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楼主 |
发表于 2025-5-21 09:39:20
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感谢硬汉解惑。目前我这边还遇见了一个问题。目前项目上是使用DCMI与FPGA做大数据内容交互，我开辟了两倍内容的缓存区，我想在DMA半满中断和全满中断时分别对上半部分缓存和下半缓存处理，这样达到双缓存的目的。但是目前我发现每次DMA中断进入时，半满中断的标志位和全满中断的标志位同时触发？
下面是我的代码配置。(因为加密问题。无法上传完整工程)
[mw_shl_code=c,true]/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file dcmi.c
* @brief This file provides code for the configuration
* of the DCMI instances.
******************************************************************************
* @attention
*
* Copyright (c) 2024 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "dcmi.h"
/* USER CODE BEGIN 0 */
#include "string.h"
#include "stdlib.h"
ALIGN_32BYTES(volatile s_DCMI_ORIGINAL_DATA DCMI_DataBuffer[DCMI_PACKET_FRAMES*2]) __attribute__((section(".SRAM2")));
/* USER CODE END 0 */
DCMI_HandleTypeDef hdcmi;
DMA_HandleTypeDef hdma_dcmi;
/* DCMI init function */
void MX_DCMI_Init(void)
{
/* USER CODE BEGIN DCMI_Init 0 */
/* USER CODE END DCMI_Init 0 */
/* USER CODE BEGIN DCMI_Init 1 */
/* USER CODE END DCMI_Init 1 */
hdcmi.Instance = DCMI;
hdcmi.Init.SynchroMode = DCMI_SYNCHRO_HARDWARE;
hdcmi.Init.PCKPolarity = DCMI_PCKPOLARITY_RISING;
hdcmi.Init.VSPolarity = DCMI_VSPOLARITY_HIGH;
hdcmi.Init.HSPolarity = DCMI_HSPOLARITY_HIGH;
hdcmi.Init.CaptureRate = DCMI_CR_ALL_FRAME;
hdcmi.Init.ExtendedDataMode = DCMI_EXTEND_DATA_8B;
hdcmi.Init.JPEGMode = DCMI_JPEG_DISABLE;
hdcmi.Init.ByteSelectMode = DCMI_BSM_ALL;
hdcmi.Init.ByteSelectStart = DCMI_OEBS_ODD;
hdcmi.Init.LineSelectMode = DCMI_LSM_ALL;
hdcmi.Init.LineSelectStart = DCMI_OELS_ODD;
if (HAL_DCMI_Init(&hdcmi) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN DCMI_Init 2 */
/* USER CODE END DCMI_Init 2 */
}
void HAL_DCMI_MspInit(DCMI_HandleTypeDef* dcmiHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(dcmiHandle->Instance==DCMI)
{
/* USER CODE BEGIN DCMI_MspInit 0 */
/* USER CODE END DCMI_MspInit 0 */
/* DCMI clock enable */
__HAL_RCC_DCMI_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**DCMI GPIO Configuration
PE4 ------> DCMI_D4
PA4 ------> DCMI_HSYNC
PA6 ------> DCMI_PIXCLK
PA9 ------> DCMI_D0
PA10 ------> DCMI_D1
PD3 ------> DCMI_D5
PB7 ------> DCMI_VSYNC
PB8 ------> DCMI_D6
PB9 ------> DCMI_D7
PE0 ------> DCMI_D2
PE1 ------> DCMI_D3
*/
GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_0|GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF13_DCMI;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_6|GPIO_PIN_9|GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF13_DCMI;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF13_DCMI;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF13_DCMI;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* DCMI DMA Init */
/* DCMI Init */
hdma_dcmi.Instance = DMA2_Stream1;
hdma_dcmi.Init.Request = DMA_REQUEST_DCMI;
hdma_dcmi.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_dcmi.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_dcmi.Init.MemInc = DMA_MINC_ENABLE;
hdma_dcmi.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
hdma_dcmi.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
hdma_dcmi.Init.Mode = DMA_CIRCULAR;
hdma_dcmi.Init.Priority = DMA_PRIORITY_VERY_HIGH;
hdma_dcmi.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_dcmi) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(dcmiHandle,DMA_Handle,hdma_dcmi);
/* DCMI interrupt Init */
HAL_NVIC_SetPriority(DCMI_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DCMI_IRQn);
/* USER CODE BEGIN DCMI_MspInit 1 */
/* USER CODE END DCMI_MspInit 1 */
}
}
void HAL_DCMI_MspDeInit(DCMI_HandleTypeDef* dcmiHandle)
{
if(dcmiHandle->Instance==DCMI)
{
/* USER CODE BEGIN DCMI_MspDeInit 0 */
/* USER CODE END DCMI_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_DCMI_CLK_DISABLE();
/**DCMI GPIO Configuration
PE4 ------> DCMI_D4
PA4 ------> DCMI_HSYNC
PA6 ------> DCMI_PIXCLK
PA9 ------> DCMI_D0
PA10 ------> DCMI_D1
PD3 ------> DCMI_D5
PB7 ------> DCMI_VSYNC
PB8 ------> DCMI_D6
PB9 ------> DCMI_D7
PE0 ------> DCMI_D2
PE1 ------> DCMI_D3
*/
HAL_GPIO_DeInit(GPIOE, GPIO_PIN_4|GPIO_PIN_0|GPIO_PIN_1);
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4|GPIO_PIN_6|GPIO_PIN_9|GPIO_PIN_10);
HAL_GPIO_DeInit(GPIOD, GPIO_PIN_3);
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9);
/* DCMI DMA DeInit */
HAL_DMA_DeInit(dcmiHandle->DMA_Handle);
/* DCMI interrupt Deinit */
HAL_NVIC_DisableIRQ(DCMI_IRQn);
/* USER CODE BEGIN DCMI_MspDeInit 1 */
/* USER CODE END DCMI_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
size_t callback = 0;
void dcmi_halfcaplt(DMA_HandleTypeDef *_hdma)
{
callback++;
}
/**********************************************************************************************************
*
图片是DMA中断进入时的状态
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发表于 2025-5-20 10:36:10
发表于 2025-5-21 06:44:51
