-module newfifo_2clock
- #(parameter DWIDTH=32, AWIDTH=9)
- (input wclk, input [DWIDTH-1:0] datain, input src_rdy_i, output dst_rdy_o, output reg [AWIDTH-1:0] level_wclk,
- input rclk, output [DWIDTH-1:0] dataout, output src_rdy_o, input dst_rdy_i, output reg [AWIDTH-1:0] level_rclk,
- input arst);
+// FIXME ignores the AWIDTH (fifo size) parameter
- wire full, empty, write, read;
+module fifo_2clock
+ #(parameter WIDTH=32, SIZE=9)
+ (input wclk, input [WIDTH-1:0] datain, input src_rdy_i, output dst_rdy_o, output [15:0] space,
+ input rclk, output [WIDTH-1:0] dataout, output src_rdy_o, input dst_rdy_i, output [15:0] occupied,
+ input arst);
+
+ wire [SIZE-1:0] level_rclk, level_wclk;
+ wire full, empty, write, read;
assign dst_rdy_o = ~full;
assign src_rdy_o = ~empty;
assign write = src_rdy_i & dst_rdy_o;
assign read = src_rdy_o & dst_rdy_i;
-
-//`define USE_XLNX_FIFO 1
-`ifdef USE_XLNX_FIFO
+
fifo_xlnx_512x36_2clk mac_tx_fifo_2clk
(.rst(rst),
- .wr_clk(wclk),.din(datain),.full(full),.wr_en(write),.wr_data_count(fifo_occupied[8:0]),
- .rd_clk(rclk),.dout(dataout),.empty(empty),.rd_en(read),.rd_data_count() );
+ .wr_clk(wclk),.din(datain),.full(full),.wr_en(write),.wr_data_count(level_wclk),
+ .rd_clk(rclk),.dout(dataout),.empty(empty),.rd_en(read),.rd_data_count(level_rclk) );
+
+ assign occupied = {{(16-SIZE){1'b0}},level_rclk};
+ assign space = ((1<<SIZE)-1)-level_wclk;
+
+endmodule // fifo_2clock
+
+/*
`else
// ISE sucks, so the following doesn't work properly
level_rclk <= wr_addr_rclk - rd_addr;
`endif
endmodule // fifo_2clock
+
+*/
-module cascadefifo_2clock
- #(parameter DWIDTH=32, AWIDTH=9)
- (input wclk, input [DWIDTH-1:0] datain, input src_rdy_i, output dst_rdy_o, output [AWIDTH-1:0] level_wclk,
- input rclk, output [DWIDTH-1:0] dataout, output src_rdy_o, input dst_rdy_i, output [AWIDTH-1:0] level_rclk,
- input arst);
-
- wire [DWIDTH-1:0] data_int1, data_int2;
- wire src_rdy_int1, src_rdy_int2, dst_rdy_int1, dst_rdy_int2;
+module fifo_2clock_cascade
+ #(parameter WIDTH=32, SIZE=9)
+ (input wclk, input [WIDTH-1:0] datain, input src_rdy_i, output dst_rdy_o, output [15:0] space,
+ input rclk, output [WIDTH-1:0] dataout, output src_rdy_o, input dst_rdy_i, output [15:0] occupied,
+ input arst);
+
+ wire [WIDTH-1:0] data_int1, data_int2;
+ wire src_rdy_int1, src_rdy_int2, dst_rdy_int1, dst_rdy_int2;
+ wire [SIZE-1:0] level_wclk, level_rclk;
+ wire [4:0] s1_space, s1_occupied, s2_space, s2_occupied;
+ wire [15:0] l_space, l_occupied;
- fifo_short #(.WIDTH(DWIDTH)) shortfifo
+ fifo_short #(.WIDTH(WIDTH)) shortfifo
(.clk(wclk), .reset(arst), .clear(0),
.datain(datain), .src_rdy_i(src_rdy_i), .dst_rdy_o(dst_rdy_o),
- .dataout(data_int1), .src_rdy_o(src_rdy_int1), .dst_rdy_i(dst_rdy_int1) );
+ .dataout(data_int1), .src_rdy_o(src_rdy_int1), .dst_rdy_i(dst_rdy_int1),
+ .space(s1_space), .occupied(s1_occupied) );
