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
#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
#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IOGPIO_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 - WRGPIO_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 - RCKGPIO_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); //SWDSCCB_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://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
//4,2
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://-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
//4,2
void OV7670_Brightness(u8 bright)
{u8 reg55val=0X00;//默认就是bright=2switch(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
//4,2
void OV7670_Contrast(u8 contrast)
{u8 reg56val=0X40;//默认就是contrast=2switch(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*2endy=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
#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
#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 addressLCD_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 pixely: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 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 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 degree1-90 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PB15u8 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 1,2,3Byte: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 1,2,3SpeedSet:0-high speed1-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