楼主你好，在官方的参考手册上有描述，一帧只能有一个描述符。因此建议你再核对一下信息。以下是描述： A data buffer resides in the Host’s physical memory space, and consists of an entire frame or part of a frame, but cannot exceed a single frame. Buffers contain only data. The buffer status is maintained in the descriptor. Data chaining refers to frames that span multiple data buffers. However, a single descriptor cannot span multiple frames. The DMA skips to the next frame buffer when the end of frame is detected. Data chaining can be enabled or disabled.
