STM32F767 摄像头OV5640

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已于 2022-12-01 22:46:02 修改

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分类专栏： STM32 文章标签： stm32

于 2022-11-16 21:28:24 首次发布

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/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2021 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
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

#include "delay.h"
#include "bsp_printf.h"
#include "bsp_key.h"
#include "string.h"
#include "usmart.h"
#include "usart.h"
#include "bsp_lcd.h"
//#include "bsp_pcf8574.h"
//#include "bsp_ap3216c.h"
//#include "bsp_adc.h"
//#include "bsp_touchs.h"
//#include "bsp_remote.h"
#include "bsp_flash.h"
#include "bsp_ov5640.h"

/* 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 ---------------------------------------------------------*/

DCMI_HandleTypeDef hdcmi;
DMA_HandleTypeDef hdma_dcmi;

I2C_HandleTypeDef hi2c2;

LTDC_HandleTypeDef hltdc;

SDRAM_HandleTypeDef hsdram1;

/* USER CODE BEGIN PV */

uint16_t FBuffer[LCD_WIDTH*LCD_HEIGHT] __attribute__((at(0xC0000000))); 
uint32_t POINT_COLOR;		//画笔颜色
uint32_t BACK_COLOR;  	//背景色 

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_FMC_Init(void);
static void MX_DMA_Init(void);
static void MX_DCMI_Init(void);
static void MX_LTDC_Init(void);
static void MX_I2C2_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

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

static void Sdram_SendCommand(uint32_t CommandMode, uint32_t CommandTarget, uint32_t AutoRefreshNumber, uint32_t ModeRegisterDefinition)
{
	FMC_SDRAM_CommandTypeDef Command;
	
	Command.AutoRefreshNumber = AutoRefreshNumber;
	Command.CommandMode = CommandMode;
	Command.CommandTarget = CommandTarget;
	Command.ModeRegisterDefinition = ModeRegisterDefinition;
	
	HAL_SDRAM_SendCommand(&hsdram1, &Command, 0);
}

static void Sdram_Init_Sequence(void)
{
	uint32_t ModeRegisterDefinition;
//	uint16_t Mode_WB;
//	uint16_t Mode_Op;
//	uint16_t Mode_CasLatency;
//	uint16_t Mode_Bt;
//	uint16_t Mode_BurstLength;
	
	Sdram_SendCommand(FMC_SDRAM_CMD_CLK_ENABLE, FMC_SDRAM_CMD_TARGET_BANK1, 0, 0);
	
	delay_us(200);
	
	Sdram_SendCommand(FMC_SDRAM_CMD_PALL, FMC_SDRAM_CMD_TARGET_BANK1, 0, 0);
	
	Sdram_SendCommand(FMC_SDRAM_CMD_AUTOREFRESH_MODE, FMC_SDRAM_CMD_TARGET_BANK1, 1, 0);
	
	//SDRAM????2?êy
	#define SDRAM_MODEREG_BURST_LENGTH_1             ((uint16_t)0x0000)
	#define SDRAM_MODEREG_BURST_LENGTH_2             ((uint16_t)0x0001)
	#define SDRAM_MODEREG_BURST_LENGTH_4             ((uint16_t)0x0002)
	#define SDRAM_MODEREG_BURST_LENGTH_8             ((uint16_t)0x0004)
	#define SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL      ((uint16_t)0x0000)
	#define SDRAM_MODEREG_BURST_TYPE_INTERLEAVED     ((uint16_t)0x0008)
	#define SDRAM_MODEREG_CAS_LATENCY_2              ((uint16_t)0x0020)
	#define SDRAM_MODEREG_CAS_LATENCY_3              ((uint16_t)0x0030)
	#define SDRAM_MODEREG_OPERATING_MODE_STANDARD    ((uint16_t)0x0000)
	#define SDRAM_MODEREG_WRITEBURST_MODE_PROGRAMMED ((uint16_t)0x0000)
	#define SDRAM_MODEREG_WRITEBURST_MODE_SINGLE     ((uint16_t)0x0200)

	ModeRegisterDefinition=(uint32_t)SDRAM_MODEREG_BURST_LENGTH_1          |	
              SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL   |	
              SDRAM_MODEREG_CAS_LATENCY_3           |	
              SDRAM_MODEREG_OPERATING_MODE_STANDARD |   
              SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;     

	Sdram_SendCommand(FMC_SDRAM_CMD_LOAD_MODE, FMC_SDRAM_CMD_TARGET_BANK1, 1, ModeRegisterDefinition);
	
	HAL_SDRAM_ProgramRefreshRate(&hsdram1, 824);
}

//清空屏幕并在右上角显示"RST"
void Load_Drow_Dialog(void)
{
	LTDC_Clear(WHITE);//清屏   
	POINT_COLOR=BLUE;//设置字体为蓝色 
	LCD_ShowString(lcddev.width-24,0,200,16,16,"RST");//显示清屏区域
	POINT_COLOR=RED;//设置画笔蓝色 
}

//电容触摸屏专有部分
//画水平线
//x0,y0:坐标
//len:线长度
//color:颜色
void gui_draw_hline(uint16_t x0, uint16_t y0, uint16_t len, uint16_t color)
{
	if(len==0)return;
	LCD_Fill(x0,y0,x0+len-1,y0,color);	
}

//画实心圆
//x0,y0:坐标
//r:半径
//color:颜色
void gui_fill_circle(uint16_t x0, uint16_t y0, uint16_t r, uint16_t color)
{											  
	uint32_t i;
	uint32_t imax = ((uint32_t)r*707)/1000+1;
	uint32_t sqmax = (uint32_t)r*(uint32_t)r+(uint32_t)r/2;
	uint32_t x=r;
	gui_draw_hline(x0-r,y0,2*r,color);
	for (i=1;i<=imax;i++) 
	{
		if ((i*i+x*x)>sqmax)// draw lines from outside  
		{
 			if (x>imax) 
			{
				gui_draw_hline (x0-i+1,y0+x,2*(i-1),color);
				gui_draw_hline (x0-i+1,y0-x,2*(i-1),color);
			}
			x--;
		}
		// draw lines from inside (center)  
		gui_draw_hline(x0-x,y0+i,2*x,color);
		gui_draw_hline(x0-x,y0-i,2*x,color);
	}
}  

//画一条粗线
//(x1,y1),(x2,y2):线条的起始坐标
//size：线条的粗细程度
//color：线条的颜色
void lcd_draw_bline(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t size, uint16_t color)
{
	uint16_t t; 
	int xerr=0,yerr=0,delta_x,delta_y,distance; 
	int incx,incy,uRow,uCol; 
	if(x1<size|| x2<size||y1<size|| y2<size)return; 
	delta_x=x2-x1; //计算坐标增量 
	delta_y=y2-y1; 
	uRow=x1; 
	uCol=y1; 
	if(delta_x>0)incx=1; //设置单步方向 
	else if(delta_x==0)incx=0;//垂直线 
	else {incx=-1;delta_x=-delta_x;} 
	if(delta_y>0)incy=1; 
	else if(delta_y==0)incy=0;//水平线 
	else{incy=-1;delta_y=-delta_y;} 
	if( delta_x>delta_y)distance=delta_x; //选取基本增量坐标轴 
	else distance=delta_y; 
	for(t=0;t<=distance+1;t++ )//画线输出 
	{  
		gui_fill_circle(uRow,uCol,size,color);//画点 
		xerr+=delta_x ; 
		yerr+=delta_y ; 
		if(xerr>distance) 
		{ 
			xerr-=distance; 
			uRow+=incx; 
		} 
		if(yerr>distance) 
		{ 
			yerr-=distance; 
			uCol+=incy; 
		} 
	}  
}   

