comparison failures

[drnealaggarwal]

If the .cmp file spacings in the results expected are not EXACTLY what the chip outputs I get a comparison error. Putting in extra spacing (three spaces around each result) solved this issue. Thought to post this as someone else out there might be getting just as frustrated as I was trying to get the test script on the Xor chip to run through to 'Comparison ended successfully' without stopping at each script command terminator (;) with a 'comparison failure message.'

[cadet1620]

Please tell us exactly which file is wrong.  There are Xor.tst and .cmp files in the project\00 and project\01 directories and they all appear to be correct as of 9 Oct 2012.

--Mark

[drnealaggarwal]

Mark

I think I've managed to hunt this down. The confusion for me lay in the code given in Figure 1.6 in the book where the test script output-list command is

output-list a, b, out;

while the file in projects/01/Xor.tst has that output line as

output-list a%B3.1.3 b%B3.1.3 out%B3.1.3;

I think the formatting specification caused the problems I experienced. I created my own Xor.hdl and Xor.tst but must have copied the .out file from projects/01. The simulator would halt at every 'output;' line with a reported error '... comparison failure.'

Perhaps resolution notes for this belong (if not already there) in the errata for the book or maybe a note to say the examples in the book are not meant to be keyed in and serve for discussion only?

Hope this makes sense and helps.

Neal