diff options
Diffstat (limited to 'usrp/fpga/sdr_lib/atr_delay.v')
-rw-r--r-- | usrp/fpga/sdr_lib/atr_delay.v | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/usrp/fpga/sdr_lib/atr_delay.v b/usrp/fpga/sdr_lib/atr_delay.v deleted file mode 100644 index bbba9e291..000000000 --- a/usrp/fpga/sdr_lib/atr_delay.v +++ /dev/null @@ -1,83 +0,0 @@ -// -*- verilog -*- -// -// USRP - Universal Software Radio Peripheral -// -// Copyright (C) 2007 Corgan Enterprises 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 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 -// - -module atr_delay(clk_i,rst_i,ena_i,tx_empty_i,tx_delay_i,rx_delay_i,atr_tx_o); - input clk_i; - input rst_i; - input ena_i; - input tx_empty_i; - input [11:0] tx_delay_i; - input [11:0] rx_delay_i; - output atr_tx_o; - - reg [3:0] state; - reg [11:0] count; - - `define ST_RX_DELAY 4'b0001 - `define ST_RX 4'b0010 - `define ST_TX_DELAY 4'b0100 - `define ST_TX 4'b1000 - - always @(posedge clk_i) - if (rst_i | ~ena_i) - begin - state <= `ST_RX; - count <= 12'b0; - end - else - case (state) - `ST_RX: - if (!tx_empty_i) - begin - state <= `ST_TX_DELAY; - count <= tx_delay_i; - end - - `ST_TX_DELAY: - if (count == 0) - state <= `ST_TX; - else - count <= count - 1; - - `ST_TX: - if (tx_empty_i) - begin - state <= `ST_RX_DELAY; - count <= rx_delay_i; - end - - `ST_RX_DELAY: - if (count == 0) - state <= `ST_RX; - else - count <= count - 1; - - default: // Error - begin - state <= `ST_RX; - count <= 0; - end - endcase - - assign atr_tx_o = (state == `ST_TX) | (state == `ST_RX_DELAY); - -endmodule // atr_delay - |