//10个触控点的颜色(电容触摸屏用)												 
const uint16_t POINT_COLOR_TBL[10]={RED,GREEN,BLUE,BROWN,GRED,BRED,GBLUE,LIGHTBLUE,BRRED,GRAY};   

/* 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_FMC_Init();
  MX_DMA_Init();
  MX_DCMI_Init();
  MX_LTDC_Init();
  MX_I2C2_Init();
  /* USER CODE BEGIN 2 */
	
	uart_init(115200);		        //串口初始化 
	usmart_dev.init(108); 		    //初始化USMART	
	LCD_Set_Dir(1);
	
	delay_init(216);
	delay_ms(5000);
	
	HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);
	HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
	
	Sdram_Init_Sequence();
	
	POINT_COLOR=RED;
	BACK_COLOR=WHITE;
	LTDC_Clear(WHITE);
	
	POINT_COLOR=RED;//设置字体为红色 
	LCD_ShowString(30,50,200,16,16,"Apollo STM32F4/F7");	
	LCD_ShowString(30,70,200,16,16,"OV5640 TEST");	
	LCD_ShowString(30,90,200,16,16,"ATOM@ALIENTEK");
	LCD_ShowString(30,110,200,16,16,"2016/7/15");  	 
	while(OV5640_Init())//初始化OV5640
	{
		LCD_ShowString(30,130,240,16,16,"OV5640 ERR");
		delay_ms(200);
		LCD_Fill(30,130,239,170,WHITE);
		delay_ms(200);
		HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);
	}	
	LCD_ShowString(30,130,200,16,16,"OV5640 OK");  
	
	rgb565_test();

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
		
		
    /* 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};
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

  /** Configure LSE Drive Capability
  */
  HAL_PWR_EnableBkUpAccess();
  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 432;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 9;
  RCC_OscInitStruct.PLL.PLLR = 2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Activate the Over-Drive mode
  */
  if (HAL_PWREx_EnableOverDrive() != 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_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LTDC|RCC_PERIPHCLK_I2C2;
  PeriphClkInitStruct.PLLSAI.PLLSAIN = 288;
  PeriphClkInitStruct.PLLSAI.PLLSAIR = 4;
  PeriphClkInitStruct.PLLSAI.PLLSAIQ = 4;
  PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV2;
  PeriphClkInitStruct.PLLSAIDivQ = 1;
  PeriphClkInitStruct.PLLSAIDivR = RCC_PLLSAIDIVR_8;
  PeriphClkInitStruct.I2c2ClockSelection = RCC_I2C2CLKSOURCE_PCLK1;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Enables the Clock Security System
  */
  HAL_RCC_EnableCSS();
}

/**
  * @brief DCMI Initialization Function
  * @param None
  * @retval None
  */
static void MX_DCMI_Init(void)
{

  /* USER CODE BEGIN DCMI_Init 0 */

  /* USER CODE END DCMI_Init 0 */

  /* USER CODE BEGIN DCMI_Init 1 */

  /* USER CODE END DCMI_Init 1 */
  hdcmi.Instance = DCMI;
  hdcmi.Init.SynchroMode = DCMI_SYNCHRO_HARDWARE;
  hdcmi.Init.PCKPolarity = DCMI_PCKPOLARITY_RISING;
  hdcmi.Init.VSPolarity = DCMI_VSPOLARITY_LOW;
  hdcmi.Init.HSPolarity = DCMI_HSPOLARITY_LOW;
  hdcmi.Init.CaptureRate = DCMI_CR_ALL_FRAME;
  hdcmi.Init.ExtendedDataMode = DCMI_EXTEND_DATA_8B;
  hdcmi.Init.JPEGMode = DCMI_JPEG_DISABLE;
  hdcmi.Init.ByteSelectMode = DCMI_BSM_ALL;
  hdcmi.Init.ByteSelectStart = DCMI_OEBS_ODD;
  hdcmi.Init.LineSelectMode = DCMI_LSM_ALL;
  hdcmi.Init.LineSelectStart = DCMI_OELS_ODD;
  if (HAL_DCMI_Init(&hdcmi) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN DCMI_Init 2 */
	
	__HAL_DCMI_ENABLE_IT(&hdcmi, DCMI_IT_FRAME);

  /* USER CODE END DCMI_Init 2 */

}

/**
  * @brief I2C2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_I2C2_Init(void)
{

  /* USER CODE BEGIN I2C2_Init 0 */

  /* USER CODE END I2C2_Init 0 */

  /* USER CODE BEGIN I2C2_Init 1 */

  /* USER CODE END I2C2_Init 1 */
  hi2c2.Instance = I2C2;
  hi2c2.Init.Timing = 0x40D32A31;
  hi2c2.Init.OwnAddress1 = 0;
  hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c2.Init.OwnAddress2 = 0;
  hi2c2.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
  hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c2) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure Analogue filter
  */
  if (HAL_I2CEx_ConfigAnalogFilter(&hi2c2, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure Digital filter
  */
  if (HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN I2C2_Init 2 */

  /* USER CODE END I2C2_Init 2 */

}

/**
  * @brief LTDC Initialization Function
  * @param None
  * @retval None
  */
static void MX_LTDC_Init(void)
{

  /* USER CODE BEGIN LTDC_Init 0 */

  /* USER CODE END LTDC_Init 0 */

  LTDC_LayerCfgTypeDef pLayerCfg = {0};

  /* USER CODE BEGIN LTDC_Init 1 */

  /* USER CODE END LTDC_Init 1 */
  hltdc.Instance = LTDC;
  hltdc.Init.HSPolarity = LTDC_HSPOLARITY_AL;
  hltdc.Init.VSPolarity = LTDC_VSPOLARITY_AL;
  hltdc.Init.DEPolarity = LTDC_DEPOLARITY_AL;
  hltdc.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
  hltdc.Init.HorizontalSync = 0;
  hltdc.Init.VerticalSync = 0;
  hltdc.Init.AccumulatedHBP = 40;
  hltdc.Init.AccumulatedVBP = 8;
  hltdc.Init.AccumulatedActiveW = 520;
  hltdc.Init.AccumulatedActiveH = 280;
  hltdc.Init.TotalWidth = 525;
  hltdc.Init.TotalHeigh = 288;
  hltdc.Init.Backcolor.Blue = 0;
  hltdc.Init.Backcolor.Green = 0;
  hltdc.Init.Backcolor.Red = 0;
  if (HAL_LTDC_Init(&hltdc) != HAL_OK)
  {
    Error_Handler();
  }
  pLayerCfg.WindowX0 = 0;
  pLayerCfg.WindowX1 = 480;
  pLayerCfg.WindowY0 = 0;
  pLayerCfg.WindowY1 = 272;
  pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
  pLayerCfg.Alpha = 255;
  pLayerCfg.Alpha0 = 0;
  pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
  pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
  pLayerCfg.FBStartAdress = 0xc0000000;
  pLayerCfg.ImageWidth = 480;
  pLayerCfg.ImageHeight = 272;
  pLayerCfg.Backcolor.Blue = 0;
  pLayerCfg.Backcolor.Green = 0;
  pLayerCfg.Backcolor.Red = 0;
  if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg, 0) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN LTDC_Init 2 */

  /* USER CODE END LTDC_Init 2 */

}

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

  /* DMA controller clock enable */
  __HAL_RCC_DMA2_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA2_Stream1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA2_Stream1_IRQn, 1, 0);
  HAL_NVIC_EnableIRQ(DMA2_Stream1_IRQn);

}

/* FMC initialization function */
static void MX_FMC_Init(void)
{

  /* USER CODE BEGIN FMC_Init 0 */

  /* USER CODE END FMC_Init 0 */

  FMC_SDRAM_TimingTypeDef SdramTiming = {0};

