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module vita_rx_tb;
localparam DECIM = 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), .set_addr(set_addr), .set_data(set_data),
.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), .set_addr(set_addr), .set_data(set_data),
.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), .set_addr(set_addr), .set_data(set_data),
.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
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