work in progress

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@10358 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 173 insertions, 0 deletions

diff --git a/control_lib/giantfifo_tb.v b/control_lib/giantfifo_tb.v
new file mode 100644
index 000000000..87ecd97ae
--- /dev/null
+++ b/control_lib/giantfifo_tb.v
@@ -0,0 +1,173 @@
+module fifo_tb();
+
+   localparam WIDTH = 36;
+   reg clk, rst;
+   wire short_full, short_empty, long_full, long_empty, giant_full, giant_empty;
+   wire casc_full, casc_empty, casc2_full, casc2_empty;
+   reg 	read, write;
+   
+   wire [WIDTH-1:0] short_do, long_do, casc_do, casc2_do, giant_do;
+   reg [WIDTH-1:0]  di;
+
+   reg 	      clear = 0;
+   
+   shortfifo #(.WIDTH(WIDTH)) shortfifo
+     (.clk(clk),.rst(rst),.datain(di),.dataout(short_do),.clear(clear),
+      .read(read),.write(write),.full(short_full),.empty(short_empty));
+   
+   longfifo #(.WIDTH(WIDTH), .SIZE(4)) longfifo
+     (.clk(clk),.rst(rst),.datain(di),.dataout(long_do),.clear(clear),
+      .read(read),.write(write),.full(long_full),.empty(long_empty));
+   
+   cascadefifo #(.WIDTH(WIDTH), .SIZE(4)) cascadefifo
+     (.clk(clk),.rst(rst),.datain(di),.dataout(casc_do),.clear(clear),
+      .read(read),.write(write),.full(casc_full),.empty(casc_empty));
+   
+   cascadefifo2 #(.WIDTH(WIDTH), .SIZE(4)) cascadefifo2
+     (.clk(clk),.rst(rst),.datain(di),.dataout(casc2_do),.clear(clear),
+      .read(read),.write(write),.full(casc2_full),.empty(casc2_empty));
+
+   wire [17:0] RAM_D;
+   wire [18:0] RAM_A;
+   wire        RAM_CLK, RAM_WEn, RAM_LDn, RAM_CE1n, RAM_OEn, RAM_CENn;
+   
+   giantfifo #(.WIDTH(WIDTH)) giantfifo
+     (.clk(clk),.rst(rst),.datain(di),.dataout(giant_do),.clear(clear),
+      .read(read),.write(write),.full(giant_full),.empty(giant_empty),
+      .RAM_D(RAM_D),.RAM_A(RAM_A),.RAM_CE1n(RAM_CE1n),.RAM_CENn(RAM_CENn),
+      .RAM_CLK(RAM_CLK),.RAM_WEn(RAM_WEn),.RAM_OEn(RAM_OEn),.RAM_LDn(RAM_LDn)
+      );
+
+   wire        MODE = 1'b0;
+   cy1356 ram_model(.d(RAM_D),.clk(RAM_CLK),.a(RAM_A),
+		    .bws(2'b00),.we_b(RAM_WEn),.adv_lb(RAM_LDn),
+		    .ce1b(RAM_CE1n),.ce2(1'b1),.ce3b(1'b0),
+		    .oeb(RAM_OEn),.cenb(RAM_CENn),.mode(MODE) 
+		    );
+   
+   initial rst = 1;
+   initial #1000 rst = 0;
+   initial clk = 0;
+   always #50 clk = ~clk;
+   
+   initial di = 36'h300AE;
+   initial read = 0;
+   initial write = 0;
+
+   always @(posedge clk)
+     if(write)
+       di <= di + 1;
+   
+   always @(posedge clk)
+     begin
+	if(short_full != long_full)
+	  $display("Error: FULL mismatch");
+	if(short_empty != long_empty)
+	  $display("Note: EMPTY mismatch, usually not a problem (longfifo has 2 cycle latency)");
+	if(read & (short_do != long_do))
+	  $display("Error: DATA mismatch");
+     end
+   
+   initial $dumpfile("giantfifo_tb.vcd");
+   initial $dumpvars(0,fifo_tb);
+
+   initial
+     begin
+	@(negedge rst);
+	@(posedge clk);
+	repeat (10)
+	  @(posedge clk);
+	write <= 1;
+	@(posedge clk);
+	write <= 0;
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	read <= 1;
+	@(posedge clk);
+	read <= 0;
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+
+	repeat(10)
+	  begin
+	     write <= 1;
+	     @(posedge clk);
+	     write <= 0;
+	     @(posedge clk);
+	     @(posedge clk);
+	     @(posedge clk);
+	     read <= 1;
+	     @(posedge clk);
+	     read <= 0;
+	     @(posedge clk);
+	     @(posedge clk);
+	     @(posedge clk);
+	     @(posedge clk);
+	     @(posedge clk);
+	  end // repeat (10)
+	
+	write <= 1;
+	repeat (4)
+	  @(posedge clk);
+	write <= 0;
+	@(posedge clk);
+	read <= 1;
+	repeat (4)
+	  @(posedge clk);
+	read <= 0;
+	@(posedge clk);
+
+
+	write <= 1;
+	repeat (4)
+	  @(posedge clk);
+	write <= 0;
+	@(posedge clk);
+	repeat (4)
+	  begin
+	     read <= 1;
+	     @(posedge clk);
+	     read <= 0;
+	     @(posedge clk);
+	  end
+
+	write <= 1;
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	@(posedge clk);
+	read <= 1;
+	repeat (5)
+	  @(posedge clk);
+	write <= 0;
+	  @(posedge clk);
+	  @(posedge clk);
+	read <= 0;
+	@(posedge clk);
+
+	write <= 1;
+	repeat (16)
+	  @(posedge clk);
+	write <= 0;
+	@(posedge clk);
+	
+	read <= 1;
+	repeat (16)
+	  @(posedge clk);
+	read <= 0;
+	@(posedge clk);
+		 
+	repeat (10)
+	  @(posedge clk);
+	$finish;
+     end
+endmodule // longfifo_tb