/* 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 "SPI_camera.hpp"
#include "OV2640.hpp"
#include "OV2640_regs.hpp"
#include "butcube_imager.hpp"
/* 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 ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c1;

SPI_HandleTypeDef hspi1;
DMA_HandleTypeDef hdma_spi1_rx;
DMA_HandleTypeDef hdma_spi1_tx;

UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_I2C1_Init(void);
static void MX_SPI1_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

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

void Image_capture(OV2640 *camera, ButCube_imager *transmitter){
    HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);

    camera->Init(OV2640_320x240_JPEG);

    HAL_Delay(1000);

    camera->Capture();
    transmitter->Transmit(camera->Image_data());
}

/* 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_DMA_Init();
    MX_I2C1_Init();
    MX_SPI1_Init();
    MX_USART1_UART_Init();
    /* USER CODE BEGIN 2 */

    // Initialize SPI clock
    uint8_t empty = 0x00;
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);
    HAL_SPI_Transmit(&hspi1, &empty, 1, HAL_MAX_DELAY);
    HAL_SPI_Receive(&hspi1, (uint8_t *) &empty, 1, HAL_MAX_DELAY);
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);

    // Initialize LEDs
    HAL_GPIO_WritePin(LED2_GPIO_Port, LED2_Pin, GPIO_PIN_RESET);
    HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_SET);

    HAL_Delay(500);

    ButCube_imager *transmitter = new ButCube_imager();
    transmitter->Add_output(huart1);
    transmitter->Camera_power(true);

    // Wait for power rail to stabilize
    HAL_Delay(1000);

    OV2640 *camera = new OV2640(hi2c1, 0x60, hspi1, SPI_camera::Chip_select_pin{ GPIOB, GPIO_PIN_0 });

    /* USER CODE END 2 */
    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1) {
        /* USER CODE END WHILE */
        /* USER CODE BEGIN 3 */
        Image_capture(camera, transmitter);
    }
    /* USER CODE END 3 */
} // main

/**
  * @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
    */
    if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK) {
        Error_Handler();
    }

    /** Initializes the RCC Oscillators according to the specified parameters
    * in the RCC_OscInitTypeDef structure.
    */
    RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_MSI;
    RCC_OscInitStruct.MSIState            = RCC_MSI_ON;
    RCC_OscInitStruct.MSICalibrationValue = 0;
    RCC_OscInitStruct.MSIClockRange       = RCC_MSIRANGE_6;
    RCC_OscInitStruct.PLL.PLLState        = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource       = RCC_PLLSOURCE_MSI;
    RCC_OscInitStruct.PLL.PLLM            = 1;
    RCC_OscInitStruct.PLL.PLLN            = 40;
    RCC_OscInitStruct.PLL.PLLP            = RCC_PLLP_DIV7;
    RCC_OscInitStruct.PLL.PLLQ            = RCC_PLLQ_DIV2;
    RCC_OscInitStruct.PLL.PLLR            = RCC_PLLR_DIV2;
    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_DIV1;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
        Error_Handler();
    }
} // SystemClock_Config

/**
  * @brief I2C1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_I2C1_Init(void){
    /* USER CODE BEGIN I2C1_Init 0 */

    /* USER CODE END I2C1_Init 0 */

    /* USER CODE BEGIN I2C1_Init 1 */

    /* USER CODE END I2C1_Init 1 */
    hi2c1.Instance              = I2C1;
    hi2c1.Init.Timing           = 0x10909CEC;
    hi2c1.Init.OwnAddress1      = 0;
    hi2c1.Init.AddressingMode   = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode  = I2C_DUALADDRESS_DISABLE;
    hi2c1.Init.OwnAddress2      = 0;
    hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
    hi2c1.Init.GeneralCallMode  = I2C_GENERALCALL_DISABLE;
    hi2c1.Init.NoStretchMode    = I2C_NOSTRETCH_DISABLE;
    if (HAL_I2C_Init(&hi2c1) != HAL_OK) {
        Error_Handler();
    }

    /** Configure Analogue filter
    */
    if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK) {
        Error_Handler();
    }

    /** Configure Digital filter
    */
    if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK) {
        Error_Handler();
    }
    /* USER CODE BEGIN I2C1_Init 2 */

