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-rw-r--r--fpga/usrp2/extramfifo/ext_fifo_tb.v378
1 files changed, 378 insertions, 0 deletions
diff --git a/fpga/usrp2/extramfifo/ext_fifo_tb.v b/fpga/usrp2/extramfifo/ext_fifo_tb.v
new file mode 100644
index 000000000..0eda89769
--- /dev/null
+++ b/fpga/usrp2/extramfifo/ext_fifo_tb.v
@@ -0,0 +1,378 @@
+`timescale 1ns / 1ps
+`define INT_WIDTH 36
+`define EXT_WIDTH 18
+`define RAM_DEPTH 19
+`define FIFO_DEPTH 8
+`define DUMP_VCD_FULL
+
+module ext_fifo_tb();
+
+
+ reg int_clk;
+ reg ext_clk;
+ reg rst;
+
+
+
+ wire [`EXT_WIDTH-1:0] RAM_D_pi;
+ wire [`EXT_WIDTH-1:0] RAM_D_po;
+ wire [`EXT_WIDTH-1:0] RAM_D;
+ wire RAM_D_poe;
+ wire [`RAM_DEPTH-1:0] RAM_A;
+ wire RAM_WEn;
+ wire RAM_CENn;
+ wire RAM_LDn;
+ wire RAM_OEn;
+ wire RAM_CE1n;
+ reg [`INT_WIDTH-1:0] datain;
+ reg src_rdy_i; // WRITE
+ wire dst_rdy_o; // not FULL
+ wire [`INT_WIDTH-1:0] dataout;
+ reg [`INT_WIDTH-1:0] ref_dataout;
+ wire src_rdy_o; // not EMPTY
+ reg dst_rdy_i;
+ integer ether_frame;
+
+
+ // Clocks
+ // Int clock is 100MHz
+ // Ext clock is 125MHz
+ initial
+ begin
+ int_clk <= 0;
+ ext_clk <= 0;
+ ref_dataout <= 1;
+ src_rdy_i <= 0;
+ dst_rdy_i <= 0;
+ end
+
+ always
+ #5 int_clk <= ~int_clk;
+
+ always
+ #4 ext_clk <= ~ext_clk;
+
+ initial
+ begin
+ datain <= 0;
+ ether_frame <= 0;
+
+ rst <= 1;
+ repeat (5) @(negedge int_clk);
+ rst <= 0;
+ @(negedge int_clk);
+ while (datain < 10000)
+ begin
+ @(negedge int_clk);
+ datain <= datain + dst_rdy_o;
+ src_rdy_i <= dst_rdy_o;
+ // Simulate inter-frame time
+ if (ether_frame == 1500)
+ begin
+ ether_frame <= 0;
+ repeat(1600)
+ begin
+ @(negedge int_clk);
+ src_rdy_i <= 0;
+ end
+ end
+ else
+ ether_frame <= ether_frame + dst_rdy_o;
+ end
+ end // initial begin
+
+
+ initial
+ begin
+ repeat (5) @(negedge int_clk);
+ dst_rdy_i <= 1;
+
+ while (src_rdy_o !== 1)
+ @(negedge int_clk);
+
+ // Fall through fifo, first output already valid
+ if (dataout !== ref_dataout)
+ $display("Error: Expected %x, got %x @%d",ref_dataout, dataout, $time);
+ ref_dataout <= ref_dataout + src_rdy_o ;
+
+ // Decimate by 16 rate
+ while (ref_dataout < 2000)
+ begin
+ @(negedge int_clk);
+ ref_dataout <= ref_dataout + src_rdy_o ;
+ dst_rdy_i <= src_rdy_o;
+ if ((dataout !== ref_dataout) && src_rdy_o)
+ $display("Error: Expected %x, got %x @%d",ref_dataout, dataout, $time);
+ @(negedge int_clk);
+ dst_rdy_i <= 0;
+ repeat(14) @(negedge int_clk);
+ end // while (ref_dataout < 10000)
+ // Decimate by 8 rate
+ while (ref_dataout < 4000)
+ begin
+ @(negedge int_clk);
+ ref_dataout <= ref_dataout + src_rdy_o ;
+ dst_rdy_i <= src_rdy_o;
+ if ((dataout !== ref_dataout) && src_rdy_o)
+ $display("Error: Expected %x, got %x @%d",ref_dataout, dataout, $time);
+ @(negedge int_clk);
+ dst_rdy_i <= 0;
+ repeat(6) @(negedge int_clk);
+ end // while (ref_dataout < 10000)
+ // Decimate by 4 rate
+ while (ref_dataout < 6000)
+ begin
+ @(negedge int_clk);
+ ref_dataout <= ref_dataout + src_rdy_o ;
+ dst_rdy_i <= src_rdy_o;
+ if ((dataout !== ref_dataout) && src_rdy_o)
+ $display("Error: Expected %x, got %x @%d",ref_dataout, dataout, $time);
+ @(negedge int_clk);
+ dst_rdy_i <= 0;
+ repeat(2) @(negedge int_clk);
+ end // while (ref_dataout < 10000)
+ // Max rate
+ while (ref_dataout < 10000)
+ begin
+ @(negedge int_clk);
+ ref_dataout <= ref_dataout + src_rdy_o ;
+ dst_rdy_i <= src_rdy_o;
+ if ((dataout !== ref_dataout) && src_rdy_o)
+ $display("Error: Expected %x, got %x @%d",ref_dataout, dataout, $time);
+
+ end // while (ref_dataout < 10000)
+
+ @(negedge int_clk);
+ $finish;
+
+ end
+
+
+/* -----\/----- EXCLUDED -----\/-----
+
+ initial
+ begin
+ rst <= 1;
+ repeat (5) @(negedge int_clk);
+ rst <= 0;
+ @(negedge int_clk);
+ repeat (4000)
+ begin
+ @(negedge int_clk);
+ datain <= datain + dst_rdy_o;
+ src_rdy_i <= dst_rdy_o;
+// @(negedge int_clk);
+// src_rdy_i <= 0;
+// @(negedge int_clk);
+// dst_rdy_i <= src_rdy_o;
+// @(negedge int_clk);
+// dst_rdy_i <= 0;
+// repeat (2) @(negedge int_clk);
+ end // repeat (1000)
+ // Fall through fifo, first output already valid
+ if (dataout !== ref_dataout)
+ $display("Error: Expected %x, got %x",ref_dataout, dataout);
+ repeat (1000)
+ begin
+ @(negedge int_clk);
+ datain <= datain + dst_rdy_o ;
+ src_rdy_i <= dst_rdy_o;
+ @(negedge int_clk);
+ src_rdy_i <= 0;
+ @(negedge int_clk);
+ ref_dataout <= ref_dataout + src_rdy_o ;
+ dst_rdy_i <= src_rdy_o;
+ if ((dataout !== ref_dataout) && src_rdy_o)
+ $display("Error: Expected %x, got %x",ref_dataout, dataout);
+ @(negedge int_clk);
+ dst_rdy_i <= 0;
+// repeat (2) @(negedge int_clk);
+ end // repeat (1000)
+ repeat (1000)
+ begin
+// @(negedge int_clk);
+// datain <= datain + 1;
+// src_rdy_i <= 1;
+// @(negedge int_clk);
+// src_rdy_i <= 0;
+ @(negedge int_clk);
+ ref_dataout <= ref_dataout + src_rdy_o;
+ dst_rdy_i <= src_rdy_o;
+ if ((dataout !== ref_dataout) && src_rdy_o)
+ $display("Error: Expected %x, got %x",ref_dataout, dataout);
+ @(negedge int_clk);
+ dst_rdy_i <= 0;
+// repeat (2) @(negedge int_clk);
+ end // repeat (1000)
+
+ $finish;
+
+ end // initial begin
+
+
+ -----/\----- EXCLUDED -----/\----- */
+ ///////////////////////////////////////////////////////////////////////////////////
+ // Simulation control //
+ ///////////////////////////////////////////////////////////////////////////////////
+ `ifdef DUMP_LX2_TOP
+ // Set up output files
+ initial begin
+ $dumpfile("ext_fifo_tb.lx2");
+ $dumpvars(1,ext_fifo_tb);
+ end
+ `endif
+
+ `ifdef DUMP_LX2_FULL
+ // Set up output files
+ initial begin
+ $dumpfile("ext_fifo_tb.lx2");
+ $dumpvars(0,ext_fifo_tb);
+ end
+ `endif
+
+ `ifdef DUMP_VCD_TOP
+ // Set up output files
+ initial begin
+ $dumpfile("ext_fifo_tb.vcd");
+ $dumpvars(1,ext_fifo_tb);
+ end
+ `endif
