/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file           : main.c
 * @brief          : Main program body
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2025 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.
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "printf.h"
#include <usart2_it.h>
#include <usart6_it.h>
#include "usart1_it.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c1;

UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;
UART_HandleTypeDef huart6;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_USART6_UART_Init(void);
static void MX_I2C1_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/***************************************************************************//**
 * @brief Character send interface for printf function
 *//****************************************************************************/
void printf_putc(void *p, char c) {
   Usart1_PutByte(c);
}

/***************************************************************************//**
 * @brief Check if specified time interval has elapsed
 * @param tref Pointer to time reference variable
 * @param tcycle Time interval in milliseconds
 *//****************************************************************************/
static inline uint32_t TickChk(uint32_t *tref, int_fast16_t tcycle) {
   int32_t tdif = SysTickCnt - *tref;
   if (tdif >= tcycle) {
      *tref += tcycle;
      return 1;
   }
   return 0;
}

/* USER CODE END 0 */

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

   /* USER CODE BEGIN 1 */

   /* USER CODE END 1 */

   /* MCU Configuration--------------------------------------------------------*/

   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
   HAL_Init();

   /* USER CODE BEGIN Init */

   /* USER CODE END Init */

   /* Configure the system clock */
   SystemClock_Config();

   /* USER CODE BEGIN SysInit */

   /* USER CODE END SysInit */

   /* Initialize all configured peripherals */
   MX_GPIO_Init();
   MX_USART2_UART_Init();
   MX_USART6_UART_Init();
   MX_I2C1_Init();
   MX_USART1_UART_Init();
   /* USER CODE BEGIN 2 */

   Usart2_Init();
   Usart6_Init();
   Usart1_Init();
   init_printf(NULL, &printf_putc);
   printf("Nucleo UART with IRQ and ring buffer\n");
   /* USER CODE END 2 */

   /* Infinite loop */
   /* USER CODE BEGIN WHILE */
   while (1) {
      static uint32_t Tick10msRef = 0;
      if (TickChk(&Tick10msRef, 10)) {
      }

      static uint32_t Tick1secRef = 0;
      if (TickChk(&Tick1secRef, 1000)) {
      }

      int c;

      c = Usart2_GetByte();
      if (c != -1) {// new incoming data
         Usart6_PutByte(c);// UART2rx --> UART6tx
      }

      c = Usart6_GetByte();
      if (c != -1) {// new incoming data
         Usart2_PutByte(c);// UART6rx --> UART2tx
      }

      /* USER CODE END WHILE */

      /* USER CODE BEGIN 3 */
   }
   /* USER CODE END 3 */
}

/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void) {
   RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
   RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };

   /** Configure the main internal regulator output voltage
    */
   __HAL_RCC_PWR_CLK_ENABLE();
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);

   /** Initializes the RCC Oscillators according to the specified parameters
    * in the RCC_OscInitTypeDef structure.
    */
   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
   RCC_OscInitStruct.PLL.PLLM = 8;
   RCC_OscInitStruct.PLL.PLLN = 256;
   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8;
   RCC_OscInitStruct.PLL.PLLQ = 7;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
      Error_Handler();
   }

   /** Initializes the CPU, AHB and APB buses clocks
    */
   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
         | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
      Error_Handler();
   }
}

/**
 * @brief I2C1 Initialization Function
 * @param None
 * @retval None
 */
static void MX_I2C1_Init(void) {

   /* USER CODE BEGIN I2C1_Init 0 */

   /* USER CODE END I2C1_Init 0 */

   /* USER CODE BEGIN I2C1_Init 1 */

   /* USER CODE END I2C1_Init 1 */
   hi2c1.Instance = I2C1;
   hi2c1.Init.ClockSpeed = 100000;
   hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
   hi2c1.Init.OwnAddress1 = 0;
   hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
   hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
   hi2c1.Init.OwnAddress2 = 0;
   hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
   hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
   if (HAL_I2C_Init(&hi2c1) != HAL_OK) {
      Error_Handler();
   }
   /* USER CODE BEGIN I2C1_Init 2 */

   /* USER CODE END I2C1_Init 2 */

}

/**
 * @brief USART1 Initialization Function
 * @param None
 * @retval None
 */
static void MX_USART1_UART_Init(void) {

