| Line 1... |
Line 1... |
|
///*************************************************************///
|
|
/// ///
|
|
/// Reed-Solomon Decoder (31,19,6) ///
|
|
/// ///
|
|
/// ///
|
|
/// Author : Rudy Dwi Putra ///
|
|
/// rudy.dp@gmail.com ///
|
|
/// ///
|
|
///*************************************************************///
|
|
/// ///
|
|
/// Copyright (C) 2006 Rudy Dwi Putra ///
|
|
/// rudy.dp@gmail.com ///
|
|
/// ///
|
|
/// This source file may be used and distributed without ///
|
|
/// restriction provided that this copyright statement is not ///
|
|
/// removed from the file and that any derivative work contains ///
|
|
/// the original copyright notice and the associated disclaimer.///
|
|
/// ///
|
|
/// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY ///
|
|
/// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED ///
|
|
/// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ///
|
|
/// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR ///
|
|
/// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ///
|
|
/// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ///
|
|
/// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ///
|
|
/// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR ///
|
|
/// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ///
|
|
/// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ///
|
|
/// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ///
|
|
/// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ///
|
|
/// POSSIBILITY OF SUCH DAMAGE. ///
|
|
/// ///
|
|
///*************************************************************///
|
|
|
No newline at end of file
|
No newline at end of file
|
|
//***************************************//
|
|
// Testbench for RS Decoder (31, 19, 6) //
|
|
//***************************************//
|
|
|
|
module testbench_rsdecoder;
|
|
|
|
reg [4:0] recword;
|
|
reg clock1, clock2;
|
|
reg start, reset;
|
|
|
|
//******************************************************//
|
|
// ready = if set to 1, decoder is ready to input or it //
|
|
// is inputting new data //
|
|
// dataoutstart = flag the first symbol of outputted //
|
|
// received word. //
|
|
// dataoutend = flag the last symbol of outputted //
|
|
// received word. //
|
|
// errfound = set to 1, if one of syndrome values //
|
|
// is not zero. //
|
|
// decode_fail = set to 1, if decoder fails to correct //
|
|
// the received word. //
|
|
//******************************************************//
|
|
wire ready, decode_fail, errfound, dataoutstart, dataoutend;
|
|
wire [4:0] corr_recword;
|
|
|
|
parameter [5:0] clk_period = 50;
|
|
|
|
initial
|
|
begin
|
|
recword = 5'b0;
|
|
start = 0;
|
|
reset = 0;
|
|
end
|
|
|
|
//**********//
|
|
// clock1 //
|
|
//**********//
|
|
initial
|
|
begin
|
|
clock1 = 0;
|
|
forever #(clk_period/2) clock1 = ~clock1;
|
|
end
|
|
|
|
//**********//
|
|
// clock2 //
|
|
//**********//
|
|
initial
|
|
begin
|
|
clock2 = 1;
|
|
forever #(clk_period/2) clock2 = ~clock2;
|
|
end
|
|
|
|
//***********************************************//
|
|
// This section defines feeding of received word //
|
|
// and start signal. Start signal is active 1 //
|
|
// clock cycle before first symbol of received //
|
|
// word. All input and output synchronize with //
|
|
// clock2. First received word contains no error //
|
|
// symbol. Thus, all syndrome values will be zero//
|
|
// and decoder will pass the received word. //
|
|
// Second received word contains 6 error symbol. //
|
|
// Decoder will determine its error locator //
|
|
// and error evaluator polynomial in KES block. //
|
|
// Then, it calculates error values in CSEE //
|
|
// block. Third received word contains 8 error //
|
|
// symbol. Decoder can't correct the error and //
|
|
// at the end of outputted received word, it will//
|
|
// set decode_fail to 1. //
|
|
//***********************************************//
|
|
initial
|
|
begin
|
|
#(clk_period) reset = 1;
|
|
|
|
//start has to be active 1 clock cycle before first recword,
|
|
//otherwise decoder will output wrong recword.
|
|
#(clk_period) start = 1;
|
|
#(clk_period) start = 0;
|
|
|
|
//First received word contains no error symbol.
|
|
//The decoder should give errfound = 0 at the end
|
|
//of syndrome calculation stage.
|
|
recword = 5'b10100;
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b00101;
|
|
#(clk_period) recword = 5'b10001;
|
|
#(clk_period) recword = 5'b10110;
|
|
#(clk_period) recword = 5'b00001;
|
|
#(clk_period) recword = 5'b00010;
|
|
#(clk_period) recword = 5'b11100;
|
|
#(clk_period) recword = 5'b00011;
|
|
#(clk_period) recword = 5'b10001;
|
|
#(clk_period) recword = 5'b00110;
|
|
#(clk_period) recword = 5'b00111;
|
|
#(clk_period) recword = 5'b01010;
|
|
#(clk_period) recword = 5'b11111;
|
|
#(clk_period) recword = 5'b01011;
|
|
#(clk_period) recword = 5'b10100;
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b00101;
|
|
#(clk_period) recword = 5'b00001;
|
|
#(clk_period) recword = 5'b10111;
|
|
#(clk_period) recword = 5'b10100;
|
|
#(clk_period) recword = 5'b00010;
|
|
#(clk_period) recword = 5'b10110;
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b01011;
|
|
#(clk_period) recword = 5'b00110;
|
|
#(clk_period) recword = 5'b11110;
|
|
#(clk_period) recword = 5'b10100;
|
|
#(clk_period) recword = 5'b11111;
|
|
#(clk_period) recword = 5'b01010;
|
|
#(clk_period) recword = 5'b11110;
|
|
#(clk_period) recword = 5'b0;
|
|
|
|
|
|
#(18*clk_period) start = 1;
|
|
#(clk_period) start = 0;
|
|
|
|
//Second received word contains 6 error symbols.
