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, 16 insertions, 0 deletions

diff --git a/usrp2/fpga/control_lib/mux4.v b/usrp2/fpga/control_lib/mux4.v
new file mode 100644
index 000000000..31c85c832
--- /dev/null
+++ b/usrp2/fpga/control_lib/mux4.v
@@ -0,0 +1,16 @@
+
+
+module mux4
+  #(parameter WIDTH=32, parameter DISABLED=0)
+    (input en,
+     input [1:0] sel,
+     input [WIDTH-1:0] i0,
+     input [WIDTH-1:0] i1,
+     input [WIDTH-1:0] i2,
+     input [WIDTH-1:0] i3,
+     output [WIDTH-1:0] o);
+
+   assign 		o = en ? (sel[1] ? (sel[0] ? i3 : i2) : (sel[0] ? i1 : i0)) :
+			DISABLED;
+   
+endmodule // mux4