Merged r9433:9527 from features/gr-usrp2 into trunk. Adds usrp2 and gr-usrp2 top-level components. Trunk passes distcheck with mb-gcc installed, but currently not without them. The key issue is that when mb-gcc is not installed, the build system skips over the usrp2/firmware directory, and the firmware include files don't get put into the dist tarball. But we can't do the usual DIST_SUBDIRS method as the firmware is a subpackage.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9528 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 36 insertions, 0 deletions

diff --git a/control_lib/wb_ram_block.v b/control_lib/wb_ram_block.v
new file mode 100644
index 000000000..044d34ca4
--- /dev/null
+++ b/control_lib/wb_ram_block.v
@@ -0,0 +1,36 @@
+
+
+// Since this is a block ram, there are no byte-selects and there is a 1-cycle read latency
+//   These have to be a multiple of 512 lines (2K) long
+
+module wb_ram_block
+  #(parameter AWIDTH=9)
+    (input clk_i,
+     input stb_i,
+     input we_i,
+     input [AWIDTH-1:0] adr_i,
+     input [31:0] dat_i,
+     output reg [31:0] dat_o,
+     output ack_o);
+
+   reg [31:0] distram [0:1<<(AWIDTH-1)];
+
+   always @(posedge clk_i)
+     begin
+	if(stb_i & we_i)
+	  distram[adr_i] <= dat_i;
+	dat_o <= distram[adr_i];
+     end
+
+   reg stb_d1, ack_d1;
+   always @(posedge clk_i)
+     stb_d1 <= stb_i;
+   
+   always @(posedge clk_i)
+     ack_d1 <= ack_o;
+   
+   assign ack_o = stb_i & (we_i | (stb_d1 & ~ack_d1));
+endmodule // wb_ram_block
+
+
+