LED Blinking with Watchdog Supervision Project

Project Overview

This project implements a LED blinking system with a watchdog supervision capability, using various software components to manage different hardware drivers and functionalities. The primary goal is to ensure the LED blinks with precise periodicity while being supervised by a watchdog timer to detect and recover from potential system failures.

Components

1. GPIO Management (GPIOMgr)

   • GPIO_Init: Initializes GPIO configuration for the pin controlling the LED.
   • GPIO_Write: Writes a specific value (0 or 1) to the pin to control the LED state.

2. LED Management (LEDMgr)

   • LED_Init: Initializes internal variables of the LED component.
   • LED_Manage: Manages LED blinking actions using the GPIO_Write function, called every 10ms to ensure a 500ms on/off cycle for the LED.

3. Watchdog Driver (WDGDrv)

   • WDGDrv_Init: Configures the watchdog driver with the following features:
     • Sets the maximum timeout value to 50ms.
     • Disables window mode.
     • Enables the early interrupt feature.
     • Activates the watchdog.
   • WDGDrv_IsrNotification: Checks if WDGM_MainFunction is not stuck and if WDGM state is OK to refresh the watchdog timer; otherwise, allows the system to reset.

4. Watchdog Management (WDGM)

   • WDGM_Init: Initializes internal variables of the watchdog management component.
   • WDGM_MainFunction: Periodically called every 20ms to supervise the LEDM entity by checking the number of calls to LEDM_Manage within a 100ms period.
   • WDGM_ProvideSupervisionStatus: Provides the supervision status of the LEDM entity to the WDGDrv.
   • WDGM_AlivenessIndication: Called from LEDM_Manage to confirm timely execution of LEDM_Manage.

5. Timer Drivers

   • Timer1: Generates an interrupt every 1ms.
   • Timer2: Generates an interrupt every 50ms.

6. Other Drivers

   • LED Driver: Controls the LED state.
   • Buzzer Driver: Manages buzzer operations.
   • EXTI Driver: Handles external interrupt configurations.
   • Interrupt Driver: Manages general interrupt handling mechanisms.
   • LCD Driver: Manages operations related to the LCD display.

Project Statement

The project implements an LED blinking capability with watchdog supervision. The LED blinking is handled by two software components: LEDMgr and GPIO. GPIO provides initialization and write functions to control the LED. LEDMgr manages the LED blinking actions, ensuring the LED toggles every 500ms, called from a super loop every 10ms.

Watchdog management is handled by WDGDrv and WDGM. WDGDrv implements a complete driver for the watchdog peripheral, configuring it with a 50ms timeout, early interrupt feature, and activation of the watchdog. It uses the WDGDrv_IsrNotification to refresh the watchdog timer based on the status provided by WDGM.

WDGM provides supervision for the LEDM entity, ensuring it functions correctly within a 100ms period. It initializes internal variables, checks the status of LEDM_MainFunction calls, and provides this status to WDGDrv. WDGM also includes an aliveness indication function to confirm timely execution of LEDM_Manage.

The overall system ensures reliable LED blinking with precise timing, supervised by the watchdog timer to detect and recover from any failures, maintaining system robustness and stability.

Project Scenario

1. Positive Scenario

-that checks the periodicity of the LED Blinking, Call of the LEDM_Manage, Call of the WDGM_MainFunction and refreshment of the WDGDrv.

2. Negative Scenario 1

-that comments the call of the WDGM_MainFunction and checks that the watchdog reset occurred after 50ms.

3. Negative Scenario 2

• that comments the call of the WDGM_AlivenessIndication from the LEDM_Manage while the WDGM_MainFunction is executed periodically and checks that the watchdog reset occurs after 100ms.

4. Negative Scenario 3

-that changes the periodicity of the call of the LEDM_MainFunction to be every 5ms and checks that watchdog reset occurs after 100ms.