[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Commit-gnuradio] r9635 - gnuradio/trunk/usrp2/fpga/control_lib
From: |
matt |
Subject: |
[Commit-gnuradio] r9635 - gnuradio/trunk/usrp2/fpga/control_lib |
Date: |
Sun, 21 Sep 2008 11:57:02 -0600 (MDT) |
Author: matt
Date: 2008-09-21 11:57:02 -0600 (Sun, 21 Sep 2008)
New Revision: 9635
Added:
gnuradio/trunk/usrp2/fpga/control_lib/wb_bridge_16_32.v
Log:
attach a 16 bit device to the bus and make it look like a 32 bit device
Added: gnuradio/trunk/usrp2/fpga/control_lib/wb_bridge_16_32.v
===================================================================
--- gnuradio/trunk/usrp2/fpga/control_lib/wb_bridge_16_32.v
(rev 0)
+++ gnuradio/trunk/usrp2/fpga/control_lib/wb_bridge_16_32.v 2008-09-21
17:57:02 UTC (rev 9635)
@@ -0,0 +1,36 @@
+
+
+module wb_bridge_16_32
+ #(parameter AWIDTH=16)
+ (input wb_clk, input wb_rst,
+ input A_cyc_i, input A_stb_i, input A_we_i, input [3:0] A_sel_i,
+ input [AWIDTH-1:0] A_adr_i, input [31:0] A_dat_i, output [31:0] A_dat_o,
output A_ack_o,
+ output B_cyc_o, output B_stb_o, output B_we_o, output [1:0] B_sel_o,
+ output [AWIDTH-1:0] B_adr_o, output [15:0] B_dat_o, input [15:0] B_dat_i,
input B_ack_i
+ );
+
+ reg [15:0] holding;
+ reg phase;
+
+ assign B_adr_o = {A_adr_i[AWIDTH-1:2],phase,1'b0};
+ assign B_cyc_o = A_cyc_i;
+ assign B_stb_o = A_stb_i;
+ assign B_we_o = A_we_i;
+
+ assign B_dat_o = ~phase ? A_dat_i[15:0] : A_dat_i[31:16];
+ assign B_sel_o = ~phase ? A_sel_i[1:0] : A_sel_i[3:2];
+
+ assign A_dat_o = {B_dat_i,holding};
+ assign A_ack_o = phase & B_ack_i;
+
+ always @(posedge wb_clk)
+ if(wb_rst)
+ phase <= 0;
+ else if(B_ack_i)
+ phase <= ~phase;
+
+ always @(posedge wb_clk)
+ if(~phase & B_ack_i)
+ holding <= B_dat_i;
+
+endmodule // wb_bridge_16_32
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Commit-gnuradio] r9635 - gnuradio/trunk/usrp2/fpga/control_lib,
matt <=