diff options
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/gpif/gpif_tb.v | 46 | ||||
| -rw-r--r-- | usrp2/gpif/packet_splitter.v | 39 |
2 files changed, 58 insertions, 27 deletions
diff --git a/usrp2/gpif/gpif_tb.v b/usrp2/gpif/gpif_tb.v index 1cb84e9fb..a71796d86 100644 --- a/usrp2/gpif/gpif_tb.v +++ b/usrp2/gpif/gpif_tb.v @@ -12,12 +12,11 @@ module gpif_tb(); wire CF, DF; wire gpif_full_d, gpif_full_c; - wire [18:0] data_o, ctrl_o; - wire src_rdy, dst_rdy; + wire [18:0] data_o, ctrl_o, data_splt; + wire src_rdy, dst_rdy, src_rdy_splt, dst_rdy_splt; wire ctrl_src_rdy, ctrl_dst_rdy; assign ctrl_dst_rdy = 1; - assign dst_rdy = 1; initial $dumpfile("gpif_tb.vcd"); initial $dumpvars(0,gpif_tb); @@ -29,6 +28,8 @@ module gpif_tb(); wire [18:0] data_int; wire src_rdy_int, dst_rdy_int; + + assign dst_rdy_splt = 1; gpif_wr gpif_write (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst), @@ -47,19 +48,19 @@ module gpif_tb(); packet_splitter #(.FRAME_LEN(256)) rx_packet_splitter (.clk(sys_clk), .reset(sys_rst), .clear(0), .data_i(data_o), .src_rdy_i(src_rdy), .dst_rdy_o(dst_rdy), - .data_o(data_o), .src_rdy_o(src_rdy), .dst_rdy_i(dst_rdy)); + .data_o(data_splt), .src_rdy_o(src_rdy_splt), .dst_rdy_i(dst_rdy_splt)); always @(posedge sys_clk) if(ctrl_src_rdy & ctrl_dst_rdy) $display("CTRL: %x",ctrl_o); always @(posedge sys_clk) - if(src_rdy & dst_rdy) + if(src_rdy_splt & dst_rdy_splt) begin - if(data_o[16]) + if(data_splt[16]) $display("<-------- DATA SOF--------->"); - $display("DATA: %x",data_o); - if(data_o[17]) + $display("DATA: %x",data_splt); + if(data_splt[17]) $display("<-------- DATA EOF--------->"); end @@ -68,8 +69,10 @@ module gpif_tb(); #10000; repeat (1) begin + @(posedge gpif_clk); + WR <= 1; - gpif_data <= 10; // Length + gpif_data <= 256; // Length @(posedge gpif_clk); gpif_data <= 16'h00; @(posedge gpif_clk); @@ -79,20 +82,43 @@ module gpif_tb(); @(posedge gpif_clk); end WR <= 0; + + while(DF) + @(posedge gpif_clk); + repeat (16) + @(posedge gpif_clk); + + WR <= 1; + repeat(256) + begin + gpif_data <= gpif_data - 1; + @(posedge gpif_clk); + end + WR <= 0; + + +/* + while(DF) + @(posedge gpif_clk); + repeat (20) @(posedge gpif_clk); WR <= 1; gpif_data <= 16'h5; @(posedge gpif_clk); + gpif_data <= 16'h00; + @(posedge gpif_clk); repeat(254) begin gpif_data <= gpif_data - 1; @(posedge gpif_clk); end + WR <= 0; + */ end end // initial begin - initial #100000 $finish; + initial #200000 $finish; endmodule // gpif_tb diff --git a/usrp2/gpif/packet_splitter.v b/usrp2/gpif/packet_splitter.v index 43515dd8b..f8028a4df 100644 --- a/usrp2/gpif/packet_splitter.v +++ b/usrp2/gpif/packet_splitter.v @@ -19,6 +19,8 @@ module packet_splitter localparam PS_FRAME = 1; localparam PS_NEW_FRAME = 2; localparam PS_PAD = 3; + + wire eof_i = data_i[17]; always @(posedge clk) if(reset | clear) @@ -34,30 +36,33 @@ module packet_splitter end PS_FRAME : if(src_rdy_i & dst_rdy_i) - if(frame_len == 0) - if(length == 0) - state <= PS_IDLE; - else - begin - state <= PS_NEW_FRAME; - frame_len <= FRAME_LEN; - length <= length - 1; - end + if((frame_len == 2) & ((length == 2) | eof_i)) + state <= PS_IDLE; + else if(frame_len == 2) + begin + state <= PS_NEW_FRAME; + length <= length - 1; + end + else if((length == 2)|eof_i) + begin + frame_len <= frame_len - 1; + state <= PS_PAD; + end else - if(length == 0) - begin - frame_len <= frame_len - 1; - state <= PS_PAD; - end + begin + frame_len <= frame_len - 1; + length <= length - 1; + end PS_NEW_FRAME : if(src_rdy_i & dst_rdy_i) begin - frame_len <= frame_len - 1; + frame_len <= FRAME_LEN; state <= PS_FRAME; + length <= length - 1; end PS_PAD : if(dst_rdy_i) - if(frame_len == 0) + if(frame_len == 2) state <= PS_IDLE; else frame_len <= frame_len - 1; @@ -70,7 +75,7 @@ module packet_splitter assign src_rdy_o = src_rdy_i | (state == PS_PAD); wire occ_out = 0; - wire eof_out = (frame_len == 0) & (state != PS_IDLE); + wire eof_out = (frame_len == 2) & (state != PS_IDLE) & (state != PS_NEW_FRAME); wire sof_out = (state == PS_IDLE) | (state == PS_NEW_FRAME); wire [15:0] data_out = data_i[15:0]; |