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maxer
Joined: 18 May 2001
Posts: 124
Helped: 3
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 18 Jan 2005 10:45 anyone could give an advice on this?? |
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i'm doing a project on xilinx xc3s200 spartan3 board.
my simulation on modelsim give the expected results but on the modelsim
window this message repeats over and over and over annoying me and slowing down the simulation
# Time: 447490 ns Iteration: 3 Instance: /gestionetastiera_testoftastiera_vhd_tb/uut/delayresetkeyb
# ** Warning: There is an 'U'|'X'|'W'|'Z'|'-' in an arithmetic operand, the result will be 'X'(es).
anyone have any idea why this happens??
what should i do??
thank you in advance
regards
maXer
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zape
Joined: 10 Jul 2003
Posts: 104
Helped: 9
Location: Spain
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18 Jan 2005 11:52 anyone could give an advice on this?? |
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| The warning comes form an arithmetic operation where one of the operands is not initialized, so the simulator can not solve it.
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18 Jan 2005 11:52 Ads |
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nand_gates
Joined: 19 Jul 2004
Posts: 907
Helped: 120
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18 Jan 2005 15:05 Re: anyone could give an advice on this?? |
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If you dont care about them then add following lines to ur
modelsim.ini file
; Turn off warnings from the std_logic_arith, std_logic_unsigned
; and std_logic_signed packages.
StdArithNoWarnings = 1
; Turn off warnings from the IEEE numeric_std and numeric_bit packages.
NumericStdNoWarnings = 1
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masai_mara
Joined: 13 Aug 2004
Posts: 118
Helped: 6
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20 Jan 2005 7:32 Re: anyone could give an advice on this?? |
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They are as said before due to uninitialized signals and variables.
you can simply disable the display by going to simulate options and turning off the display settings for warnings.
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