  /* USER CODE BEGIN FMC_Init 1 */

  /* USER CODE END FMC_Init 1 */

  /** Perform the SDRAM1 memory initialization sequence
  */
  hsdram1.Instance = FMC_SDRAM_DEVICE;
  /* hsdram1.Init */
  hsdram1.Init.SDBank = FMC_SDRAM_BANK1;
  hsdram1.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_9;
  hsdram1.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_13;
  hsdram1.Init.MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_16;
  hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
  hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_3;
  hsdram1.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
  hsdram1.Init.SDClockPeriod = FMC_SDRAM_CLOCK_PERIOD_2;
  hsdram1.Init.ReadBurst = FMC_SDRAM_RBURST_ENABLE;
  hsdram1.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_0;
  /* SdramTiming */
  SdramTiming.LoadToActiveDelay = 2;
  SdramTiming.ExitSelfRefreshDelay = 8;
  SdramTiming.SelfRefreshTime = 4;
  SdramTiming.RowCycleDelay = 7;
  SdramTiming.WriteRecoveryTime = 3;
  SdramTiming.RPDelay = 2;
  SdramTiming.RCDDelay = 2;

  if (HAL_SDRAM_Init(&hsdram1, &SdramTiming) != HAL_OK)
  {
    Error_Handler( );
  }

  /* USER CODE BEGIN FMC_Init 2 */

  /* USER CODE END FMC_Init 2 */
}

/**
  * @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_GPIOI_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOG_CLK_ENABLE();
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOI, GPIO_PIN_8|GPIO_PIN_3, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_3|GPIO_PIN_4
                          |GPIO_PIN_5, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOH, GPIO_PIN_6, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_RESET);

  /*Configure GPIO pin : PI8 */
  GPIO_InitStruct.Pin = GPIO_PIN_8;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);

  /*Configure GPIO pin : PC13 */
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pin : PA0 */
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLDOWN;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : PH2 PH3 PH7 */
  GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_7;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);

  /*Configure GPIO pins : PB0 PB1 */
  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : PH6 */
  GPIO_InitStruct.Pin = GPIO_PIN_6;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);

  /*Configure GPIO pin : PB12 */
  GPIO_InitStruct.Pin = GPIO_PIN_12;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : PI3 */
  GPIO_InitStruct.Pin = GPIO_PIN_3;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);

  /*Configure GPIO pin : PA15 */
  GPIO_InitStruct.Pin = GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : PB3 PB4 */
  GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : PB5 */
  GPIO_InitStruct.Pin = GPIO_PIN_5;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/* 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 */

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

#include "bsp_dcmi.h"
#include "bsp_ov5640.h"
#include "bsp_lcd.h"

uint16_t dcmi_line_buf[2][2592];	//RGB屏时,摄像头采用一行一行读取,定义行缓存  

void BSP_OV5640_M0_RX_Callback(DMA_HandleTypeDef *hdma)
{
	uint16_t *pbuf;
	uint16_t i;

	pbuf=(uint16_t*)dcmi_line_buf[0]; 
	
//	for(i=0; i<lcddev.width; i++)
//	{
//		LTDC_Draw_Point(i, curline, pbuf[i]);
//	}
	
	LTDC_Color_Fill(0,curline,lcddev.width-1,curline,pbuf);//DM2D填充  
	if(curline<lcddev.height)curline++;
}

void BSP_OV5640_M1_RX_Callback(DMA_HandleTypeDef *hdma)
{
	uint16_t *pbuf;
	uint16_t i;

	pbuf=(uint16_t*)dcmi_line_buf[1]; 

//	for(i=0; i<lcddev.width; i++)
//	{
//		LTDC_Draw_Point(i, curline, pbuf[i]);
//	}
	
	LTDC_Color_Fill(0,curline,lcddev.width-1,curline,pbuf);//DM2D填充 
	if(curline<lcddev.height)curline++;
}

/**
  * @brief  Enables DCMI DMA request and enables DCMI capture
  * @param  hdcmi     pointer to a DCMI_HandleTypeDef structure that contains
  *                    the configuration information for DCMI.
  * @param  DCMI_Mode DCMI capture mode snapshot or continuous grab.
  * @param  pData     The destination memory Buffer address (LCD Frame buffer).
  * @param  Length    The length of capture to be transferred.
  * @retval HAL status
  */
HAL_StatusTypeDef BSP_DCMI_MultiBufferStart_DMA_IT(DCMI_HandleTypeDef *hdcmi, uint32_t DCMI_Mode)
{
  /* Check function parameters */
  assert_param(IS_DCMI_CAPTURE_MODE(DCMI_Mode));

  /* Process Locked */
  __HAL_LOCK(hdcmi);

  /* Lock the DCMI peripheral state */
  hdcmi->State = HAL_DCMI_STATE_BUSY;

  /* Enable DCMI by setting DCMIEN bit */
  __HAL_DCMI_ENABLE(hdcmi);

  /* Configure the DCMI Mode */
  hdcmi->Instance->CR &= ~(DCMI_CR_CM);
  hdcmi->Instance->CR |= (uint32_t)(DCMI_Mode);

  /* Set the DMA memory0 conversion complete callback */
  hdcmi->DMA_Handle->XferCpltCallback = NULL;

  /* Set the DMA error callback */
  hdcmi->DMA_Handle->XferErrorCallback = NULL;

  /* Set the dma abort callback */
  hdcmi->DMA_Handle->XferAbortCallback = NULL;

  /* Reset transfer counters value */
  hdcmi->XferCount = 0;
  hdcmi->XferTransferNumber = 0;
  hdcmi->XferSize = 0;
  hdcmi->pBuffPtr = 0;

	HAL_DMA_RegisterCallback(&hdma_dcmi, HAL_DMA_XFER_CPLT_CB_ID, BSP_OV5640_M0_RX_Callback);
	HAL_DMA_RegisterCallback(&hdma_dcmi, HAL_DMA_XFER_M1CPLT_CB_ID, BSP_OV5640_M1_RX_Callback);
	HAL_DMAEx_MultiBufferStart_IT(&hdma_dcmi, (uint32_t)&hdcmi->Instance->DR, (uint32_t)dcmi_line_buf[0], (uint32_t)dcmi_line_buf[1], lcddev.width/2);

  /* Enable Capture */
  hdcmi->Instance->CR |= DCMI_CR_CAPTURE;

  /* Release Lock */
  __HAL_UNLOCK(hdcmi);

  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  Frame Event callback.
  * @param  hdcmi pointer to a DCMI_HandleTypeDef structure that contains
  *                the configuration information for DCMI.
  * @retval None
  */
//void HAL_DCMI_FrameEventCallback(DCMI_HandleTypeDef *hdcmi)
//{
//	curline=yoffset;		//行数复位
//}

/**
  * @brief  VSYNC Event callback.
  * @param  hdcmi pointer to a DCMI_HandleTypeDef structure that contains
  *                the configuration information for DCMI.
  * @retval None
  */
void HAL_DCMI_VsyncEventCallback(DCMI_HandleTypeDef *hdcmi)
{
  curline=yoffset;		//行数复位
	__HAL_DCMI_ENABLE_IT(hdcmi, DCMI_IT_FRAME);
}

#include "bsp_lcd.h"
#include "bsp_font.h"

//管理LCD重要参数
//默认为竖屏
_lcd_dev lcddev;

//uint8_t lcd_dir = 0;//0:横屏、1：竖屏

//画点函数
//x,y:坐标
//color:颜色值
void LTDC_Draw_Point(uint16_t x,uint16_t y,uint32_t color)
{ 
	uint16_t dev_x, dev_y;
	
	if(lcddev.dir)//竖屏
	{
		dev_x = y;
		dev_y = LCD_HEIGHT - 1 - x;
	}
	else//横屏
	{
		dev_x = x;
		dev_y = y;
	}
	if((dev_y < LCD_HEIGHT) && (dev_x < LCD_WIDTH)) FBuffer[dev_y * LCD_WIDTH + dev_x]=color; 
}

//在指定位置显示一个字符
//x,y:起始坐标
//num:要显示的字符:" "--->"~"
//size:字体大小 12/16/24/32
//mode:叠加方式(1)还是非叠加方式(0)
void LCD_ShowChar(uint16_t x, uint16_t y, uint8_t num, uint8_t size, uint8_t mode)
{  							  
  uint8_t temp,t1,t;
	uint16_t y0=y;
	uint8_t csize=(size/8+((size%8)?1:0))*(size/2);		//得到字体一个字符对应点阵集所占的字节数	
 	num=num-' ';//得到偏移后的值（ASCII字库是从空格开始取模，所以-' '就是对应字符的字库）
	for(t=0;t<csize;t++)
	{   
		if(size==12)temp=asc2_1206[num][t]; 	 	//调用1206字体
		else if(size==16)temp=asc2_1608[num][t];	//调用1608字体
		else if(size==24)temp=asc2_2412[num][t];	//调用2412字体
		else if(size==32)temp=asc2_3216[num][t];	//调用3216字体
		else return;								//没有的字库
		for(t1=0;t1<8;t1++)
		{			    
			if(temp&0x80)LTDC_Draw_Point(x,y,POINT_COLOR);
			else if(mode==0)LTDC_Draw_Point(x,y,BACK_COLOR);
			temp<<=1;
			y++;
			if(y>=LCD_HEIGHT)return;		//超区域了
			if((y-y0)==size)
			{
				y=y0;
				x++;
				if(x>=LCD_WIDTH)return;	//超区域了
				break;
			}
		}  	 
	}  	    	   	 	  
}   

//显示字符串
//x,y:起点坐标
//width,height:区域大小  
//size:字体大小
//*p:字符串起始地址		  
void LCD_ShowString(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint8_t size, uint8_t *p)
{         
	uint8_t x0=x;
	width+=x;
	height+=y;
	while((*p<='~')&&(*p>=' '))//判断是不是非法字符!
	{       
		if(x>=width){x=x0;y+=size;}
		if(y>=height)break;//退出
		LCD_ShowChar(x,y,*p,size,0);
		x+=size/2;
		p++;
	}  
}

//LCD清屏
//color:颜色值
void LTDC_Clear(uint32_t color)
{
	if(lcddev.dir)//竖屏
	{
		LTDC_Fill(0,0,LCD_HEIGHT-1,LCD_WIDTH-1,color);
	}
	else//横屏
	{
		LTDC_Fill(0,0,LCD_WIDTH-1,LCD_HEIGHT-1,color);
	}
	
	
//	HAL_DMA2D_Start(&hdma2d, color, (uint32_t)FBuffer, LCD_WIDTH, LCD_HEIGHT); 
//	HAL_DMA2D_PollForTransfer(&hdma2d, 0X1FFFFF);
}

//(sx,sy),(ex,ey):填充矩形对角坐标,区域大小为:(ex-sx+1)*(ey-sy+1)   
//注意:sx,ex,不能大于lcddev.width-1;sy,ey,不能大于lcddev.height-1!!!
//color:要填充的颜色
void LTDC_Fill(uint16_t sx, uint16_t sy, uint16_t ex, uint16_t ey, uint32_t color)
{ 
 
	uint16_t i,j;
	for(j = sy; j <= ey; j++)
	{
		for(i = sx; i <= ex; i++)
		{
			LTDC_Draw_Point(i, j, color);
		}
	}
}

//显示数字,高位为0,则不显示
//x,y :起点坐标	 
//len :数字的位数
//size:字体大小
//color:颜色 
//num:数值(0~4294967295);	 
void LCD_ShowNum(uint16_t x,uint16_t y,uint32_t num,uint8_t len,uint8_t size)
{         	
	uint8_t t,temp;
	uint8_t enshow=0;						   
	for(t=0;t<len;t++)
	{
		temp=(num/LCD_Pow(10,len-t-1))%10;
		if(enshow==0&&t<(len-1))
		{
			if(temp==0)
			{
				LCD_ShowChar(x+(size/2)*t,y,' ',size,0);
				continue;
			}else enshow=1; 
		 	 
		}
	 	LCD_ShowChar(x+(size/2)*t,y,temp+'0',size,0); 
	}
} 

//显示数字,高位为0,还是显示
//x,y:起点坐标
//num:数值(0~999999999);	 
//len:长度(即要显示的位数)
//size:字体大小
//mode:
//[7]:0,不填充;1,填充0.
//[6:1]:保留
//[0]:0,非叠加显示;1,叠加显示.
void LCD_ShowxNum(uint16_t x, uint16_t y, uint32_t num, uint8_t len, uint8_t size, uint8_t mode)
{  
	uint8_t t,temp;
	uint8_t enshow=0;						   
	for(t=0;t<len;t++)
	{
		temp=(num/LCD_Pow(10,len-t-1))%10;
		if(enshow==0&&t<(len-1))
		{
			if(temp==0)
			{
				if(mode&0X80)LCD_ShowChar(x+(size/2)*t,y,'0',size,mode&0X01);  
				else LCD_ShowChar(x+(size/2)*t,y,' ',size,mode&0X01);  
 				continue;
			}else enshow=1; 
		 	 
		}
	 	LCD_ShowChar(x+(size/2)*t,y,temp+'0',size,mode&0X01); 
	}
}

//m^n函数
//返回值:m^n次方.
uint32_t LCD_Pow(uint8_t m,uint8_t n) 
{
	uint32_t result=1;	 
	while(n--)result*=m;    
	return result;
}	

//dir:0-横屏、1-竖屏
void LCD_Set_Dir(uint8_t dir)
{
	lcddev.dir = dir;
	
	if(dir == 0)
	{
		lcddev.width = LCD_WIDTH;
		lcddev.height = LCD_HEIGHT;
	}
	else
	{
		lcddev.width = LCD_HEIGHT;
		lcddev.height = LCD_WIDTH;
	}
}

//dir:0-横屏、1-竖屏
uint8_t Get_LCD_Dir(void)
{
	return lcddev.dir;
}

//画线
//x1,y1:起点坐标
//x2,y2:终点坐标  
void LCD_DrawLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
{
	uint16_t t; 
	int xerr=0,yerr=0,delta_x,delta_y,distance; 
	int incx,incy,uRow,uCol; 
	delta_x=x2-x1; //计算坐标增量 
	delta_y=y2-y1; 
	uRow=x1; 
	uCol=y1; 
	if(delta_x>0)incx=1; //设置单步方向 
	else if(delta_x==0)incx=0;//垂直线 
	else {incx=-1;delta_x=-delta_x;} 
	if(delta_y>0)incy=1; 
	else if(delta_y==0)incy=0;//水平线 
	else{incy=-1;delta_y=-delta_y;} 
	if( delta_x>delta_y)distance=delta_x; //选取基本增量坐标轴 
	else distance=delta_y; 
	for(t=0;t<=distance+1;t++ )//画线输出 
	{  
		LCD_DrawPoint(uRow,uCol);//画点 
		xerr+=delta_x ; 
		yerr+=delta_y ; 
		if(xerr>distance) 
		{ 
			xerr-=distance; 
			uRow+=incx; 
		} 
		if(yerr>distance) 
		{ 
			yerr-=distance; 
			uCol+=incy; 
		} 
	}  
}  

//画点
//x,y:坐标
//POINT_COLOR:此点的颜色
void LCD_DrawPoint(uint16_t x,uint16_t y)
{
	LTDC_Draw_Point(x,y,POINT_COLOR);
}

//在指定位置画一个指定大小的圆
//(x,y):中心点
//r    :半径
void LCD_Draw_Circle(uint16_t x0, uint16_t y0, uint8_t r)
{
	int a,b;
	int di;
	a=0;b=r;	  
	di=3-(r<<1);             //判断下个点位置的标志
	while(a<=b)
	{
		LCD_DrawPoint(x0+a,y0-b);             //5
 		LCD_DrawPoint(x0+b,y0-a);             //0           
		LCD_DrawPoint(x0+b,y0+a);             //4               
		LCD_DrawPoint(x0+a,y0+b);             //6 
		LCD_DrawPoint(x0-a,y0+b);             //1       
 		LCD_DrawPoint(x0-b,y0+a);             
		LCD_DrawPoint(x0-a,y0-b);             //2             
  	LCD_DrawPoint(x0-b,y0-a);             //7     	         
		a++;
		//使用Bresenham算法画圆     
		if(di<0)di +=4*a+6;	  
		else
		{
			di+=10+4*(a-b);   
			b--;
		} 						    
	}
} 

//在指定区域内填充单个颜色
//(sx,sy),(ex,ey):填充矩形对角坐标,区域大小为:(ex-sx+1)*(ey-sy+1)   
//color:要填充的颜色
void LCD_Fill(uint16_t sx, uint16_t sy, uint16_t ex, uint16_t ey, uint32_t color)
{ 
	LTDC_Fill(sx,sy,ex,ey,color);
}

//在指定区域内填充指定颜色块,DMA2D填充	
//此函数仅支持u16,RGB565格式的颜色数组填充.
//(sx,sy),(ex,ey):填充矩形对角坐标,区域大小为:(ex-sx+1)*(ey-sy+1)  
//注意:sx,ex,不能大于lcddev.width-1;sy,ey,不能大于lcddev.height-1!!!
//color:要填充的颜色数组首地址
void LTDC_Color_Fill(uint16_t sx,uint16_t sy,uint16_t ex,uint16_t ey,uint16_t *color)
{
	uint32_t psx,psy,pex,pey;	//以LCD面板为基准的坐标系,不随横竖屏变化而变化
	uint32_t timeout=0; 
	uint16_t offline;
	uint32_t addr; 
	//坐标系转换
	if(!lcddev.dir)	//横屏
	{
		psx=sx;psy=sy;
		pex=ex;pey=ey;
	}else			//竖屏
	{
		psx=sy;psy=LCD_HEIGHT-ex-1;
		pex=ey;pey=LCD_HEIGHT-sx-1;
	}
	offline=LCD_WIDTH-(pex-psx+1);
	addr=((uint32_t)FBuffer+2*(LCD_WIDTH*psy+psx)); 
	RCC->AHB1ENR|=1<<23;			//使能DM2D时钟
	DMA2D->CR=0<<16;				//存储器到存储器模式
	DMA2D->FGPFCCR=0X02;	//设置颜色格式
	DMA2D->FGOR=0;					//前景层行偏移为0
	DMA2D->OOR=offline;				//设置行偏移 
	DMA2D->CR&=~(1<<0);				//先停止DMA2D
	DMA2D->FGMAR=(uint32_t)color;		//源地址
	DMA2D->OMAR=addr;				//输出存储器地址
	DMA2D->NLR=(pey-psy+1)|((pex-psx+1)<<16);	//设定行数寄存器 
	DMA2D->CR|=1<<0;				//启动DMA2D
	while((DMA2D->ISR&(1<<1))==0)	//等待传输完成
	{
		timeout++;
		if(timeout>0X1FFFFF)break;	//超时退出
	} 
	DMA2D->IFCR|=1<<1;				//清除传输完成标志  	
}

#include "bsp_sccb.h"
#include "delay.h"

void SCCB_Delay(void)
{
	delay_us(5);
}

//初始化SCCB接口
void SCCB_Init(void)
{

}

//SCCB起始信号
//当时钟为高的时候,数据线的高到低,为SCCB起始信号
//在激活状态下,SDA和SCL均为低电平
void SCCB_Start(void)
{
	SCCB_SDA(1);     //数据线高电平	   
	SCCB_SCL(1);	    //在时钟线高的时候数据线由高至低
	SCCB_Delay();  
	SCCB_SDA(0);
	SCCB_Delay();	 
	SCCB_SCL(0);	    //数据线恢复低电平，单操作函数必要	  
}

//SCCB停止信号
//当时钟为高的时候,数据线的低到高,为SCCB停止信号
//空闲状况下,SDA,SCL均为高电平
void SCCB_Stop(void)
{
	SCCB_SDA(0);
	SCCB_Delay();	 
	SCCB_SCL(1);	
	SCCB_Delay(); 
	SCCB_SDA(1);	
	SCCB_Delay();
}  
//产生NA信号
void SCCB_No_Ack(void)
{
	SCCB_Delay();
	SCCB_SDA(1);	
	SCCB_SCL(1);	
	SCCB_Delay();
	SCCB_SCL(0);	
	SCCB_Delay();
	SCCB_SDA(0);	
	SCCB_Delay();
}
//SCCB,写入一个字节
//返回值:0,成功;1,失败. 
uint8_t SCCB_WR_Byte(uint8_t dat)
{
	uint8_t j,res;	 
	for(j=0;j<8;j++) //循环8次发送数据
	{
		if(dat&0x80)SCCB_SDA(1);	
		else SCCB_SDA(0);
		dat<<=1;
		SCCB_Delay();
		SCCB_SCL(1);	
		SCCB_Delay();
		SCCB_SCL(0);		   
	}			 
	SCCB_SDA_IN();		//设置SDA为输入 
	SCCB_Delay();
	SCCB_SCL(1);			//接收第九位,以判断是否发送成功
	SCCB_Delay();
	if(SCCB_READ_SDA)res=1;  //SDA=1发送失败，返回1
	else res=0;         //SDA=0发送成功，返回0
	SCCB_SCL(0);		 
	SCCB_SDA_OUT();		//设置SDA为输出    
	return res;  
}	 
//SCCB 读取一个字节
//在SCL的上升沿,数据锁存
//返回值:读到的数据
uint8_t SCCB_RD_Byte(void)
{
	uint8_t temp=0,j;    
	SCCB_SDA_IN();		//设置SDA为输入  
	for(j=8;j>0;j--) 	//循环8次接收数据
	{		     	  
		SCCB_Delay();
		SCCB_SCL(1);
		temp=temp<<1;
		if(SCCB_READ_SDA)temp++;   
		SCCB_Delay();
		SCCB_SCL(0);
	}	
	SCCB_SDA_OUT();		//设置SDA为输出    
	return temp;
}

#include "bsp_ov5640.h"
#include "bsp_sccb.h"
#include "bsp_pcf8574.h"
#include "delay.h"
#include "usart.h"
#include "bsp_ov5640cfg.h"
#include "bsp_ov5640af.h"
#include "bsp_lcd.h"
#include "bsp_key.h"
#include "bsp_dcmi.h"

//OV5640写寄存器
//返回值:0,成功;1,失败.
uint8_t OV5640_WR_Reg(uint16_t reg,uint8_t data)
{
	uint8_t res=0;
	SCCB_Start(); 					//启动SCCB传输
	if(SCCB_WR_Byte(OV5640_ADDR))res=1;	//写器件ID	  
	if(SCCB_WR_Byte(reg>>8))res=1;	//写寄存器高8位地址
	if(SCCB_WR_Byte(reg))res=1;		//写寄存器低8位地址		  
	if(SCCB_WR_Byte(data))res=1; 	//写数据	 
	SCCB_Stop();	  
	return	res;
}
//OV5640读寄存器
//返回值:读到的寄存器值
uint8_t OV5640_RD_Reg(uint16_t reg)
{
	uint8_t val=0;
	SCCB_Start(); 				//启动SCCB传输
	SCCB_WR_Byte(OV5640_ADDR);	//写器件ID
	SCCB_WR_Byte(reg>>8);	    //写寄存器高8位地址   
	SCCB_WR_Byte(reg);			//写寄存器低8位地址	  
	SCCB_Stop();   
	//设置寄存器地址后，才是读
	SCCB_Start();
	SCCB_WR_Byte(OV5640_ADDR|0X01);//发送读命令	  
	val=SCCB_RD_Byte();		 	//读取数据
	SCCB_No_Ack();
	SCCB_Stop();
	return val;
}
 
//设置摄像头模块PWDN脚的状态
//sta:0,PWDN=0,上电.
//    1,PWDN=1,掉电
void OV5640_PWDN_Set(uint8_t sta)
{
	PCF8574_WriteBit(DCMI_PWDN_IO,sta);
}
//初始化OV5640 
//配置完以后,默认输出是1600*1200尺寸的图片!! 
//返回值:0,成功
//    其他,错误代码
uint8_t OV5640_Init(void)
{ 
	uint16_t i=0;
	uint16_t reg;
    
	PCF8574_Init();			//初始化PCF8574
	OV5640_RST(0);			//必须先拉低OV5640的RST脚,再上电
	delay_ms(20); 
	OV5640_PWDN_Set(0);		//POWER ON
	delay_ms(5);  
	OV5640_RST(1);			//结束复位 
	delay_ms(20);      
	SCCB_Init();			//初始化SCCB 的IO口 
	delay_ms(5); 
	reg=OV5640_RD_Reg(OV5640_CHIPIDH);	//读取ID 高八位
	reg<<=8;
	reg|=OV5640_RD_Reg(OV5640_CHIPIDL);	//读取ID 低八位
	if(reg!=OV5640_ID)
	{
		printf("ID:%d\r\n",reg);
		return 1;
	}  
	OV5640_WR_Reg(0x3103,0X11);	//system clock from pad, bit[1]
	OV5640_WR_Reg(0X3008,0X82);	//软复位
	delay_ms(10);
	//初始化 OV5640,采用SXGA分辨率(1600*1200)  
	for(i=0;i<sizeof(ov5640_uxga_init_reg_tbl)/4;i++)
	{
		OV5640_WR_Reg(ov5640_uxga_init_reg_tbl[i][0],ov5640_uxga_init_reg_tbl[i][1]);
	}   
	//检查闪光灯是否正常
	OV5640_Flash_Ctrl(1);//打开闪光灯
	delay_ms(50);
	OV5640_Flash_Ctrl(0);//关闭闪光灯
	
	return 0x00; 	//ok
} 
//OV5640切换为JPEG模式
void OV5640_JPEG_Mode(void) 
{
	uint16_t i=0; 
	//设置:输出JPEG数据
	for(i=0;i<(sizeof(OV5640_jpeg_reg_tbl)/4);i++)
	{
		OV5640_WR_Reg(OV5640_jpeg_reg_tbl[i][0],OV5640_jpeg_reg_tbl[i][1]);  
	}  
}
//OV5640切换为RGB565模式
void OV5640_RGB565_Mode(void) 
{
	uint16_t i=0;
	//设置:RGB565输出
	for(i=0;i<(sizeof(ov5640_rgb565_reg_tbl)/4);i++)
	{
		OV5640_WR_Reg(ov5640_rgb565_reg_tbl[i][0],ov5640_rgb565_reg_tbl[i][1]); 
	} 
	OV5640_WR_Reg(0X3821,0X06);//RGB屏,水平镜像
} 
//灯光模式参数表,支持5个模式
const static uint8_t OV5640_LIGHTMODE_TBL[5][7]=
{ 
	0x04,0X00,0X04,0X00,0X04,0X00,0X00,//Auto,自动 
	0x06,0X1C,0X04,0X00,0X04,0XF3,0X01,//Sunny,日光
	0x05,0X48,0X04,0X00,0X07,0XCF,0X01,//Office,办公室
	0x06,0X48,0X04,0X00,0X04,0XD3,0X01,//Cloudy,阴天 
	0x04,0X10,0X04,0X00,0X08,0X40,0X01,//Home,室内
}; 
//白平衡设置
//0:自动
//1:日光sunny
//2,办公室office
//3,阴天cloudy
//4,家里home
void OV5640_Light_Mode(uint8_t mode)
{
	uint8_t i;
	OV5640_WR_Reg(0x3212,0x03);	//start group 3
	for(i=0;i<7;i++)OV5640_WR_Reg(0x3400+i,OV5640_LIGHTMODE_TBL[mode][i]);//设置饱和度 
	OV5640_WR_Reg(0x3212,0x13); //end group 3
	OV5640_WR_Reg(0x3212,0xa3); //launch group 3	
}
//色彩饱和度设置参数表,支持7个等级
const static uint8_t OV5640_SATURATION_TBL[7][6]=
{ 
	0X0C,0x30,0X3D,0X3E,0X3D,0X01,//-3 
	0X10,0x3D,0X4D,0X4E,0X4D,0X01,//-2	
	0X15,0x52,0X66,0X68,0X66,0X02,//-1	
	0X1A,0x66,0X80,0X82,0X80,0X02,//+0	
	0X1F,0x7A,0X9A,0X9C,0X9A,0X02,//+1	
	0X24,0x8F,0XB3,0XB6,0XB3,0X03,//+2
	0X2B,0xAB,0XD6,0XDA,0XD6,0X04,//+3
}; 
//色度设置
//sat:0~6,代表饱和度-3~3. 
void OV5640_Color_Saturation(uint8_t sat)
{ 
	uint8_t i;
	OV5640_WR_Reg(0x3212,0x03);	//start group 3
	OV5640_WR_Reg(0x5381,0x1c);
	OV5640_WR_Reg(0x5382,0x5a);
	OV5640_WR_Reg(0x5383,0x06);
	for(i=0;i<6;i++)OV5640_WR_Reg(0x5384+i,OV5640_SATURATION_TBL[sat][i]);//设置饱和度 
	OV5640_WR_Reg(0x538b, 0x98);
	OV5640_WR_Reg(0x538a, 0x01);
	OV5640_WR_Reg(0x3212, 0x13); //end group 3
	OV5640_WR_Reg(0x3212, 0xa3); //launch group 3	
}
//亮度设置
//bright:0~8,代表亮度-4~4.
void OV5640_Brightness(uint8_t bright)
{
	uint8_t brtval;
	if(bright<4)brtval=4-bright;
	else brtval=bright-4;
	OV5640_WR_Reg(0x3212,0x03);	//start group 3
	OV5640_WR_Reg(0x5587,brtval<<4);
	if(bright<4)OV5640_WR_Reg(0x5588,0x09);
	else OV5640_WR_Reg(0x5588,0x01);
	OV5640_WR_Reg(0x3212,0x13); //end group 3
	OV5640_WR_Reg(0x3212,0xa3); //launch group 3
}
//对比度设置
//contrast:0~6,代表亮度-3~3.
void OV5640_Contrast(uint8_t contrast)
{
	uint8_t reg0val=0X00;//contrast=3,默认对比度
	uint8_t reg1val=0X20;
	switch(contrast)
	{
		case 0://-3
			reg1val=reg0val=0X14;	 	 
		break;	
		case 1://-2
			reg1val=reg0val=0X18; 	 
		break;	
		case 2://-1
			reg1val=reg0val=0X1C;	 
		break;	
		case 4://1
			reg0val=0X10;	 	 
			reg1val=0X24;	 	 
		break;	
		case 5://2
			reg0val=0X18;	 	 
			reg1val=0X28;	 	 
		break;	
		case 6://3
			reg0val=0X1C;	 	 
			reg1val=0X2C;	 	 
		break;	
	} 
	OV5640_WR_Reg(0x3212,0x03); //start group 3
	OV5640_WR_Reg(0x5585,reg0val);
	OV5640_WR_Reg(0x5586,reg1val); 
	OV5640_WR_Reg(0x3212,0x13); //end group 3
	OV5640_WR_Reg(0x3212,0xa3); //launch group 3
}
//锐度设置
//sharp:0~33,0,关闭;33,auto;其他值,锐度范围.
void OV5640_Sharpness(uint8_t sharp)
{
	if(sharp<33)//设置锐度值
	{
		OV5640_WR_Reg(0x5308,0x65);
		OV5640_WR_Reg(0x5302,sharp);
	}else	//自动锐度
	{
		OV5640_WR_Reg(0x5308,0x25);
		OV5640_WR_Reg(0x5300,0x08);
		OV5640_WR_Reg(0x5301,0x30);
		OV5640_WR_Reg(0x5302,0x10);
		OV5640_WR_Reg(0x5303,0x00);
		OV5640_WR_Reg(0x5309,0x08);
		OV5640_WR_Reg(0x530a,0x30);
		OV5640_WR_Reg(0x530b,0x04);
		OV5640_WR_Reg(0x530c,0x06);
	}
}
//特效设置参数表,支持7个特效
const static uint8_t OV5640_EFFECTS_TBL[7][3]=
{ 
	0X06,0x40,0X10,//正常 
	0X1E,0xA0,0X40,//冷色
	0X1E,0x80,0XC0,//暖色
	0X1E,0x80,0X80,//黑白
	0X1E,0x40,0XA0,//泛黄 
	0X40,0x40,0X10,//反色
	0X1E,0x60,0X60,//偏绿
}; 
//特效设置
//0:正常    
//1,冷色
//2,暖色   
//3,黑白
//4,偏黄
//5,反色
//6,偏绿	    
void OV5640_Special_Effects(uint8_t eft)
{ 
	OV5640_WR_Reg(0x3212,0x03); //start group 3
	OV5640_WR_Reg(0x5580,OV5640_EFFECTS_TBL[eft][0]);
	OV5640_WR_Reg(0x5583,OV5640_EFFECTS_TBL[eft][1]);// sat U
	OV5640_WR_Reg(0x5584,OV5640_EFFECTS_TBL[eft][2]);// sat V
	OV5640_WR_Reg(0x5003,0x08);
	OV5640_WR_Reg(0x3212,0x13); //end group 3
	OV5640_WR_Reg(0x3212,0xa3); //launch group 3
}
//测试序列
//mode:0,关闭
//     1,彩条 
//     2,色块
void OV5640_Test_Pattern(uint8_t mode)
{
	if(mode==0)OV5640_WR_Reg(0X503D,0X00);
	else if(mode==1)OV5640_WR_Reg(0X503D,0X80);
	else if(mode==2)OV5640_WR_Reg(0X503D,0X82);
} 
//闪光灯控制
//mode:0,关闭
//     1,打开 
void OV5640_Flash_Ctrl(uint8_t sw)
{
	OV5640_WR_Reg(0x3016,0X02);
	OV5640_WR_Reg(0x301C,0X02); 
	if(sw)OV5640_WR_Reg(0X3019,0X02); 
	else OV5640_WR_Reg(0X3019,0X00);
} 
//设置图像输出大小
//OV5640输出图像的大小(分辨率),完全由该函数确定
//offx,offy,为输出图像在OV5640_ImageWin_Set设定窗口(假设长宽为xsize和ysize)上的偏移
//由于开启了scale功能,用于输出的图像窗口为:xsize-2*offx,ysize-2*offy
//width,height:实际输出图像的宽度和高度
//实际输出(width,height),是在xsize-2*offx,ysize-2*offy的基础上进行缩放处理.
//一般设置offx和offy的值为16和4,更小也是可以,不过默认是16和4 
//返回值:0,设置成功
//    其他,设置失败
uint8_t OV5640_OutSize_Set(uint16_t offx,uint16_t offy,uint16_t width,uint16_t height)
{ 
	OV5640_WR_Reg(0X3212,0X03);  	//开始组3
	//以下设置决定实际输出尺寸(带缩放)
	OV5640_WR_Reg(0x3808,width>>8);	//设置实际输出宽度高字节
	OV5640_WR_Reg(0x3809,width&0xff);//设置实际输出宽度低字节  
	OV5640_WR_Reg(0x380a,height>>8);//设置实际输出高度高字节
	OV5640_WR_Reg(0x380b,height&0xff);//设置实际输出高度低字节
	//以下设置决定输出尺寸在ISP上面的取图范围
	//范围:xsize-2*offx,ysize-2*offy
	OV5640_WR_Reg(0x3810,offx>>8);	//设置X offset高字节
	OV5640_WR_Reg(0x3811,offx&0xff);//设置X offset低字节

