File content as of revision 1:2105b8894450:

/**
  ******************************************************************************
  * @file    stm32l4r9i_discovery_camera.c
  * @author  MCD Application Team
  * @brief   This file includes the driver for Camera modules mounted on
  *          STM32L4R9I_DISCOVERY board.
  @verbatim
    How to use this driver:
    ------------------------
     - This driver is used to drive the camera.
     - The OV9655 component driver MUST be included with this driver.

    Driver description:
    -------------------
    + Initialization steps:
       o Initialize the camera using the BSP_CAMERA_Init() function.
       o Start the camera capture/snapshot using the CAMERA_Start() function.
       o Suspend, resume or stop the camera capture using the following functions:
        - BSP_CAMERA_Suspend()
        - BSP_CAMERA_Resume()
        - BSP_CAMERA_Stop()

    + Options
       o Increase or decrease on the fly the brightness and/or contrast
         using the following function:
         - BSP_CAMERA_ContrastBrightnessConfig
       o Add a special effect on the fly using the following functions:
         - BSP_CAMERA_BlackWhiteConfig()
         - BSP_CAMERA_ColorEffectConfig()
  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32l4r9i_discovery_camera.h"
#include "stm32l4r9i_discovery.h"
#include "stm32l4r9i_discovery_io.h"

/** @addtogroup BSP
  * @{
  */

/** @addtogroup STM32L4R9I_DISCOVERY
  * @{
  */

/** @defgroup STM32L4R9I_DISCOVERY_CAMERA STM32L4R9I_DISCOVERY CAMERA
  * @{
  */

/** @defgroup STM32L4R9I_DISCOVERY_CAMERA_Private_Defines Private Defines
  * @{
  */
#define CAMERA_VGA_RES_X          640
#define CAMERA_VGA_RES_Y          480
#define CAMERA_480x272_RES_X      480
#define CAMERA_480x272_RES_Y      272
#define CAMERA_QVGA_RES_X         320
#define CAMERA_QVGA_RES_Y         240
#define CAMERA_QQVGA_RES_X        160
#define CAMERA_QQVGA_RES_Y        120
/**
  * @}
  */

/** @defgroup STM32L4R9I_DISCOVERY_CAMERA_Private_Variables Private Variables
  * @{
  */
DCMI_HandleTypeDef  hDcmiHandler;
CAMERA_DrvTypeDef   *camera_drv;
/* Camera current resolution naming (QQVGA, VGA, ...) */
static uint32_t CameraCurrentResolution;

/* Camera module I2C HW address */
static uint32_t CameraHwAddress;

/**
  * @}
  */

/** @defgroup STM32L4R9I_DISCOVERY_CAMERA_Private_FunctionPrototypes Private Function Prototypes
  * @{
  */
static uint32_t GetSize(uint32_t resolution);
/**
  * @}
  */

/** @defgroup STM32L4R9I_DISCOVERY_CAMERA_Exported_Functions Exported Functions
  * @{
  */

/**
  * @brief  Initializes the camera.
  * @param  Resolution : camera sensor requested resolution (x, y) : standard resolution
  *         naming QQVGA, QVGA, VGA ...
  * @retval Camera status
  */
uint8_t BSP_CAMERA_Init(uint32_t Resolution)
{
  DCMI_HandleTypeDef *phdcmi;
  uint8_t status = CAMERA_ERROR;

  /* Get the DCMI handle structure */
  phdcmi = &hDcmiHandler;


  /* Initialize the IO functionalities */
  BSP_IO_Init();

  /* Set up the Camera */
  BSP_CAMERA_PwrUp();

