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fix testbench formatting

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This commit is contained in:
Arthur Lu 2022-08-18 02:08:55 +00:00
parent 570bd3698a
commit 36e5abab60
2 changed files with 141 additions and 148 deletions
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4
RTL/program1_tb.sv
View File

@ -72,7 +72,6 @@ module program1_tb ();
initial begin initial begin
file_no = 'b1; file_no = 'b1;
//file_no = $fopen("msg_enocder_out.txt","w");
#0ns strlen = str1.len; // length of string 1 (# characters between " ") #0ns strlen = str1.len; // length of string 1 (# characters between " ")
if(strlen>54) strlen = 54; // clip message at 54 characters if(strlen>54) strlen = 54; // clip message at 54 characters
// program 1 -- precompute encrypted message // program 1 -- precompute encrypted message
@ -132,9 +131,10 @@ module program1_tb ();
$fdisplay(file_no,"%d bench msg: %s %h dut msg: %h", n, msg_crypto1[n][6:0]+8'h20, msg_crypto1[n], dut.DM.core[n+64]); $fdisplay(file_no,"%d bench msg: %s %h dut msg: %h", n, msg_crypto1[n][6:0]+8'h20, msg_crypto1[n], dut.DM.core[n+64]);
score++; score++;
end end
else else begin
$fdisplay(file_no,"%d bench msg: %s %h dut msg: %h OOPS!", n, msg_crypto1[n][6:0]+8'h20, msg_crypto1[n], dut.DM.core[n+64]); $fdisplay(file_no,"%d bench msg: %s %h dut msg: %h OOPS!", n, msg_crypto1[n][6:0]+8'h20, msg_crypto1[n], dut.DM.core[n+64]);
end end
end
$fdisplay(file_no,"score = %d/64",score); $fdisplay(file_no,"score = %d/64",score);
#20ns $fclose(file_no); #20ns $fclose(file_no);

