#include "stm32c0xx_hal.h"
#include <string.h>
#include "lcd.h"
#include "keypad.h"


#define PASSWORD_LENGTH 4

// LCD Pin Mapping on GPIOB
#define RS_Pin GPIO_PIN_0
#define E_Pin  GPIO_PIN_1
#define D4_Pin GPIO_PIN_2
#define D5_Pin GPIO_PIN_3
#define D6_Pin GPIO_PIN_4
#define D7_Pin GPIO_PIN_5
#define LCD_Port GPIOB


// === MAIN SETUP ===
void SystemClock_Config(void);
static void MX_GPIO_Init(void);

char Correct_Password[PASSWORD_LENGTH + 1] = "1234";
char Entered_Password[PASSWORD_LENGTH + 1] = {0};
uint8_t password_index = 0;


int main(void) {
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();

    LCD_Init();
    LCD_SetCursor(0, 0);
    LCD_WriteString("A:   B:   C:   D:");

    while (1) {
      
    }
}




void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  // Configure HSI as system clock source
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  // NO PLL available in basic config for STM32C031C6 on Wokwi
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  // Clock configuration: use HSI for SYSCLK
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}



static void MX_GPIO_Init(void) {

    __HAL_RCC_GPIOA_CLK_ENABLE();  // Ensure GPIOA clock is enabled
    __HAL_RCC_GPIOB_CLK_ENABLE();

    //GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitTypeDef GPIO_InitStruct = {0};

    // LCD Pins PB0–PB5: Output
    GPIO_InitStruct.Pin = RS_Pin|E_Pin|D4_Pin|D5_Pin|D6_Pin|D7_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(LCD_Port, &GPIO_InitStruct);

    // Keypad Rows PB6–PB9: Output
    GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    // Keypad Cols PB10–PB13: Input with Pull-Up
    GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13;
    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    //FOR RGB LED'S
    
  //  __HAL_RCC_GPIOA_CLK_ENABLE();  // Ensure GPIOA clock is enabled
    GPIO_InitStruct.Pin = GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
    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);

}

void Error_Handler(void)
{
  // You can blink an LED here or print an error if needed
  while (1)
  {
    // Infinite loop to indicate error
  }
}