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Diffstat (limited to 'usrp/fpga/sdr_lib/serial_io.v')
| -rw-r--r-- | usrp/fpga/sdr_lib/serial_io.v | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/usrp/fpga/sdr_lib/serial_io.v b/usrp/fpga/sdr_lib/serial_io.v deleted file mode 100644 index 62f92bed2..000000000 --- a/usrp/fpga/sdr_lib/serial_io.v +++ /dev/null @@ -1,118 +0,0 @@ -// -*- verilog -*- -// -// USRP - Universal Software Radio Peripheral -// -// Copyright (C) 2003,2004 Matt Ettus -// -// 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 2 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, write to the Free Software -// Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA -// - - - -// Serial Control Bus from Cypress chip - -module serial_io - ( input master_clk, - input serial_clock, - input serial_data_in, - input enable, - input reset, - inout wire serial_data_out, - output reg [6:0] serial_addr, - output reg [31:0] serial_data, - output wire serial_strobe, - input wire [31:0] readback_0, - input wire [31:0] readback_1, - input wire [31:0] readback_2, - input wire [31:0] readback_3, - input wire [31:0] readback_4, - input wire [31:0] readback_5, - input wire [31:0] readback_6, - input wire [31:0] readback_7 - ); - - reg is_read; - reg [7:0] ser_ctr; - reg write_done; - - assign serial_data_out = is_read ? serial_data[31] : 1'bz; - - always @(posedge serial_clock, posedge reset, negedge enable) - if(reset) - ser_ctr <= #1 8'd0; - else if(~enable) - ser_ctr <= #1 8'd0; - else if(ser_ctr == 39) - ser_ctr <= #1 8'd0; - else - ser_ctr <= #1 ser_ctr + 8'd1; - - always @(posedge serial_clock, posedge reset, negedge enable) - if(reset) - is_read <= #1 1'b0; - else if(~enable) - is_read <= #1 1'b0; - else if((ser_ctr == 7)&&(serial_addr[6]==1)) - is_read <= #1 1'b1; - - always @(posedge serial_clock, posedge reset) - if(reset) - begin - serial_addr <= #1 7'b0; - serial_data <= #1 32'b0; - write_done <= #1 1'b0; - end - else if(~enable) - begin - //serial_addr <= #1 7'b0; - //serial_data <= #1 32'b0; - write_done <= #1 1'b0; - end - else - begin - if(~is_read && (ser_ctr == 39)) - write_done <= #1 1'b1; - else - write_done <= #1 1'b0; - if(is_read & (ser_ctr==8)) - case (serial_addr) - 7'd1: serial_data <= #1 readback_0; - 7'd2: serial_data <= #1 readback_1; - 7'd3: serial_data <= #1 readback_2; - 7'd4: serial_data <= #1 readback_3; - 7'd5: serial_data <= #1 readback_4; - 7'd6: serial_data <= #1 readback_5; - 7'd7: serial_data <= #1 readback_6; - 7'd8: serial_data <= #1 readback_7; - default: serial_data <= #1 32'd0; - endcase // case(serial_addr) - else if(ser_ctr >= 8) - serial_data <= #1 {serial_data[30:0],serial_data_in}; - else if(ser_ctr < 8) - serial_addr <= #1 {serial_addr[5:0],serial_data_in}; - end // else: !if(~enable) - - reg enable_d1, enable_d2; - always @(posedge master_clk) - begin - enable_d1 <= #1 enable; - enable_d2 <= #1 enable_d1; - end - - assign serial_strobe = enable_d2 & ~enable_d1; - -endmodule // serial_io - - |