Central Alarm System Architecture and Communication

Revision sheet excerpt

Course Outline

  1. Overall System Architecture
  2. Data Structure and Configuration Table
  3. Detector Initialization
  4. RS485 Communication Protocol
  5. Polling and Alarm Handling Engine
  6. Display LCD Management
  7. Persistent Storage EEPROM
  8. Configuration Interface via UART
  9. Main Program Loop

1. Overall System Architecture

Key Concepts & Definitions

  • Overall System Architecture Diagram: A visual representation of the central alarm system's components and their interactions, illustrating how hardware modules connect and communicate within the system.

  • Components of the Central Alarm System: The main hardware modules that comprise the system, including the central controller, detection devices, display units, and output modules.

  • Hardware Modules and Their Interactions: The physical units such as the STM32 microcontroller, UART/RS485 interface, EEPROM, LCD/OLED display, buzzer/relais, and detectors, along with the communication pathways (e.g., bus RS485) that enable data exchange and control signals among them.

2. Data Structure and Configuration Table

Key Concepts & Definitions

Detector_t structure: A data structure representing each detector, containing fields such as address, type, state, description, zone, zone ID, last seen tick, alarm timestamp, last value, and enabled status. It encapsulates all necessary information for detector management and operation.

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Quiz preview

1. How does the overall system architecture influence the system's effectiveness in detecting alarms?

2. How can the detector configuration table be effectively used during system operation to update detector parameters?

3. During detector initialization, how does the system restore previously saved detector configurations from persistent storage?

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Flashcards preview

Overall System Architecture — purpose?

Visualizes components and their interactions.

Components of central alarm system?

Controller, detectors, display, communication modules.

Hardware modules — interactions?

Modules communicate via RS485 bus and interfaces.

Detector_t structure — role?

Stores detector data: address, type, state, description, timing.

Configuration table — purpose?

Holds all detectors' configs and current statuses.

Detector data fields — examples?

Address, type, state, description, zone, last_seen_tick.

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The revision sheet covers the essential concepts of Central Alarm System Architecture and Communication. It is organized by topic to facilitate learning and memorization, with key definitions, explanations and summaries.

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The quiz contains 9 multiple-choice questions with detailed corrections and explanations for each answer. Ideal for testing your knowledge and identifying gaps.

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