Memory-Stack/main.c at main · ciopialex/Memory-Stack · GitHub

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/*******************************************************************************
**  File: main.c
**  Description: Demo Entry Point - Simulates ECU Lifecycle
**
**  ELI5: This is the "car turning on and off" simulator.
**        It runs through: START → DRIVE → SHUTDOWN
**
**  ELI25: Simulates ECU lifecycle per Mihai Suciu's slides:
**         1. STARTUP: Initialize all modules, call NvM_ReadAll
**         2. NORMAL:  Cyclic MainFunction calls
**         3. SHUTDOWN: Call NvM_WriteAll, cleanup
*******************************************************************************/

#include <stdio.h>
#include "Std_Types.h"
#include "Fls.h"
#include "Eep.h"
#include "Fee.h"
#include "Ea.h"
#include "MemIf.h"
#include "NvM.h"
#include "Autosar_CDD.h"

/*------------------------------------------------------------------------------
 * Demo Configuration
 *----------------------------------------------------------------------------*/
#define DEMO_MAIN_FUNCTION_CYCLES   (6U)   /* Number of 10ms cycles to simulate */

/*******************************************************************************
 * MAIN FUNCTION - ECU Lifecycle Simulation
 ******************************************************************************/
int main(void)
{
    uint32 cycle;

    /*=========================================================================
     * PHASE 1: ECU STARTUP (Ignition ON)
     *
     * ELI5: Car is turning on! Initialize everything in order:
     *       First the hardware (Flash, EEPROM), then the software layers.
     *
     * ELI25: AUTOSAR defines initialization order - lower layers first:
     *        Fls → Fee → Eep → Ea → NvM → Application
     *========================================================================*/

    /* Initialize MCAL (Microcontroller Abstraction Layer) */
    Fls_Init();     /* Flash driver */
    Eep_Init();     /* EEPROM driver */

    /* Initialize Abstraction Layer */
    Fee_Init();     /* Flash EEPROM Emulation */
    Ea_Init();      /* EEPROM Abstraction */

    /* Initialize Service Layer */
    NvM_Init();     /* NVRAM Manager */

    /* Load all saved data */
    NvM_ReadAll();

    /* Initialize Application */
    Autosar_CDD_Init();

    /*=========================================================================
     * PHASE 2: NORMAL OPERATION (Driving)
     *
     * ELI5: Now we're driving! The car checks things every 10 milliseconds.
     *
     * ELI25: OS scheduler calls MainFunction cyclically. Real period is
     *        typically 10ms as shown in Mihai's Task_10ms diagram.
     *========================================================================*/

    printf("═══════════════════ NORMAL OPERATION ═══════════════════\n\n");
    printf("[MAIN]  Simulating %u cycles of 10ms task...\n\n", DEMO_MAIN_FUNCTION_CYCLES);

    for (cycle = 1; cycle <= DEMO_MAIN_FUNCTION_CYCLES; cycle++) {
        /* Simulate OS calling our cyclic task */
        Autosar_CDD_MainFunction();
    }

    printf("\n[MAIN]  Simulation ended. Driver turns key to OFF.\n");

    /*=========================================================================
     * PHASE 3: SHUTDOWN (Ignition OFF)
     *
     * ELI5: Driver is leaving! Save everything before power goes away!
     *
     * ELI25: ECU State Manager triggers shutdown sequence.
     *        NvM_WriteAll must complete before power loss.
     *========================================================================*/

    Autosar_CDD_Stop();
    NvM_WriteAll();

    /*=========================================================================
     * FINAL OUTPUT
     *========================================================================*/

    printf("\n");
    printf("╔══════════════════════════════════════════════════════════════╗\n");
    printf("║                    DEMO COMPLETE                              ║\n");
    printf("╠══════════════════════════════════════════════════════════════╣\n");
    printf("║  Data has been saved to:                                      ║\n");
    printf("║    • sim_flash.bin   (Driver Profile via Fee)                 ║\n");
    printf("║    • sim_eeprom.bin  (Odometer via EA)                        ║\n");
    printf("║                                                               ║\n");
    printf("║  Run the demo again to see data being RESTORED!               ║\n");
    printf("╚══════════════════════════════════════════════════════════════╝\n");

    return 0;
}