	OV5640_WR_Reg(0x3812,offy>>8);	//设置Y offset高字节
	OV5640_WR_Reg(0x3813,offy&0xff);//设置Y offset低字节

	OV5640_WR_Reg(0X3212,0X13);		//结束组3
	OV5640_WR_Reg(0X3212,0Xa3);		//启用组3设置
	return 0; 
}

//设置图像开窗大小(ISP大小),非必要,一般无需调用此函数
//在整个传感器上面开窗(最大2592*1944),用于OV5640_OutSize_Set的输出
//注意:本函数的宽度和高度,必须大于等于OV5640_OutSize_Set函数的宽度和高度
//     OV5640_OutSize_Set设置的宽度和高度,根据本函数设置的宽度和高度,由DSP
//     自动计算缩放比例,输出给外部设备.
//width,height:宽度(对应:horizontal)和高度(对应:vertical)  
//返回值:0,设置成功
//    其他,设置失败
uint8_t OV5640_ImageWin_Set(uint16_t offx,uint16_t offy,uint16_t width,uint16_t height)
{
	uint16_t xst,yst,xend,yend;
	xst=offx;
	yst=offy;
	xend=offx+width-1;
	yend=offy+height-1;  
	OV5640_WR_Reg(0X3212,0X03);		//开始组3
	OV5640_WR_Reg(0X3800,xst>>8);	
	OV5640_WR_Reg(0X3801,xst&0XFF);	
	OV5640_WR_Reg(0X3802,yst>>8);	
	OV5640_WR_Reg(0X3803,yst&0XFF);	
	OV5640_WR_Reg(0X3804,xend>>8);	
	OV5640_WR_Reg(0X3805,xend&0XFF);
	OV5640_WR_Reg(0X3806,yend>>8);	
	OV5640_WR_Reg(0X3807,yend&0XFF);
	OV5640_WR_Reg(0X3212,0X13);		//结束组3
	OV5640_WR_Reg(0X3212,0Xa3);		//启用组3设置	 
	return 0;
}   
//初始化自动对焦
//返回值:0,成功;1,失败.
uint8_t OV5640_Focus_Init(void)
{ 
	uint16_t i; 
	uint16_t addr=0x8000;
	uint8_t state=0x8F;
	OV5640_WR_Reg(0x3000, 0x20);			//reset MCU	 
	for(i=0;i<sizeof(OV5640_AF_Config);i++) //发送配置数组
	{
		OV5640_WR_Reg(addr,OV5640_AF_Config[i]);
		addr++;
	}  
	OV5640_WR_Reg(0x3022,0x00);
	OV5640_WR_Reg(0x3023,0x00);
	OV5640_WR_Reg(0x3024,0x00);
	OV5640_WR_Reg(0x3025,0x00);
	OV5640_WR_Reg(0x3026,0x00);
	OV5640_WR_Reg(0x3027,0x00);
	OV5640_WR_Reg(0x3028,0x00);
	OV5640_WR_Reg(0x3029,0x7f);
	OV5640_WR_Reg(0x3000,0x00); 
	i=0;
	do
	{
		state=OV5640_RD_Reg(0x3029);	
		delay_ms(5);
		i++;
		if(i>1000)return 1;
	}while(state!=0x70); 
	return 0;    
}  
//执行一次自动对焦
//返回值:0,成功;1,失败.
uint8_t OV5640_Focus_Single(void)
{
	uint8_t temp; 
	uint16_t retry=0; 
	OV5640_WR_Reg(0x3022,0x03);		//触发一次自动对焦 
	while(1)
	{
		retry++;
		temp=OV5640_RD_Reg(0x3029);	//检查对焦完成状态
		if(temp==0x10)break;		// focus completed
		delay_ms(5);
		if(retry>1000)return 1;
	}
	return 0;	 		
}
//持续自动对焦,当失焦后,会自动继续对焦
//返回值:0,成功;其他,失败.
uint8_t OV5640_Focus_Constant(void)
{
	uint8_t temp=0;   
	uint16_t retry=0; 
	OV5640_WR_Reg(0x3023,0x01);
	OV5640_WR_Reg(0x3022,0x08);//发送IDLE指令 
	do 
	{
		temp=OV5640_RD_Reg(0x3023); 
		retry++;
		if(retry>1000)return 2;
		delay_ms(5);
	} while(temp!=0x00);   
	OV5640_WR_Reg(0x3023,0x01);
	OV5640_WR_Reg(0x3022,0x04);//发送持续对焦指令 
	retry=0;
	do 
	{
		temp=OV5640_RD_Reg(0x3023); 
		retry++;
		if(retry>1000)return 2;
		delay_ms(5);
	}while(temp!=0x00);//0,对焦完成;1:正在对焦
	return 0;
} 

