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Quartus No Clocks Defined In Design. Figure 1 shows a scenario where it helps to define a virtual clock. The no_clock check reports whether registers have at least one clock at their clock pin, and that ports determined to be clocks have a clock assigned to them, and also checks that plls have a clock assignment.
Altera Quartus II Tutorial v11.1 YouTube from www.youtube.com
Now, within the block, the path to port can be timed by specifying output delay for. It also presents a great example of constraining a synchronous i/o circuit. 总是警告 no clocks defiend in design大侠：请问如何锁定呢？ 我在pin planner里定义好引脚后，再在assignment name里将那个信号的aaaignment name属性设置成 global signal，值设置成global clock，但是这样编译后 pin planner里 原来定义的端口就没了，而且警告提示:no exact pin location assignment for 1pins of 3 total pins 展开
Altera Quartus II Tutorial v11.1 YouTube
University of hartfordbynick vanmater and matt woodardsaeid moslehpour No recovery paths to report info (332140): 1 the quartus ii software assigns a default frequency of 1 ghz for clocks that have not been constrained, either in the timequest gui or an.sdc file, unless any constraint exists in the design. Your design has a signal called clk, but it isn't used as clock.
