stm32 dma 读取io数据 代码

可以直接回答，以下是一个示例代码：

#include "stm32f10x.h"

int main(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  DMA_InitTypeDef DMA_InitStructure;

  // 使能 DMA 时钟
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

  // 配置 DMA 通道
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&GPIOA->IDR;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)io_data;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = IO_DATA_SIZE;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);

  // 配置 GPIO 为输入模式
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  // 启动 DMA 传输
  DMA_Cmd(DMA1_Channel1, ENABLE);

  while (1)
  {
    // 读取 io_data 数组中的数据
    for (int i = 0; i < IO_DATA_SIZE; i++)
    {
      printf("%d ", io_data[i]);
    }
    printf("\n");
  }
}

希望能对你有所帮助！