diff options
Diffstat (limited to 'fpga/usrp2/control_lib/settings_bus.v')
-rw-r--r-- | fpga/usrp2/control_lib/settings_bus.v | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/fpga/usrp2/control_lib/settings_bus.v b/fpga/usrp2/control_lib/settings_bus.v new file mode 100644 index 000000000..aec179516 --- /dev/null +++ b/fpga/usrp2/control_lib/settings_bus.v @@ -0,0 +1,41 @@ + +// 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, + output reg 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 + strobe <= 1'b0; + addr <= 8'd0; + data <= 32'd0; + end + else if(wb_we_i & wb_stb_i & ~wb_ack_o) + begin + strobe <= 1'b1; + addr <= wb_adr_i[9:2]; + data <= wb_dat_i; + end + else + strobe <= 1'b0; + + always @(posedge wb_clk) + if(wb_rst) + wb_ack_o <= 0; + else + wb_ack_o <= wb_stb_i & ~wb_ack_o; + +endmodule // settings_bus |