const uint8_t *EFFECTS_TBL[7]={"Normal","Cool","Warm","B&W","Yellowish ","Inverse","Greenish"};	//7种特效 

uint16_t curline=0;							//摄像头输出数据,当前行编号
uint16_t yoffset=0;							//y方向的偏移量

//RGB565测试
//RGB数据直接显示在LCD上面
void rgb565_test(void)
{ 
	uint8_t key;
	uint8_t effect=0,contrast=2,fac;
	uint8_t scale=1;		//默认是全尺寸缩放
	uint8_t msgbuf[15];	//消息缓存区 
	uint16_t outputheight=0;
	
	LTDC_Clear(WHITE);  
	POINT_COLOR=RED; 
	LCD_ShowString(30,50,200,16,16,"Apollo STM32F4/F7");
	LCD_ShowString(30,70,200,16,16,"OV5640 RGB565 Mode"); 
	LCD_ShowString(30,100,200,16,16,"KEY0:Contrast");			//对比度
	LCD_ShowString(30,120,200,16,16,"KEY1:Auto Focus"); 		//执行自动对焦
	LCD_ShowString(30,140,200,16,16,"KEY2:Effects"); 			//特效 
	LCD_ShowString(30,160,200,16,16,"KEY_UP:FullSize/Scale");	//1:1尺寸(显示真实尺寸)/全尺寸缩放
	//自动对焦初始化
	OV5640_RGB565_Mode();	//RGB565模式	
	OV5640_Focus_Init();
	OV5640_Light_Mode(0);	//自动模式
	OV5640_Color_Saturation(3);//色彩饱和度0
	OV5640_Brightness(4);	//亮度0
	OV5640_Contrast(3);		//对比度0
	OV5640_Sharpness(33);	//自动锐度
	OV5640_Focus_Constant();//启动持续对焦

	if(lcddev.height==1024)
	{
		yoffset=(lcddev.height-800)/2;
		outputheight=800;
		OV5640_WR_Reg(0x3035,0X51);//降低输出帧率，否则可能抖动
	}else if(lcddev.height==1280)
	{
		yoffset=(lcddev.height-600)/2;
		outputheight=600;
		OV5640_WR_Reg(0x3035,0X51);//降低输出帧率，否则可能抖动
	}else 
	{
		yoffset=0;
		outputheight=lcddev.height;
	}
	curline=yoffset;		//行数复位
	OV5640_OutSize_Set(4,0,lcddev.width,outputheight);		//满屏缩放显示
	
	BSP_DCMI_MultiBufferStart_DMA_IT(&hdcmi, DCMI_MODE_CONTINUOUS);
	LTDC_Clear(BLACK);
	while(1)
	{ 
		key=KEY_Scan(0); 
		if(key)
		{ 
			if(key!=KEY1_PRES)HAL_DCMI_Stop(&hdcmi); //非KEY1按下,停止显示
			switch(key)
			{				    
				case KEY0_PRES:	//对比度设置
					contrast++;
					if(contrast>6)contrast=0;
					OV5640_Contrast(contrast);
					sprintf((char*)msgbuf,"Contrast:%d",(signed char)contrast-3);
					break;
				case KEY1_PRES:	//执行一次自动对焦
					OV5640_Focus_Single();
					break;
				case KEY2_PRES:	//特效设置				 
					effect++;
					if(effect>6)effect=0;
					OV5640_Special_Effects(effect);//设置特效
					sprintf((char*)msgbuf,"%s",EFFECTS_TBL[effect]);
					break;
				case WKUP_PRES:	//1:1尺寸(显示真实尺寸)/缩放	    
					scale=!scale;  
					if(scale==0)
					{
						fac=800/outputheight;	//得到比例因子
 						OV5640_OutSize_Set((1280-fac*lcddev.width)/2,(800-fac*outputheight)/2,lcddev.width,outputheight); 	 
						sprintf((char*)msgbuf,"Full Size 1:1");
					}else 
					{
						OV5640_OutSize_Set(4,0,lcddev.width,outputheight);
 						sprintf((char*)msgbuf,"Scale");
					}
					break;
			}
			if(key!=KEY1_PRES)	//非KEY1按下
			{
				LCD_ShowString(30,50,210,16,16,msgbuf);//显示提示内容
				delay_ms(800); 
				//DCMI_Start();	//重新开始传输
				BSP_DCMI_MultiBufferStart_DMA_IT(&hdcmi, DCMI_MODE_CONTINUOUS);
			}
		} 
		delay_ms(10);		
	}    
}

#include "bsp_pcf8574.h"

#define PCF8574_DEV_ADDR 0x40

//初始化PCF8574
uint8_t PCF8574_Init(void)
{
	HAL_StatusTypeDef sta;
	uint8_t Data = 0xFF;
	
	sta = HAL_I2C_Master_Transmit(&hi2c2, PCF8574_DEV_ADDR, &Data, 1, HAL_MAX_DELAY);
	return (uint8_t)sta;
}

//设置PCF8574某个IO的高低电平
//bit:要设置的IO编号,0~7
//sta:IO的状态;0或1
void PCF8574_WriteBit(uint8_t bit,uint8_t sta)
{
	uint8_t data;
	HAL_I2C_Master_Receive(&hi2c2, PCF8574_DEV_ADDR, &data, 1, HAL_MAX_DELAY);
	if(sta==0)data&=~(1<<bit);     
	else data|=1<<bit;
	HAL_I2C_Master_Transmit(&hi2c2, PCF8574_DEV_ADDR, &data, 1, HAL_MAX_DELAY);
}

//读取PCF8574的某个IO的值
//bit：要读取的IO编号,0~7
//返回值:此IO的值,0或1
uint8_t PCF8574_ReadBit(uint8_t bit)
{
    uint8_t data;
		HAL_I2C_Master_Receive(&hi2c2, PCF8574_DEV_ADDR, &data, 1, HAL_MAX_DELAY);//先读取这个8位IO的值 
    if(data&(1<<bit))return 1;
    else return 0;   
}

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