/* 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 "stm32c0xx_hal.h"
#include "spi_ili9341.h"
#include <stdlib.h>

#define User_Button_Pin GPIO_PIN_13
#define User_Button_GPIO_Port GPIOC
#define User_Button_EXTI_IRQn EXTI4_15_IRQn
#define Led_Pin GPIO_PIN_5
#define Led_GPIO_Port GPIOA

I2C_HandleTypeDef hi2c1;
SPI_HandleTypeDef hspi1;
UART_HandleTypeDef huart2;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
void DrawNumber(uint8_t number);

void ControlPin_Init()
{
	  GPIO_InitTypeDef GPIO_InitStruct = {0};

	  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9 | GPIO_PIN_6 | GPIO_PIN_8, GPIO_PIN_RESET);
	  GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_6 | GPIO_PIN_8;
	  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
	  GPIO_InitStruct.Pull = GPIO_NOPULL;
	  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

uint16_t ToRGB565(uint32_t clr)
{
    uint8_t *rgb888Pixel = (uint8_t*)&clr;

    uint8_t red   = rgb888Pixel[2];
    uint8_t green = rgb888Pixel[1];
    uint8_t blue  = rgb888Pixel[0];

    uint16_t b = (blue >> 3) & 0x1f;
    uint16_t g = ((green >> 2) & 0x3f) << 5;
    uint16_t r = ((red >> 3) & 0x1f) << 11;
    return (uint16_t) (r | g | b);
}

int main(void)
{
  HAL_Init();

  SystemClock_Config();
  MX_GPIO_Init();
  MX_SPI1_Init();

  ControlPin_Init();

  TFT9341_ini(240, 360);
  //HAL_Delay(500);
  TFT9341_FillScreen(ToRGB565(0x28bf11)); // regular hex value from color picker #28bf11
  //HAL_Delay(1500);

  TFT9341_SetTextColor(TFT9341_WHITE);
  TFT9341_SetBackColor(TFT9341_BLACK);
  TFT9341_SetFont(&Font24);
  
  uint8_t number = 0;
  DrawNumber(number);

  while (1)
  {
	  int incrementButton = HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_3);
	  int resetButton = HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4);

	  if(incrementButton){
		  number++;
      DrawNumber(number);
	  }
	  if(resetButton){
		  number = 0;
      DrawNumber(number);
	  }
  }
}

void DrawNumber(uint8_t number)
{
  uint8_t numBuffer = number, digitCount = 0;
  while(numBuffer > 0 || digitCount == 0){
    numBuffer = numBuffer / 10;
    digitCount++;
  }
  
  char strBuffer[10] = {0};
  sprintf(strBuffer, "%lu", number);
  
  TFT9341_FillRect(0,0,230,35,ToRGB565(0x28bf11));
  for(uint8_t i; i< digitCount; i++){    
    TFT9341_DrawChar(i*17+10,10,strBuffer[i]);
  }
}

/**
  * @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.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;

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

static void MX_SPI1_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_I2S1;
  PeriphClkInit.I2s1ClockSelection = RCC_I2S1CLKSOURCE_SYSCLK;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }

  /* Peripheral clock enable */
  __HAL_RCC_SPI1_CLK_ENABLE();

  __HAL_RCC_GPIOA_CLK_ENABLE();
  /**SPI1 GPIO Configuration
  PA1     ------> SPI1_SCK
  PA7     ------> SPI1_MOSI
  */
  GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_7;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF0_SPI1;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 10; //7
  hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
  hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
    Error_Handler();
  }
}

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


  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3|GPIO_PIN_4, GPIO_PIN_RESET);
  /*Configure GPIO pins : PB3 PB4 */
  GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI4_15_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);

}

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 */