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Diffstat (limited to 'fpga/usrp2/gpmc/gpmc_wb.v')
-rw-r--r-- | fpga/usrp2/gpmc/gpmc_wb.v | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/fpga/usrp2/gpmc/gpmc_wb.v b/fpga/usrp2/gpmc/gpmc_wb.v deleted file mode 100644 index 4d368ca94..000000000 --- a/fpga/usrp2/gpmc/gpmc_wb.v +++ /dev/null @@ -1,79 +0,0 @@ -// -// Copyright 2011 Ettus Research LLC -// -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. -// -// You should have received a copy of the GNU General Public License -// along with this program. If not, see <http://www.gnu.org/licenses/>. -// - - - -module gpmc_wb - (input EM_CLK, input [15:0] EM_D_in, output [15:0] EM_D_out, input [10:1] EM_A, input [1:0] EM_NBE, - input EM_WE, input EM_OE, - - input wb_clk, input wb_rst, - output reg [10:0] wb_adr_o, output reg [15:0] wb_dat_mosi, input [15:0] wb_dat_miso, - output reg [1:0] wb_sel_o, output wb_cyc_o, output reg wb_stb_o, output reg wb_we_o, input wb_ack_i); - - // //////////////////////////////////////////// - // Control Path, Wishbone bus bridge (wb master) - reg [1:0] we_del, oe_del; - - // Synchronize the async control signals - always @(posedge wb_clk) - if (wb_rst) begin - we_del <= 2'b0; - oe_del <= 2'b0; - end - else begin - we_del <= { we_del[0], EM_WE }; - oe_del <= { oe_del[0], EM_OE }; - end - - wire writing = we_del == 2'b01; - wire reading = oe_del == 2'b01; - - always @(posedge wb_clk) - if(writing || reading) - wb_adr_o <= { EM_A, 1'b0 }; - - always @(posedge wb_clk) - if(writing) - begin - wb_dat_mosi <= EM_D_in; - wb_sel_o <= ~EM_NBE; - end - - reg [15:0] EM_D_hold; - - always @(posedge wb_clk) - if(wb_ack_i) - EM_D_hold <= wb_dat_miso; - - assign EM_D_out = wb_ack_i ? wb_dat_miso : EM_D_hold; - - assign wb_cyc_o = wb_stb_o; - - always @(posedge wb_clk) - if(writing) - wb_we_o <= 1; - else if(wb_ack_i) // Turn off we when done. Could also use we_del[0], others... - wb_we_o <= 0; - - always @(posedge wb_clk) - if(writing || reading) - wb_stb_o <= 1; - else if(wb_ack_i) - wb_stb_o <= 0; - -endmodule // gpmc_wb |