2D-Array Write into a file

sresam89 · Jul 17, 2014

Hi all,
I am stuck in a code part

Code Verilog - [expand]
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reg [3:0] memory[0:255];
.....
initial begin
$readmemb("out.txt", memory,0,255);//this is reading fine
end
.....
always@(posedge clk) begin
 $display("%d\n",address);
 descriptor = $fopen("in.txt","w");
 $fwrite(descriptor,"%b\n",memory[address]);            //how do i write in here? [3X255]
 $display("%b : %b\n",address,memory[address][0:3]);  //also display the same here
 #210 $fclose(descriptor);
end

please help

SAM

ads-ee · Jul 17, 2014

sresam89 said:

Code Verilog - [expand]
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reg [3:0] memory[0:255];
.....
initial begin
$readmemb("out.txt", memory,0,255);//this is reading fine
end
.....
always@(posedge clk) begin
 $display("%d\n",address);
 descriptor = $fopen("in.txt","w");
 $fwrite(descriptor,"%b\n",memory[address]);            //how do i write in here? [3X255]
 $display("%b : %b\n",address,memory[address][0:3]);  //also display the same here
 #210 $fclose(descriptor);
end

You're opening the file every clock cycle? you should move the $fopen to an initial block.

This line is using the wrong bit ordering:

Code:

 $display("%b : %b\n",address,memory[address][0:3]);  //also display the same here

you should be using:

Code:

 $display("%b : %b\n",address,memory[address][3:0]);  //also display the same here

You could also display and write to a file if you use multichannel file descriptors, which you would or together. see: http://www.testbench.in/TB_26_FILE_HANDLING.html

Regards

LotusElectronics · Jul 22, 2014

You can use like this...

#include <iostream>
#include <fstream>
using namespace std;

int main() {
char arr[][3] = {{'1','2','3'},{'4','5','6'},{'7','8','9'}};
char arr2[3][3];
ofstream out("io3.txt");
out.write(arr[0],9);
out.close();
ifstream in("io3.txt");
in.read(arr2[0],9);
for(int i = 0; i < 3; ++i)
for(int j = 0; j < 3; ++j)
cout << arr2[j];
cout << endl;
}

TrickyDicky · Jul 22, 2014

LotusElectronics said:
You can use like this...

You might struggle to get your C code through a verilog compiler.

2D-Array Write into a file

sresam89

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2D-Array Write into a file

sresam89

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