关于F407驱动ov7670摄像头的问题
OV7670寄存器初始化：
const u8 ov7670_init_reg_tbl[][2]=
{ {0x3a, 0x04},
{0x40, 0xd0},
{0x12, 0x14}, //COM7
{0x32, 0x80},
{0x17, 0x16},
{0x18, 0x04},
{0x19, 0x02},
{0x1a, 0x7a},//0x7a,
{0x03, 0x05},//0x0a,
{0x0c, 0x00},
{0x3e, 0x00},//
{0x70, 0x00},
{0x71, 0x01},
{0x72, 0x11},
{0x73, 0x00},//
{0xa2, 0x02},
{0x11, 0x81},
{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},
{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, 0x07},//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},
{0x6b, 0x0a},//PLL 重要参数 0x0a:不倍频，0x4a:4倍频
{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},
{0x6e, 0x11},
{0x6f, 0x9f},//0x9e for advance AWB
{0x6a, 0x40},
{0x01, 0x40},
{0x02, 0x40},
{0x13, 0xe7},
{0x15, 0x08}, //重要参数
{0x4f, 0x80},
{0x50, 0x80},
{0x51, 0x00},
{0x52, 0x22},
{0x53, 0x5e},
{0x54, 0x80},
{0x55, 0x0A},//亮度
{0x56, 0x4f},//对比度
{0x58, 0x9e},
{0x41, 0x08},
{0x3f, 0x05},//边缘增强调整
{0x75, 0x05},
{0x76, 0xe1},
{0x4c, 0x0F},//噪声抑制强度
{0x77, 0x0a},
{0x3d, 0xc2},//0xc0,
{0x4b, 0x09},
{0xc9, 0x60},
{0x41, 0x38},
{0x34, 0x11},
{0x3b, 0x0A},//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
};
摄像头接口初始化：
void My_DCMI_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;//暂时没有打开中断，先不管
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_GPIOE, ENABLE);//使能GPIOA B C E 时钟
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI,ENABLE);//使能DCMI时钟
//PA4/6初始化设置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_6;//PA4/6 复用功能输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //复用功能输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_6;// PB6/7 复用功能输出
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_11;//PC6/7/8/9/11 复用功能输出
GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6;//PE5/6 复用功能输出
GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化
GPIO_PinAFConfig(GPIOA,GPIO_PinSource4,GPIO_AF_DCMI); //PA4,AF13 DCMI_HSYNC
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_DCMI); //PA6,AF13 DCMI_PCLK
GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_DCMI); //PB7,AF13 DCMI_VSYNC
GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_DCMI); //PC6,AF13 DCMI_D0
GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_DCMI); //PC7,AF13 DCMI_D1
GPIO_PinAFConfig(GPIOC,GPIO_PinSource8,GPIO_AF_DCMI); //PC8,AF13 DCMI_D2
GPIO_PinAFConfig(GPIOC,GPIO_PinSource9,GPIO_AF_DCMI); //PC9,AF13 DCMI_D3
GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_DCMI);//PC11,AF13 DCMI_D4
GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_DCMI); //PB6,AF13 DCMI_D5
GPIO_PinAFConfig(GPIOE,GPIO_PinSource5,GPIO_AF_DCMI); //PE5,AF13 DCMI_D6
GPIO_PinAFConfig(GPIOE,GPIO_PinSource6,GPIO_AF_DCMI); //PE6,AF13 DCMI_D7
DCMI_DeInit();//清除原来的设置
DCMI_InitStructure.DCMI_CaptureMode=DCMI_CaptureMode_Continuous;//连续模式
DCMI_InitStructure.DCMI_CaptureRate=DCMI_CaptureRate_All_Frame;//全帧捕获
DCMI_InitStructure.DCMI_ExtendedDataMode= DCMI_ExtendedDataMode_8b;//8位数据格式
DCMI_InitStructure.DCMI_HSPolarity= DCMI_HSPolarity_High;//HSYNC
DCMI_InitStructure.DCMI_PCKPolarity= DCMI_PCKPolarity_Rising ;//PCLK 上升沿有效，改
DCMI_InitStructure.DCMI_SynchroMode= DCMI_SynchroMode_Hardware;//硬件同步HSYNC,VSYNC
DCMI_InitStructure.DCMI_VSPolarity=DCMI_VSPolarity_High;//VSYNC 高电平有效，、、、
DCMI_Init(&DCMI_InitStructure);
DCMI_ITConfig(DCMI_IT_FRAME,ENABLE);//开启帧中断
DCMI_Cmd(ENABLE); //DCMI使能
NVIC_InitStructure.NVIC_IRQChannel = DCMI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;//抢占优先级1
NVIC_InitStructure.NVIC_IRQChannelSubPriority =2; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
}
DMA初始化：
void DCMI_DMA_Init(u32 DMA_Memory0BaseAddr,u16 DMA_BufferSize,u32 DMA_MemoryDataSize,u32 DMA_MemoryInc)
{
DMA_InitTypeDef DMA_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);//DMA2时钟使能
DMA_DeInit(DMA2_Stream1);
while (DMA_GetCmdStatus(DMA2_Stream1) ！= DISABLE){}//等待DMA2_Stream1可配置
/* 配置 DMA Stream */
DMA_InitStructure.DMA_Channel = DMA_Channel_1; //通道1 DCMI通道
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&DCMI->DR;//外设地址为:DCMI->DR
DMA_InitStructure.DMA_Memory0BaseAddr = DMA_Memory0BaseAddr;//DMA 存储器0地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;//外设到存储器模式
DMA_InitStructure.DMA_BufferSize = DMA_BufferSize;//数据传输量
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设非增量模式，因为LCd的ram地址会自增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc;//存储器增量模式
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;//外设数据长度:32位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize;//存储器数据长度
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;// 使用循环模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High;//高优先级
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable; //FIFO模式
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;//使用全FIFO
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;//外设突发单次传输
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;//存储器突发单次传输
DMA_Init(DMA2_Stream1, &DMA_InitStructure);//初始化DMA Stream
}
main函数：
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置系统中断优先级分组2
delay_init(168); //初始化延时函数
uart_init(115200); //初始化串口波特率为115200
LED_Init(); //初始化LED
LCD_Init(); //LCD初始化
KEY_Init(); //按键初始
clock();
while(OV7670_Init())//初始化OV7670
{
LCD_ShowString(30,130,240,16,16,"OV7670 ERR");
delay_ms(200);
LCD_Fill(30,130,239,170,WHITE);
delay_ms(200);
}
LCD_ShowString(30,130,200,16,16,"OV7670 OK");
My_DCMI_Init(); //DCMI配置
DCMI_DMA_Init((u32)&LCD->LCD_RAM,1,DMA_MemoryDataSize_HalfWord,DMA_MemoryInc_Disable);//DCMI DMA配置
OV7670_Window_Set(10,174,240,320);
DCMI_Start(); //启动传输
}
void DCMI_Start(void)
{
LCD_SetCursor(0,0); //设置lcd的光标位置
LCD_WriteRAM_Prepare(); //要开始写GRAM了
DMA_Cmd(DMA2_Stream1, ENABLE);//开启DMA2,Stream1
DCMI_CaptureCmd(ENABLE);//DCMI捕获使能
}
请我您解决了吗，我也遇到同样问题了