+
+ `ifdef DUMP_VCD_TOP_PLUS_NEXT
+ // Set up output files
+ initial begin
+ $dumpfile("ext_fifo_tb.vcd");
+ $dumpvars(2,ext_fifo_tb);
+ end
+ `endif
+
+
+ `ifdef DUMP_VCD_FULL
+ // Set up output files
+ initial begin
+ $dumpfile("ext_fifo_tb.vcd");
+ $dumpvars(0,ext_fifo_tb);
+ end
+ `endif
+
+ // Update display every 10 us
+ always #10000 $monitor("Time in uS ",$time/1000);
+
+ wire [`EXT_WIDTH-1:0] RAM_D_pi_ext;
+ wire [`EXT_WIDTH-1:0] RAM_D_po_ext;
+ wire [`EXT_WIDTH-1:0] RAM_D_ext;
+ wire RAM_D_poe_ext;
+
+ genvar i;
+
+ //
+ // Instantiate IO for Bidirectional bus to SRAM
+ //
+
+ generate
+ for (i=0;i<18;i=i+1)
+ begin : gen_RAM_D_IO
+
+ IOBUF #(
+ .DRIVE(12),
+ .IOSTANDARD("LVCMOS25"),
+ .SLEW("FAST")
+ )
+ RAM_D_i (
+ .O(RAM_D_pi_ext[i]),
+ .I(RAM_D_po_ext[i]),
+ .IO(RAM_D[i]),
+ .T(RAM_D_poe_ext)
+ );
+ end // block: gen_RAM_D_IO
+
+ endgenerate
+
+ wire [`RAM_DEPTH-1:0] RAM_A_ext;
+ wire RAM_WEn_ext,RAM_LDn_ext,RAM_CE1n_ext,RAM_OEn_ext,RAM_CENn_ext;
+
+ assign #1 RAM_D_pi = RAM_D_pi_ext;
+
+ assign #1 RAM_D_po_ext = RAM_D_po;
+
+ assign #1 RAM_D_poe_ext = RAM_D_poe;
+
+ assign #2 RAM_WEn_ext = RAM_WEn;
+
+ assign #2 RAM_LDn_ext = RAM_LDn;
+
+ assign #2 RAM_CE1n_ext = RAM_CE1n;
+
+ assign #2 RAM_OEn_ext = RAM_OEn;
+
+ assign #2 RAM_CENn_ext = RAM_CENn;
+
+ assign #2 RAM_A_ext = RAM_A;
+
+
+
+ idt71v65603s150 idt71v65603s150_i1
+ (
+ .A(RAM_A_ext[17:0]),
+ .adv_ld_(RAM_LDn_ext), // advance (high) / load (low)
+ .bw1_(1'b0),
+ .bw2_(1'b0),
+ .bw3_(1'b1),
+ .bw4_(1'b1), // byte write enables (low)
+ .ce1_(RAM_CE1n_ext),
+ .ce2(1'b1),
+ .ce2_(1'b0), // chip enables
+ .cen_(RAM_CENn_ext), // clock enable (low)
+ .clk(ext_clk), // clock
+ .IO({RAM_D[16:9],RAM_D[7:0]}),
+ .IOP({RAM_D[17],RAM_D[8]}), // data bus
+ .lbo_(1'b0), // linear burst order (low)
+ .oe_(RAM_OEn_ext), // output enable (low)
+ .r_w_(RAM_WEn_ext)
+ ); // read (high) / write (low)
+
+/* -----\/----- EXCLUDED -----\/-----
+
+
+ cy1356 cy1356_i1
+ ( .d(RAM_D),
+ .clk(ext_clk),
+ .a(RAM_A_ext),
+ .bws(2'b00),
+ .we_b(RAM_WEn_ext),
+ .adv_lb(RAM_LDn_ext),
+ .ce1b(RAM_CE1n_ext),
+ .ce2(1'b1),
+ .ce3b(1'b0),
+ .oeb(RAM_OEn_ext),
+ .cenb(RAM_CENn_ext),
+ .mode(1'b0)
+ );
+ -----/\----- EXCLUDED -----/\----- */
+
+
+ ext_fifo
+ #(.INT_WIDTH(`INT_WIDTH),.EXT_WIDTH(`EXT_WIDTH),.RAM_DEPTH(`RAM_DEPTH),.FIFO_DEPTH(`FIFO_DEPTH))
+ ext_fifo_i1
+ (
+ .int_clk(int_clk),
+ .ext_clk(ext_clk),
+ .rst(rst),
+ .RAM_D_pi(RAM_D_pi),
+ .RAM_D_po(RAM_D_po),
+ .RAM_D_poe(RAM_D_poe),
+ .RAM_A(RAM_A),
+ .RAM_WEn(RAM_WEn),
+ .RAM_CENn(RAM_CENn),
+ .RAM_LDn(RAM_LDn),
+ .RAM_OEn(RAM_OEn),
+ .RAM_CE1n(RAM_CE1n),
+ .datain(datain),
+ .src_rdy_i(src_rdy_i), // WRITE
+ .dst_rdy_o(dst_rdy_o), // not FULL
+ .dataout(dataout),
+ .src_rdy_o(src_rdy_o), // not EMPTY
+ .dst_rdy_i(dst_rdy_i)
+ );
+
+endmodule // ext_fifo_tb
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 22:51:46 +0000