针对定制IP时候,会有一个综合方式(Synthesis Options)的选择:Global和Out-of-context,如下图 Global模式 如果选择的是全局综合选项,那IP生成的文件将会和其他的用户文件一起进行综合,这也就意味着,每一次用户文件被修改后,IP都会跟着一起综合一遍。 OCC模式 OOC是Vivado开发套件提供的一项技术,该综合模式本质上是一...
IP核就是典型的采用OOC技术的代表,配置好IP核后可以选择综合模式为global(与顶层设计一起综合)或Out-of-context(作为独立模块综合),最好的做法就是选择后者,以减少整体设计的综合运行时间。 OOC选项是Vivado给我们的默认选项,在OOC模式下,Vivado将会把生成的IP当成一个单独的模块来进行综合,生成.dcp (design checkp...
When upgrading a MIG 7Series design that has sys_clk set with "No Buffer" and running Out of Context (OOC) flow, synthesis fails with errors similar to the following: Starting RTL Elaboration : Time (s): cpu = 00:00:10 ; elapsed = 00:00:12 . Memory (MB): peak = 817.828 ; gain...
50599 - Vivado HLS - RTL implementation of the design results in XST reporting "ERROR:Portability:3 - This Xilinx application has run out of memory or has encountered a memory conflict" Description RTL implementation of the design results in XST reporting "ERROR:Portability:3 - This Xilinx appli...
网络通信中的PHY芯片接口种类有很多,之前接触过GMII接口的PHY芯片RTL8211EG。但GMII接口数量较多,本文使用RGMII接口的88E1512搭建网络通信系统。这类接口总线位宽小,可以降低电路成本,在实际项目中应用更广泛。 2019-05-18 09:39:10 RGMII接口案例:二个设备共享一个PHY 最近项目中,FPGA通过多个RGMII接口与其他设备通...
运行了OOC模块之后,再运行顶层模块综合时可直接调用OOC综合结果,而不需要重新运行一次综合(除非修改了RTL设计或约束)。 针对用户逻辑 选择需要添加到OOC运行的模块,右键->Set As Out-Of-Context for Synthesis,弹出如下窗口: 其中Clock Constraint File必须创建一个新的XDC文件或在下拉菜单中选择一个已经存在的XDC文件...
As a result, the "Make Diff Pair" option has been hidden in RTL projects for Vivado 2012.4 and later versions. If the design needs to be modified outside of the HDL/Pin Planning project, the following TCL command can be used to create the differential port: make_diff_pair_ports port_...
[Vivado 12-5470] The design checkpoint file '.dcp' was generated for an IP by an out of context synthesis run and should not directly be used as a source in a Vivado flow. It is strongly recommended that that the original IP source file (.xci) be used. [Vivado 12-5469] The design...
For example, say you had performed synthesis, and subsequently you modified one of the RTL files. Even though synthesis is complete, it is stale because an input was modified after synthesis. In a Vivado context, this situation is called “Out of Date.” Sometimes, you might see syn...
Q1: The output files/outcome of “generate output products” are the same regardless of “global and out-of-context” ?Since Vivado synthesis is timing aware then results of synthesis will depend on the period of each clock used in the IP. During Global synthesis, cl...