Water Level Monitoring and Control System

The Water Level Monitoring and Control System is a Verilog-based design that simulates water level monitoring and control functionality. It includes various features, such as water level visualization, alerts, and dynamic animations. The project emphasizes a modular, hierarchical approach to ensure clarity, scalability, and efficient management of system complexity.

System Overview

The system monitors water levels using switches, displays the water level visually through seven-segment displays and a dual-color dot matrix, and triggers alerts when thresholds are exceeded. Additionally, it incorporates interactive controls for managing water levels and simulating water pump operations.

Design Methodology

This system adopts a Bottom-up Design approach, starting from basic modules and integrating them into higher-level functionalities. The key methodologies include:

• Design Abstraction: Simplifies system complexity through hierarchical levels.
• Modular Design: Encapsulates each function (e.g., timing, water level control, display updates) into independent modules.
• Hierarchical Integration: The top-level module integrates all sub-modules into a cohesive system.

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System Design and Features

Top-Level Module: WaterController

This module oversees overall system behavior by coordinating sub-modules.

Sub-Modules:

1. SwitchInputManager: Processes water level input from SW4~SW0 switches.
2. DisplayController: Manages water level display on DISP2~DISP0 and dot matrix animations.
3. AlertManager: Handles buzzer alarms for warning and danger levels.
4. PumpController: Simulates water pump operation and adjusts speeds based on user input.
5. AnimationManager: Generates animations for water drainage during pump operation.

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Functional Specifications

1. Water Level Input and Thresholds:

   • Water level is determined using SW4~SW0.
     • SW4~SW1: Integer part of the level.
     • SW0: Decimal part of the level.
   • Threshold Levels:
     • Safe Level: 0 to 6 meters (inclusive).
     • Warning Level: 6 to 12 meters (inclusive).
     • Danger Level: Above 12 meters.

2. Seven-Segment Display:

   • Displays the current water level on DISP2~DISP0 to one decimal place.

3. Dot Matrix Visualization:

   • Safe Level (≤6m): Bottom 2 rows are fully green.
   • Warning Level (6–12m):
     • 6–8m: Bottom 3 rows in yellow.
     • 8–10m: Bottom 4 rows in yellow.
     • 10–12m: Bottom 5 rows in yellow.
   • Danger Level (>12m):
     • 12–13m: Bottom 6 rows in red.
     • 13–14m: Bottom 7 rows in red.
     • Above 14m: Entire matrix is red, flashing at 2 Hz.

4. Buzzer Alerts:

   • Activates in Warning and Danger Levels.
   • Pitch increases with water level to indicate rising severity.

5. Water Pump Simulation:

   • Activated by BTN0 during Danger Level.
   • Animates water drainage on the dot matrix display until water level drops to Safe Level.
   • Animation speed is adjustable through BTN7.
     • Displayed on DISP7 as 1 (slow), 2 (medium), or 3 (fast).

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Design Abstraction and Modularity

The system is abstracted at multiple levels:

• System Level: The WaterController module integrates and abstracts sub-modules.
• Functional Level: Each sub-module manages specific tasks, such as display control or input processing.
• Hardware Abstraction: Encapsulates hardware-specific details within sub-modules.

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Development Process

1. Foundational Modules:

   • Timer: Generates timing signals.
   • SwitchInputManager: Handles water level inputs.
   • AlertManager: Implements alarm logic.

2. Intermediate Layers:

   • DisplayController: Manages visualization.
   • PumpController: Simulates water pump functions.

3. Integration:

   • Combine all sub-modules into the WaterController module.
   • Conduct iterative testing for smooth integration.

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Tools and Verification

• Simulation: Validate system functionality before implementation.
• Synthesis: Optimize design for timing constraints and resource efficiency.
• Debugging: Use tools to verify signal integrity and module behavior.

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Conclusion

The Water Level Monitoring and Control System demonstrates a systematic approach to designing a complex digital system. Its modular, hierarchical design ensures maintainability, scalability, and adaptability for future enhancements.