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Merge pull request #57 from AllahWasya/main
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updated tb for async 36K fifo model
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@muhammadhamza15
muhammadhamza15 authored Aug 22, 2024
2 parents 863acb3 + 51c88ff commit 6f78ba5
Showing 1 changed file with 156 additions and 30 deletions.
186 changes: 156 additions & 30 deletions models_internal/verilog/tb/FIFO36K_tb.v
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@

`ifdef ASYNC_FIFO

module FIFO36K_tb();
Expand All @@ -18,7 +19,7 @@ module FIFO36K_tb();
wire UNDERFLOW;// FIFO underflow error flag

parameter DATA_WRITE_WIDTH = 36; // FIFO data width (1-36)
parameter DATA_READ_WIDTH = 9; // FIFO data width (1-36)
parameter DATA_READ_WIDTH = 36; // FIFO data width (1-36)

parameter FIFO_TYPE = "ASYNCHRONOUS"; // Synchronous or Asynchronous data transfer (SYNCHRONOUS/ASYNCHRONOUS)
parameter [11:0] PROG_EMPTY_THRESH = 12'h004; // 12-bit Programmable empty depth
Expand Down Expand Up @@ -57,7 +58,7 @@ reg [8:0] pop_data4;
integer wren_cnt=0;
reg [8:0] local_queue [$];
integer fifo_number;
bit debug=0;
bit debug=1;

//clock//
initial begin
Expand Down Expand Up @@ -233,13 +234,14 @@ integer count1=0;
end

// read
assign count1= (DATA_READ_WIDTH>=DATA_WRITE_WIDTH)? 1: DATA_WRITE_WIDTH/DATA_READ_WIDTH; // For example ? = 4
assign count1= (DATA_READ_WIDTH>=DATA_WRITE_WIDTH)? 1: DATA_WRITE_WIDTH/DATA_READ_WIDTH; // For example ? = 4

repeat(count1) begin
pop();
end
repeat(3) @(posedge WR_CLK);
@(negedge WR_CLK);

if ({EMPTY,ALMOST_EMPTY,PROG_EMPTY,UNDERFLOW,FULL,ALMOST_FULL,PROG_FULL,OVERFLOW} !== 8'b0000_0110) begin
begin $display("ERROR: OVERFLOW IS DE-ASSERTED AND PROG FULL AND ALMOST FULL ASSERTED %0b", {EMPTY,ALMOST_EMPTY,PROG_EMPTY,UNDERFLOW,FULL,ALMOST_FULL,PROG_FULL,OVERFLOW}); error=error+1; end
end
Expand Down Expand Up @@ -318,7 +320,8 @@ task push();
@(negedge WR_CLK);

/* ----------------------------------- push byte date ---------------------------------- */
// if (DATA_READ_WIDTH==9) begin
// R-9
if (DATA_READ_WIDTH==9) begin

if(DATA_WRITE_WIDTH==9) begin // 9

Expand All @@ -327,7 +330,7 @@ task push();
fwft_data1 = WR_DATA;

end
local_queue.push_back(WR_DATA[8:0]);
local_queue.push_back({WR_DATA[8], WR_DATA[7:0]});
end

else if(DATA_WRITE_WIDTH==18) begin // 18
Expand All @@ -351,37 +354,138 @@ task push();
local_queue.push_back({WR_DATA[34],WR_DATA[23:16]});
local_queue.push_back({WR_DATA[35],WR_DATA[31:24]});
end

end
// R-18
if (DATA_READ_WIDTH==18) begin

if(DATA_WRITE_WIDTH==9) begin // 9

if (count_enteries_push==0) begin

fwft_data1 = WR_DATA;

end

else if (count_enteries_push==1) begin

fwft_data2 = WR_DATA;

end
local_queue.push_back({WR_DATA[8], WR_DATA[7:0]});
end

else if(DATA_WRITE_WIDTH==18) begin // 18

if (count_enteries_push==0) begin
fwft_data1 = {WR_DATA[16],WR_DATA[7:0]};
fwft_data2 = {WR_DATA[17],WR_DATA[15:8]};
end
local_queue.push_back({WR_DATA[16],WR_DATA[7:0]});
local_queue.push_back({WR_DATA[17],WR_DATA[15:8]});
end

else begin // 36
if (count_enteries_push==0) begin
fwft_data1 = {WR_DATA[32],WR_DATA[7:0]};
fwft_data2 = {WR_DATA[33],WR_DATA[15:8]};
fwft_data3 = {WR_DATA[34],WR_DATA[23:16]};
fwft_data4 = {WR_DATA[35],WR_DATA[31:24]};
end
local_queue.push_back({WR_DATA[32],WR_DATA[7:0]});
local_queue.push_back({WR_DATA[33],WR_DATA[15:8]});
local_queue.push_back({WR_DATA[34],WR_DATA[23:16]});
local_queue.push_back({WR_DATA[35],WR_DATA[31:24]});
end
end

