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：
| OV7670摄像头（带FIFO） | STM32F103C8T6 |
|---|---|
| VCC | 3.3V |
| GND | GND |
| DC0-7 | PA0-PA7 |
| VSYNC | PA8 |
| RCK | PA11 |
| CS(OE) | PA15 |
| WRST | PB0 |
| RRST | PB1 |
| SIOC | PB10 |
| SIOD | PB11 |
| WREN(WR/WEN) | PB12 |
2.2寸TFT SPI屏幕和C8T6的接线图如下：
| 2.2寸TFT SPI屏幕 | STM32F103C8T6 |
|---|---|
| VCC | 3.3V |
| GND | GND |
| SDI(MOSI) | PB15 |
| SDO(MISO) | PB14 |
| SCK | PB13 |
| DC/RS | PB8 |
| RST | PB7 |
| CS | PB6 |
| LED | PB5 |
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
c
#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_WRST PBout(0) //写指针复位
#define OV7670_WREN PBout(12) //写入FIFO使能
#define OV7670_RCK_H GPIOA->BSRR=1<<11//设置读数据时钟高电平
#define OV7670_RCK_L GPIOA->BRR=1<<11 //设置读数据时钟低电平
#define OV7670_RRST PBout(1) //读指针复位
#define OV7670_CS PAout(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
c
#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 - OE
GPIO_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 - WRST
GPIO_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home
void 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://sunny
reg13val=0XE5;
reg01val=0X5A;
reg02val=0X5C;
break;
case 2://cloudy
reg13val=0XE5;
reg01val=0X58;
reg02val=0X60;
break;
case 3://office
reg13val=0XE5;
reg01val=0X84;
reg02val=0X4c;
break;
case 4://home
reg13val=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
//4,2
void 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://-2
reg4f5054val=0X40;
reg52val=0X11;
reg53val=0X2F;
break;
case 1://-1
reg4f5054val=0X66;
reg52val=0X1B;
reg53val=0X4B;
break;
case 3://1
reg4f5054val=0X99;
reg52val=0X28;
reg53val=0X71;
break;
case 4://2
reg4f5054val=0XC0;
reg52val=0X33;
reg53val=0X8D;
break;
}
SCCB_WR_Reg(0X4F,reg4f5054val); //色彩矩阵系数1
SCCB_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
//4,2
void OV7670_Brightness(u8 bright)
{
u8 reg55val=0X00;//默认就是bright=2
switch(bright)
{
case 0://-2
reg55val=0XB0;
break;
case 1://-1
reg55val=0X98;
break;
case 3://1
reg55val=0X18;
break;
case 4://2
reg55val=0X30;
break;
}
SCCB_WR_Reg(0X55,reg55val); //亮度调节
}
//对比度设置
//0:-2
//1:-1
//2,0
//3,1
//4,2
void OV7670_Contrast(u8 contrast)
{
u8 reg56val=0X40;//默认就是contrast=2
switch(contrast)
{
case 0://-2
reg56val=0X30;
break;
case 1://-1
reg56val=0X38;
break;
case 3://1
reg56val=0X50;
break;
case 4://2
reg56val=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
c
#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 ID
u8 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
#define LCD_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）
#define LCD_CS_SET GPIO_TYPE->BSRR=1<<LCD_CS //片选端口 PB11
#define LCD_RS_SET GPIO_TYPE->BSRR=1<<LCD_RS //数据/命令 PB10
#define LCD_RST_SET GPIO_TYPE->BSRR=1<<LCD_RST //复位 PB12
//GPIO复位（拉低）
#define LCD_CS_CLR GPIO_TYPE->BRR=1<<LCD_CS //片选端口 PB11
#define LCD_RS_CLR GPIO_TYPE->BRR=1<<LCD_RS //数据/命令 PB10
#define LCD_RST_CLR GPIO_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 GBLUE 0X07FF
#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
c
#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; //GPIOB9,10,11,12
GPIO_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); //3F
LCD_WR_DATA(0x30); //3C
LCD_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 Sleep
delay_ms(120);
LCD_WR_REG(0x29); //display on
LCD_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 window
yStar:the bebinning y coordinate of the LCD display window
xEnd:the endning x coordinate of the LCD display window
yEnd: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 pixel
Ypos: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 degree
2-180 degree
3-270 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==0
break;
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==1
break;
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==0
break;
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==1
break;
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
c
#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
c
#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SPI2
SPI_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