Настройка main() в сгенерированном коде

#include "stm32f4xx_hal.h"
#include "$model_name.h"

// Timer and GPIO handles
TIM_HandleTypeDef htim2;
GPIO_InitTypeDef GPIO_InitStruct = {0};


// Function to initialize GPIO for LED
void GPIO_Init(void) {
    __HAL_RCC_GPIOD_CLK_ENABLE(); // Enable GPIOD clock
    GPIO_InitStruct.Pin = GPIO_PIN_12; // PD12 (Green LED on STM32F4 Discovery)
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; // Push-pull output
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
}

// Function to initialize TIM2 for 20 Hz
void TIM2_Init(void) {
    __HAL_RCC_TIM2_CLK_ENABLE(); // Enable TIM2 clock
    htim2.Instance = TIM2;
    htim2.Init.Prescaler = 15999; // 16 MHz / (15999 + 1) = 1 kHz
    htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim2.Init.Period = 49; // 1 kHz / (49 + 1) = 20 Hz
    htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
    HAL_TIM_Base_Init(&htim2);

    // Enable interrupt
    HAL_TIM_Base_Start_IT(&htim2);
    HAL_NVIC_SetPriority(TIM2_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(TIM2_IRQn);
}

// Timer interrupt callback
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
    if (htim->Instance == TIM2) {
        $model_step
		if ((uint8_t) $(output(2)) == 1)
            HAL_GPIO_TogglePin(GPIOD, GPIO_PIN_12); // Toggle LED
    }
}

// Timer interrupt handler
void TIM2_IRQHandler(void) {
    HAL_TIM_IRQHandler(&htim2);
}

// System Clock Configuration (using HSI, 16 MHz)
void SystemClock_Config(void) {
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
    HAL_RCC_OscConfig(&RCC_OscInitStruct);

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
}

int main(void) {
    HAL_Init(); // Initialize HAL
    SystemClock_Config(); // Configure system clock
    GPIO_Init(); // Initialize GPIO
    TIM2_Init(); // Initialize TIM2
    $model_init
    // Start timer
    HAL_TIM_Base_Start_IT(&htim2);

    while (1) {

    }
}