STM32H7b0X OSPI可以配置MDMA发送数据代码
时间: 2024-09-24 12:08:26 浏览: 55
STM32H7B0X系列微控制器集成了OSPI(On-chip Serial Peripheral Interface),它支持通过硬件DMA(Direct Memory Access)进行高速外设数据传输。以下是一个简单的示例代码片段,展示如何配置MDMA发送数据:
```c
#include "stm32h7xx_hal.h"
// 假设我们要从Flash读取数据到内存
void ConfigureOSPI_DMA(uint32_t source_address, uint32_t destination_address, uint16_t transfer_size)
{
DMA_HandleTypeDef hdma_ospi;
// 初始化DMA结构体
hdma_ospi.Init.Request = DMA_REQUEST奥斯皮请求源; // 根据实际需求替换
hdma_ospi.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_ospi.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_ospi.Init.MemInc = DMA_MINC_ENABLE;
hdma_ospi.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_ospi.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_ospi.Init.Mode = DMA_NORMAL;
hdma_ospi.Init.Priority = DMA_PRIORITY_HIGH;
hdma_ospi.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
hdma_ospi.Init.BurstLength = DMA_BURSTLENGTH_4BYTES;
hdma_ospi.Init Transfer Size = (transfer_size / sizeof(uint16_t)); // 数据块大小
// 配置DMA通道
HAL_DMA_Init(&hdma_ospi);
// 将DMA链表连接到OSPI外设上
__HAL_LINKDMA(&OSPIx, hdmarx, hdma_ospi);
__HAL_OSPI_SET_DMAREQUEST_SOURCE(OSPIx, DMA_REQUEST奥斯皮请求源); // 设置DMA请求源
// 开启OSPI传输
HAL_OSPI_StartTransfer(OSPIx, (uint8_t*)destination_address, (uint8_t*)source_address, transfer_size);
// 开启DMA传输
HAL_DMA_Start_IT(&hdma_ospi);
}
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