[SOLVED] reading a file in verilogA

[ashrafsazid]

Hi,

I need some helps regarding reading a file (say .txt, could be .csv as well) from a directory path and then generate a voltage signal based on the array of values from the file.

There is a timing event, and the elements of the file array will be accessed based on timing events.

Here is the VerilogA code:

`include "constants.vams"
`include "disciplines.vams"

module module_filereader (val);


output val;
electrical val;


parameter real period = 1/10k ;
parameter integer maxcount = 128 ;

integer  dataread, cnt;
real mydata1, mydata2;
real datacol1 [maxcount-1:0];

analog begin

@(initial_step) begin
	cnt = 0;
	dataread = $fopen("/home/datafiles/data.txt","r"); //opening file readable access
	end



@(timer(0, period )) begin
    cnt = cnt+1;
	end


while( cnt < maxcount ) begin	
 	mydata1 = $fscanf(dataread,"%e", datacol1[cnt]);

      end

$display ("| Transient:%g | data1: %g |", $realtime, mydata1) ;

@(final_step) $fclose(dataread);



// V(val) <+ transition(mydata1, 1n, 1n, 1n);

end


endmodule

The input file is like this with many values depending on the count:

1
4
12
3
6
2
6
7
4
10
7
9
9
..... and so on

The problem is I am getting some simulation error regarding the content of the file and it says

Fatal error found by spectre during IC analysis, during transient analysis `tran'.
    FATAL (ASL-3211): "/home/cadence_libs/mylib/module_filereader/veriloga/veriloga.va" 35: I225:  Digit not found in input file/string to match $fread/$fscanf/$sscanf format string. Change the format string to match the input file/string or correct the input file/string.

Analysis `tran' was terminated prematurely due to an error.

Please help me to solve this.

 

[dick_freebird]

Have you inspected the format string, relative to the
data? First line? All lines? Number of lines / error trap
for EOF?

 

[ashrafsazid]

Have you inspected the format string, relative to the
data? First line? All lines? Number of lines / error trap
for EOF?

Found the issue, it is related to the filesystem difference between Unix and Windows text format. The difference of "Line end Character" which has to be a newline (\n) creates the issue.