Hardware Modeling Language (HWML) Guide

Introduction to HWML

The Hardware Modeling Language (HWML) is a framework designed to model the hardware components of a system. It allows users to define deployment nodes, microcontrollers, processors, memory, energy sources, and various sensors. This guide provides a detailed step-by-step process for modeling hardware using HWML.

Step 1: Creating a New HWML Model

1. Open Eclipse and navigate to Project Explorer.
2. Right-click on the model folder.
3. Select New → Other.
4. In the dialog box, search for CAPShwml Model.
5. Click Next, then provide a name for the model (ensure it ends with .capshwml).
6. Click Next again and choose Node Specification.
7. Click Finish to create the HWML model file.

Step 2: Initializing the HWML Diagram

1. Locate the newly created .capshwml file in the Project Explorer.
2. Right-click the file and select Initialize Filesystem Diagram.
3. Enter a name for the diagram or keep the default name.
4. Click Finish to generate the diagram workspace.

Defining Hardware Components

Step 3: Creating a Deployment Node

1. Open the Palette view on the right-hand side of Eclipse.
2. Select the Node element and place it onto the canvas.
3. In the Properties view, set the following attributes:
   • Mac Protocol: ZIGBEE (standard communication protocol)
   • Name: Occupancy Sensor
   • OS: TinyOS (embedded operating system for wireless devices)
   • Routing Protocol: GEAR (Geographical Energy Aware Routing)

Step 4: Adding a Microcontroller

1. From thePalette, select Microcontroller.
2. Place it inside the previously created Node.
3. This represents the microcontroller managing the sensor and data processing.

Step 5: Adding a Processor

1. Select Processor from the Palette.
2. Place it inside the Microcontroller.
3. Set the following attributes in the Properties view:
   • CPI (Clocks Per Instruction): 1.0
   • Frequency: 120 MHz
   • Name: Atmel Atmega328

Step 6: Adding Volatile Memory (RAM)

1. Select Volatile Memory from the Palette.
2. Place it inside the Microcontroller.
3. Set the following properties:
   • Name: RAM
   • Size: 2 KB

Step 7: Adding an Energy Source

1. Select Continuous Energy Source from the Palette.
2. Place it inside the Node.
3. Set the Name to Electricity (indicating a continuous power source).

Step 8: Adding a Sensor

1. Select Occupancy Sensor from the Palette.
2. Place it inside the Node to model the actual occupancy-sensing component.

Final Diagram: