STM32--基于STM32F103C8T6的OV7670摄像头显示_stm32f103 摄像头
本文介绍基于STM32F103C8T6实现的OV7670摄像头显示设计（完整资源及代码见文末链接）
一、简介
本文实现的功能：基于STM32F103C8T6实现的OV7670摄像头模组实时在2.2寸TFT彩屏上显示出来
所需硬件： STM32F103C8T6最小系统板、OV7670摄像头模组（带FIFO）、2.2寸TFT彩屏、SWD下载线等。对各模块分别介绍如下：
（1）STM32F103C8T6最小系统
C8T6是STM32F103系列入门的款的芯片，具有相对丰富的管脚资源，工作频率72MHz，64K Byte Flash，是常用的MCU控制器，对其不再过多赘述
（2）OV7670摄像头模组（带FIFO）
现在市面上的OV7670模块分两种：1、带FIFO芯片，2、不带FIFO芯片，带FIFO的要贵一点。
先说明一下，FIFO（First Input First Output）先入先出的意思，相当于一个数据存储器，只能顺序进行数据读和写。
那么为什么要带FIFO呢，OV7670本身摄像头的IO口速率很高，不是一般单片机可以达到的。我使用的STM32F103C8T6核心板，GPIO口根本达不到摄像头要求，所以无法直接进行数据读写，必须使用FIFO进行缓存一下。
二、硬件连接方式
OV7670（带FIFO）和C8T6的接线图如下：
2.2寸TFT SPI屏幕和C8T6的接线图如下：
三、实物图
实物图如下，2.2寸屏幕和C8T6以及OV7670连接均是按照上述描述进行，下图屏幕展示为一个水杯图片
四、关键核心代码解析
（1）OV7670.h头文件
#define _OV7670_H#include \"sys.h\"#include \"sccb.h\"// //ALIENTEK战舰STM32开发板V3//OV7670 驱动代码 // #define OV7670_VSYNC PAin(8)//同步信号检测IO#define OV7670_WRSTPBout(0)//写指针复位 #define OV7670_WRENPBout(12)//写入FIFO使能#define OV7670_RCK_HGPIOA->BSRR=1<<11//设置读数据时钟高电平#define OV7670_RCK_LGPIOA->BRR=1<<11//设置读数据时钟低电平#define OV7670_RRSTPBout(1) //读指针复位#define OV7670_CSPAout(15) //片选信号(OE) #define OV7670_DATA GPIOA->IDR&0x00FF //数据输入端口/ u8 OV7670_Init(void); void OV7670_Light_Mode(u8 mode);void OV7670_Color_Saturation(u8 sat);void OV7670_Brightness(u8 bright);void OV7670_Contrast(u8 contrast);void OV7670_Special_Effects(u8 eft);void OV7670_Window_Set(u16 sx,u16 sy,u16 width,u16 height);void OV7670_Effects_Set(void); #endif（2）OV7670.c文件
#include \"sys.h\"#include \"ov7670.h\"#include \"ov7670cfg.h\"//#include \"timer.h\" #include \"delay.h\"#include \"usart.h\" #include \"sccb.h\"#include \"exti.h\"// //ALIENTEK精英STM32开发板V3//OV7670 驱动代码 // //初始化OV7670//返回0:成功//返回其他值:错误代码u8 OV7670_Init(void){u8 temp;u16 i=0; //设置IO GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE); //使能相关端口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //PA8 - VSY 输入 上拉GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure);GPIO_SetBits(GPIOA,GPIO_Pin_8); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; // PB12 - WR GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_SetBits(GPIOB,GPIO_Pin_12);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; // PA11 - RCK GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_SetBits(GPIOA,GPIO_Pin_11);GPIO_InitStructure.GPIO_Pin = 0xff; //PA0~7 输入 上拉GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; // PA15 - OEGPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOA, &GPIO_InitStructure);GPIO_SetBits(GPIOA,GPIO_Pin_15);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; // PB3 - RRST PB4 - WRSTGPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOB, &GPIO_InitStructure);GPIO_SetBits(GPIOB,GPIO_Pin_0|GPIO_Pin_1);GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//SWD SCCB_Init(); //初始化SCCB 的IO口 if(SCCB_WR_Reg(0x12,0x80))return 1;//复位SCCB delay_ms(50); //读取产品型号 temp=SCCB_RD_Reg(0x0b); //printf(\"TEMP1 = %u\\r\\n\",temp);if(temp!=0x73)return 2; temp=SCCB_RD_Reg(0x0a); //printf(\"TEMP2 = %u\\r\\n\",temp);if(temp!=0x76)return 2;//初始化序列 for(i=0;i<sizeof(ov7670_init_reg_tbl)/sizeof(ov7670_init_reg_tbl[0]);i++){ SCCB_WR_Reg(ov7670_init_reg_tbl[i][0],ov7670_init_reg_tbl[i][1]); }//printf(\"ov7670 init ok\\r\\n\"); return 0x00; //ok} //OV7670功能设置//白平衡设置//0:自动//1:太阳sunny//2,阴天cloudy//3,办公室office//4,家里homevoid OV7670_Light_Mode(u8 mode){u8 reg13val=0XE7;//默认就是设置为自动白平衡u8 reg01val=0;u8 reg02val=0;switch(mode){case 1://sunnyreg13val=0XE5;reg01val=0X5A;reg02val=0X5C;break;case 2://cloudyreg13val=0XE5;reg01val=0X58;reg02val=0X60;break;case 3://officereg13val=0XE5;reg01val=0X84;reg02val=0X4c;break;case 4://homereg13val=0XE5;reg01val=0X96;reg02val=0X40;break;}SCCB_WR_Reg(0X13,reg13val);//COM8设置 SCCB_WR_Reg(0X01,reg01val);//AWB蓝色通道增益 SCCB_WR_Reg(0X02,reg02val);//AWB红色通道增益 } //色度设置//0:-2//1:-1//2,0//3,1//4,2void OV7670_Color_Saturation(u8 sat){u8 reg4f5054val=0X80;//默认就是sat=2,即不调节色度的设置 u8 reg52val=0X22;u8 reg53val=0X5E; switch(sat){case 0://-2reg4f5054val=0X40; reg52val=0X11;reg53val=0X2F; break;case 1://-1reg4f5054val=0X66; reg52val=0X1B;reg53val=0X4B; break;case 3://1reg4f5054val=0X99; reg52val=0X28;reg53val=0X71; break;case 4://2reg4f5054val=0XC0; reg52val=0X33;reg53val=0X8D; break;}SCCB_WR_Reg(0X4F,reg4f5054val);//色彩矩阵系数1SCCB_WR_Reg(0X50,reg4f5054val);//色彩矩阵系数2 SCCB_WR_Reg(0X51,0X00);//色彩矩阵系数3 SCCB_WR_Reg(0X52,reg52val);//色彩矩阵系数4 SCCB_WR_Reg(0X53,reg53val);//色彩矩阵系数5 SCCB_WR_Reg(0X54,reg4f5054val);//色彩矩阵系数6 SCCB_WR_Reg(0X58,0X9E);//MTXS }//亮度设置//0:-2//1:-1//2,0//3,1//4,2void OV7670_Brightness(u8 bright){u8 reg55val=0X00;//默认就是bright=2 switch(bright){case 0://-2reg55val=0XB0; break;case 1://-1reg55val=0X98; break;case 3://1reg55val=0X18; break;case 4://2reg55val=0X30; break;}SCCB_WR_Reg(0X55,reg55val);//亮度调节 }//对比度设置//0:-2//1:-1//2,0//3,1//4,2void OV7670_Contrast(u8 contrast){u8 reg56val=0X40;//默认就是contrast=2 switch(contrast){case 0://-2reg56val=0X30; break;case 1://-1reg56val=0X38; break;case 3://1reg56val=0X50; break;case 4://2reg56val=0X60; break;}SCCB_WR_Reg(0X56,reg56val);//对比度调节 }//特效设置//0:普通模式 //1,负片//2,黑白 //3,偏红色//4,偏绿色//5,偏蓝色//6,复古 void OV7670_Special_Effects(u8 eft){u8 reg3aval=0X04;//默认为普通模式u8 reg67val=0XC0;u8 reg68val=0X80;switch(eft){case 1://负片reg3aval=0X24;reg67val=0X80;reg68val=0X80;break;case 2://黑白reg3aval=0X14;reg67val=0X80;reg68val=0X80;break;case 3://偏红色reg3aval=0X14;reg67val=0Xc0;reg68val=0X80;break;case 4://偏绿色reg3aval=0X14;reg67val=0X40;reg68val=0X40;break;case 5://偏蓝色reg3aval=0X14;reg67val=0X80;reg68val=0XC0;break;case 6://复古reg3aval=0X14;reg67val=0XA0;reg68val=0X40;break; }SCCB_WR_Reg(0X3A,reg3aval);//TSLB设置 SCCB_WR_Reg(0X68,reg67val);//MANU,手动U值 SCCB_WR_Reg(0X67,reg68val);//MANV,手动V值 }//设置图像输出窗口//对QVGA设置。void OV7670_Window_Set(u16 sx,u16 sy,u16 width,u16 height){u16 endx;u16 endy;u8 temp; endx=sx+width*2;//V*2 endy=sy+height*2;if(endy>784)endy-=784;temp=SCCB_RD_Reg(0X03);//读取Vref之前的值temp&=0XF0;temp|=((endx&0X03)<<2)|(sx&0X03);SCCB_WR_Reg(0X03,temp);//设置Vref的start和end的最低2位SCCB_WR_Reg(0X19,sx>>2);//设置Vref的start高8位SCCB_WR_Reg(0X1A,endx>>2);//设置Vref的end的高8位 temp=SCCB_RD_Reg(0X32);//读取Href之前的值temp&=0XC0;temp|=((endy&0X07)<<3)|(sy&0X07);SCCB_WR_Reg(0X17,sy>>3);//设置Href的start高8位SCCB_WR_Reg(0X18,endy>>3);//设置Href的end的高8位} void OV7670_Effects_Set(void) {u8 lightmode=0,effect=0;s8 saturation=4,brightness=0,contrast=0; OV7670_Light_Mode(lightmode);OV7670_Color_Saturation(saturation);OV7670_Brightness(brightness);OV7670_Contrast(contrast);OV7670_Special_Effects(effect);//OV7670_Window_Set(184,10,320,240);//设置窗口 320*240 宽x高OV7670_Window_Set(12,176,240,320);//设置窗口 } 2.2寸TFT初始化
（1）LCD.h头文件
#ifndef __LCD_H#define __LCD_H#include \"sys.h\" #include \"stdlib.h\" //LCD重要参数集typedef struct { u16 width;//LCD 宽度u16 height;//LCD 高度u16 id; //LCD IDu8 dir; //横屏还是竖屏控制：0，竖屏；1，横屏。u16 wramcmd;//开始写gram指令u16 setxcmd;//设置x坐标指令u16 setycmd;//设置y坐标指令 }_lcd_dev; //LCD参数extern _lcd_dev lcddev;//管理LCD重要参数/用户配置区/// #define USE_HORIZONTAL 0//定义液晶屏顺时针旋转方向 0-0度旋转，1-90度旋转，2-180度旋转，3-270度旋转 // //定义LCD的尺寸#define LCD_W 240#define LCD_H 320 //TFTLCD部分外要调用的函数 extern u16 POINT_COLOR;//默认红色 extern u16 BACK_COLOR; //背景颜色.默认为白色 //-----------------LCD端口定义---------------- #define GPIO_TYPE GPIOB //GPIO组类型#define LED 5 //背光控制引脚 PB9#define LCD_CS 6 //片选引脚 PB11#define LCD_RS 8 //寄存器/数据选择引脚 PB10 #define LCD_RST 7 //复位引脚 PB12 //QDtech全系列模块采用了三极管控制背光亮灭，用户也可以接PWM调节背光亮度#defineLCD_LED PBout(LED) //LCD背光 PB9//如果使用官方库函数定义下列底层，速度将会下降到14帧每秒，建议采用我司推荐方法//以下IO定义直接操作寄存器，快速IO操作，刷屏速率可以达到28帧每秒！ //GPIO置位（拉高）#defineLCD_CS_SET GPIO_TYPE->BSRR=1<<LCD_CS //片选端口 PB11#defineLCD_RS_SETGPIO_TYPE->BSRR=1<<LCD_RS //数据/命令 PB10 #defineLCD_RST_SETGPIO_TYPE->BSRR=1<<LCD_RST //复位 PB12 //GPIO复位（拉低） #defineLCD_CS_CLR GPIO_TYPE->BRR=1<<LCD_CS //片选端口 PB11#defineLCD_RS_CLRGPIO_TYPE->BRR=1<<LCD_RS //数据/命令 PB10 #defineLCD_RST_CLRGPIO_TYPE->BRR=1<<LCD_RST //复位 PB12 //画笔颜色#define WHITE 0xFFFF#define BLACK 0x0000 #define BLUE 0x001F #define BRED 0XF81F#define GRED 0XFFE0#define GBLUE0X07FF#define RED 0xF800#define MAGENTA 0xF81F#define GREEN 0x07E0#define CYAN 0x7FFF#define YELLOW 0xFFE0#define BROWN 0XBC40 //棕色#define BRRED 0XFC07 //棕红色#define GRAY 0X8430 //灰色//GUI颜色 #define DARKBLUE 0X01CF//深蓝色#define LIGHTBLUE 0X7D7C//浅蓝色 #define GRAYBLUE 0X5458 //灰蓝色//以上三色为PANEL的颜色 #define LIGHTGREEN 0X841F //浅绿色#define LIGHTGRAY 0XEF5B //浅灰色(PANNEL)#define LGRAY 0XC618 //浅灰色(PANNEL),窗体背景色 #define LGRAYBLUE 0XA651 //浅灰蓝色(中间层颜色)#define LBBLUE 0X2B12 //浅棕蓝色(选择条目的反色) void LCD_Init(void);void LCD_DisplayOn(void);void LCD_DisplayOff(void);void LCD_Clear(u16 Color); void LCD_SetCursor(u16 Xpos, u16 Ypos);void LCD_DrawPoint(u16 x,u16 y);//画点u16 LCD_ReadPoint(u16 x,u16 y); //读点void LCD_DrawLine(u16 x1, u16 y1, u16 x2, u16 y2);void LCD_DrawRectangle(u16 x1, u16 y1, u16 x2, u16 y2); void LCD_SetWindows(u16 xStar, u16 yStar,u16 xEnd,u16 yEnd); u16 LCD_RD_DATA(void);//读取LCD数据 void LCD_WriteReg(u8 LCD_Reg, u16 LCD_RegValue);void LCD_WR_DATA(u8 data);u16 LCD_ReadReg(u8 LCD_Reg);void LCD_WriteRAM_Prepare(void);void LCD_WriteRAM(u16 RGB_Code);u16 LCD_ReadRAM(void); u16 LCD_BGR2RGB(u16 c);void LCD_SetParam(void);void Lcd_WriteData_16Bit(u16 Data);void LCD_direction(u8 direction );void LCD_DrawFRONT_COLOR(u16 x,u16 y,u16 color);//如果仍然觉得速度不够快，可以使用下面的宏定义,提高速度.//注意要去掉lcd.c中void LCD_WR_DATA(u16 data)函数定义哦/*#if LCD_USE8BIT_MODEL==1//使用8位并行数据总线模式#define LCD_WR_DATA(data){\\LCD_RS_SET;\\LCD_CS_CLR;\\DATAOUT(data);\\LCD_WR_CLR;\\LCD_WR_SET;\\DATAOUT(data<<8);\\LCD_WR_CLR;\\LCD_WR_SET;\\LCD_CS_SET;\\}#else//使用16位并行数据总线模式#define LCD_WR_DATA(data){\\LCD_RS_SET;\\LCD_CS_CLR;\\DATAOUT(data);\\LCD_WR_CLR;\\LCD_WR_SET;\\LCD_CS_SET;\\} #endif*/ #endif（2）LCD.c文件
#include \"lcd.h\"#include \"stdlib.h\"#include \"delay.h\" #include \"SPI.h\" //管理LCD重要参数//默认为竖屏_lcd_dev lcddev; //画笔颜色,背景颜色u16 POINT_COLOR = 0x0000,BACK_COLOR = 0xFFFF; u16 DeviceCode; /***************************************************************************** * @name :void LCD_WR_REG(u8 data) * @date :2018-08-09 * @function :Write an 8-bit command to the LCD screen * @parameters :data:Command value to be written * @retvalue :None******************************************************************************/void LCD_WR_REG(u8 data){ LCD_CS_CLR; LCD_RS_CLR; SPI_WriteByte(SPI2,data);LCD_CS_SET;} /***************************************************************************** * @name :void LCD_WR_DATA(u8 data) * @date :2018-08-09 * @function :Write an 8-bit data to the LCD screen * @parameters :data:data value to be written * @retvalue :None******************************************************************************/void LCD_WR_DATA(u8 data){ LCD_CS_CLR; LCD_RS_SET; SPI_WriteByte(SPI2,data); LCD_CS_SET;} /***************************************************************************** * @name :void LCD_WriteReg(u8 LCD_Reg, u16 LCD_RegValue) * @date :2018-08-09 * @function :Write data into registers * @parameters :LCD_Reg:Register address LCD_RegValue:Data to be written * @retvalue :None******************************************************************************/void LCD_WriteReg(u8 LCD_Reg, u16 LCD_RegValue){LCD_WR_REG(LCD_Reg); LCD_WR_DATA(LCD_RegValue); } /***************************************************************************** * @name :void LCD_WriteRAM_Prepare(void) * @date :2018-08-09 * @function :Write GRAM * @parameters :None * @retvalue :None******************************************************************************/ void LCD_WriteRAM_Prepare(void){LCD_WR_REG(lcddev.wramcmd);} /***************************************************************************** * @name :void Lcd_WriteData_16Bit(u16 Data) * @date :2018-08-09 * @function :Write an 16-bit command to the LCD screen * @parameters :Data:Data to be written * @retvalue :None******************************************************************************/ void Lcd_WriteData_16Bit(u16 Data){ LCD_CS_CLR; LCD_RS_SET; SPI_WriteByte(SPI2,Data>>8); SPI_WriteByte(SPI2,Data); LCD_CS_SET;} /***************************************************************************** * @name :void LCD_DrawPoint(u16 x,u16 y) * @date :2018-08-09 * @function :Write a pixel data at a specified location * @parameters :x:the x coordinate of the pixel y:the y coordinate of the pixel * @retvalue :None******************************************************************************/void LCD_DrawPoint(u16 x,u16 y){LCD_SetCursor(x,y);//设置光标位置 Lcd_WriteData_16Bit(POINT_COLOR); } /***************************************************************************** * @name :void LCD_Clear(u16 Color) * @date :2018-08-09 * @function :Full screen filled LCD screen * @parameters :color:Filled color * @retvalue :None******************************************************************************/void LCD_Clear(u16 Color){ unsigned int i,m; LCD_SetWindows(0,0,lcddev.width-1,lcddev.height-1); LCD_CS_CLR;LCD_RS_SET;for(i=0;i<lcddev.height;i++){for(m=0;m<lcddev.width;m++){Lcd_WriteData_16Bit(Color);}} LCD_CS_SET;} /***************************************************************************** * @name :void LCD_GPIOInit(void) * @date :2018-08-09 * @function :Initialization LCD screen GPIO * @parameters :None * @retvalue :None******************************************************************************/void LCD_GPIOInit(void){GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB ,ENABLE);//使能GPIOB时钟GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5| GPIO_Pin_6| GPIO_Pin_7| GPIO_Pin_8; //GPIOB9,10,11,12GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化} /***************************************************************************** * @name :void LCD_RESET(void) * @date :2018-08-09 * @function :Reset LCD screen * @parameters :None * @retvalue :None******************************************************************************/void LCD_RESET(void){LCD_RST_CLR;delay_ms(100);LCD_RST_SET;delay_ms(50);} /***************************************************************************** * @name :void LCD_RESET(void) * @date :2018-08-09 * @function :Initialization LCD screen * @parameters :None * @retvalue :None******************************************************************************/ void LCD_Init(void){ LCD_GPIOInit();//LCD GPIO初始化 LCD_RESET(); //LCD 复位//*************2.8inch ILI9341初始化**********//LCD_WR_REG(0xCF); LCD_WR_DATA(0x00); LCD_WR_DATA(0xC9); //C1 LCD_WR_DATA(0X30); LCD_WR_REG(0xED); LCD_WR_DATA(0x64); LCD_WR_DATA(0x03); LCD_WR_DATA(0X12); LCD_WR_DATA(0X81); LCD_WR_REG(0xE8); LCD_WR_DATA(0x85); LCD_WR_DATA(0x10); LCD_WR_DATA(0x7A); LCD_WR_REG(0xCB); LCD_WR_DATA(0x39); LCD_WR_DATA(0x2C); LCD_WR_DATA(0x00); LCD_WR_DATA(0x34); LCD_WR_DATA(0x02); LCD_WR_REG(0xF7); LCD_WR_DATA(0x20); LCD_WR_REG(0xEA); LCD_WR_DATA(0x00); LCD_WR_DATA(0x00); LCD_WR_REG(0xC0); //Power control LCD_WR_DATA(0x1B); //VRH[5:0] LCD_WR_REG(0xC1); //Power control LCD_WR_DATA(0x00); //SAP[2:0];BT[3:0] 01 LCD_WR_REG(0xC5); //VCM control LCD_WR_DATA(0x30); //3FLCD_WR_DATA(0x30); //3CLCD_WR_REG(0xC7); //VCM control2 LCD_WR_DATA(0XB7); LCD_WR_REG(0x36); // Memory Access Control LCD_WR_DATA(0x08); LCD_WR_REG(0x3A); LCD_WR_DATA(0x55); LCD_WR_REG(0xB1); LCD_WR_DATA(0x00); LCD_WR_DATA(0x1A); LCD_WR_REG(0xB6); // Display Function Control LCD_WR_DATA(0x0A); LCD_WR_DATA(0xA2); LCD_WR_REG(0xF2); // 3Gamma Function Disable LCD_WR_DATA(0x00); LCD_WR_REG(0x26); //Gamma curve selected LCD_WR_DATA(0x01); LCD_WR_REG(0xE0); //Set Gamma LCD_WR_DATA(0x0F); LCD_WR_DATA(0x2A); LCD_WR_DATA(0x28); LCD_WR_DATA(0x08); LCD_WR_DATA(0x0E); LCD_WR_DATA(0x08); LCD_WR_DATA(0x54); LCD_WR_DATA(0XA9); LCD_WR_DATA(0x43); LCD_WR_DATA(0x0A); LCD_WR_DATA(0x0F); LCD_WR_DATA(0x00); LCD_WR_DATA(0x00); LCD_WR_DATA(0x00); LCD_WR_DATA(0x00); LCD_WR_REG(0XE1); //Set Gamma LCD_WR_DATA(0x00); LCD_WR_DATA(0x15); LCD_WR_DATA(0x17); LCD_WR_DATA(0x07); LCD_WR_DATA(0x11); LCD_WR_DATA(0x06); LCD_WR_DATA(0x2B); LCD_WR_DATA(0x56); LCD_WR_DATA(0x3C); LCD_WR_DATA(0x05); LCD_WR_DATA(0x10); LCD_WR_DATA(0x0F); LCD_WR_DATA(0x3F); LCD_WR_DATA(0x3F); LCD_WR_DATA(0x0F); LCD_WR_REG(0x2B); LCD_WR_DATA(0x00);LCD_WR_DATA(0x00);LCD_WR_DATA(0x01);LCD_WR_DATA(0x3f);LCD_WR_REG(0x2A); LCD_WR_DATA(0x00);LCD_WR_DATA(0x00);LCD_WR_DATA(0x00);LCD_WR_DATA(0xef); LCD_WR_REG(0x11); //Exit Sleepdelay_ms(120);LCD_WR_REG(0x29); //display onLCD_direction(USE_HORIZONTAL);//设置LCD显示方向LCD_LED=1;//点亮背光 LCD_Clear(WHITE);//清全屏白色} /***************************************************************************** * @name :void LCD_SetWindows(u16 xStar, u16 yStar,u16 xEnd,u16 yEnd) * @date :2018-08-09 * @function :Setting LCD display window * @parameters :xStar:the bebinning x coordinate of the LCD display windowyStar:the bebinning y coordinate of the LCD display windowxEnd:the endning x coordinate of the LCD display windowyEnd:the endning y coordinate of the LCD display window * @retvalue :None******************************************************************************/ void LCD_SetWindows(u16 xStar, u16 yStar,u16 xEnd,u16 yEnd){LCD_WR_REG(lcddev.setycmd);LCD_WR_DATA(yStar>>8);LCD_WR_DATA(0x00FF&yStar);LCD_WR_DATA(yEnd>>8);LCD_WR_DATA(0x00FF&yEnd);LCD_WR_REG(lcddev.setxcmd);LCD_WR_DATA(xStar>>8);LCD_WR_DATA(0x00FF&xStar);LCD_WR_DATA(xEnd>>8);LCD_WR_DATA(0x00FF&xEnd); LCD_WriteRAM_Prepare();//开始写入GRAM} /***************************************************************************** * @name :void LCD_SetCursor(u16 Xpos, u16 Ypos) * @date :2018-08-09 * @function :Set coordinate value * @parameters :Xpos:the x coordinate of the pixelYpos:the y coordinate of the pixel * @retvalue :None******************************************************************************/ void LCD_SetCursor(u16 Xpos, u16 Ypos){ LCD_SetWindows(Xpos,Ypos,Xpos,Ypos);} /***************************************************************************** * @name :void LCD_direction(u8 direction) * @date :2018-08-09 * @function :Setting the display direction of LCD screen * @parameters :direction:0-0 degree 1-90 degree2-180 degree3-270 degree * @retvalue :None******************************************************************************/ void LCD_direction(u8 direction){ lcddev.setxcmd=0x2A;lcddev.setycmd=0x2B;lcddev.wramcmd=0x2C;switch(direction){ case 0: lcddev.width=LCD_W;lcddev.height=LCD_H;LCD_WriteReg(0x36,(1<<3)|(0<<6)|(0<<7));//BGR==1,MY==0,MX==0,MV==0break;case 1:lcddev.width=LCD_H;lcddev.height=LCD_W;LCD_WriteReg(0x36,(1<<3)|(0<<7)|(1<<6)|(1<<5));//BGR==1,MY==1,MX==0,MV==1break;case 2: lcddev.width=LCD_W;lcddev.height=LCD_H;LCD_WriteReg(0x36,(1<<3)|(1<<6)|(1<<7));//BGR==1,MY==0,MX==0,MV==0break;case 3:lcddev.width=LCD_H;lcddev.height=LCD_W;LCD_WriteReg(0x36,(1<<3)|(1<<7)|(1<<5));//BGR==1,MY==1,MX==0,MV==1break;default:break;}} void LCD_DrawFRONT_COLOR(u16 x,u16 y,u16 color){LCD_SetWindows(x,y,x,y);Lcd_WriteData_16Bit(color); }（3）SPI.h头文件
#include \"sys.h\" #ifndef _SPI_H_#define _SPI_H_ //本测试程序使用的是硬件SPI接口驱动//除了SPI时钟信号以及SPI读、写信号引脚不可更改，其他引脚都可以更改//SPI的时钟引脚定义固定为PB13//SPI的读数据引脚定义固定为PB14//SPI的写数据引脚定义固定为PB15 u8 SPI_WriteByte(SPI_TypeDef* SPIx,u8 Byte);void SPI2_Init(void);void SPI_SetSpeed(SPI_TypeDef* SPIx,u8 SpeedSet); #endif（4）SPI.c文件
#include \"spi.h\"#include \"stm32f10x_spi.h\" /***************************************************************************** * @name :u8 SPI_WriteByte(SPI_TypeDef* SPIx,u8 Byte) * @date :2018-08-09 * @function :Write a byte of data using STM32\'s hardware SPI * @parameters :SPIx: SPI type,x for 1,2,3 Byte:Data to be written * @retvalue :Data received by the bus******************************************************************************/u8 SPI_WriteByte(SPI_TypeDef* SPIx,u8 Byte){while((SPIx->SR&SPI_I2S_FLAG_TXE)==RESET);//等待发送区空 SPIx->DR=Byte; //发送一个byte while((SPIx->SR&SPI_I2S_FLAG_RXNE)==RESET);//等待接收完一个byte return SPIx->DR; //返回收到的数据} /***************************************************************************** * @name :void SPI_SetSpeed(SPI_TypeDef* SPIx,u8 SpeedSet) * @date :2018-08-09 * @function :Set hardware SPI Speed * @parameters :SPIx: SPI type,x for 1,2,3 SpeedSet:0-high speed 1-low speed * @retvalue :None******************************************************************************/void SPI_SetSpeed(SPI_TypeDef* SPIx,u8 SpeedSet){SPIx->CR1&=0XFFC7;if(SpeedSet==1)//高速{SPIx->CR1|=SPI_BaudRatePrescaler_2;//Fsck=Fpclk/2}else//低速{SPIx->CR1|=SPI_BaudRatePrescaler_32; //Fsck=Fpclk/32}SPIx->CR1|=1<<6; //SPI设备使能} /***************************************************************************** * @name :void SPI2_Init(void) * @date :2018-08-09 * @function :Initialize the STM32 hardware SPI2 * @parameters :None * @retvalue :None******************************************************************************/void SPI2_Init(void){SPI_InitTypeDef SPI_InitStructure;GPIO_InitTypeDef GPIO_InitStructure; //配置SPI2管脚RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOB, ENABLE);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_15;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); //SPI2配置选项RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 ,ENABLE); SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;SPI_InitStructure.SPI_Mode = SPI_Mode_Master;SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;SPI_InitStructure.SPI_CRCPolynomial = 7;SPI_Init(SPI2, &SPI_InitStructure); //使能SPI2SPI_Cmd(SPI2, ENABLE); }五、视频展示
（完整资源及代码见文末链接）
如下视频是实物展示，按照上述接线并下载对应代码，即可实现如下功能。能满足基本显示功能，受限于传输速率，整体刷新率还有待提高
STM32--基于STM32F103C8T6的OV7670摄像头显示
六、附完整资源链接
百度网盘链接: https://pan.baidu.com/s/1ml5nV_ZgJFbsqFhIHR61rA?pwd=r6ta
提取码: r6ta
