STM32+0V7670代码
时间: 2023-09-13 19:04:50 浏览: 116
### 回答1:
以下是使用STM32和OV7670模块进行图像采集和传输的基本代码,供参考:
```c
#include "stm32f10x.h"
#define DCMI_DR_ADDRESS 0x50050028
uint16_t buffer[240][320];
void DCMI_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
DCMI_InitTypeDef DCMI_InitStructure;
/* Enable DCMI GPIOs clocks */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOC | RCC_AHBPeriph_GPIOE, ENABLE);
/* Enable DCMI clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DCMI, ENABLE);
/* DCMI GPIO configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* DCMI configuration */
DCMI_InitStructure.DCMI_CaptureMode = DCMI_CaptureMode_SnapShot;
DCMI_InitStructure.DCMI_SynchroMode = DCMI_SynchroMode_Hardware;
DCMI_InitStructure.DCMI_PCKPolarity = DCMI_PCKPolarity_Rising;
DCMI_InitStructure.DCMI_VSPolarity = DCMI_VSPolarity_High;
DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_High;
DCMI_InitStructure.DCMI_CaptureRate = DCMI_CaptureRate_All_Frame;
DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_8b;
DCMI_Init(&DCMI_InitStructure);
/* DMA configuration */
DMA_DeInit(DMA2_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = DCMI_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 240*320;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA2_Channel1, &DMA_InitStructure);
/* DCMI Interrupt configuration */
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = DCMI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Configure and enable DCMI DMA interrupt */
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_ITConfig(DMA2_Channel1, DMA_IT_TC, ENABLE);
/* Enable DMA */
DMA_Cmd(DMA2_Channel1, ENABLE);
/* Enable DCMI */
DCMI_Cmd(ENABLE);
}
void DCMI_IRQHandler(void)
{
if (DCMI_GetITStatus(DCMI_IT_FRAME) != RESET)
{
DCMI_ClearITPendingBit(DCMI_IT_FRAME);
}
}
void DMA2_Channel1_IRQHandler(void)
{
if (DMA_GetITStatus(DMA2_IT_TC1) != RESET)
{
DMA_ClearITPendingBit(DMA2_IT_TC1);
/* Process image data */
}
}
int main(void)
{
DCMI_Config();
while(1);
}
```
需要注意的是,该代码仅提供基本的图像采集和传输功能,未包含图像处理和显示的相关代码。
### 回答2:
STM32 0V7670代码是指用于驱动OV7670摄像头模块的STM32代码。OV7670是一款常用的CMOS摄像头模块,可以通过I2C接口控制和读取图像数据。下面简要介绍一下STM32驱动OV7670的大致步骤。
首先,需要初始化STM32的相应外设。比如,使用GPIO口作为I2C的SCL和SDA引脚,并初始化相应的I2C外设。
其次,通过I2C总线与OV7670进行通信,配置摄像头的寄存器参数。OV7670有很多寄存器,可以设置图像的亮度、对比度、曝光时间等参数。
然后,需要设置STM32的DMA(直接存储器访问)和中断。DMA用于从摄像头模块读取图像数据,并将数据直接存储到内存中,减轻了CPU的负载。而中断用于通知CPU图像数据的读取完成。
最后,可以通过DMA传输完成后的回调函数或者中断服务程序获取图像数据,并进行处理或者显示。
需要注意的是,OV7670是一个比较低端的摄像头模块,图像质量可能会有限。因此,对于一些高要求的应用场景,可能需要使用更高性能的摄像头模块。
以上是大致的步骤和概述,具体的代码实现和详细说明可能需要根据具体的开发板和编程环境进行。
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