  /*** Configures the DCMI to interface with the camera module ***/
  /* DCMI configuration */
  phdcmi->Init.CaptureRate      = DCMI_CR_ALL_FRAME;
  phdcmi->Init.HSPolarity       = DCMI_HSPOLARITY_HIGH;
  phdcmi->Init.SynchroMode      = DCMI_SYNCHRO_HARDWARE;
  phdcmi->Init.VSPolarity       = DCMI_VSPOLARITY_HIGH;
  phdcmi->Init.ExtendedDataMode = DCMI_EXTEND_DATA_8B;
  phdcmi->Init.PCKPolarity      = DCMI_PCKPOLARITY_RISING;
  phdcmi->Init.ByteSelectMode   = DCMI_BSM_ALL;
  phdcmi->Init.ByteSelectStart  = DCMI_OEBS_ODD;
  phdcmi->Init.LineSelectMode   = DCMI_LSM_ALL;
  phdcmi->Instance              = DCMI;

  /* Camera initialization */
  BSP_CAMERA_MspInit(&hDcmiHandler, NULL);

  /* Read ID of Camera module via I2C */
  if(ov9655_ReadID(CAMERA_I2C_ADDRESS) == OV9655_ID)
  {
    /* Initialize the camera driver structure */
    camera_drv = &ov9655_drv;
    CameraHwAddress = CAMERA_I2C_ADDRESS;

    /* DCMI Initialization */
    HAL_DCMI_Init(phdcmi);

    camera_drv->Init(CameraHwAddress, Resolution);

    /* Set the RGB565 mode */
    MFX_IO_Write(CameraHwAddress, 0x12 /*OV9655_COM7*/, 0x63);
    MFX_IO_Write(CameraHwAddress, 0x40 /*OV9655_COM15*/, 0x10);
    /* Invert the HRef signal */
    MFX_IO_Write(CameraHwAddress, 0x15 /*OV9655_COM10*/, 0x08);


    CameraCurrentResolution = Resolution;

    /* Return CAMERA_OK status */
    status = CAMERA_OK;
  }
  else
  {
    /* Return CAMERA_NOT_SUPPORTED status */
    status = CAMERA_NOT_SUPPORTED;
  }

  return status;
}

/**
  * @brief  DeInitializes the camera.
  * @retval Camera status
  */
uint8_t BSP_CAMERA_DeInit(void)
{
  hDcmiHandler.Instance              = DCMI;

  HAL_DCMI_DeInit(&hDcmiHandler);
  BSP_CAMERA_MspDeInit(&hDcmiHandler, NULL);

  /* Set Camera in Power Down */
  BSP_CAMERA_PwrDown();

  return CAMERA_OK;
}

/**
  * @brief  Starts the camera capture in continuous mode.
  * @param  buff: pointer to the camera output buffer
  * @retval None
  */
void BSP_CAMERA_ContinuousStart(uint8_t *buff)
{
  /* Start the camera capture */
   HAL_DCMI_Start_DMA(&hDcmiHandler, DCMI_MODE_CONTINUOUS, (uint32_t)buff, GetSize(CameraCurrentResolution));
}

/**
  * @brief  Starts the camera capture in snapshot mode.
  * @param  buff: pointer to the camera output buffer
  * @retval None
  */
void BSP_CAMERA_SnapshotStart(uint8_t *buff)
{
  /* Start the camera capture */
  HAL_DCMI_Start_DMA(&hDcmiHandler, DCMI_MODE_SNAPSHOT, (uint32_t)buff, GetSize(CameraCurrentResolution));
}

/**
  * @brief Suspend the CAMERA capture
  * @retval None
  */
void BSP_CAMERA_Suspend(void)
{
  /* Suspend the Camera Capture */
  HAL_DCMI_Suspend(&hDcmiHandler);
}

/**
  * @brief Resume the CAMERA capture
  * @retval None
  */
void BSP_CAMERA_Resume(void)
{
  /* Start the Camera Capture */
  HAL_DCMI_Resume(&hDcmiHandler);
}

/**
  * @brief  Stop the CAMERA capture
  * @retval Camera status
  */
uint8_t BSP_CAMERA_Stop(void)
{
  uint8_t status = CAMERA_ERROR;

  if(HAL_DCMI_Stop(&hDcmiHandler) == HAL_OK)
  {
     status = CAMERA_OK;
  }

  return status;
}

/**
  * @brief  CANERA power up
  * @retval None
  */
void BSP_CAMERA_PwrUp(void)
{
  /* De-assert the camera POWER_DOWN pin (active high) */
  BSP_IO_WritePin(CAMERA_PWR_EN_PIN, GPIO_PIN_RESET);

