/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @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.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
#include <string.h>
#include "lcd.h"

char *text = "CHOOSE PRODUCT";
char *text1 = "DAL";
char *text2 = "NATI BISCUIT";
char *text3 = "MAMA WAFER";
char *text4 = "CHOOSE AGAIN";
char *text5 = "PAY 5TK COIN";
char *text6 = "PAYMENT OK";
char *text7 = "ITEM DELIVERED>>";
char *text8 = "PAYMENT MODE";
char *text9 = "PRODUCT IS NOT";
char *text10 = "AVAILAVBLE";
char *text11 = "PURCHASE SUCCESS";
char *text13 = "LEXSUS";
char *text14 = "->>>WELCOME<<<-";
char *text15 = "CHOOSE ANOTHER";
char *text16 = "PRODUCT";
char *text12 = "";
char *firstrow = "";
char *secondrow = "";
int press = 0;
int confirm=0;
int buzz=0;
int reset=0;
int irsensor1=0;
int irsensor2=0;
int irsensor3=0;
int irsensor4=0;
int motor1=0;
int motor2=0;
int motor3=0;
int motor4=0;
int i=0;
int z=1;
int x=0;
int y=0;



void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) {
   if(GPIO_Pin == GPIO_PIN_0 && z==1){
	       press++;
	       if (press == 1) {
	       firstrow = text;
	       secondrow = text1;
	       } else if (press == 2) {
	       firstrow = text;
	       secondrow = text2;
	       } else if (press== 3) {
	       firstrow = text;
	       secondrow = text3;
	       } else if (press== 4) {
		       firstrow = text;
		       secondrow = text13;
		   }
	        else {
	       press = 1;
	       firstrow = text;
	       secondrow = text1;
           }


      }
   if((GPIO_Pin == GPIO_PIN_1) && (press == 1 || press == 2 || press == 3 || press==4) && (z==1)){
        confirm=confirm<2;
	   irsensor1=HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4);
	   irsensor2=HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_5);
	   irsensor3=HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_6);
	   irsensor4=HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_7);

      if (confirm == 1 && press == 1 && irsensor1 == 1)  {
    	firstrow = text8;
        secondrow = text5;
        y=1;
      }
      else if (confirm == 1 && press == 2 && irsensor2 == 1){
    	 firstrow = text8;
    	 secondrow = text5;
    	 y=1;
      }
      else if (confirm == 1 && press == 3 && irsensor3 == 1){
          	 firstrow = text8;
          	 secondrow = text5;
          	y=1;
            }
      else if (confirm == 1 && press == 4 && irsensor4 == 1){
              firstrow = text8;
              secondrow = text5;
                	y=1;
                  }
      else {
    	  firstrow = text15;
    	  secondrow = text16;
          press=0;
    	  confirm=0;
    	  buzz=1;
    	  }

   }
   if( GPIO_Pin == GPIO_PIN_3 && (press == 1 || press == 2 || press == 3 || press==4) && y==1 )  {

	   motor2=1;
	   motor3=1;
	   motor4=1;
	   motor1=1;
	   z=0;
       x=1;
       y=0;
       buzz=2;
	   }



}
/* 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 ---------------------------------------------------------*/
TIM_HandleTypeDef htim1;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM1_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

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




//int row=0;
//int col=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_TIM1_Init();
  /* USER CODE BEGIN 2 */
  lcd_init();
  lcd_backlight(1); // Turn on backlight

  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_4);



  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */

   // Counter to track button presses

   while (1) {

	 lcd_set_cursor(0, 0);
     lcd_write_string(firstrow);
     lcd_set_cursor(1, 0);
     lcd_write_string(secondrow);
     HAL_Delay(500);
     lcd_clear();

     if (buzz==1){
			 HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12,1);
			 HAL_Delay(1000);
			 HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12,0);
			 lcd_set_cursor(0, 0);
			 lcd_write_string(text9);
			 lcd_set_cursor(1, 0);
			 lcd_write_string(text10);
			 HAL_Delay(2000);
			 lcd_clear();
			 buzz=0;

