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

1 files changed, 46 insertions, 0 deletions

diff --git a/fpga/usrp3/lib/wishbone/settings_bus.v b/fpga/usrp3/lib/wishbone/settings_bus.v
new file mode 100644
index 000000000..39f148916
--- /dev/null
+++ b/fpga/usrp3/lib/wishbone/settings_bus.v
@@ -0,0 +1,46 @@
+//
+// Copyright 2011-2012 Ettus Research LLC
+//
+
+
+
+// Grab settings off the wishbone bus, send them out to our simpler bus on the fast clock
+
+module settings_bus
+  #(parameter AWIDTH=16, parameter DWIDTH=32, parameter SWIDTH=8)
+    (input wb_clk, 
+     input wb_rst, 
+     input [AWIDTH-1:0] wb_adr_i,
+     input [DWIDTH-1:0] wb_dat_i,
+     input wb_stb_i,
+     input wb_we_i,
+     output reg wb_ack_o,
+     output reg strobe,
+     output reg [SWIDTH-1:0] addr,
+     output reg [31:0] data);
+
+   reg 	    stb_int, stb_int_d1;
+   
+   always @(posedge wb_clk)
+     if(wb_rst)
+       begin
+	  strobe <= 1'b0;
+	  addr <= {SWIDTH{1'b0}};
+	  data <= 32'd0;
+       end
+     else if(wb_we_i & wb_stb_i & ~wb_ack_o)
+       begin
+	  strobe <= 1'b1;
+	  addr <= wb_adr_i[SWIDTH+1:2];
+	  data <= wb_dat_i;
+       end
+     else
+       strobe <= 1'b0;
+
+   always @(posedge wb_clk)
+     if(wb_rst)
+       wb_ack_o <= 0;
+     else
+       wb_ack_o <= wb_stb_i & ~wb_ack_o;
+
+endmodule // settings_bus