mostly just copied over from the rx side. Still needs a lot of work.

3 files changed, 221 insertions, 13 deletions

diff --git a/vrt/vita_tx.build b/vrt/vita_tx.build
new file mode 100755
index 000000000..2d65537d5
--- /dev/null
+++ b/vrt/vita_tx.build
@@ -0,0 +1 @@
+iverilog -Wimplict -Wportbind -y ../models -y . -y ../control_lib/ -y ../coregen -y /opt/Xilinx/10.1/ISE/verilog/src/XilinxCoreLib -y /opt/Xilinx/10.1/ISE/verilog/src/unisims/ -y ../timing -o vita_tx_tb vita_tx_tb.v
diff --git a/vrt/vita_tx_control.v b/vrt/vita_tx_control.v
index 2e96e6d42..5c5ad9fc9 100644
--- a/vrt/vita_tx_control.v
+++ b/vrt/vita_tx_control.v
@@ -1,28 +1,24 @@
 
-module vita_rx_control
+module vita_tx_control
   #(parameter BASE=0,
     parameter WIDTH=32)
    (input clk, input reset, input clear,
     input set_stb, input [7:0] set_addr, input [31:0] set_data,
     
     input [63:0] vita_time,
-    output overrun,
+    output underrun,
 
-    // To vita_rx_framer
-    output [4+64+WIDTH-1:0] sample_fifo_o,
-    output sample_fifo_src_rdy_o,
-    input sample_fifo_dst_rdy_i,
+    // From vita_tx_deframer
+    input [4+64+WIDTH-1:0] sample_fifo_o,
+    input sample_fifo_src_rdy_i,
+    output sample_fifo_dst_rdy_o,
     
-    // From DSP Core
-    input [WIDTH-1:0] sample,
+    // To DSP Core
+    output [WIDTH-1:0] sample,
     output run,
-    input strobe,
-    
-    output [31:0] debug_rx
+    input strobe
     );
 