         }

     if (buzz==2){
			  for(i=0; i<5; i++) {
			  HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_12);
			  HAL_Delay(100);
			  }
			  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, 0);
			  lcd_set_cursor(0, 0);
			  lcd_write_string(text8);
			  lcd_set_cursor(1, 0);
			  lcd_write_string(text6);
			  //HAL_Delay(500);
			// lcd_clear();
			   buzz=0;
          }

     if ( motor1==1 && press==1 &&  x==1 ){

   			   TIM1->CCR1=65535;
   			   HAL_Delay(700);
   			   TIM1->CCR1=0;
   	   		   //motor1=2;
   	   		   x=2;
   		 	   }
   	else if ( motor2==1 && press==2 &&  x==1){

			  TIM1->CCR2=65535;
			  HAL_Delay(1000);
			  TIM1->CCR2=0;
			  //motor2=2;
			  x=2;
   		   		 	   }
   	else if ( motor3==1 && press==3 &&  x==1){

   		   	TIM1->CCR3=55000;
   		   	HAL_Delay(700);
   		   	TIM1->CCR3=0;
   		    //motor3=2;
   		    x=2;
   		   }

   	else if ( motor4==1 && press==4 &&  x==1 ){

   		   	TIM1->CCR4=55000;
   		   	HAL_Delay(900);
   		   	TIM1->CCR4=0;
   		   	//motor4=2;
   		   	x=2;
   		   	 }

       if ( x==2) {

                x=0;
                z=1;
                y=0;
                press=0;
                confirm=0;
                motor1=0;
                motor2=0;
                motor3=0;
                motor4=0;
                lcd_set_cursor(0, 0);
                lcd_write_string(text11);
                lcd_set_cursor(1, 0);
                lcd_write_string(text7);
                HAL_Delay(5000);
                lcd_clear();
                reset=0;
                 }


       if ( reset==0) {
    	   firstrow = text14;
    	   secondrow = text;
       }
       if ( press<=4) {
           	   reset=1;
              }

      }



    /* 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};

  /** 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.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  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_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief TIM1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_TIM1_Init(void)
{

  /* USER CODE BEGIN TIM1_Init 0 */

  /* USER CODE END TIM1_Init 0 */

  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};
  TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};

  /* USER CODE BEGIN TIM1_Init 1 */

  /* USER CODE END TIM1_Init 1 */
  htim1.Instance = TIM1;
  htim1.Init.Prescaler = 0;
  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim1.Init.Period = 65535;
  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim1.Init.RepetitionCounter = 0;
  htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 0;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
  sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
  {
    Error_Handler();
  }
  sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
  sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
  sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
  sBreakDeadTimeConfig.DeadTime = 0;
  sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
  sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
  sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
  if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM1_Init 2 */

  /* USER CODE END TIM1_Init 2 */
  HAL_TIM_MspPostInit(&htim1);

}

/**
  * @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_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, LCD_RS_Pin|LCD_E_Pin|LCD_D4_Pin|LCD_D5_Pin
                          |LCD_D6_Pin|LCD_D7_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(BUZZER_OUTPUT_GPIO_Port, BUZZER_OUTPUT_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pins : LCD_RS_Pin LCD_E_Pin LCD_D4_Pin LCD_D5_Pin
                           LCD_D6_Pin LCD_D7_Pin */
  GPIO_InitStruct.Pin = LCD_RS_Pin|LCD_E_Pin|LCD_D4_Pin|LCD_D5_Pin
                          |LCD_D6_Pin|LCD_D7_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pin : PAYMENT_INPUT_Pin */
  GPIO_InitStruct.Pin = PAYMENT_INPUT_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(PAYMENT_INPUT_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : CHOOSE_INPUT_Pin CONFIRM_INPUT_Pin */
  GPIO_InitStruct.Pin = CHOOSE_INPUT_Pin|CONFIRM_INPUT_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

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

  /*Configure GPIO pins : IR_SENSOR_4_Pin IR_SENSOR_3_Pin IR_SENSOR_2_Pin */
  GPIO_InitStruct.Pin = IR_SENSOR_4_Pin|IR_SENSOR_3_Pin|IR_SENSOR_2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLDOWN;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : IR_SENSOR_1_Pin */
  GPIO_InitStruct.Pin = IR_SENSOR_1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(IR_SENSOR_1_GPIO_Port, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI0_IRQn);

  HAL_NVIC_SetPriority(EXTI1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI1_IRQn);

  HAL_NVIC_SetPriority(EXTI3_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI3_IRQn);

/* 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 */