Modelsim Failed to Open Design Unit File in Read Mode.

Dylan01

failed to open readmem file

I want to read a data file and accept the data in memory,
while using following
$readmemb("data.dat", memory); (memory is a annals array)
modelsim giving following fault
** Warning: (vsim-7) Failed to open readmem file "information.dat" in read way.
and it is not reading the correct data.
Why this mistake is coming and what is the solution.contents of data.dat are :

@000
00010010
00000011
@002
11111111 01010101
00000000 10101010

@006
1111zzzz 00001111

someone plz propose solution

echo47

failed to open up readmem file in read manner

No problem here. I created data.dat and and so ran this is ModelSim SE 6.1b:

                                module test;   reg [vii:0] memory [0:vii];   integer due north;   initial begin     $readmemb("data.dat", memory);     for (n=0; n<8; north=northward+one)       $brandish("%b", memory[n]);   cease endmodule

Results:
# 00010010
# 00000011
# 11111111
# 01010101
# 00000000
# 10101010
# 1111zzzz
# 00001111

Dylan01

failed to open data file

this is the lawmaking . 1 thing here that code was working fine to me previously just now its not working . i wanted to know is in that location a problem in s/w shud i reinstall it ..

module readfile;

reg [seven:0] memory[0:7];
integer i;

initial
begin
$readmemb("data.dat", memory);

for(i=0; i < 8; i = i + 1)
$display("Memory [%0d] = %b", i, retentiveness);

end

endmodule

echo47

failed to open up readmem file in read mode.

Did the problem begin subsequently y'all updated your ModelSim? Here are comments from various Release Notes:

Verilog Defects Repaired in 5.8e:
* A problem relating to $readmem resulted in retention leaks and big load times.

Verilog Defects Repaired in 6.0b:
* The system tasks $readmemh and $readmemb used to report an error when chosen with a memory that was either an automatic variable or a Arrangement Verilog class property

Full general Defects Repaired in vi.0e:
* $readmem for dynamic arrays did non piece of work.

Dylan01

modelsim readmemb

i dont know what was the problem but after reinstalling it started working fine..
anyway thnks for ur assist

ohenri100

modelsim file read and write

hi every body,
module test;
reg [seven:0] memory [0:seven];
initial begin
$readmemb("data.dat", memory);
end
endmodule

it not piece of work, ...
please help me.
file data.dat :
@000
00010010
00000011
@002
11111111 01010101
00000000 10101010

@006
1111zzzz 00001111

Alert (10036): Verilog HDL or VHDL alert at test.v(2): object "memory" assigned a value only never read
Fault (10054): Verilog HDL File I/O error at examination.v(v): can't open Verilog Blueprint File "data.hex"
Error: Can't elaborate acme-level user hierarchy
Error: Quartus 2 Analysis & Synthesis was unsuccessful. 2 errors, 1 warning
Info: Allocated 134 megabytes of retentiveness during processing
Error: Processing ended: Midweek Apr 16 00:37:46 2008
Error: Elapsed fourth dimension: 00:00:01
Error: Quartus II Full Compilation was unsuccessful. ii errors, 1 alert

bandekar.kunal

Re: modelsim file read and write

module test;
reg [7:0] retentiveness [0:7];
integer n;
initial brainstorm
//Path of the file which needs to be opened and read.
$readmemb("$NC_HOME/information.dat", retentiveness);
for (n=0; n<viii; n=n+one)
$display("%b", memory[n]);
end
endmodule

ali_umair21

This problem is due to the fact that you didn't place the text file in your sim folder. Place the RAM file in the same directory from where you are running the simulation

Ervin Worign

Modelsim Failed to Open Design Unit File in Read Mode.

Welcome to EDAboard.com

Failed to open up file in read fashion.(modelsim)

echo47

Advanced Fellow member level 5

echo47

Advanced Member level five

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