  HAL_Delay(3);     /* POWER_DOWN de-asserted during 3ms */
}

/**
  * @brief  CAMERA power down
  * @retval None
  */
void BSP_CAMERA_PwrDown(void)
{
  /* Assert the camera POWER_DOWN pin (active high) */
  BSP_IO_WritePin(CAMERA_PWR_EN_PIN, GPIO_PIN_SET);
}

/**
  * @brief  Configures the camera contrast and brightness.
  * @param  contrast_level: Contrast level
  *          This parameter can be one of the following values:
  *            @arg  CAMERA_CONTRAST_LEVEL4: for contrast +2
  *            @arg  CAMERA_CONTRAST_LEVEL3: for contrast +1
  *            @arg  CAMERA_CONTRAST_LEVEL2: for contrast  0
  *            @arg  CAMERA_CONTRAST_LEVEL1: for contrast -1
  *            @arg  CAMERA_CONTRAST_LEVEL0: for contrast -2
  * @param  brightness_level: Contrast level
  *          This parameter can be one of the following values:
  *            @arg  CAMERA_BRIGHTNESS_LEVEL4: for brightness +2
  *            @arg  CAMERA_BRIGHTNESS_LEVEL3: for brightness +1
  *            @arg  CAMERA_BRIGHTNESS_LEVEL2: for brightness  0
  *            @arg  CAMERA_BRIGHTNESS_LEVEL1: for brightness -1
  *            @arg  CAMERA_BRIGHTNESS_LEVEL0: for brightness -2
  * @retval None
  */
void BSP_CAMERA_ContrastBrightnessConfig(uint32_t contrast_level, uint32_t brightness_level)
{
  if(camera_drv->Config != NULL)
  {
    camera_drv->Config(CameraHwAddress, CAMERA_CONTRAST_BRIGHTNESS, contrast_level, brightness_level);
  }
}

/**
  * @brief  Configures the camera white balance.
  * @param  Mode: black_white mode
  *          This parameter can be one of the following values:
  *            @arg  CAMERA_BLACK_WHITE_BW
  *            @arg  CAMERA_BLACK_WHITE_NEGATIVE
  *            @arg  CAMERA_BLACK_WHITE_BW_NEGATIVE
  *            @arg  CAMERA_BLACK_WHITE_NORMAL
  * @retval None
  */
void BSP_CAMERA_BlackWhiteConfig(uint32_t Mode)
{
  if(camera_drv->Config != NULL)
  {
    camera_drv->Config(CameraHwAddress, CAMERA_BLACK_WHITE, Mode, 0);
  }
}

/**
  * @brief  Configures the camera color effect.
  * @param  Effect: Color effect
  *          This parameter can be one of the following values:
  *            @arg  CAMERA_COLOR_EFFECT_ANTIQUE
  *            @arg  CAMERA_COLOR_EFFECT_BLUE
  *            @arg  CAMERA_COLOR_EFFECT_GREEN
  *            @arg  CAMERA_COLOR_EFFECT_RED
  * @retval None
  */
void BSP_CAMERA_ColorEffectConfig(uint32_t Effect)
{
  if(camera_drv->Config != NULL)
  {
    camera_drv->Config(CameraHwAddress, CAMERA_COLOR_EFFECT, Effect, 0);
  }
}

/**
  * @brief  Get the capture size in pixels unit.
  * @param  resolution: the current resolution.
  * @retval capture size in pixels unit.
  */
static uint32_t GetSize(uint32_t resolution)
{
  uint32_t size = 0;

