hchzdh 发表于 2019-7-14 06:04:13

STM32F407以太网发送一帧跨多个描述符

开发手册上说,以太网发送一帧可用跨多个描述符,如何实现?我找了网上还没有一个人这么做过,自己做了以下,无论怎样都不行,还望各路大神指教

shengcm0221 发表于 2019-7-16 16:55:58

学习了

butterflyspring 发表于 2019-8-19 16:49:41

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.
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