How to wire to signal tap?

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(* 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 this name in signal tap):

Critical Warning: Can't connect pre-synthesis signal "top_example_chaining_pipen1b:core|altpcierd_example_app_chaining:app|altpcierd_cdma_app_icm:chaining_dma_arb|artem_dma:artem_dma0|rx_bar_hit" to port "trigger_in" on SignalTap II instance "auto_signaltap_0" because the signal does not exist in the pre-synthesis netlis

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Hi,

which setting did you use in the node finder ? Post-Fitting ?? Which Quartus version do you use ?

Kind regards

GPK

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Hi,

which setting did you use in the node finder ? Post-Fitting ?? Which Quartus version do you use ?

Kind regards

GPK

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Hello. I'm try all settings. No one can find rx_bar_hit. Q9.1 Linux 64bit.

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Hello. I'm try all settings. No one can find rx_bar_hit. Q9.1 Linux 64bit.

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Hi,

strange, at least "All Names" should show the signal. Did you try wildcards like rx_bar* ?

Kind regards

GPK

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Hi,

strange, at least "All Names" should show the signal. Did you try wildcards like rx_bar* ?

GPK

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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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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

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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

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Yes. I'm not use this wire yet. But I'm expected that wire will be used by Signal Tap.

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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.

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So, there are no way to make wire only for Signal Tap?

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Yes. I'm not use this wire yet. But I'm expected that wire will be used by Signal Tap.

So, there are no way to make wire only for Signal Tap?

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Hi,

it looks like that, but you can try to capture the wire signal with a register and preserve the register with "noprune".

Kind regards

GPK

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Hi,

it looks like that, but you can try to capture the wire signal with a register and preserve the register with "noprune".

Kind regards

GPK

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Hi,

I looked into the Quartus Help and found this restriction for "keep":

"You cannot use this synthesis attribute for nodes that have no fan-out."

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Hi,

it looks like that, but you can try to capture the wire signal with a register and preserve the register with "noprune".

Kind regards

GPK

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(* keep = 1 *) wire rx_bar_hit;

(* noprune *)reg rx_bar_hit_reg;

always @ (posedge clk_in) begin

rx_bar_hit_reg <= rx_bar_hit;

end

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Worked.

Thanks for all.

you can also route those signals to outside pins, to leds for instance.

a colegue of mine suggested me to XOR all signals that i want to debug and route result to LEDs.