never used, not needed

1 files changed, 0 insertions, 209 deletions

diff --git a/control_lib/giantfifo.v b/control_lib/giantfifo.v
deleted file mode 100644
index dba330b8a..000000000
--- a/control_lib/giantfifo.v
+++ /dev/null
@@ -1,209 +0,0 @@
-
-
-
-module giantfifo
-  #(parameter WIDTH=36)
-    (input clk, input rst,
-     input [WIDTH-1:0] datain,
-     output [WIDTH-1:0] dataout,
-     input read,
-     input write,
-     input clear,
-     output full,
-     output empty,
-     output [15:0] space,
-     output [15:0] occupied,
-     
-     // External RAM
-     inout [17:0] RAM_D,
-     output reg [18:0] RAM_A,
-     output RAM_CE1n,
-     output RAM_CENn,
-     output reg RAM_CLK,
-     output reg RAM_WEn,
-     output RAM_OEn,
-     output RAM_LDn
-     );
-
-   wire [4:0] path1_occ, path2_space;
-   wire [35:0] path1_dat, path2_dat;
-   
-   shortfifo #(.WIDTH(WIDTH)) sf1
-     (.clk(clk),.rst(rst),.clear(clear),
-      .datain(datain),.write(write),.full(full),
-      .dataout(path1_dat),.read(path1_read),.empty(path1_empty),
-      .space(),.occupied(path1_occ) );
-   wire       path1_almost_empty = (path1_occ == 5'd1);
-   
-   shortfifo #(.WIDTH(WIDTH)) sf2
-     (.clk(clk),.rst(rst),.clear(clear),
-      .datain(path2_dat),.write(path2_write),.full(path2_full),
-      .dataout(dataout),.read(read),.empty(empty),
-      .space(path2_space),.occupied() );
-   wire       path2_almost_full = (path2_space == 5'd1);
-	
-   assign     RAM_CE1n = 1'b0;
-   assign     RAM_CENn = 1'b0;
-   always @(clk)
-     RAM_CLK <= #2 clk;
-   assign     RAM_LDn = 1'b0;
-
-   // State machine
-   wire       write_now, read_now, idle, phase;
-   reg 	      ram_full, ram_empty;
-   
-   reg [17:0] read_ptr, write_ptr;
-   reg [2:0]  zbt_state;
-
-   localparam ZBT_IDLE = 0;
-   localparam ZBT_WRITE_UPPER = 2;
-   localparam ZBT_WRITE_LOWER = 3;
-   localparam ZBT_READ_UPPER = 4;
-   localparam ZBT_READ_LOWER = 5;
-
-   wire       can_write = ~ram_full & ~path1_empty;
-   wire       can_write_chain = can_write & ~path1_almost_empty;
-
-   wire       can_read = ~ram_empty & ~path2_full;
-   wire       can_read_chain = can_read & ~path2_almost_full;
-   
-   assign     phase = zbt_state[0];
-
-   reg [17:0] ram_occupied;
-   wire       ram_almost_empty = (write_ptr == (read_ptr+1'b1));
-   wire       ram_almost_full = ((write_ptr+1'b1) == read_ptr);
-
-   always @(posedge clk)
-     if(rst | clear)
-       begin
-	  zbt_state <= ZBT_IDLE;
-	  write_ptr <= 0;
-	  read_ptr <= 0;
-	  ram_full <= 0;
-	  ram_empty <= 1;
-	  ram_occupied <= 0;
-       end
-     else
-       case(zbt_state)
-	 ZBT_IDLE : 
-	   if(can_read) 
-	     zbt_state <= ZBT_READ_UPPER;
-	   else if(can_write)
-	     zbt_state <= ZBT_WRITE_UPPER;
-	 
-	 ZBT_WRITE_UPPER : 
-	   begin
-	      zbt_state <= ZBT_WRITE_LOWER;
-	      ram_occupied <= ram_occupied + 1;
-	      ram_empty <= 0;
-	      if(ram_occupied == 18'd10)
-		ram_full <= 1;
-	   end
-	 ZBT_WRITE_LOWER : 
-	   begin
-	      write_ptr <= write_ptr + 1;
-	      if(can_read_chain) 
-		zbt_state <= ZBT_READ_UPPER;
-	      else if(can_write_chain)
-		zbt_state <= ZBT_WRITE_UPPER;
-	      else
-		zbt_state <= ZBT_IDLE;
-	   end
-	 ZBT_READ_UPPER : 
-	   begin
-	      zbt_state <= ZBT_READ_LOWER;
-	      ram_occupied <= ram_occupied - 1;
-	      ram_full <= 0;
-	      if(ram_occupied == 18'd1)
-		ram_empty <= 1;
-	   end
-	 ZBT_READ_LOWER :
-	   begin
-	      read_ptr <= read_ptr + 1;
-	      if(can_read_chain) 
-		zbt_state <= ZBT_READ_UPPER;
-	      else if(can_write_chain)
-		zbt_state <= ZBT_WRITE_UPPER;
-	      else
-		zbt_state <= ZBT_IDLE;
-	   end
-	 default :
-	   zbt_state <= ZBT_IDLE;
-       endcase // case(zbt_state)
-
-   // Need to generate RAM_WEn, RAM_OEn, RAM_D, RAM_A;
-   assign path1_read = (zbt_state == ZBT_WRITE_LOWER);
-   reg 	  path2_write, delayed_read_upper, delayed_read_lower, delayed_write;
-
-   always @(posedge clk)
-     if(delayed_read_upper)
-       path2_dat[35:18] <= RAM_D;
-   always @(posedge clk)
-     if(delayed_read_lower)
-       path2_dat[17:0] <= RAM_D;
-
-   always @(posedge clk)
-     if(rst)
-       begin
-	  delayed_read_upper <= 0;
-	  delayed_read_lower <= 0;
-	  path2_write <= 0;
-       end
-     else 
-       begin
-	  delayed_read_upper <= (zbt_state == ZBT_READ_LOWER);
-	  delayed_read_lower <= delayed_read_upper;
-	  path2_write <= delayed_read_lower;
-       end
-   
-   reg [17:0] RAM_D_pre2, RAM_D_pre1, RAM_D_out;
-   
-   always @(posedge clk)
-     RAM_D_pre2 <= phase ? path1_dat[17:0] : path1_dat[35:18];
-
-   always @(posedge clk)  RAM_D_pre1 <= RAM_D_pre2;
-   always @(posedge clk)  RAM_D_out <= RAM_D_pre1;
-   reg 	      wr_del_1, wr_del_2; 	      
-   always @(posedge clk)
-     if(rst)
-       begin
-	  wr_del_1 <= 0;	  
-	  wr_del_2 <= 0;
-	  delayed_write <= 0;
-       end
-     else
-       begin
-	  delayed_write <= wr_del_2;
-	  wr_del_2 <= wr_del_1;
-	  wr_del_1 <= write_now;
-       end
-
-   reg delayed_read, rd_del_1, rd_del_2;
-   always @(posedge clk)
-     if(rst)
-       begin
-	  rd_del_1 <= 0;	  
-	  rd_del_2 <= 0;
-	  delayed_read <= 0;
-       end
-     else
-       begin
-	  delayed_read <= rd_del_2;
-	  rd_del_2 <= rd_del_1;
-	  rd_del_1 <= read_now;
-       end
-	  
-   assign     RAM_D = delayed_write ? RAM_D_out : 18'bzzzzzzzzzzzzzzzzzz;
-   assign     write_now = (zbt_state == ZBT_WRITE_UPPER) || (zbt_state == ZBT_WRITE_LOWER);
-   assign     read_now =  (zbt_state == ZBT_READ_UPPER) || (zbt_state == ZBT_READ_LOWER);
-   
-   always @(posedge clk)
-     RAM_A <= write_now ? {write_ptr,phase} : {read_ptr,phase};
-
-   always @(posedge clk)
-     RAM_WEn <= ~write_now;
-
-   assign     RAM_OEn = ~delayed_read;
-   assign     RAM_OEn = 0;
-   
-endmodule // giantfifo