49
RTL/program2_tb.sv
View File

@ -4,31 +4,27 @@
// runs program 2 (decrypt a message) // runs program 2 (decrypt a message)
module program2_tb () ; module program2_tb () ;
// DUT interface -- four one-bit wires, three to DUT, one from // DUT interface -- four one-bit wires, three to DUT, one from
bit clk , // advances simulation step-by-step bit clk; // advances simulation step-by-step
init = 1'b1 , // init (reset) command to DUT bit init = 1'b1; // init (reset) command to DUT
start = 1'b1 ; // req (start program) command to DUT bit start = 1'b1; // req (start program) command to DUT
wire done; // done flag returned by DUT wire done; // done flag returned by DUT
// test bench parameters // test bench parameters
bit [3:0] pre_length; // space char. bytes before first char. in message bit [3:0] pre_length; // space char. bytes before first char. in message
bit [7:0] message1[54] , // original raw message, in binary bit [7:0] message1[54]; // original raw message, in binary
msg_padded1[64], // original message, plus pre- and post-padding w/ ASCII spaces bit [7:0] msg_padded1[64]; // original message, plus pre- and post-padding w/ ASCII spaces
msg_crypto1[64]; // encrypted message according to the DUT bit [7:0] msg_crypto1[64]; // encrypted message according to the DUT
bit [6:0] lfsr_ptrn , // chosen one of 9 maximal length 7-tap shift reg. ptrns bit [6:0] lfsr_ptrn; // chosen one of 9 maximal length 7-tap shift reg. ptrns
LFSR_ptrn[9] , // the 9 candidate maximal-length 7-bit LFSR tap ptrns bit [6:0] LFSR_ptrn[9]; // the 9 candidate maximal-length 7-bit LFSR tap ptrns
lfsr1[64] , // states of program 1 encrypting LFSR bit [6:0] lfsr1[64]; // states of program 1 encrypting LFSR
LFSR_init ; // one of 127 possible NONZERO starting states bit [6:0] LFSR_init; // one of 127 possible NONZERO starting states
int score; // count of correct encyrpted characters int score; // count of correct encyrpted characters
// our original American Standard Code for Information Interchange message follows // our original American Standard Code for Information Interchange message follows
// note in practice your design should be able to handle ANY ASCII string that is // note in practice your design should be able to handle ANY ASCII string that is
// restricted to characters between space (0x20) and script f (0x9f) and shorter than // restricted to characters between space (0x20) and script f (0x9f) and shorter than
// 55 characters in length // 55 characters in length
string str1 = "Knowledge comes, but wisdom lingers"; // sample program 1 input string str1 = "Knowledge comes, but wisdom lingers"; // sample program 1 input
// string str1 = " . "; // alternative inputs
// string str1 = " 01234546789abcdefghijklmnopqrstuvwxyz. "; // (make up your own,
// string str1 = " f A joke is a very serious thing."; // as well)
// string str1 = " Ajok "; //
// string str1 = "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@";
// string str1 = " Knowledge comes, but wisdom lingers. "; //
// displayed encrypted string will go here: // displayed encrypted string will go here:
string str_enc1[64]; // program 1 desired output will go here string str_enc1[64]; // program 1 desired output will go here
@ -45,12 +41,13 @@ module program2_tb () ;
assign LFSR_ptrn[6] = 7'h5C; assign LFSR_ptrn[6] = 7'h5C;
assign LFSR_ptrn[7] = 7'h7E; assign LFSR_ptrn[7] = 7'h7E;
assign LFSR_ptrn[8] = 7'h7B; assign LFSR_ptrn[8] = 7'h7B;
always_comb begin always_comb begin
pt_no = 4; pt_no = $urandom_range(0, 8);
//pt_no = $urandom_range(0, 8);
if(pt_no>8) pt_no[3] = 0; // restrict pt_no to 0 through 8 if(pt_no>8) pt_no[3] = 0; // restrict pt_no to 0 through 8
lfsr_ptrn = LFSR_ptrn[pt_no]; // look up and engage the selected pattern; to data_mem[62] lfsr_ptrn = LFSR_ptrn[pt_no]; // look up and engage the selected pattern; to data_mem[62]
end end
// now select a starting LFSR state -- any nonzero value will do // now select a starting LFSR state -- any nonzero value will do
always_comb begin always_comb begin
LFSR_init = $urandom;//$random>>2; // or set a value, such as 7'b1, for debug LFSR_init = $urandom;//$random>>2; // or set a value, such as 7'b1, for debug
@ -73,14 +70,7 @@ module program2_tb () ;
); );
initial begin initial begin
//***** pre-load your instruction ROM here or inside itself *****
// $readmemb("encoder.bin", dut.instr_rom.rom);
// you may also pre-load desired constants, etc. into
// your data_mem here -- the upper addresses are reserved for your use
// dut.data_mem.DM[128]=8'hfe; //whatever constants you want
// to display to console, change this line to file_no = 'b1;
file_no = 'b1; file_no = 'b1;
// file_no = $fopen("msg_decoder_out.txt"); // create your output file
#0ns strlen = str1.len; // length of string 1 (# characters between " ") #0ns strlen = str1.len; // length of string 1 (# characters between " ")
if(strlen>52) strlen = 52; // clip message at 52 characters if(strlen>52) strlen = 52; // clip message at 52 characters
// program 1 -- precompute encrypted message // program 1 -- precompute encrypted message
@ -104,8 +94,7 @@ module program2_tb () ;
for (int i=0; i<64; i++) begin for (int i=0; i<64; i++) begin
msg_crypto1[i] = (msg_padded1[i] ^ lfsr1[i]); msg_crypto1[i] = (msg_padded1[i] ^ lfsr1[i]);
msg_crypto1[i][7] = ^msg_crypto1[i][6:0]; // prepend parity bit into MSB msg_crypto1[i][7] = ^msg_crypto1[i][6:0]; // prepend parity bit into MSB
$fdisplay(file_no,"i=%d, msg_pad=0x%h, lfsr=%b msg_crypt w/ parity = 0x%h", $fdisplay(file_no,"i=%d, msg_pad=0x%h, lfsr=%b msg_crypt w/ parity = 0x%h", i,msg_padded1[i],lfsr1[i],msg_crypto1[i]);
i,msg_padded1[i],lfsr1[i],msg_crypto1[i]);
// for display purposes only, add 8'h20 to avoid nonprintable characters (<8'h20) // for display purposes only, add 8'h20 to avoid nonprintable characters (<8'h20)
str_enc1[i] = string'(msg_crypto1[i][6:0]+8'h20); str_enc1[i] = string'(msg_crypto1[i][6:0]+8'h20);
end end
@ -130,8 +119,10 @@ module program2_tb () ;
#10ns start = 1'b0; // request/start = 1 holds your program counter #10ns start = 1'b0; // request/start = 1 holds your program counter
#60ns; // wait for 6 clock cycles of nominal 10ns each #60ns; // wait for 6 clock cycles of nominal 10ns each
wait(done); // wait for DUT's ack/done flag to go high wait(done); // wait for DUT's ack/done flag to go high
#10ns $fdisplay(file_no,""); #10ns $fdisplay(file_no,"");
$fdisplay(file_no,"program 2:"); $fdisplay(file_no,"program 2:");
// ***** reads your results and compares to test bench // ***** reads your results and compares to test bench
// ***** use your instance name for data memory and its internal core ***** // ***** use your instance name for data memory and its internal core *****
for(int n=0; n<64; n++) begin for(int n=0; n<64; n++) begin
@ -140,10 +131,12 @@ module program2_tb () ;
n, msg_padded1[n], msg_padded1[n], dut.DM.core[n]); n, msg_padded1[n], msg_padded1[n], dut.DM.core[n]);
score++; score++;
end end
else else begin
$fdisplay(file_no,"%d bench msg: %s %h dut msg: %h OOPS!", $fdisplay(file_no,"%d bench msg: %s %h dut msg: %h OOPS!",
n, msg_padded1[n], msg_padded1[n], dut.DM.core[n]); n, msg_padded1[n], msg_padded1[n], dut.DM.core[n]);
end end
end
$fdisplay(file_no,"score = %d/64",score); $fdisplay(file_no,"score = %d/64",score);
#20ns $fclose(file_no); #20ns $fclose(file_no);
#20ns $stop; #20ns $stop;