问答 #24970 - LogiCORE RapidIO v4.1 - Control Symbol might be lost when reinitialization is forced

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LogiCORE RapidIO v4.1 - Control Symbol might be lost when reinitialization is forced

问答编号#	24970
专题	IP-SystemIO RapidIO
最后更新日期	2007-03-29 00:00:00.0
记录状态	Active
器件	-
设计工具	-
IP	-
开发板与电缆	-

疑问描述

Keywords: serial, high, speed, high-speed, PHY, logical, design environment, rio, rapid, IO, MGT, 9.1i, I/O, control, symbol, dropped

A control symbol that has been scheduled into the transmit pipeline might be lost when reinitialization is forced. This is not an issue for most control symbols, as auto-recovery is built in to the RapidIO protocol. However, it can be an issue when dealing with Link Request/Link Response control symbols.

解决方案

Xilinx recommends setting the "Additional Link Requests Before Fatal" value on the Physical Configuration page of the GUI to a non-zero value. Most other vendors allow this functionality as well. By allowing multiple Link Requests prior to transitioning to a fatal error state, it will allow the RapidIO link to recover in the unlikely event that a Link Request or Link Response is lost.