- newfifo_2clock #(.DWIDTH(DWIDTH),.AWIDTH(AWIDTH)) fifo_2clock
- (.wclk(wclk), .datain(data_int1), .src_rdy_i(src_rdy_int1), .dst_rdy_o(dst_rdy_int1), .level_wclk(level_wclk),
- .rclk(rclk), .dataout(data_int2), .src_rdy_o(src_rdy_int2), .dst_rdy_i(dst_rdy_int2), .level_rclk(level_rclk),
+ fifo_2clock #(.DWIDTH(WIDTH),.SIZE(SIZE)) fifo_2clock
+ (.wclk(wclk), .datain(data_int1), .src_rdy_i(src_rdy_int1), .dst_rdy_o(dst_rdy_int1), .space(l_space),
+ .rclk(rclk), .dataout(data_int2), .src_rdy_o(src_rdy_int2), .dst_rdy_i(dst_rdy_int2), .occupied(l_occupied),
.arst(arst) );
-
- fifo_short #(.WIDTH(DWIDTH)) shortfifo2
+
+ fifo_short #(.WIDTH(WIDTH)) shortfifo2
(.clk(rclk), .reset(arst), .clear(0),
.datain(data_int2), .src_rdy_i(src_rdy_int2), .dst_rdy_o(dst_rdy_int2),
- .dataout(dataout), .src_rdy_o(src_rdy_o), .dst_rdy_i(dst_rdy_i) );
-
-endmodule // fifo_2clock_casc
+ .dataout(dataout), .src_rdy_o(src_rdy_o), .dst_rdy_i(dst_rdy_i),
+ .space(s2_space), .occupied(s2_occupied));
+ // Be conservative -- Only advertise space from input side of fifo, occupied from output side
+ assign space = {11'b0,s1_space} + l_space;
+ assign occupied = {11'b0,s2_occupied} + l_occupied;
+
+endmodule // fifo_2clock_cascade
+++ /dev/null
-module fifo_new_tb();
-
- reg clk = 0;
- reg rst = 1;
- reg clear = 0;
- initial #1000 rst = 0;
- always #50 clk = ~clk;
-
- reg [31:0] f36_data = 0;
- reg [1:0] f36_occ = 0;
- reg f36_sof = 0, f36_eof = 0;
-
- wire [35:0] f36_in = {f36_occ,f36_eof,f36_sof,f36_data};
- reg src_rdy_f36i = 0;
- wire dst_rdy_f36i;
-
- wire [35:0] f36_out, f36_out2;
- wire src_rdy_f36o;
- reg dst_rdy_f36o = 0;
-
- //fifo_cascade #(.WIDTH(36), .SIZE(4)) fifo_cascade36
- //fifo_long #(.WIDTH(36), .SIZE(4)) fifo_cascade36
-
- wire i1_sr, i1_dr;
- wire i2_sr, i2_dr;
- wire i3_sr, i3_dr;
- reg i4_dr = 0;
- wire i4_sr;
-
- wire [35:0] i1, i4;
- wire [18:0] i2, i3;
-
- wire [7:0] ll_data;
- wire ll_src_rdy_n, ll_dst_rdy_n, ll_sof_n, ll_eof_n;
-
- fifo_short #(.WIDTH(36)) fifo_short1
- (.clk(clk),.reset(rst),.clear(clear),
- .datain(f36_in),.src_rdy_i(src_rdy_f36i),.dst_rdy_o(dst_rdy_f36i),
- .dataout(i1),.src_rdy_o(i1_sr),.dst_rdy_i(i1_dr) );
-
- fifo36_to_fifo19 fifo36_to_fifo19
- (.clk(clk),.reset(rst),.clear(clear),
- .f36_datain(i1),.f36_src_rdy_i(i1_sr),.f36_dst_rdy_o(i1_dr),
- .f19_dataout(i2),.f19_src_rdy_o(i2_sr),.f19_dst_rdy_i(i2_dr) );
-
- fifo19_to_ll8 fifo19_to_ll8
- (.clk(clk),.reset(rst),.clear(clear),
- .f19_data(i2),.f19_src_rdy_i(i2_sr),.f19_dst_rdy_o(i2_dr),
- .ll_data(ll_data),.ll_sof_n(ll_sof_n),.ll_eof_n(ll_eof_n),
- .ll_src_rdy_n(ll_src_rdy_n),.ll_dst_rdy_n(ll_dst_rdy_n));
-
- ll8_to_fifo19 ll8_to_fifo19
- (.clk(clk),.reset(rst),.clear(clear),
- .ll_data(ll_data),.ll_sof_n(ll_sof_n),.ll_eof_n(ll_eof_n),
- .ll_src_rdy_n(ll_src_rdy_n),.ll_dst_rdy_n(ll_dst_rdy_n),
- .f19_data(i3),.f19_src_rdy_o(i3_sr),.f19_dst_rdy_i(i3_dr) );
-
- fifo19_to_fifo36 fifo19_to_fifo36
- (.clk(clk),.reset(rst),.clear(clear),
- .f19_datain(i3),.f19_src_rdy_i(i3_sr),.f19_dst_rdy_o(i3_dr),
- .f36_dataout(i4),.f36_src_rdy_o(i4_sr),.f36_dst_rdy_i(i4_dr) );
-
- task ReadFromFIFO36;
- begin
- $display("Read from FIFO36");
- #1 i4_dr <= 1;
- while(1)
- begin
- while(~i4_sr)
- @(posedge clk);
- $display("Read: %h",i4);
- @(posedge clk);
- end
- end
- endtask // ReadFromFIFO36
-
- reg [15:0] count;
- task PutPacketInFIFO36;
- input [31:0] data_start;
- input [31:0] data_len;
- begin
- count <= 4;
- src_rdy_f36i <= 1;
- f36_data <= data_start;
- f36_sof <= 1;
- f36_eof <= 0;
- f36_occ <= 0;
-
- $display("Put Packet in FIFO36");
- while(~dst_rdy_f36i)
- @(posedge clk);
- @(posedge clk);
- $display("PPI_FIFO36: Entered First Line");
- f36_sof <= 0;
- while(count+4 < data_len)
- begin
- f36_data <= f36_data + 32'h01010101;
- count <= count + 4;
- while(~dst_rdy_f36i)
- @(posedge clk);
- @(posedge clk);
- $display("PPI_FIFO36: Entered New Line");
- end
- f36_data <= f36_data + 32'h01010101;
- f36_eof <= 1;
- if(count + 4 == data_len)
- f36_occ <= 0;
- else if(count + 3 == data_len)
- f36_occ <= 3;
- else if(count + 2 == data_len)
- f36_occ <= 2;
- else
- f36_occ <= 1;
- while(~dst_rdy_f36i)
- @(posedge clk);
- @(posedge clk);
- f36_occ <= 0;
- f36_eof <= 0;
- f36_data <= 0;
- src_rdy_f36i <= 0;
- $display("PPI_FIFO36: Entered Last Line");
- end
- endtask // PutPacketInFIFO36
-
- initial $dumpfile("fifo_new_tb.vcd");
- initial $dumpvars(0,fifo_new_tb);
-
- initial
- begin
- @(negedge rst);
- //#10000;
- @(posedge clk);
- @(posedge clk);
- @(posedge clk);
- @(posedge clk);
- ReadFromFIFO36;
- end
-
- initial
- begin
- @(negedge rst);
- @(posedge clk);
- @(posedge clk);
- PutPacketInFIFO36(32'hA0B0C0D0,12);
- @(posedge clk);
- @(posedge clk);
- #10000;
- @(posedge clk);
- PutPacketInFIFO36(32'hE0F0A0B0,36);
- @(posedge clk);
- @(posedge clk);
- @(posedge clk);
- @(posedge clk);
- @(posedge clk);
- end
-
- initial #20000 $finish;
-endmodule // longfifo_tb
--- /dev/null
+module fifo_new_tb();
+
+ reg clk = 0;
+ reg rst = 1;
+ reg clear = 0;
+ initial #1000 rst = 0;
+ always #50 clk = ~clk;
+
+ reg [31:0] f36_data = 0;
+ reg [1:0] f36_occ = 0;
+ reg f36_sof = 0, f36_eof = 0;
+
+ wire [35:0] f36_in = {f36_occ,f36_eof,f36_sof,f36_data};
+ reg src_rdy_f36i = 0;
+ wire dst_rdy_f36i;
+
+ wire [35:0] f36_out, f36_out2;
+ wire src_rdy_f36o;
+ reg dst_rdy_f36o = 0;
+
+ //fifo_cascade #(.WIDTH(36), .SIZE(4)) fifo_cascade36
+ //fifo_long #(.WIDTH(36), .SIZE(4)) fifo_cascade36
+
+ wire i1_sr, i1_dr;
+ wire i2_sr, i2_dr;
+ wire i3_sr, i3_dr;
+ reg i4_dr = 0;
+ wire i4_sr;
+
+ wire [35:0] i1, i4;
+ wire [18:0] i2, i3;
+
+ wire [7:0] ll_data;
+ wire ll_src_rdy_n, ll_dst_rdy_n, ll_sof_n, ll_eof_n;
+
+ fifo_short #(.WIDTH(36)) fifo_short1
+ (.clk(clk),.reset(rst),.clear(clear),
