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authorjcorgan2008-09-08 01:00:12 +0000
committerjcorgan2008-09-08 01:00:12 +0000
commite0fcbaee124d3e8c4c11bdda662f88e082352058 (patch)
treea51ef1c8b949681f45e5664478e8515065cfff5b /usrp2/fpga/control_lib/settings_bus.v
parentc86f6c23c6883f73d953d64c28ab42cedb77e4d7 (diff)
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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
Diffstat (limited to 'usrp2/fpga/control_lib/settings_bus.v')
-rw-r--r--usrp2/fpga/control_lib/settings_bus.v49
1 files changed, 49 insertions, 0 deletions
diff --git a/usrp2/fpga/control_lib/settings_bus.v b/usrp2/fpga/control_lib/settings_bus.v
new file mode 100644
index 000000000..d01a30ab4
--- /dev/null
+++ b/usrp2/fpga/control_lib/settings_bus.v
@@ -0,0 +1,49 @@
+
+// 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)
+ (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,
+ input sys_clk,
+ output strobe,
+ output reg [7:0] addr,
+ output reg [31:0] data);
+
+ reg stb_int, stb_int_d1;
+
+ always @(posedge wb_clk)
+ if(wb_rst)
+ begin
+ stb_int <= 1'b0;
+ addr <= 8'd0;
+ data <= 32'd0;
+ end
+ else if(wb_we_i & wb_stb_i)
+ begin
+ stb_int <= 1'b1;
+ addr <= wb_adr_i[9:2];
+ data <= wb_dat_i;
+ end
+ else
+ stb_int <= 1'b0;
+
+ always @(posedge wb_clk)
+ if(wb_rst)
+ wb_ack_o <= 0;
+ else
+ wb_ack_o <= wb_stb_i & ~wb_ack_o;
+
+ always @(posedge wb_clk)
+ stb_int_d1 <= stb_int;
+
+ //assign strobe = stb_int & ~stb_int_d1;
+ assign strobe = stb_int & wb_ack_o;
+
+endmodule // settings_bus
+