// R-36

if (DATA_READ_WIDTH==36) begin

if(DATA_WRITE_WIDTH==9) begin // 9

if (count_enteries_push==0) begin

fwft_data1 = WR_DATA;

end

else if (count_enteries_push==1) begin

fwft_data2 = WR_DATA;

end

else if (count_enteries_push==2) begin

fwft_data3 = WR_DATA;

end

else if (count_enteries_push==3) begin

fwft_data4 = WR_DATA;

end
local_queue.push_back({WR_DATA[8], WR_DATA[7:0]});
end

else if(DATA_WRITE_WIDTH==18) begin // 18

if (count_enteries_push==0) begin
fwft_data1 = {WR_DATA[16],WR_DATA[7:0]};
fwft_data2 = {WR_DATA[17],WR_DATA[15:8]};
end
else if (count_enteries_push==1) begin
fwft_data3 = {WR_DATA[16],WR_DATA[7:0]};
fwft_data4 = {WR_DATA[17],WR_DATA[15:8]};
end
local_queue.push_back({WR_DATA[16],WR_DATA[7:0]});
local_queue.push_back({WR_DATA[17],WR_DATA[15:8]});
end

else begin // 36
if (count_enteries_push==0) begin
fwft_data1 = {WR_DATA[32],WR_DATA[7:0]};
fwft_data2 = {WR_DATA[33],WR_DATA[15:8]};
fwft_data3 = {WR_DATA[34],WR_DATA[23:16]};
fwft_data4 = {WR_DATA[35],WR_DATA[31:24]};
end
local_queue.push_back({WR_DATA[32],WR_DATA[7:0]});
local_queue.push_back({WR_DATA[33],WR_DATA[15:8]});
local_queue.push_back({WR_DATA[34],WR_DATA[23:16]});
local_queue.push_back({WR_DATA[35],WR_DATA[31:24]});
end
end

count_enteries_push=count_enteries_push+1;

/* ----------------------------------------------------------------- */
// $display("i== %0d ; check WR_DATA %0h; size %0d",i,WR_DATA, $size(WR_DATA));
WR_EN=0;

endtask : push


task pop();

// R-9

task pop();

if (DATA_READ_WIDTH==9) begin

if(DATA_WRITE_WIDTH==9) begin
exp_dout = local_queue.pop_front();
if (count_enteries_pop==4096) begin
compare(RD_DATA[8:0], fwft_data1);
end
else begin
exp_dout = local_queue.pop_front();
compare(RD_DATA,exp_dout);
end
end

if(DATA_WRITE_WIDTH==36) begin
if (count_enteries_pop==4096) begin
compare(RD_DATA, fwft_data1);
exp_dout = local_queue.pop_front();
exp_dout = local_queue.pop_front();
exp_dout = local_queue.pop_front();
end
else begin
exp_dout = local_queue.pop_front();
Expand All @@ -403,32 +507,32 @@ task pop();
end
///////////////////////////////////////////////////////////////////////////////////////

// R-18

else if (DATA_READ_WIDTH==18 ) begin

if(DATA_WRITE_WIDTH==9) begin
if (count_enteries_pop==2048) begin
pop_data1= local_queue.pop_front();
pop_data2= local_queue.pop_front();
$display("pop_data1%0h",pop_data1);
$display("pop_data2 %0h",pop_data2);
compare(RD_DATA[8:0], fwft_data1);

compare({RD_DATA[16],RD_DATA[7:0]}, fwft_data1);
compare({RD_DATA[17],RD_DATA[15:8]}, fwft_data2);

end
else begin
pop_data1= local_queue.pop_front();
pop_data2= local_queue.pop_front();
compare({RD_DATA[16], RD_DATA[7:0]}, {pop_data1[8], pop_data1[7:0]});
compare({RD_DATA[17], RD_DATA[15:8]}, {pop_data2[8], pop_data2[7:0]});
// $display("count_enteries_pop %0d RD_DATA %0h", count_enteries_pop, RD_DATA);
end
end

