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Visitor
Visitor
319 次查看
注册日期: ‎12-13-2019

ILA观测CLK

请问想在上板子后透过ILA观测CLK,应该要怎么接才会出现,我像图上这样接观测不到CLK,只有出现probe0~4的讯号,请各位帮帮忙,感谢。

 

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Teacher
Teacher
297 次查看
注册日期: ‎07-09-2009

回复: ILA观测CLK

The ILA is a clocked device, it samples the data into it on the clock you give it,

So if you try to look at the clock with the ILA clocked at the same clock, then the signal will always be the same level,

A typical get around, is to create a divide by two flip flop, and feed the output of the divider into the ILA

But note, if the clock is at fault, and not there, the ILA will also not work
<== If this was helpful, please feel free to give Kudos, and close if it answers your question ==>
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Xilinx Employee
Xilinx Employee
269 次查看
注册日期: ‎06-02-2017

回复: ILA观测CLK

@@chihhua 你好,

首先你需要了解ila的工作原理,如drjohnsmith所说,其实就是用一个时钟去采样你需要观察的信号。于是如果你希望观察时钟信号,那么就要将时钟看成普通的待测信号,所以根据你自己的需求设置采样时钟。我们一般来说不会使用ila去看时钟信号,但一定要这样做当然也是可以的,比如你产生一个高频率时钟去观察低频时钟。

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