-   // FIXME add TX Interruption (halt, pause, continue) functionality
-   
    wire [63:0] 	  new_time;
    wire [31:0] 	  new_command;
    wire 	  sc_pre1, clear_int, clear_reg;
diff --git a/vrt/vita_tx_tb.v b/vrt/vita_tx_tb.v
new file mode 100644
index 000000000..94b7bdd0b
--- /dev/null
+++ b/vrt/vita_tx_tb.v
@@ -0,0 +1,211 @@
+
+
+module vita_tx_tb;
+
+   localparam INTERP  = 8'd4;
+   localparam MAXCHAN=4;
+   localparam NUMCHAN=4;
+   
+   reg clk 	     = 0;
+   reg reset 	     = 1;
+
+   initial #1000 reset = 0;
+   always #50 clk = ~clk;
+
+   initial $dumpfile("vita_rx_tb.vcd");
+   initial $dumpvars(0,vita_rx_tb);
+
+   wire [(MAXCHAN*32)-1:0] sample;
+   wire        strobe, run;
+   wire [35:0] data_o;
+   wire        src_rdy;
+   reg 	       dst_rdy = 1;
+   wire [63:0] vita_time;
+
+   reg 	       set_stb = 0;
+   reg [7:0]   set_addr;
+   reg [31:0]  set_data;
+   wire        set_stb_dsp;
+   wire [7:0]  set_addr_dsp;
+   wire [31:0] set_data_dsp;
+
+   settings_bus_crossclock settings_bus_xclk_dsp
+     (.clk_i(clk), .rst_i(reset), .set_stb_i(set_stb), .set_addr_i(set_addr), .set_data_i(set_data),
+      .clk_o(clk), .rst_o(reset), .set_stb_o(set_stb_dsp), .set_addr_o(set_addr_dsp), .set_data_o(set_data_dsp));
+      
+   wire        sample_dst_rdy, sample_src_rdy;
+   //wire [99:0] sample_data_o;
+   wire [64+4+(MAXCHAN*32)-1:0] sample_data_o;
+
+   vita_rx_control #(.BASE(0), .WIDTH(32*MAXCHAN)) vita_rx_control
+     (.clk(clk), .reset(reset), .clear(0),
+      .set_stb(set_stb_dsp), .set_addr(set_addr_dsp), .set_data(set_data_dsp),
+      .vita_time(vita_time), .overrun(overrun),
+      .sample_fifo_o(sample_data_o), .sample_fifo_dst_rdy_i(sample_dst_rdy), .sample_fifo_src_rdy_o(sample_src_rdy),
+      .sample(sample), .run(run), .strobe(strobe));
+
+   vita_rx_framer #(.BASE(0), .MAXCHAN(MAXCHAN)) vita_rx_framer
+     (.clk(clk), .reset(reset), .clear(0),
+      .set_stb(set_stb_dsp), .set_addr(set_addr_dsp), .set_data(set_data_dsp),
+      .data_o(data_o), .dst_rdy_i(dst_rdy), .src_rdy_o(src_rdy),
+      .sample_fifo_i(sample_data_o), .sample_fifo_dst_rdy_o(sample_dst_rdy), .sample_fifo_src_rdy_i(sample_src_rdy),
+      .fifo_occupied(), .fifo_full(), .fifo_empty() );
+   
+   rx_dsp_model rx_dsp_model
+     (.clk(clk), .reset(reset), .run(run), .decim(DECIM), .strobe(strobe), .sample(sample[31:0]));
+
+   generate
+      if(MAXCHAN>1)
+	assign sample[(MAXCHAN*32)-1:32] = 0;
+   endgenerate
+   
+   time_64bit #(.TICKS_PER_SEC(120000000), .BASE(0)) time_64bit
+     (.clk(clk), .rst(reset),
+      .set_stb(set_stb_dsp), .set_addr(set_addr_dsp), .set_data(set_data_dsp),
+      .pps(0), .vita_time(vita_time));
+   
+   always @(posedge clk)
+     if(src_rdy & dst_rdy)
+       begin
+	  if(data_o[32] & ~data_o[33])
+	    begin
+	       $display("RX-PKT-START %d",$time);
+	       $display("       RX-PKT-DAT %x",data_o[31:0]);
+	    end
+	  else if(data_o[32] & data_o[33])
+	    begin
+	       $display("       RX-PKT-DAT %x -- With ERR",data_o[31:0]);
+	       $display("RX-PKT-ERR %d",$time);
+	    end
+	  else if(~data_o[32] & data_o[33])
+	    begin
+	       $display("       RX-PKT-DAT %x",data_o[31:0]);
+	       $display("RX-PKT-END %d",$time);
+	    end
+	  else
+	    $display("       RX-PKT DAT %x",data_o[31:0]);
+       end
+
+   initial 
+     begin
+	@(negedge reset);
+	@(posedge clk);
+	write_setting(4,32'hDEADBEEF);  // VITA header
+	write_setting(5,32'hF00D1234);  // VITA streamid
+	write_setting(6,32'h98765432);  // VITA trailer
+	write_setting(7,8);  // Samples per VITA packet
+	write_setting(8,NUMCHAN);  // Samples per VITA packet
+	queue_rx_cmd(1,0,8,32'h0,32'h0);  // send imm, single packet
+	queue_rx_cmd(1,0,16,32'h0,32'h0);  // send imm, 2 packets worth
+	queue_rx_cmd(1,0,7,32'h0,32'h0);  // send imm, 1 short packet worth
+	queue_rx_cmd(1,0,9,32'h0,32'h0);  // send imm, just longer than 1 packet
+	
+	queue_rx_cmd(1,1,16,32'h0,32'h0);  // chained
+	queue_rx_cmd(0,0,8,32'h0,32'h0);  // 2nd in chain
+	
+	queue_rx_cmd(1,1,17,32'h0,32'h0);  // chained, odd length
+	queue_rx_cmd(0,0,9,32'h0,32'h0);  // 2nd in chain, also odd length
+	
+	queue_rx_cmd(0,0,8,32'h0,32'h340);  // send at, on time
+	queue_rx_cmd(0,0,8,32'h0,32'h100);  // send at, but late
+
+	queue_rx_cmd(1,1,8,32'h0,32'h0);  // chained, but break chain
+	#100000;
+	$display("\nEnd chain with zero samples, shouldn't error\n");
+	queue_rx_cmd(1,1,8,32'h0,32'h0);  // chained
+	queue_rx_cmd(0,0,0,32'h0,32'h0);  // end chain with zero samples, should keep us out of error
+	#100000;
+
+	$display("\nEnd chain with zero samples on odd-length, shouldn't error\n");
+	queue_rx_cmd(1,1,14,32'h0,32'h0);  // chained
+	queue_rx_cmd(0,0,0,32'h0,32'h0);  // end chain with zero samples, should keep us out of error
+	#100000;
+	$display("Should have gotten 14 samples and EOF by now\n");
+	
+	queue_rx_cmd(1,1,9,32'h0,32'h0);  // chained, but break chain, odd length
+	#100000;
+	dst_rdy <= 0;  // stop pulling out of fifo so we can get an overrun
+	queue_rx_cmd(1,0,100,32'h0,32'h0);  // long enough to fill the fifos
+	queue_rx_cmd(1,0,5,32'h0,32'h0);  // this command waits until the previous error packet is sent
+	#100000;
+	dst_rdy <= 1;  // restart the reads so we can see what we got
+	#100000;
+	dst_rdy <= 0;  // stop pulling out of fifo so we can get an overrun
+	queue_rx_cmd(1,1,100,32'h0,32'h0);  // long enough to fill the fifos
+	//queue_rx_cmd(1,0,5,32'h0,32'h0);  // this command waits until the previous error packet is sent
+	#100000;
+	@(posedge clk);
+	dst_rdy <= 1;
+	  
+	#100000 $finish;
+     end
+
+   task write_setting;
+      input [7:0] addr;
+      input [31:0] data;
+      begin
+	 set_stb <= 0;
+	 @(posedge clk);
+	 set_addr <= addr;
+	 set_data <= data;
+	 set_stb  <= 1;
+	 @(posedge clk);
+	 set_stb <= 0;
+      end
+   endtask // write_setting
+   
+   task queue_rx_cmd;
+      input send_imm;
+      input chain;
+      input [29:0] lines;
+      input [31:0] secs;
+      input [31:0] tics;
+      begin
+	 write_setting(0,{send_imm,chain,lines});
+	 write_setting(1,secs);
+	 write_setting(2,tics);
+      end
+   endtask // queue_rx_cmd
+   
+endmodule // rx_control_tb
+
+module rx_dsp_model
+  (input clk, input reset,
+   input run,
+   input [7:0] decim,
+   output strobe,
+   output [31:0] sample);
+   
+   reg [15:0] 	  pktnum = 0;
+   reg [15:0] 	 counter = 0;
+
+   reg 		 run_d1;
+   always @(posedge clk) run_d1 <= run;
+   
+   always @(posedge clk)
+     if(run & ~run_d1)
+       begin
+	  counter 		<= 0;
+	  pktnum 		<= pktnum + 1;
+       end
+     else if(run & strobe)
+       counter 			<= counter + 1;
+       
+   assign sample 		 = {pktnum,counter};
+
+   reg [7:0] stb_ctr = 0;
+   
+   always @(posedge clk)
+     if(reset)
+       stb_ctr 	 <= 0;
+     else if(run & ~run_d1)
+       stb_ctr 	 <= 1;
+     else if(run)
+       if(stb_ctr == decim-1)
+	 stb_ctr <= 0;
+       else
+	 stb_ctr <= stb_ctr + 1;
+
+   assign strobe  = stb_ctr == decim-1;
+   
+endmodule // rx_dsp_model