Subversion Repositories reed_solomon_decoder

 
//`timescale 1 ns / 1 ps
module RS_dec_tb;
 
parameter pclk = 5;     /// period of clk/2 
 
parameter number = 100;  ///  number of input codewords
 
 
reg clk,reset;
reg CE;
reg [7:0] input_byte;
 
wire [7:0] Out_byte;
wire CEO;
wire Valid_out;
 
RS_dec  DUT 
(
  .clk(clk), // input clock 
  .reset(reset), // active high asynchronous reset
  .CE(CE), // chip enable active high flag for one clock with every input byte
  .input_byte(input_byte), // input byte
 
  .Out_byte(Out_byte),   // output byte
  .CEO(CEO),  // chip enable for the next block will be active high for one clock , every 8 clks
  .Valid_out(Valid_out) /// valid out for every output block (188 byte)
);
 
 
 
reg [7:0] in_mem [0:(number*204)-1];
reg [7:0] out_mem [0:(number*188)-1];
 
reg enable;
reg [7:0]true_out;
integer h,k,err;
 
 
initial
begin
	clk=0;
	forever #pclk clk=~clk;
end 
 
 
 
integer ce_t,in_t;
integer lim; // minimum  6
 
initial 
begin
	err=0;
	lim=6;
	$readmemb("input_RS_blocks",in_mem);
	$readmemb("output_RS_blocks",out_mem);
end
 
 
initial
begin
	CE=0;
	@(posedge enable);
	forever
	begin
		@(posedge clk);
		#2 CE=1;
		@(posedge clk);
		#2 CE=0;
		for(ce_t=0; ce_t<lim; ce_t=ce_t+1)
			@(posedge clk); 
	end 
end
 
initial 
 
begin
	h=0;
	k=0;
	enable = 0;
	reset =1;
	@(posedge clk); @(posedge clk); @(posedge clk);
	@(posedge clk); @(posedge clk); @(posedge clk);
	reset=0;
	@(posedge clk); @(posedge clk);
	enable=1;
end
 
 
///////////////////// inputs///////////////
 
initial 
begin
 
	input_byte=0;
 
	@(posedge enable);
 
	for(k=0;k<(number*204);k=k+1)
	begin
 
		input_byte=in_mem[k];
 
		@(posedge clk);@(posedge clk);
		for(in_t=0; in_t < lim; in_t=in_t+1)
			@(posedge clk); 
	end 
 
end
 
//////////////////////////////outputs////////////////////////
always @ (posedge(clk))
begin
	if(Valid_out && CEO)
		begin
			true_out = out_mem[h];
 
			if(true_out !== Out_byte)
				begin
					$display("Error at out no. %d !!!!!!!!!!!!!",h);
					err=err+1;
				end
			h=h+1;
 
			if(h== (number*188) )
				begin
					if (err == 0)
						$display("No Errors !!!!!!!!!!!!!");
					else
						$display("Total Errors =  %d !!!!!!!!!!!!!",err);
 
					$stop;
 
				end
 
		end
end
 
endmodule