|
|
//The decoder sets errfound = 1, and activates
|
|
//KES block and then CSEE block. Because the
|
|
//number of errors is equal to correction capability
|
|
//of the decoder, decoder can correct the received
|
|
//word.
|
|
recword = 5'b01100; //it should be 5'b10100
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b00101;
|
|
#(clk_period) recword = 5'b10001;
|
|
#(clk_period) recword = 5'b10110;
|
|
#(clk_period) recword = 5'b00001;
|
|
#(clk_period) recword = 5'b00110; //it should be 5'b00010
|
|
#(clk_period) recword = 5'b11100;
|
|
#(clk_period) recword = 5'b00011;
|
|
#(clk_period) recword = 5'b10001;
|
|
#(clk_period) recword = 5'b00110;
|
|
#(clk_period) recword = 5'b00101; //it should be 5'b00111
|
|
#(clk_period) recword = 5'b01010;
|
|
#(clk_period) recword = 5'b11111;
|
|
#(clk_period) recword = 5'b11111; //it should be 5'b01011
|
|
#(clk_period) recword = 5'b10100;
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b00101;
|
|
#(clk_period) recword = 5'b00001;
|
|
#(clk_period) recword = 5'b10111;
|
|
#(clk_period) recword = 5'b01101; //it should be 5'b10100
|
|
#(clk_period) recword = 5'b00010;
|
|
#(clk_period) recword = 5'b10110;
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b01011;
|
|
#(clk_period) recword = 5'b00110;
|
|
#(clk_period) recword = 5'b11110;
|
|
#(clk_period) recword = 5'b10100;
|
|
#(clk_period) recword = 5'b10101; //it should be 5'b11111
|
|
#(clk_period) recword = 5'b01010;
|
|
#(clk_period) recword = 5'b11110;
|
|
#(clk_period) recword = 5'b0;
|
|
|
|
#(20*clk_period) start = 1;
|
|
#(clk_period) start = 0;
|
|
//Third received word contains 8 error symbols.
|
|
//Because the number of errors is greater than correction
|
|
//capability, decoder will resume decoding failure at the end of
|
|
//outputted received word.
|
|
recword = 5'b10100;
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b00101;
|
|
#(clk_period) recword = 5'b10001;
|
|
#(clk_period) recword = 5'b10110;
|
|
#(clk_period) recword = 5'b00100; //it should be 5'b00001
|
|
#(clk_period) recword = 5'b00010;
|
|
#(clk_period) recword = 5'b11100;
|
|
#(clk_period) recword = 5'b10010; //it should be 5'b00011
|
|
#(clk_period) recword = 5'b10101; //it should be 5'b10001
|
|
#(clk_period) recword = 5'b00110;
|
|
#(clk_period) recword = 5'b10011; //it should be 5'b00111
|
|
#(clk_period) recword = 5'b01010;
|
|
#(clk_period) recword = 5'b11111;
|
|
#(clk_period) recword = 5'b01011;
|
|
#(clk_period) recword = 5'b10100;
|
|
#(clk_period) recword = 5'b00110; //it should be 5'b00100
|
|
#(clk_period) recword = 5'b00101;
|
|
#(clk_period) recword = 5'b00100; //it should be 5'b00001
|
|
#(clk_period) recword = 5'b10110; //it should be 5'b10111
|
|
#(clk_period) recword = 5'b10100;
|
|
#(clk_period) recword = 5'b00010;
|
|
#(clk_period) recword = 5'b10110;
|
|
#(clk_period) recword = 5'b00100;
|
|
#(clk_period) recword = 5'b01011;
|
|
#(clk_period) recword = 5'b00110;
|
|
#(clk_period) recword = 5'b11110;
|
|
#(clk_period) recword = 5'b10010; //it should be 5'b10100
|
|
#(clk_period) recword = 5'b11111;
|
|
#(clk_period) recword = 5'b01010;
|
|
#(clk_period) recword = 5'b11110;
|
|
#(clk_period) recword = 5'b0;
|
|
end
|
|
|
|
|
|
RSDecoder rsdecoder(recword, start, clock1, clock2, reset, ready,
|
|
errfound, decode_fail, dataoutstart, dataoutend,
|
|
corr_recword);
|
|
|
|
endmodule
|
No newline at end of file
|
No newline at end of file
|
