/**
  ******************************************************************************
  * @file    main.c
  * @author  MCU Application Team
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2023 Puya Semiconductor Co.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by Puya under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private define ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
LPUART_HandleTypeDef hlpuart;

/* Buffer used for transmission */
uint8_t aTxStartMessage[] = "\n\r ****LPUART-Hyperterminal communication based on IT ****\n\r Enter 12 characters using keyboard :\n\r";
uint8_t aTxEndMessage[]   = "\n\r Example Finished\n\r";

/* Buffer used for reception */
uint8_t aRxBuffer[RXBUFFERSIZE];

/* Private user code ---------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void APP_SystemClockConfig(void);
static void APP_LPUART_Init(void);

/**
  * @brief  Main program.
  * @retval int
  */
int main(void)
{
  /* Reset of all peripherals, Initializes the Systick. */ 
  HAL_Init();
  
  /* System clock configuration */
  APP_SystemClockConfig(); 

  /* Initialize LED */
  BSP_LED_Init(LED_GREEN);

  /* Initialize LPUART */
  APP_LPUART_Init();

  /* Start the transmission process */
  if(HAL_LPUART_Transmit_IT(&hlpuart, (uint8_t*)aTxStartMessage, TXSTARTMESSAGESIZE)!= HAL_OK)
  {
    /* Transfer error in transmission process */
    APP_ErrorHandler();
  }

  /* Put LPUART peripheral in reception process */
  if(HAL_LPUART_Receive_IT(&hlpuart, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
  {
    /* Transfer error in reception process */
    APP_ErrorHandler();
  }

  /* Wait for the end of the transfer */
  while (HAL_LPUART_GetState(&hlpuart) != HAL_LPUART_STATE_READY)
  {
  }

  /* Send the received Buffer */
  if(HAL_LPUART_Transmit_IT(&hlpuart, (uint8_t*)aRxBuffer, RXBUFFERSIZE)!= HAL_OK)
  {
    /* Transfer error in transmission process */
    APP_ErrorHandler();
  }

  /* Wait for the end of the transfer */
  while (HAL_LPUART_GetState(&hlpuart) != HAL_LPUART_STATE_READY)
  {
  }

  /* Send the End Message */
  if(HAL_LPUART_Transmit_IT(&hlpuart, (uint8_t*)aTxEndMessage, TXENDMESSAGESIZE)!= HAL_OK)
  {
    /* Transfer error in transmission process */
    APP_ErrorHandler();
  }

  /* Wait for the end of the transfer */
  while (HAL_LPUART_GetState(&hlpuart) != HAL_LPUART_STATE_READY)
  {
  }

  /* Turn on LED if test passes then enter infinite loop */
  BSP_LED_On(LED_GREEN);

  /* Infinite loop */
  while (1)
  {
  }  
}

/**
  * @brief LPUART Initialization Function
  * @param None
  * @retval None
  */
static void APP_LPUART_Init(void)
{
  hlpuart.Instance                    = LPUART1;
  hlpuart.Init.BaudRate               = 115200;
  hlpuart.Init.WordLength             = LPUART_WORDLENGTH_8B;
  hlpuart.Init.StopBits               = LPUART_STOPBITS_1;
  hlpuart.Init.Parity                 = LPUART_PARITY_NONE;
  hlpuart.Init.Mode                   = LPUART_MODE_TX_RX;
  hlpuart.Init.HwFlowCtl              = LPUART_HWCONTROL_NONE;
  hlpuart.AdvancedInit.AdvFeatureInit = LPUART_ADVFEATURE_NO_INIT;
  if (HAL_LPUART_Init(&hlpuart) != HAL_OK)
  {
    APP_ErrorHandler();
  }
}

/**
  * @brief  System clock configuration function
  * @param  None
  * @retval None
  */
static void APP_SystemClockConfig(void)
{
  RCC_OscInitTypeDef  OscInitstruct = {0};
  RCC_ClkInitTypeDef  ClkInitstruct = {0};
  
  OscInitstruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_LSE | 
                                      RCC_OSCILLATORTYPE_LSI;
  OscInitstruct.HSIState            = RCC_HSI_ON;                               /* Enable HSI */
  OscInitstruct.HSIDiv              = RCC_HSI_DIV1;                             /* HSI 1 frequency division */
  OscInitstruct.HSICalibrationValue = RCC_HSICALIBRATION_8MHz;                  /* Configure HSI clock 8MHz */
  OscInitstruct.HSEState            = RCC_HSE_OFF;                              /* Close HSE */
/* OscInitstruct.HSEFreq             = RCC_HSE_24_32MHz; */                     /* Choose HSE frequency of 24-32MHz */
  OscInitstruct.LSEState            = RCC_LSE_OFF;                              /* Close LSE */
/* OscInitstruct.LSEDriver           = RCC_LSEDRIVE_HIGH; */                    /* Drive capability level: high */
  OscInitstruct.LSIState            = RCC_LSI_OFF;                              /* Close LSI */
  OscInitstruct.PLL.PLLState        = RCC_PLL_OFF;                              /* Close PLL */
/* OscInitstruct.PLL.PLLSource       = RCC_PLLSOURCE_HSI; */                    /* PLL clock source selection HSI */
/* OscInitstruct.PLL.PLLMUL          = RCC_PLL_MUL16; */                        /* PLL clock source 16-fold frequency */
  /* Configure oscillator */
  if(HAL_RCC_OscConfig(&OscInitstruct) != HAL_OK)
  {
    APP_ErrorHandler();
  }
  
  ClkInitstruct.ClockType       = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  ClkInitstruct.SYSCLKSource    = RCC_SYSCLKSOURCE_HSISYS;              /* System clock selection HSISYS */
  ClkInitstruct.AHBCLKDivider   = RCC_SYSCLK_DIV1;                      /* AHB clock 1 division */
  ClkInitstruct.APB1CLKDivider  = RCC_HCLK_DIV1;                        /* APB1 clock 1 division */
  ClkInitstruct.APB2CLKDivider  = RCC_HCLK_DIV2;                        /* APB2 clock 2 division */
  /* Configure Clock */
  if(HAL_RCC_ClockConfig(&ClkInitstruct, FLASH_LATENCY_0) != HAL_OK)
  {
    APP_ErrorHandler();
  }
}

/**
  * @brief  Error executing function.
  * @param  None
  * @retval None
  */
void APP_ErrorHandler(void)
{
  while (1)
  {
  }
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* Users can add their own printing information as needed,
     for example: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* Infinite loop */
  while (1)
  {
  }
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT Puya *****END OF FILE******************/
