/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file           : main.c
 * @brief          : Main program body
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; Copyright (c) 2019 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
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "i2c.h"
#include "spi.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "pn532_stm32f1.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 ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
PN532 pn532;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

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

/* USER CODE END 0 */

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

  /* USER CODE BEGIN 1 */
  uint8_t buff[255];
  uint8_t uid[MIFARE_UID_MAX_LENGTH];
  uint8_t key_a[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
  uint32_t pn532_error = PN532_ERROR_NONE;
  int32_t uid_len = 0;
  /* 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_I2C1_Init();
  MX_USART1_UART_Init();
  MX_SPI1_Init();
  /* USER CODE BEGIN 2 */
  printf("Hello!\r\n");
  PN532 pn532;
  // PN532_SPI_Init(&pn532);
  PN532_I2C_Init(&pn532);
  PN532_GetFirmwareVersion(&pn532, buff);
  if (PN532_GetFirmwareVersion(&pn532, buff) == PN532_STATUS_OK)
  {
    printf("Found PN532 with firmware version: %d.%d\r\n", buff[1], buff[2]);
  }
  else
  {
    return -1;
  }
  PN532_SamConfiguration(&pn532);
  printf("Waiting for RFID/NFC card...\r\n");
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    // Check if a card is available to read
    uid_len = PN532_ReadPassiveTarget(&pn532, uid, PN532_MIFARE_ISO14443A, 1000);
    if (uid_len == PN532_STATUS_ERROR)
    {
      printf(".");
    }
    else
    {
      printf("Found card with UID: ");
      for (uint8_t i = 0; i < uid_len; i++)
      {
        printf("%02x ", uid[i]);
      }
      printf("\r\n");
      while (1)
      {
        printf(" Auth block 6..\r\n");
        pn532_error = PN532_MifareClassicAuthenticateBlock(&pn532, uid, uid_len,
                                                           6, MIFARE_CMD_AUTH_A, key_a);

        for (uint8_t i = 0; i < 16; i++)
        {
          buff[i] = 0x00;
        }
        pn532_error = PN532_MifareClassicReadBlock(&pn532, buff, 6);
        printf("Data read back: ");
        for (uint8_t i = 0; i < 16; i++)
        {
          printf("%02x ", buff[i]);
        }
        printf("\r\n");
        // Převod načtených 4 bajtů z bloku (např. buff[0]..buff[3]) na 32bitové číslo (big-endian)
        uint32_t value = (buff[0] << 24) | (buff[1] << 16) | (buff[2] << 8) | buff[3];
        printf("Cislo z bloku (big-endian): %lu\r\n", value);

        // Pokud je číslo v little-endian (často u Mifare), použij:
        uint32_t value_le = (buff[3] << 24) | (buff[2] << 16) | (buff[1] << 8) | buff[0];
        printf("Cislo z bloku (little-endian): %lu\r\n", value_le);
        while (PN532_ReadPassiveTarget(&pn532, uid, PN532_MIFARE_ISO14443A, 100) != PN532_STATUS_ERROR)
        {
          HAL_Delay(100);
        }
        printf("Card removed. Waiting for next card...\r\n");
        break; // Exit the inner while(1) to wait for a new card
        if (pn532_error)
        {
          printf("Error: 0x%02x\r\n", pn532_error);
        }
      }
    }
  }

  /* USER CODE END 3 */
}

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

  /** Initializes the RCC Oscillators according to the specified parameters
   * in the RCC_OscInitTypeDef structure.
   */
  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;
  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_HSI;
  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_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
   set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
/**
 * @brief  Retargets the C library printf function to the USART.
 * @param  None
 * @retval None
 */
PUTCHAR_PROTOTYPE
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */
  HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF);

  return ch;
}
/* 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 */

  /* 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,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */