1 files changed, 0 insertions, 139 deletions
diff --git a/fpga/usrp2/control_lib/double_buffer.v b/fpga/usrp2/control_lib/double_buffer.v
deleted file mode 100644
index 8865bddee..000000000
--- a/fpga/usrp2/control_lib/double_buffer.v
+++ /dev/null
@@ -1,139 +0,0 @@
-//
-// Copyright 2011 Ettus Research LLC
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-//
-
-module double_buffer
-  #(parameter BUF_SIZE = 9)
-   (input clk, input reset, input clear,
-
-    // Random access interface to RAM
-    input access_we,
-    input access_stb,
-    output access_ok,
-    input access_done,
-    input access_skip_read,
-    input [BUF_SIZE-1:0] access_adr,
-    output [BUF_SIZE-1:0] access_len,
-    input [35:0] access_dat_i,   
-    output [35:0] access_dat_o,
-    
-    // Write FIFO Interface
-    input [35:0] data_i,
-    input src_rdy_i,
-    output dst_rdy_o,
-    
-    // Read FIFO Interface
-    output [35:0] data_o,
-    output src_rdy_o,
-    input dst_rdy_i
-    );
-
-   wire [35:0] data_o_0, data_o_1;
-
-   wire        read, read_ok, read_ptr, read_done;
-   wire        write, write_ok, write_ptr, write_done;
-   
-   wire [BUF_SIZE-1:0] rw0_adr, rw1_adr;
-   reg [BUF_SIZE-1:0]  read_adr, write_adr;
-   reg [BUF_SIZE-1:0]  len0, len1;
- 
-   assign data_o = read_ptr ? data_o_1 : data_o_0;
-   assign rw0_adr = (write_ok & ~write_ptr) ? write_adr : read_adr;
-   assign rw1_adr = (write_ok & write_ptr) ? write_adr : read_adr;
-   
-   wire [35:0] 	       access_dat_o_0, access_dat_o_1;
-   wire 	       access_ptr;
-   assign access_dat_o = access_ptr? access_dat_o_1 : access_dat_o_0;
-   
-   dbsm dbsm 
-     (.clk(clk), .reset(reset), .clear(clear),
-      .write_ok(write_ok), .write_ptr(write_ptr), .write_done(write_done),
-      .access_ok(access_ok), .access_ptr(access_ptr), .access_done(access_done), .access_skip_read(access_skip_read),
-      .read_ok(read_ok), .read_ptr(read_ptr), .read_done(read_done));
-   
-   // Port A for random access, Port B for FIFO read and write
-   ram_2port #(.DWIDTH(36),.AWIDTH(BUF_SIZE)) buffer0
-     (.clka(clk),.ena(access_stb & access_ok & (access_ptr == 0)),.wea(access_we),
-      .addra(access_adr),.dia(access_dat_i),.doa(access_dat_o_0),
-      .clkb(clk),.enb((read & read_ok & ~read_ptr)|(write & write_ok & ~write_ptr) ),.web(write&write_ok&~write_ptr),
-      .addrb(rw0_adr),.dib(data_i),.dob(data_o_0));
-   
-   ram_2port #(.DWIDTH(36),.AWIDTH(BUF_SIZE)) buffer1
-     (.clka(clk),.ena(access_stb & access_ok & (access_ptr == 1)),.wea(access_we),
-      .addra(access_adr),.dia(access_dat_i),.doa(access_dat_o_1),
-      .clkb(clk),.enb((read & read_ok & read_ptr)|(write & write_ok & write_ptr) ),.web(write&write_ok&write_ptr),
-      .addrb(rw1_adr),.dib(data_i),.dob(data_o_1));
-
-   // Write into buffers
-   assign dst_rdy_o =  write_ok;
-   assign write = src_rdy_i & write_ok;
-   assign write_done = write & data_i[33]; // done
-   always @(posedge clk)
-     if(reset | clear)
-       write_adr <= 0;
-     else
-       if(write_done)
-	 begin
-	    write_adr <= 0;
-	    if(write_ptr)
-	      len1 <= write_adr + 1;
-	    else
-	      len0 <= write_adr + 1;
-	 end
-       else if(write)
-	 write_adr <= write_adr + 1;
-
-   assign access_len = access_ptr ? len1 : len0;
-   
-   reg [1:0] 	       read_state;
-   localparam IDLE = 0;
-   localparam PRE_READ = 1;
-   localparam READING = 2;
-   
-   always @(posedge clk)
-     if(reset | clear)
-       begin
-	  read_state <= IDLE;
-	  read_adr <= 0;
-       end
-     else
-       case(read_state)
-	 IDLE :
-	   begin
-	      read_adr <= 0;
-	      if(read_ok)
-		read_state <= PRE_READ;
-	   end
-	 PRE_READ :
-	   begin
-	      read_state <= READING;
-	      read_adr <= 1;
-	   end
-	 
-	 READING :
-	   if(dst_rdy_i)
-	     begin
-		read_adr <= read_adr + 1;
-		if(data_o[33])
-		  read_state <= IDLE;
-	     end
-       endcase // case (read_state)
-      
-   assign read = ~((read_state==READING)& ~dst_rdy_i);
-   assign read_done = data_o[33] & dst_rdy_i & src_rdy_o;
-   assign src_rdy_o = (read_state == READING);
-   
-endmodule // double_buffer