WebCN104850517B CN201510258206.9A CN201510258206A CN104850517B CN 104850517 B CN104850517 B CN 104850517B CN 201510258206 A CN201510258206 A CN 201510258206A CN 104850517 B CN104850517 B CN 104850517B Authority CN China Prior art keywords dma message data descriptor dma descriptor source address Prior … WebJan 19, 2024 · 目录1.上节回顾2.描述符详解2.1描述符数据结构2.2描述符各个字段详解3.xdma描述符fifo4.xdma描述符旁路5.下节内容1.上节回顾上节我们讲解了描述符的概念 …
CN104850517A - 一种dma传输报文数据的方法及装置 - Google …
WebApr 6, 2024 · 在stm32f2x7_eth.c中定义了两个DMA描述符数组,一个用于DMA接收,一个用于DMA发送,如下: . 接收和发送描述的大小通过宏ETH_RXBUFNB和ETH_TXBUFNB来定义,默认都为5。 我们知道以链接结构太网描述符的Buffer1Addr成员用来存放缓冲区地址,那么数据缓冲区在哪里? WebMay 12, 2024 · 启动传输. 获取传输描述符之后,通过dmaengine_submit API将描述符放到传输队列,返回唯一识别该标志符的cookie,再调用dma_async_issue_pendingAPI启动传 … cheap jogger pants for guys
5.11. DMA描述符控制器寄存器 - Intel
WebApr 13, 2024 · I have found, that problem is with ETH DMA. Writing 1 to ETH_DMABMR_SR should reset it, and after reset this bit is cleaned by hardware. But this doesn't happen. The same thing with ETH_DMAOMR_FTF. It should clean FIFO and return to 0. But it also infinitely =1. When i try to send packet, i set OWN bit in descriptor and write to … WebJul 12, 2024 · 在ST提供的以太网驱动程序stm32f4x7_eth.c中使用的DMA描述符管理缓冲区,其连接结构描述如下图: 一个以太网数据包可以跨越一个或者多个DMA描述符。 一 … Web1- User can declare Ethernet descriptors and buffers in DTCM RAM (not cacheable memory) 2- User can insure D-Cache maintenance: CPU will inform/ be informed by Ethernet DMA when updates are done (using SCB_CleanDCache () or SCB_InvalidateDCache ()) 3- Use of MPU (Memory Protection Unit) to protect data … cyberduck mac破解