   /* USER CODE BEGIN USART1_Init 0 */

   /* USER CODE END USART1_Init 0 */

   /* USER CODE BEGIN USART1_Init 1 */

   /* USER CODE END USART1_Init 1 */
   huart1.Instance = USART1;
   huart1.Init.BaudRate = 115200;
   huart1.Init.WordLength = UART_WORDLENGTH_8B;
   huart1.Init.StopBits = UART_STOPBITS_1;
   huart1.Init.Parity = UART_PARITY_NONE;
   huart1.Init.Mode = UART_MODE_TX_RX;
   huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
   huart1.Init.OverSampling = UART_OVERSAMPLING_16;
   if (HAL_UART_Init(&huart1) != HAL_OK) {
      Error_Handler();
   }
   /* USER CODE BEGIN USART1_Init 2 */

   /* USER CODE END USART1_Init 2 */

}

/**
 * @brief USART2 Initialization Function
 * @param None
 * @retval None
 */
static void MX_USART2_UART_Init(void) {

   /* USER CODE BEGIN USART2_Init 0 */

   /* USER CODE END USART2_Init 0 */

   /* USER CODE BEGIN USART2_Init 1 */

   /* USER CODE END USART2_Init 1 */
   huart2.Instance = USART2;
   huart2.Init.BaudRate = 115200;
   huart2.Init.WordLength = UART_WORDLENGTH_8B;
   huart2.Init.StopBits = UART_STOPBITS_1;
   huart2.Init.Parity = UART_PARITY_NONE;
   huart2.Init.Mode = UART_MODE_TX_RX;
   huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
   huart2.Init.OverSampling = UART_OVERSAMPLING_16;
   if (HAL_UART_Init(&huart2) != HAL_OK) {
      Error_Handler();
   }
   /* USER CODE BEGIN USART2_Init 2 */

   /* USER CODE END USART2_Init 2 */

}

/**
 * @brief USART6 Initialization Function
 * @param None
 * @retval None
 */
static void MX_USART6_UART_Init(void) {

   /* USER CODE BEGIN USART6_Init 0 */

   /* USER CODE END USART6_Init 0 */

   /* USER CODE BEGIN USART6_Init 1 */

   /* USER CODE END USART6_Init 1 */
   huart6.Instance = USART6;
   huart6.Init.BaudRate = 115200;
   huart6.Init.WordLength = UART_WORDLENGTH_8B;
   huart6.Init.StopBits = UART_STOPBITS_1;
   huart6.Init.Parity = UART_PARITY_NONE;
   huart6.Init.Mode = UART_MODE_TX_RX;
   huart6.Init.HwFlowCtl = UART_HWCONTROL_NONE;
   huart6.Init.OverSampling = UART_OVERSAMPLING_16;
   if (HAL_UART_Init(&huart6) != HAL_OK) {
      Error_Handler();
   }
   /* USER CODE BEGIN USART6_Init 2 */

   /* USER CODE END USART6_Init 2 */

}

/**
 * @brief GPIO Initialization Function
 * @param None
 * @retval None
 */
static void MX_GPIO_Init(void) {
   GPIO_InitTypeDef GPIO_InitStruct = { 0 };
   /* USER CODE BEGIN MX_GPIO_Init_1 */

   /* USER CODE END MX_GPIO_Init_1 */

   /* GPIO Ports Clock Enable */
   __HAL_RCC_GPIOC_CLK_ENABLE();
   __HAL_RCC_GPIOH_CLK_ENABLE();
   __HAL_RCC_GPIOA_CLK_ENABLE();
   __HAL_RCC_GPIOB_CLK_ENABLE();

   /*Configure GPIO pin Output Level */
   HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);

   /*Configure GPIO pin : B1_Pin */
   GPIO_InitStruct.Pin = B1_Pin;
   GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);

   /*Configure GPIO pin : LD2_Pin */
   GPIO_InitStruct.Pin = LD2_Pin;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
   HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);

   /* USER CODE BEGIN MX_GPIO_Init_2 */

   /* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
 * @brief  This function is executed in case of error occurrence.
 * @retval None
 */
void Error_Handler(void) {
   /* USER CODE BEGIN Error_Handler_Debug */
   /* User can add his own implementation to report the HAL error return state */
   __disable_irq();
   while (1) {
   }
   /* USER CODE END Error_Handler_Debug */
}
#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)
{
  /* USER CODE BEGIN 6 */
   /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */