DCMI.zip_DCMI_dcmi全称_dma 缓冲_f407DCMI_stm32f407 dcmi

#include "sys.h" #include "dcmi.h" #include "lcd.h" #include "led.h" #include "ov2640.h" ////////////////////////////////////////////////////////////////////////////////// //本程序只供学习使用，未经作者许可，不得用于其它任何用途 //ALIENTEK STM32F407开发板 //DCMI 驱动代码 //正点原子@ALIENTEK //技术论坛:www.openedv.com //创建日期:2014/5/14 //版本：V1.0 //版权所有，盗版必究。 //Copyright(C) 广州市星翼电子科技有限公司 2014-2024 //All rights reserved ////////////////////////////////////////////////////////////////////////////////// u8 ov_frame=0; //帧率 u8 ov_flag=0; u8 dma_freebuf_ok = 0; DCMI_InitTypeDef DCMI_InitStructure; //DCMI中断服务函数 void DCMI_IRQHandler(void) { if(DCMI_GetITStatus(DCMI_IT_FRAME)==SET)//捕获到一帧图像 { ov_flag=1; DCMI_ClearITPendingBit(DCMI_IT_FRAME);//清除帧中断 LED1=!LED1; ov_frame++; DCMI_Stop(); } } //DCMI DMA配置 //DMA_Memory0BaseAddr:存储器地址 将要存储摄像头数据的内存地址(也可以是外设地址) //DMA_BufferSize:存储器长度 0~65535 //DMA_MemoryDataSize:存储器位宽 //DMA_MemoryDataSize:存储器位宽 @defgroup DMA_memory_data_size :DMA_MemoryDataSize_Byte/DMA_MemoryDataSize_HalfWord/DMA_MemoryDataSize_Word //DMA_MemoryInc:存储器增长方式 @defgroup DMA_memory_incremented_mode /** @defgroup DMA_memory_incremented_mode : DMA_MemoryInc_Enable/DMA_MemoryInc_Disable void DCMI_DMA_Init(u32 DMA_Memory0BaseAddr,u32 DMA_Memory1BaseAddr,u16 DMA_BufferSize,u32 DMA_MemoryDataSize,u32 DMA_MemoryInc) { DMA_InitTypeDef DMA_InitStructure; NVIC_InitTypeDef NVIC_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 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_DoubleBufferModeConfig(DMA2_Stream1,DMA_Memory1BaseAddr,DMA_Memory_1); // DMA_DoubleBufferModeCmd(DMA2_Stream1,ENABLE); DMA_Init(DMA2_Stream1, &DMA_InitStructure);//初始化DMA Stream dma_freebuf_ok = 0; NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream1_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_ITConfig(DMA2_Stream1,DMA_IT_TC,ENABLE); } void DMA2_Stream1_IRQHandler(void) { if(DMA_GetITStatus(DMA2_Stream1,DMA_IT_TCIF1) != RESET) { DMA_ClearITPendingBit(DMA2_Stream1,DMA_IT_TCIF1); dma_freebuf_ok = 1; } } //DCMI初始化 void My_DCMI_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; 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;////DCMI_CaptureRate_All_Frame;//DCMI_CaptureRate_1of4_Frame;//全帧捕获 DCMI_InitStructure.DCMI_ExtendedDataMode= DCMI_ExtendedDataMode_8b;//8位数据格式 DCMI_InitStructure.DCMI_HSPolarity= DCMI_HSPolarity_Low;//HSYNC 低电平有效 DCMI_InitStructure.DCMI_PCKPolarity= DCMI_PCKPolarity_Rising;//PCLK 上升沿有效 DCMI_InitStructure.DCMI_SynchroMode= DCMI_SynchroMode_Hardware;//硬件同步HSYNC,VSYNC DCMI_InitStructure.DCMI_VSPolarity=DCMI_VSPolarity_Low;//VSYNC 低电平有效 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、 } //DCMI,启动传输 void DCMI_Start(void) { // LCD_SetCursor(0,0); // LCD_WriteRAM_Prepare(); //开始写入GRAM DMA_Cmd(DMA2_Stream1, ENABLE);//开启DMA2,Stream1 DCMI_CaptureCmd(ENABLE);//DCMI捕获使能 } //DCMI,关闭传输 void DCMI_Stop(void) { DCMI_CaptureCmd(DISABLE);//DCMI捕获使关闭 while(DCMI->CR&0X01); //等待传输结束 DMA_Cmd(DMA2_Stream1,DISABLE);//关闭DMA2,Stream1 } //////////////////////////////////////////////////////////////////////////////// //以下两个函数,供usmart调用,用于调试代码 //DCMI设置显示窗口 //sx,sy;LCD的起始坐标 //width,height:LCD显示范围. void DCMI_Set_Window(u16 sx,u16 sy,u16 width,u16 height) { DCMI_Stop(); LCD_Clear(WHITE); LCD_Set_Window(sx,sy,width,height); OV2640_OutSize_Set(width,height); LCD_SetCursor(0,0); LCD_WriteRAM_Prepare(); //开始写入GRAM DMA_Cmd(DMA2_Stream1,ENABLE); //开启DMA2,Stream1 DCMI_CaptureCmd(ENABLE);//DCMI捕获使能 } //通过usmart调试,辅助测试用. //pclk/hsync/vsync:三个信号的有限电平设置 void DCMI_CR_Set(u8 pclk,u8 hsync,u8 vsync)