moved usrp1 and usrp2 fpga dirs into fpga subdirectory

1 files changed, 107 insertions, 0 deletions

diff --git a/fpga/usrp2/control_lib/wb_regfile_2clock.v b/fpga/usrp2/control_lib/wb_regfile_2clock.v
new file mode 100644
index 000000000..e248e5161
--- /dev/null
+++ b/fpga/usrp2/control_lib/wb_regfile_2clock.v
@@ -0,0 +1,107 @@
+
+module wb_regfile_2clock
+  (input wb_clk_i,
+   input wb_rst_i,
+   input wb_stb_i,
+   input wb_we_i,
+   input [15:0] wb_adr_i,
+   input [3:0] wb_sel_i,
+   input [31:0] wb_dat_i,
+   output [31:0] wb_dat_o,
+   output wb_ack_o,
+   input alt_clk,
+   input alt_rst,
+   
+   output reg [31:0] reg00,
+   output reg [31:0] reg01,
+   output reg [31:0] reg02,
+   output reg [31:0] reg03,
+   output reg [31:0] reg04,
+   output reg [31:0] reg05,
+   output reg [31:0] reg06,
+   output reg [31:0] reg07
+   );
+
+   reg [15:0] 	 addr_reg;
+   reg [3:0] 	 sel_reg;
+   reg [31:0] 	 dat_reg;
+   reg 		 wr_ret1, wr_ret2, we_reg, stb_reg;
+   
+   always @(posedge wb_clk_i)
+     if(wb_rst_i)
+       begin
+	  addr_reg <= 0;
+	  sel_reg <= 0;
+	  dat_reg <= 0;
+       end
+     else if(wb_stb_i & wb_we_i)
+       begin
+	  addr_reg <= wb_adr_i;
+	  sel_reg <= wb_sel_i;
+	  dat_reg <= wb_dat_i;
+       end
+   
+   always @(posedge wb_clk_i)
+     if(wb_rst_i)
+       {we_reg,stb_reg} <= 2'b0;
+     else
+       {we_reg,stb_reg} <= {wb_we_i,wb_stb_i};
+
+   assign wb_ack_o = stb_reg;
+   
+   always @(posedge alt_clk)
+     if(alt_rst)
+       {wr_ret2, wr_ret1} <= 2'b0;
+     else
+       {wr_ret2, wr_ret1} <= {wr_ret1, we_reg & stb_reg};
+   
+   always @(posedge alt_clk)
+     if(alt_rst)
+       begin
+	  reg00 <= 0;
+	  reg01 <= 0;
+	  reg02 <= 0;
+	  reg03 <= 0;
+	  reg04 <= 0;
+	  reg05 <= 0;
+	  reg06 <= 0;
+	  reg07 <= 0;
+       end // if (alt_rst)
+     else if(wr_ret2)
+       case(addr_reg[4:2])
+	 3'd0: reg00 <= { {sel_reg[3] ? dat_reg[31:24] : reg00[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg00[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg00[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg00[7:0]}};
+	 3'd1: reg01 <= { {sel_reg[3] ? dat_reg[31:24] : reg01[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg01[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg01[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg01[7:0]}};
+	 3'd2: reg02 <= { {sel_reg[3] ? dat_reg[31:24] : reg02[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg02[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg02[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg02[7:0]}};
+	 3'd3: reg03 <= { {sel_reg[3] ? dat_reg[31:24] : reg03[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg03[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg03[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg03[7:0]}};
+	 3'd4: reg04 <= { {sel_reg[3] ? dat_reg[31:24] : reg04[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg04[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg04[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg04[7:0]}};
+	 3'd5: reg05 <= { {sel_reg[3] ? dat_reg[31:24] : reg05[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg05[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg05[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg05[7:0]}};
+	 3'd6: reg06 <= { {sel_reg[3] ? dat_reg[31:24] : reg06[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg06[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg06[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg06[7:0]}};
+	 3'd7: reg07 <= { {sel_reg[3] ? dat_reg[31:24] : reg07[31:24]},
+			  {sel_reg[2] ? dat_reg[23:16] : reg07[23:16]},
+			  {sel_reg[1] ? dat_reg[15:8] : reg07[15:8]},
+			  {sel_reg[0] ? dat_reg[7:0] : reg07[7:0]}};
+       endcase // case(addr_reg[2:0])
+   
+endmodule // wb_regfile_2clock
+