用STM32F4的DCMI+DMA传输OV7670 QVGA输出的数据到屏幕，寄存器改来改去始终颜色不对，求教各位大神
效果图在代码后面
//初始化寄存器序列及其对应的值
const u8 ov7670_init_reg_tbl[][2]=
{
{0x3a, 0x04},
{0x40, 0xd0},
{0x12, 0x14}, //COM7
//输出窗口设置
{0x32, 0x80},//HREF control bit[2:0] HREF start 3 LSB bit[5:3] HSTOP HREF end 3LSB
{0x17, 0x16},//HSTART start high 8-bit MSB
{0x18, 0x04},//HSTOP end high 8-bit
{0x19, 0x02},//VSTART start high 8-bit MSB
{0x1a, 0x7A},//VSTOP end high 8-bit
{0x03, 0x05},//帧竖直方向控制VRFE
{0x0c, 0x0C},
{0x3e, 0x00},//
{0x42, 0x00},//0X08:彩条测试
{0x70, 0x3A},//彩条测试
{0x71, 0x35},//0X85:彩条测试
{0x72, 0x11},
{0x73, 0x00},
{0xa2, 0x02},
{0x6b, 0x4a},//PLL 重要参数 0x0a:不倍频，0x4a:4倍频
{0x11, 0x83},//0x01：不分频
{0x7a, 0x20},
{0x7b, 0x1c},
{0x7c, 0x28},
{0x7d, 0x3c},
{0x7e, 0x55},
{0x7f, 0x68},
{0x80, 0x76},
{0x81, 0x80},
{0x82, 0x88},
{0x83, 0x8f},
{0x84, 0x96},
{0x85, 0xa3},
{0x86, 0xaf},
{0x87, 0xc4},
{0x88, 0xd7},
{0x89, 0xe8},
{0x13, 0xe0},
{0x00, 0x00},//AGC
{0x10, 0x00},
{0x0d, 0x00},//全窗口， 位[5:4]: 01 半窗口，10 1/4窗口，11 1/4窗口
{0x14, 0x28},//0x38, limit the max gain
{0xa5, 0x05},
{0xab, 0x07},
{0x24, 0x75},
{0x25, 0x63},
{0x26, 0xA5},
{0x9f, 0x78},
{0xa0, 0x68},
{0xa1, 0x03},//0x0b,
{0xa6, 0xdf},//0xd8,
{0xa7, 0xdf},//0xd8,
{0xa8, 0xf0},
{0xa9, 0x90},
{0xaa, 0x94},
{0x13, 0xe5},
{0x0e, 0x61},
{0x0f, 0x4b},
{0x16, 0x02},
{0x1e, 0x27},//0x07,//图像输出镜像控制.0x07
{0x21, 0x02},
{0x22, 0x91},
{0x29, 0x07},
{0x33, 0x0b},
{0x35, 0x0b},
{0x37, 0x1d},
{0x38, 0x71},
{0x39, 0x2a},
{0x3c, 0x78},
{0x4d, 0x40},
{0x4e, 0x20},
{0x69, 0x55},//0X55
{0x74, 0x19},
{0x8d, 0x4f},
{0x8e, 0x00},
{0x8f, 0x00},
{0x90, 0x00},
{0x91, 0x00},
{0x92, 0x00},//0x19,//0x66
{0x96, 0x00},
{0x9a, 0x80},
{0xb0, 0x84},
{0xb1, 0x0c},
{0xb2, 0x0e},
{0xb3, 0x82},
{0xb8, 0x0a},
{0x43, 0x14},
{0x44, 0xf0},
{0x45, 0x34},
{0x46, 0x58},
{0x47, 0x28},
{0x48, 0x3a},
{0x59, 0x88},
{0x5a, 0x88},
{0x5b, 0x44},
{0x5c, 0x67},
{0x5d, 0x49},
{0x5e, 0x0e},
{0x64, 0x04},
{0x65, 0x20},
{0x66, 0x05},
{0x94, 0x04},
{0x95, 0x08},
{0x6c, 0x0a},
{0x6d, 0x55},
{0x4f, 0x80},
{0x50, 0x80},
{0x51, 0x00},
{0x52, 0x22},
{0x53, 0x5e},
{0x54, 0x80},
{0x09, 0x03},//驱动能力最大
{0x6e, 0x11},//
{0x6f, 0x9f},//0x9e for advance AWB
{0x6a, 0x40},
{0x01, 0x40},
{0x02, 0x40},
{0x13, 0xe7},
{0x15, 0x00}, //重要参数(改)HSYNC\VSYNC\HREF电平控制
{0x55, 0x0a},//亮度
{0x56, 0x4F},//对比度 0x40
{0x58, 0x9e},
{0x41, 0x08},
{0x3f, 0x00},//边缘增强调整
{0x75, 0x05},
{0x76, 0xe1},
{0x4c, 0x00},//噪声抑制强度
{0x77, 0x01},
{0x3d, 0xc2},//0xc0,
{0x4b, 0x09},
{0xc9, 0x60},
{0x41, 0x38},
{0x34, 0x11},
{0x3b, 0x02},//0x00,//0x02,
{0xa4, 0x89},//0x88,
{0x96, 0x00},
{0x97, 0x30},
{0x98, 0x20},
{0x99, 0x30},
{0x9a, 0x84},
{0x9b, 0x29},
{0x9c, 0x03},
{0x9d, 0x4c},
{0x9e, 0x3f},
{0x78, 0x04},
{0x79, 0x01},
{0xc8, 0xf0},
{0x79, 0x0f},
{0xc8, 0x00},
{0x79, 0x10},
{0xc8, 0x7e},
{0x79, 0x0a},
{0xc8, 0x80},
{0x79, 0x0b},
{0xc8, 0x01},
{0x79, 0x0c},
{0xc8, 0x0f},
{0x79, 0x0d},
{0xc8, 0x20},
{0x79, 0x09},
{0xc8, 0x80},
{0x79, 0x02},
{0xc8, 0xc0},
{0x79, 0x03},
{0xc8, 0x40},
{0x79, 0x05},
{0xc8, 0x30},
{0x79, 0x26},
{0x09, 0x02},
{0x3b, 0x42},//0x82,//0xc0,//0xc2, //night mode
//
///////////////////////////////////////////////////////////////////////
}; //DCMI中断服务函数 void DCMI_IRQHandler(void) { if(DCMI->MISR&0X01)//捕获到一帧图像 { //jpeg_data_process();//jpeg数据处理 DCMI->ICR|=1<<0; //清除帧中断 LED1=!LED1; ov_frame++; } } //DCMI DMA配置 //mem0addr:存储器地址0 将要存储摄像头数据的内存地址(也可以是外设地址) //mem1addr:存储器地址1 当只使用mem0addr的时候,该值必须为0 //memsize:存储器长度 0~65535 //memblen:存储器位宽 0,8位,1,16位,2,32位 //meminc:存储器增长方式,0,不增长;1,增长 void DCMI_DMA_Init(u32 mem0addr,u32 mem1addr,u16 memsize,u8 memblen,u8 meminc) { RCC->AHB1ENR|=1<<22; //DMA2时钟使能 while(DMA2_Stream1->CR&0X01);//等待DMA2_Stream1可配置 DMA2->LIFCR|=0X3D<<6*1; //清空通道1上所有中断标志 //DMA2_Stream1->FCR=0X00000021;//设置为默认值 DMA2_Stream1->FCR=0X0000000C;//设置为默认值 DMA2_Stream1->PAR=(u32)&DCMI->DR;//外设地址为:DCMI->DR DMA2_Stream1->M0AR=mem0addr; //mem0addr作为目标地址0 DMA2_Stream1->M1AR=mem1addr; //mem1addr作为目标地址1 DMA2_Stream1->NDTR=memsize; //传输长度为memsize DMA2_Stream1->CR=0; //先全部复位CR寄存器值 DMA2_Stream1->CR|=0<<6; //外设到存储器模式 DMA2_Stream1->CR|=1<<8; //循环模式 DMA2_Stream1->CR|=0<<9; //外设非增量模式 DMA2_Stream1->CR|=meminc<<10; //存储器增量模式 DMA2_Stream1->CR|=2<<11; //外设数据长度:32位 DMA2_Stream1->CR|=memblen<<13; //存储器位宽,8/16/32bit DMA2_Stream1->CR|=2<<16; //高优先级 DMA2_Stream1->CR|=0<<21; //外设突发单次传输 DMA2_Stream1->CR|=0<<23; //存储器突发单次传输 DMA2_Stream1->CR|=1<<25; //通道1 DCMI通道 if(mem1addr)//双缓冲的时候,才需要开启 { DMA2_Stream1->CR|=1<<18; //双缓冲模式 DMA2_Stream1->CR|=1<<4; //开启传输完成中断 MY_NVIC_Init(0,0,DMA2_Stream1_IRQn,2); //抢占1，子优先级3，组2 } } //DCMI初始化 void DCMI_Init(void) { //设置IO