low_Byte_Reg;
-  if (m_I2C_interface.write(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, true) != I2C_OK)
-  {
+  if (m_I2C_interface.write(m_I2C_address, reinterpret_cast<char *>(&I2C_data),
+                            1, true) != I2C_OK) {
     m_I2C_interface.stop();
     return Hardware_Failure;
   }
-  if (m_I2C_interface.read(m_I2C_address, reinterpret_cast<char *>(&I2C_data), 1, false) != I2C_OK)
-  {
+  if (m_I2C_interface.read(m_I2C_address, reinterpret_cast<char *>(&I2C_data),
+                           1, false) != I2C_OK) {
     m_I2C_interface.stop();
     return Hardware_Failure;
   }
   mantissa |= (I2C_data & 0x0F);
-  
+
   unsigned long calc_result = 1;
-  if (exponent > 0)
-  {
+  if (exponent > 0) {
     calc_result <<= exponent;
   }
   calc_result *= mantissa;
   lux = calc_result * 0.045;
-  
+
   return Success;
 }
\ No newline at end of file