  /* Get capture size */
  switch (resolution)
  {
  case CAMERA_R160x120:
    {
      size =  0x2580;
    }
    break;
  case CAMERA_R320x240:
    {
      size =  0x9600;
    }
    break;
  case CAMERA_R480x272:
    {
      size =  0xFF00;
    }
    break;
  case CAMERA_R640x480:
    {
      size =  0x25800;
    }
    break;
  default:
    {
      break;
    }
  }

  return size;
}

/**
  * @brief  Initializes the DCMI MSP.
  * @param  hdcmi: HDMI handle
  * @param  Params
  * @retval None
  */
__weak void BSP_CAMERA_MspInit(DCMI_HandleTypeDef *hdcmi, void *Params)
{
  static DMA_HandleTypeDef hdma_handler;
  GPIO_InitTypeDef gpio_init_structure;

  /*** Enable peripherals and GPIO clocks ***/
  /* Enable DCMI clock */
  __HAL_RCC_DCMI_CLK_ENABLE();

  /* Enable DMA2 clock */
  __HAL_RCC_DMA2_CLK_ENABLE();
  /* Enable DMAmux1 clock to be able to use DMA_REQUEST_DCMI */
  __HAL_RCC_DMAMUX1_CLK_ENABLE();

  /* Enable GPIO clocks */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOI_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_4); /* PA8 Camera modul input clock 20 MHz */
  __HAL_RCC_HSI48_ENABLE();
  HAL_Delay(10); // HSI48 should start in 10ms

  /*** Configure the GPIO ***/
  /* Configure DCMI GPIO as alternate function */
  gpio_init_structure.Pin       = GPIO_PIN_6 | GPIO_PIN_7;
  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
  gpio_init_structure.Pull      = GPIO_NOPULL;
  gpio_init_structure.Speed     = GPIO_SPEED_HIGH;
  gpio_init_structure.Alternate = GPIO_AF10_DCMI;
  HAL_GPIO_Init(GPIOC, &gpio_init_structure);

  gpio_init_structure.Pin       = GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_5;
  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
  gpio_init_structure.Pull      = GPIO_NOPULL;
  gpio_init_structure.Speed     = GPIO_SPEED_HIGH;
  gpio_init_structure.Alternate = GPIO_AF10_DCMI;
  HAL_GPIO_Init(GPIOH, &gpio_init_structure);

  gpio_init_structure.Pin       = GPIO_PIN_4;
  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
  gpio_init_structure.Pull      = GPIO_NOPULL;
  gpio_init_structure.Speed     = GPIO_SPEED_HIGH;
  gpio_init_structure.Alternate = GPIO_AF10_DCMI;
  HAL_GPIO_Init(GPIOE, &gpio_init_structure);

  gpio_init_structure.Pin       = GPIO_PIN_4 | GPIO_PIN_7 | GPIO_PIN_5;
  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
  gpio_init_structure.Pull      = GPIO_NOPULL;
  gpio_init_structure.Speed     = GPIO_SPEED_HIGH;
  gpio_init_structure.Alternate = GPIO_AF10_DCMI;
  HAL_GPIO_Init(GPIOI, &gpio_init_structure);

  gpio_init_structure.Pin       = GPIO_PIN_4;
  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
  gpio_init_structure.Pull      = GPIO_NOPULL;
  gpio_init_structure.Speed     = GPIO_SPEED_HIGH;
  gpio_init_structure.Alternate = GPIO_AF10_DCMI;
  HAL_GPIO_Init(GPIOA, &gpio_init_structure);

  /*** Configure the DMA ***/
  /* Set the parameters to be configured */
  hdma_handler.Instance                 = BSP_CAMERA_DMA_INSTANCE;

  hdma_handler.Init.Request             = DMA_REQUEST_DCMI;
  hdma_handler.Init.Direction           = DMA_PERIPH_TO_MEMORY;
  hdma_handler.Init.PeriphInc           = DMA_PINC_DISABLE;
  hdma_handler.Init.MemInc              = DMA_MINC_ENABLE;      /* Image captured by the DCMI is stored in memory */
  hdma_handler.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  hdma_handler.Init.MemDataAlignment    = DMA_MDATAALIGN_WORD;
  hdma_handler.Init.Mode                = DMA_CIRCULAR;
  hdma_handler.Init.Priority            = DMA_PRIORITY_HIGH;

