/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2023 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */


#include "main.h"

static void Init(void);


/**
  * @brief  The application entry point.
  * @retval int
  */
int boot(void) {

    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

    LL_APB1_GRP2_EnableClock(LL_APB1_GRP2_PERIPH_SYSCFG);
    LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);

    Init();

    LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_3);
    LL_mDelay(100);
    LL_GPIO_SetOutputPin(GPIOA, LL_GPIO_PIN_3);

    /* Infinite loop */

    while (1) {


    }

}

static void Init(void) {
    LL_FLASH_SetLatency(LL_FLASH_LATENCY_1);
    while (LL_FLASH_GetLatency() != LL_FLASH_LATENCY_1) {
    }
    LL_RCC_HSI_Enable();

    /* Wait till HSI is ready */
    while (LL_RCC_HSI_IsReady() != 1) {

    }
    LL_RCC_HSI_SetCalibTrimming(16);
    LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI_DIV_2, LL_RCC_PLL_MUL_12);
    LL_RCC_PLL_Enable();

    /* Wait till PLL is ready */
    while (LL_RCC_PLL_IsReady() != 1) {

    }
    LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
    LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
    LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);

    /* Wait till System clock is ready */
    while (LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL) {

    }
    LL_Init1msTick(48000000);
    LL_SetSystemCoreClock(48000000);

    LL_GPIO_InitTypeDef GPIO_InitStruct = {0};

    /* GPIO Ports Clock Enable */
    LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOA);

    /**/
    LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_3);

    /**/
    GPIO_InitStruct.Pin = LL_GPIO_PIN_3;
    GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
    GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
    GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
    LL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}


void Error_Handler(void) {

    /* User can add his own implementation to report the HAL error return state */
    __disable_irq();
    while (1) {
    }

}