+ .datain(f36_in),.src_rdy_i(src_rdy_f36i),.dst_rdy_o(dst_rdy_f36i),
+ .dataout(i1),.src_rdy_o(i1_sr),.dst_rdy_i(i1_dr) );
+
+ fifo36_to_fifo19 fifo36_to_fifo19
+ (.clk(clk),.reset(rst),.clear(clear),
+ .f36_datain(i1),.f36_src_rdy_i(i1_sr),.f36_dst_rdy_o(i1_dr),
+ .f19_dataout(i2),.f19_src_rdy_o(i2_sr),.f19_dst_rdy_i(i2_dr) );
+
+ fifo19_to_ll8 fifo19_to_ll8
+ (.clk(clk),.reset(rst),.clear(clear),
+ .f19_data(i2),.f19_src_rdy_i(i2_sr),.f19_dst_rdy_o(i2_dr),
+ .ll_data(ll_data),.ll_sof_n(ll_sof_n),.ll_eof_n(ll_eof_n),
+ .ll_src_rdy_n(ll_src_rdy_n),.ll_dst_rdy_n(ll_dst_rdy_n));
+
+ ll8_to_fifo19 ll8_to_fifo19
+ (.clk(clk),.reset(rst),.clear(clear),
+ .ll_data(ll_data),.ll_sof_n(ll_sof_n),.ll_eof_n(ll_eof_n),
+ .ll_src_rdy_n(ll_src_rdy_n),.ll_dst_rdy_n(ll_dst_rdy_n),
+ .f19_data(i3),.f19_src_rdy_o(i3_sr),.f19_dst_rdy_i(i3_dr) );
+
+ fifo19_to_fifo36 fifo19_to_fifo36
+ (.clk(clk),.reset(rst),.clear(clear),
+ .f19_datain(i3),.f19_src_rdy_i(i3_sr),.f19_dst_rdy_o(i3_dr),
+ .f36_dataout(i4),.f36_src_rdy_o(i4_sr),.f36_dst_rdy_i(i4_dr) );
+
+ task ReadFromFIFO36;
+ begin
+ $display("Read from FIFO36");
+ #1 i4_dr <= 1;
+ while(1)
+ begin
+ while(~i4_sr)
+ @(posedge clk);
+ $display("Read: %h",i4);
+ @(posedge clk);
+ end
+ end
+ endtask // ReadFromFIFO36
+
+ reg [15:0] count;
+ task PutPacketInFIFO36;
+ input [31:0] data_start;
+ input [31:0] data_len;
+ begin
+ count <= 4;
+ src_rdy_f36i <= 1;
+ f36_data <= data_start;
+ f36_sof <= 1;
+ f36_eof <= 0;
+ f36_occ <= 0;
+
+ $display("Put Packet in FIFO36");
+ while(~dst_rdy_f36i)
+ @(posedge clk);
+ @(posedge clk);
+ $display("PPI_FIFO36: Entered First Line");
+ f36_sof <= 0;
+ while(count+4 < data_len)
+ begin
+ f36_data <= f36_data + 32'h01010101;
+ count <= count + 4;
+ while(~dst_rdy_f36i)
+ @(posedge clk);
+ @(posedge clk);
+ $display("PPI_FIFO36: Entered New Line");
+ end
+ f36_data <= f36_data + 32'h01010101;
+ f36_eof <= 1;
+ if(count + 4 == data_len)
+ f36_occ <= 0;
+ else if(count + 3 == data_len)
+ f36_occ <= 3;
+ else if(count + 2 == data_len)
+ f36_occ <= 2;
+ else
+ f36_occ <= 1;
+ while(~dst_rdy_f36i)
+ @(posedge clk);
+ @(posedge clk);
+ f36_occ <= 0;
+ f36_eof <= 0;
+ f36_data <= 0;
+ src_rdy_f36i <= 0;
+ $display("PPI_FIFO36: Entered Last Line");
+ end
+ endtask // PutPacketInFIFO36
+
+ initial $dumpfile("fifo_new_tb.vcd");
+ initial $dumpvars(0,fifo_new_tb);
+
+ initial
+ begin
+ @(negedge rst);
+ //#10000;
+ @(posedge clk);
+ @(posedge clk);
+ @(posedge clk);
+ @(posedge clk);
+ ReadFromFIFO36;
+ end
+
+ initial
+ begin
+ @(negedge rst);
+ @(posedge clk);
+ @(posedge clk);
+ PutPacketInFIFO36(32'hA0B0C0D0,12);
+ @(posedge clk);
+ @(posedge clk);
+ #10000;
+ @(posedge clk);
+ PutPacketInFIFO36(32'hE0F0A0B0,36);
+ @(posedge clk);
+ @(posedge clk);
+ @(posedge clk);
+ @(posedge clk);
+ @(posedge clk);
+ end
+
+ initial #20000 $finish;
+endmodule // longfifo_tb
projects / debian / gnuradio / commitdiff