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, 28 insertions, 0 deletions

diff --git a/usrp2/fpga/control_lib/fifo_reader.v b/usrp2/fpga/control_lib/fifo_reader.v
new file mode 100644
index 000000000..49d05b1a6
--- /dev/null
+++ b/usrp2/fpga/control_lib/fifo_reader.v
@@ -0,0 +1,28 @@
+
+module fifo_reader
+  #(parameter rate=4)
+    (input clk,
+     input [31:0] data_in,
+     output read_o
+     input ready_i,
+     input done_i
+     );
+
+   reg [7:0] state = 0;
+   
+   always @(posedge clk)
+     if(ready)
+       if(state == rate)
+	 state <= 0;
+       else
+	 state <= state + 1;
+     else
+       state <= 0;
+
+   assign    read = (state == rate);
+
+   initial $monitor(data_in);
+   
+endmodule // fifo_reader
+
+