/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2022 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"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
#include "stm32f4xx_ll_gpio.h"
#include "lcd.h"
/* USER CODE END Includes */

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

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
//ECE177 #defines here
#define nop() __asm("\tnop\n\t")

#define BUFFSIZE 16

#define LEDS GPIOC->ODR
#define DRIVE_KEYPAD_ROW(row) (GPIOB->MODER = 0x01 << (4+(row))*2)
#define READ_KEYPAD_COL(col) (GPIOB->IDR >> colmap[col] & 0x01)

/* USER CODE END PD */

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

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
//ECE177 -- used for getkey()
unsigned char colmap[] = {8, 9, 10, 12};

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
//ECE177 function prototypes here
signed char getkey(void);			// forward declarations
signed char mapkey(signed char key);
char getpw(char maxsize, char pw[]); 	// Input keys into the array
char compareArrays(char size, const char a1[], const char a2[]);
void mydelayms(unsigned int ms);

//void setTMR1(int timerval);

/* 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 */

	/* 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();
  /* USER CODE BEGIN 2 */
  //ECE177 Some initialization here
	lcd_init();

	GPIOB->OTYPER = 0x0000;		// GPIOB (Keypad) pins, when outputs, are "push-pull" type
	GPIOB->MODER = 0x0000;	// All bits of GPIOB are initially inputs
	GPIOB->ODR = 0xFFFF;		// When GPIOB (keypad row) bits are output, the are logic 1

	char passwd[] = {1,5,9,13};	//You should be able to change the password by only changing these two lines
	char pwsize = 4;
	char pwbuff[BUFFSIZE];

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
//	  GPIOC->ODR = GPIOB->IDR>>4;		// If needed for testing
//	  continue;

//ECE177 main code here

    /* 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_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
  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_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

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

/* USER CODE BEGIN 4 */
//ECE177 Put your functions here (finish them up)

signed char getkey(void) {
// This routine will get a key on the keypad and will return the key number
// below, or -1 if no key is pressed.
// Keys are numbered top to bottom and left to right and the keypad is mapped
// as follows

//             GPIO->ODR
//             Output	Key                 KEY
//             Bits     Number            LABELING
//              4 |  0  1  2  3        | 1  2  3  A
//              5 |  4  5  6  7        | 4  5  6  B
//              6 |  8  9 10 11        | 7  8  9  C
//              7 | 12 13 14 15        | *  0  #  D
//                 ------------         ------------
//                   8  9 10 12
//             GPIO->IDR Input Bits

// Your code here	
}


signed char mapkey(signed char key) {
//	Return the mapping of the given key according to the following

//             GPIO->ODR
//             Output	Key                 KEY
//             Bits     Number            LABELING
//              4 |  0  1  2  3        | 1  2  3  A
//              5 |  4  5  6  7        | 4  5  6  B
//              6 |  8  9 10 11        | 7  8  9  C
//              7 | 12 13 14 15        | *  0  #  D
//                 ------------         ------------
//                   8  9 10 12
//             GPIO->IDR Input Bits

// Your code here
}


char getpw(char maxsize, char pw[]) { 		// Input keys into the array

// Your code here	
}


char compareArrays(char size, const char a1[], const char a2[]) {	// return true if arrays are equal

// Your code here
}


void mydelayms(unsigned int ms) {
	
// Your code here
}

/* 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 */