  /* Associate the initialized DMA handle to the DCMI handle */
  __HAL_LINKDMA(hdcmi, DMA_Handle, hdma_handler);

  /*** Configure the NVIC for DCMI and DMA ***/
  /* NVIC configuration for DCMI transfer complete interrupt */
  HAL_NVIC_SetPriority(DCMI_IRQn, 0x0F, 0);
  HAL_NVIC_EnableIRQ(DCMI_IRQn);

  /* NVIC configuration for DMA2D transfer complete interrupt */
  HAL_NVIC_SetPriority(DMA2_Channel6_IRQn, 0x0F, 0);
  HAL_NVIC_EnableIRQ(DMA2_Channel6_IRQn);

  /* Configure the DMA stream */
  HAL_DMA_Init(hdcmi->DMA_Handle);
}


/**
  * @brief  DeInitializes the DCMI MSP.
  * @param  hdcmi: HDMI handle
  * @param  Params
  * @retval None
  */
__weak void BSP_CAMERA_MspDeInit(DCMI_HandleTypeDef *hdcmi, void *Params)
{
  /* Disable NVIC  for DCMI transfer complete interrupt */
  HAL_NVIC_DisableIRQ(DCMI_IRQn);

  /* Disable NVIC for DMA2 transfer complete interrupt */
  HAL_NVIC_DisableIRQ(DMA2_Channel6_IRQn);

  /* Configure the DMA stream */
  HAL_DMA_DeInit(hdcmi->DMA_Handle);

  /* Disable DCMI clock */
  __HAL_RCC_DCMI_CLK_DISABLE();

  /* GPIO pins clock and DMA clock can be shut down in the application
     by surcharging this __weak function */
}

/**
  * @brief  Line event callback
  * @param  hdcmi: pointer to the DCMI handle
  * @retval None
  */
void HAL_DCMI_LineEventCallback(DCMI_HandleTypeDef *hdcmi)
{
  BSP_CAMERA_LineEventCallback();
}

/**
  * @brief  Line Event callback.
  * @retval None
  */
__weak void BSP_CAMERA_LineEventCallback(void)
{
  /* NOTE : This function should not be modified; when the callback is needed,
            the BSP_CAMERA_LineEventCallback can be implemented in the user file
   */
}

/**
  * @brief  VSYNC event callback
  * @param  hdcmi: pointer to the DCMI handle
  * @retval None
  */
void HAL_DCMI_VsyncEventCallback(DCMI_HandleTypeDef *hdcmi)
{
  BSP_CAMERA_VsyncEventCallback();
}

/**
  * @brief  VSYNC Event callback.
  * @retval None
  */
__weak void BSP_CAMERA_VsyncEventCallback(void)
{
  /* NOTE : This function should not be modified; when the callback is needed,
            the BSP_CAMERA_VsyncEventCallback can be implemented in the user file
   */
}

/**
  * @brief  Frame event callback
  * @param  hdcmi: pointer to the DCMI handle
  * @retval None
  */
void HAL_DCMI_FrameEventCallback(DCMI_HandleTypeDef *hdcmi)
{
  BSP_CAMERA_FrameEventCallback();
}

/**
  * @brief  Frame Event callback.
  * @retval None
  */
__weak void BSP_CAMERA_FrameEventCallback(void)
{
  /* NOTE : This function should not be modified; when the callback is needed,
            the BSP_CAMERA_FrameEventCallback can be implemented in the user file
   */
}

/**
  * @brief  Error callback
  * @param  hdcmi: pointer to the DCMI handle
  * @retval None
  */
void HAL_DCMI_ErrorCallback(DCMI_HandleTypeDef *hdcmi)
{
  BSP_CAMERA_ErrorCallback();
}

/**
  * @brief  Error callback.
  * @retval None
  */
__weak void BSP_CAMERA_ErrorCallback(void)
{
  /* NOTE : This function should not be modified; when the callback is needed,
            the BSP_CAMERA_ErrorCallback can be implemented in the user file
   */
}


/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/