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Voyager
Voyager
335 Views
Registered: ‎07-28-2008

Hardware Manager export ILA data vcd is limited to 2.2KB (2018.2)?

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All signals are in there but only contains 200 something clocks data.

While to .csv works fine. Is this a bug or I'm doing something wrong.

Thanks,

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1 Solution

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Moderator
Moderator
194 Views
Registered: ‎02-09-2017

Re: Hardware Manager export ILA data vcd is limited to 2.2KB (2018.2)?

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Hi @legendbb,

 

Have you tried loading this VCD to a compatible tool and see if the waveform is correctly reproduced?

I exported the data from a test design I have and I got the same result. the CSV file has 1026 lines (2 lines fo header and 1024 data lines), while the VCD file only has 144 lines (including headers).

But after analyzing it better, I see that the first 979 samples are exactly the same, so the VCD file was smart enough to truncate it down in the following way:

$dumpvars
1"
b110101 #
b1 *
1,
0-
0.
1/
00
$end
#979

After that, there is a data line for each sample, since the data changes:

#980
b110110 #
b11 *
#981
b110111 #
#982
b111000 # 
...

I tested that file and it reconstructs the waveform correctly. So I believe your file is the same.

Could you please test it in a VCD reader? If it actually reconstructs the wrong waveform, please report back so we can investigate it.

Thanks,

 

 

Andre Guerrero

Product Applications Engineer

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2 Replies
Moderator
Moderator
195 Views
Registered: ‎02-09-2017

Re: Hardware Manager export ILA data vcd is limited to 2.2KB (2018.2)?

Jump to solution

Hi @legendbb,

 

Have you tried loading this VCD to a compatible tool and see if the waveform is correctly reproduced?

I exported the data from a test design I have and I got the same result. the CSV file has 1026 lines (2 lines fo header and 1024 data lines), while the VCD file only has 144 lines (including headers).

But after analyzing it better, I see that the first 979 samples are exactly the same, so the VCD file was smart enough to truncate it down in the following way:

$dumpvars
1"
b110101 #
b1 *
1,
0-
0.
1/
00
$end
#979

After that, there is a data line for each sample, since the data changes:

#980
b110110 #
b11 *
#981
b110111 #
#982
b111000 # 
...

I tested that file and it reconstructs the waveform correctly. So I believe your file is the same.

Could you please test it in a VCD reader? If it actually reconstructs the wrong waveform, please report back so we can investigate it.

Thanks,

 

 

Andre Guerrero

Product Applications Engineer

-------------------------------------------------------------------------
Don’t forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------

View solution in original post

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Voyager
Voyager
172 Views
Registered: ‎07-28-2008

Re: Hardware Manager export ILA data vcd is limited to 2.2KB (2018.2)?

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Great thanks, I'm able to get waveform out of .vcd by using gtkwave.