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Altera_Forum
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16 years ago

How to wire to signal tap?

(* keep = 1 *) wire rx_bar_hit/* synthesis keep */; assign rx_bar_hit = (rx_desc | rx_desc) ? 1'b1 : 1'b0; But I can't add this signal to Siganl Tap. If I add this signal manualy (just type t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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Yes,

"Design Entry (all names)" don't show this signal. Even if I make (* noprune *) (* keep = 1 *) wire rx_bar_hit;

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Hi,

did you get a warning like this : "object "rx_bar_hit" assigned a value but never read" ?

That means the signal "rx_bar_hit" is not used in your design and it looks like that it

is removed regardless of your "keep" assignment. I assume "keep" will only work in order

to prevent the signal to be removed by the synthesis engine.

BTW: "noprune" works only for reg ! in case they have no fan out.

Kind regards

GPK