Skip navigation.
Home
hdlsnippets
Verilog Snippets | VHDL Snippets | SystemVerilog Snippets | About | Links
Home

Verilog readmemh

Submitted by abettino on Wed, 04/14/2010 - 12:43

The $readmemh system task in Verilog allows a program to read data from a text file with hexadecimal formatted data. For example, if a file test_data.dat contains the data.

00000001
ffffffff
abcd1234
55558888
00000001
ffffffff
abcd1234
55558888

Then this snippet can read in this data and display it.

module verilog_readmemh;
reg [31:0]  data_ram [0:7];   // array to store the data in.
integer     ii;               // loop variable.
initial begin
  $readmemh("test_data.dat",data_ram);  // read hex data from file into data_ram
  for (ii=0;ii<8;ii=ii+1) $display("%x",data_ram[ii]); // display it.
  $stop;
end
endmodule

»