    /* USER CODE END I2C1_Init 2 */
} // MX_I2C1_Init

/**
  * @brief SPI1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_SPI1_Init(void){
    /* USER CODE BEGIN SPI1_Init 0 */

    /* USER CODE END SPI1_Init 0 */

    /* USER CODE BEGIN SPI1_Init 1 */

    /* USER CODE END SPI1_Init 1 */
    /* SPI1 parameter configuration*/
    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_256;
    hspi1.Init.FirstBit          = SPI_FIRSTBIT_MSB;
    hspi1.Init.TIMode            = SPI_TIMODE_DISABLE;
    hspi1.Init.CRCCalculation    = SPI_CRCCALCULATION_DISABLE;
    hspi1.Init.CRCPolynomial     = 7;
    hspi1.Init.CRCLength         = SPI_CRC_LENGTH_DATASIZE;
    hspi1.Init.NSSPMode          = SPI_NSS_PULSE_ENABLE;
    if (HAL_SPI_Init(&hspi1) != HAL_OK) {
        Error_Handler();
    }
    /* USER CODE BEGIN SPI1_Init 2 */

    /* USER CODE END SPI1_Init 2 */
}

/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void){
    /* USER CODE BEGIN USART1_Init 0 */

    /* USER CODE END USART1_Init 0 */

    /* USER CODE BEGIN USART1_Init 1 */

    /* USER CODE END USART1_Init 1 */
    huart1.Instance                    = USART1;
    huart1.Init.BaudRate               = 115200;
    huart1.Init.WordLength             = UART_WORDLENGTH_8B;
    huart1.Init.StopBits               = UART_STOPBITS_1;
    huart1.Init.Parity                 = UART_PARITY_NONE;
    huart1.Init.Mode                   = UART_MODE_TX_RX;
    huart1.Init.HwFlowCtl              = UART_HWCONTROL_NONE;
    huart1.Init.OverSampling           = UART_OVERSAMPLING_16;
    huart1.Init.OneBitSampling         = UART_ONE_BIT_SAMPLE_DISABLE;
    huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    if (HAL_UART_Init(&huart1) != HAL_OK) {
        Error_Handler();
    }
    /* USER CODE BEGIN USART1_Init 2 */

    /* USER CODE END USART1_Init 2 */
}

/**
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void){
    /* DMA controller clock enable */
    __HAL_RCC_DMA1_CLK_ENABLE();

    /* DMA interrupt init */
    /* DMA1_Channel2_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);
    /* DMA1_Channel3_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(DMA1_Channel3_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(DMA1_Channel3_IRQn);
}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void){
    GPIO_InitTypeDef GPIO_InitStruct = { 0 };

    /* GPIO Ports Clock Enable */
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    __HAL_RCC_GPIOH_CLK_ENABLE();

    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_15, GPIO_PIN_SET);

    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOA, CAMERA_EN_Pin | LED2_Pin, GPIO_PIN_RESET);

    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOB, CAMERA_CS_Pin | LED1_Pin, GPIO_PIN_RESET);

    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOH, GPIO_PIN_3, GPIO_PIN_SET);

    /*Configure GPIO pins : PA0 PA1 PA2 PA15 */
    GPIO_InitStruct.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_15;
    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 pins : CAMERA_EN_Pin LED2_Pin */
    GPIO_InitStruct.Pin   = CAMERA_EN_Pin | LED2_Pin;
    GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull  = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /*Configure GPIO pin : CAMERA_CS_Pin */
    GPIO_InitStruct.Pin   = CAMERA_CS_Pin;
    GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull  = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    HAL_GPIO_Init(CAMERA_CS_GPIO_Port, &GPIO_InitStruct);

    /*Configure GPIO pin : LED1_Pin */
    GPIO_InitStruct.Pin   = LED1_Pin;
    GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull  = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(LED1_GPIO_Port, &GPIO_InitStruct);

    /*Configure GPIO pin : PH3 */
    GPIO_InitStruct.Pin   = GPIO_PIN_3;
    GPIO_InitStruct.Mode  = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull  = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);
} // MX_GPIO_Init

/* 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 */