RCC->AHB1ENR|=1<<0; //使能外设PORTA时钟 RCC->AHB1ENR|=1<<1; //使能外设PORTB时钟 RCC->AHB1ENR|=1<<2; //使能外设PORTC时钟 RCC->AHB1ENR|=1<<4; //使能外设PORTE时钟 RCC->AHB2ENR|=1<<0; //能DCMI时钟 GPIO_Set(GPIOA,PIN4|PIN6,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_PU); //PA4/6 复用功能输出 GPIO_Set(GPIOB,PIN6|PIN7,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_PU); //PB6/7 复用功能输出 GPIO_Set(GPIOC,PIN6|PIN7|PIN8|PIN9|PIN11,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_PU);//PC6/7/8/9/11 复用功能输出 GPIO_Set(GPIOE,PIN5|PIN6,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_PU); //PE5/6 复用功能输出 GPIO_AF_Set(GPIOA,4,13); //PA4,AF13 DCMI_HSYNC GPIO_AF_Set(GPIOA,6,13); //PA6,AF13 DCMI_PCLK GPIO_AF_Set(GPIOB,7,13); //PB7,AF13 DCMI_VSYNC GPIO_AF_Set(GPIOC,6,13); //PC6,AF13 DCMI_D0 GPIO_AF_Set(GPIOC,7,13); //PC7,AF13 DCMI_D1 GPIO_AF_Set(GPIOC,8,13); //PC8,AF13 DCMI_D2 GPIO_AF_Set(GPIOC,9,13); //PC9,AF13 DCMI_D3 GPIO_AF_Set(GPIOC,11,13); //PC11,AF13 DCMI_D4 GPIO_AF_Set(GPIOB,6,13); //PB6,AF13 DCMI_D5 GPIO_AF_Set(GPIOE,5,13); //PE5,AF13 DCMI_D6 GPIO_AF_Set(GPIOE,6,13); //PE6,AF13 DCMI_D7 //清除原来的设置 DCMI->CR=0x0; DCMI->IER=0x0; DCMI->ICR=0x1F; DCMI->ESCR=0x0; DCMI->ESUR=0x0; DCMI->CWSTRTR=0x0; DCMI->CWSIZER=0x0; DCMI->CR|=0<<1; //连续模式 DCMI->CR|=0<<2; //全帧捕获 DCMI->CR|=0<<4; //硬件同步HSYNC,VSYNC DCMI->CR|=0<<5; //PCLK 下降沿有效 DCMI->CR|=0<<6; //HSYNC 低电平有效 DCMI->CR|=1<<7; //VSYNC 低电平有效 DCMI->CR|=0<<8; //捕获所有的帧 DCMI->CR|=0<<10; //8位数据格式 DCMI->IER|=1<<0; //开启帧中断 DCMI->CR|=1<<14; //DCMI使能 MY_NVIC_Init(0,0,DCMI_IRQn,2); //抢占1，子优先级2，组2 } //DCMI,启动传输 void DCMI_Start(void) { LCD_Scan_Dir(U2D_L2R); //从上到下,从左到右 LCD_SetCursor(0,0); LCD_WriteRAM_Prepare(); //开始写入GRAM DMA2_Stream1->CR|=1<<0; //开启DMA2,Stream1 DCMI->CR|=1<<0; //DCMI捕获使能 } //DCMI,关闭传输 void DCMI_Stop(void) { DCMI->CR&=~(1<<0); //DCMI捕获关闭 while(DCMI->CR&0X01); //等待传输结束 DMA2_Stream1->CR&=~(1<<0); //关闭DMA2,Stream1 }主函数主要部分：
while(OV7670_Init())//初始化OV2640
{
Show_Str(30,190,240,16,"OV7670 错误!",16,0);
delay_ms(200);
LCD_Fill(30,190,239,206,WHITE);
delay_ms(200);
LED1=!LED1;
}
Show_Str(30,190,200,16,"OV7670 正常",16,0);
delay_ms(500);
OV7670_Window_Set(12,176,240,320); //设置窗口
LCD_Set_Window(0,0,240,320);
DCMI_Init(); //DCMI配置
DCMI_DMA_Init((u32)&LCD->LCD_RAM,0,1,1,0);//DCMI DMA配置
DCMI_Start(); //启动传输
while(1)
{
}
