Squashed B200 FPGA Source. Code from Josh Blum, Ian Buckley, and Matt Ettus.

Original-commit: 0df4b801a34697f2058b4a7b95e08d2a0576c9db
2013-10-10 10:17:27 -07:00
commit c91b74de33
488 changed files with 281740 additions and 0 deletions
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+
+module context_packet_gen
+  (input clk, input reset, input clear,
+   input trigger,
+   input [11:0] seqnum,
+   input [31:0] sid,
+   input [63:0] body,
+   input [63:0] vita_time,
+
+   output done,
+   output reg [63:0] o_tdata, output o_tlast, output o_tvalid, input o_tready);
+   
+   reg [1:0] 	     cp_state;
+   localparam CP_IDLE = 2'd0;
+   localparam CP_HEAD = 2'd1;
+   localparam CP_TIME = 2'd2;
+   localparam CP_DATA = 2'd3;
+   
+   always @(posedge clk)
+     if(reset|clear)
+       cp_state <= CP_IDLE;
+     else
+       case(cp_state)
+	 CP_IDLE :
+	   if(trigger)
+	     cp_state <= CP_HEAD;
+	 CP_HEAD :
+	   if(o_tready)
+	     cp_state <= CP_TIME;
+	 CP_TIME :
+	   if(o_tready)
+	     cp_state <= CP_DATA;
+	 CP_DATA :
+	   if(o_tready)
+	     cp_state <= CP_IDLE;
+       endcase // case (cp_state)
+
+   assign o_tvalid = (cp_state != CP_IDLE);
+   assign o_tlast = (cp_state == CP_DATA);
+
+   always @*
+     case(cp_state)
+       CP_HEAD : o_tdata <= { 4'hA, seqnum, 16'd24, sid };
+       CP_TIME : o_tdata <= vita_time;
+       CP_DATA : o_tdata <= body;
+       default : o_tdata <= body;
+     endcase // case (cp_state)
+
+   assign done = o_tlast & o_tvalid & o_tready;
+   
+endmodule // context_packet_gen