if(DATA_WRITE_WIDTH==18) begin

if (count_enteries_pop==2048) begin
pop_data1= local_queue.pop_front();
compare(RD_DATA[8:0], fwft_data1);
pop_data2= local_queue.pop_front();
compare({RD_DATA[16],RD_DATA[7:0]}, fwft_data1);
compare({RD_DATA[17],RD_DATA[15:8]}, fwft_data2);
end

else begin
Expand All @@ -443,27 +547,36 @@ task pop();
if(DATA_WRITE_WIDTH==36) begin

if (count_enteries_pop==2048) begin
pop_data1= local_queue.pop_front();

compare({RD_DATA[16], RD_DATA[7:0]}, fwft_data1);
compare({RD_DATA[17], RD_DATA[15:8]}, fwft_data2);
end

else begin
pop_data1= local_queue.pop_front();
pop_data2= local_queue.pop_front();
compare( {{RD_DATA[17], RD_DATA[15:8]},{RD_DATA[16], RD_DATA[7:0]}}, {{pop_data2[8], pop_data2[7:0]} ,{pop_data1[8], pop_data1[7:0]}});
compare({RD_DATA[16], RD_DATA[7:0]}, {pop_data1[8], pop_data1[7:0]});
compare( {{RD_DATA[17], RD_DATA[15:8]}}, {{pop_data2[8], pop_data2[7:0]}});
end
end

end

///////////////////////////////////////////////////////////////////////////////////////

// R-36

else if (DATA_READ_WIDTH==36 ) begin

if(DATA_WRITE_WIDTH==9) begin

if (count_enteries_pop==1024) begin
pop_data1= local_queue.pop_front();

compare({RD_DATA[32], RD_DATA[7:0]}, fwft_data1);
compare({RD_DATA[33], RD_DATA[15:8]}, fwft_data2);
compare({RD_DATA[34], RD_DATA[23:16]}, fwft_data3);
compare({RD_DATA[35], RD_DATA[31:24]}, fwft_data4);

end

else begin
Expand All @@ -480,9 +593,13 @@ task pop();
end

if(DATA_WRITE_WIDTH==18) begin
if (count_enteries_pop==1024) begin
pop_data1= local_queue.pop_front();
compare(RD_DATA[8:0], fwft_data1);

if (count_enteries_pop==1024) begin

compare({RD_DATA[32],RD_DATA[7:0]}, fwft_data1);
compare({RD_DATA[33],RD_DATA[15:8]}, fwft_data2);
compare({RD_DATA[34],RD_DATA[23:16]}, fwft_data3);
compare({RD_DATA[35],RD_DATA[31:24]}, fwft_data4);

end
else begin
Expand All @@ -503,9 +620,13 @@ task pop();

if(DATA_WRITE_WIDTH==36) begin

if (count_enteries_pop==1024) begin
pop_data1= local_queue.pop_front();
compare(RD_DATA[7:0], fwft_data1);
if (count_enteries_pop==1024) begin // Last enter poped is same as first word fall through

compare({RD_DATA[32],RD_DATA[7:0]}, fwft_data1);
compare({RD_DATA[33],RD_DATA[15:8]}, fwft_data2);
compare({RD_DATA[34],RD_DATA[23:16]}, fwft_data3);
compare({RD_DATA[35],RD_DATA[31:24]}, fwft_data4);

end
else begin
pop_data1= local_queue.pop_front();
Expand Down Expand Up @@ -595,14 +716,19 @@ endtask : pop
end
endtask

integer count_cmp=0;

task compare(input reg [DATA_READ_WIDTH-1:0] RD_DATA, exp_dout);

if(RD_DATA !== exp_dout) begin
$display("RD_DATA mismatch. DUT_Out: %0h, Expected_Out: %0h, Time: %0t", RD_DATA, exp_dout,$time);
error = error+1;
end
else if(debug)
$display("RD_DATA match. DUT_Out: %0d, Expected_Out: %0d, Time: %0t", RD_DATA, exp_dout,$time);
else if(debug) begin
$display("RD_DATA match. DUT_Out: %0h, Expected_Out: %0h, Time: %0t", RD_DATA, exp_dout,$time);
count_cmp = count_cmp+1;
$display("counting of byte compared including first word fall through, count is: %0d", count_cmp);
end
endtask

endmodule
Expand Down

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