From 9e04f8e3bfe584f87c4e4f5cc40781ae6a217f00 Mon Sep 17 00:00:00 2001 From: jcorgan Date: Mon, 16 Apr 2007 21:30:13 +0000 Subject: Adds capability to independently delay the Auto T/R switching signal by a configurable number of clock ticks, to allow users to precisely align their T/R output with the pipeline delays in the transmitter. There are two new registers: FR_ATR_TX_DELAY (7'd2) FR_ATR_RX_DELAY (7'd3) ...and the corresponding db_base.py methods to set them: db_base.set_atr_tx_delay(clock_ticks) db_base.set_atr_rx_delay(clock_ticks) These methods are inherited by all the daughterboard objects so you can call them from your scripts as: subdev.set_atr_tx_delay(...) ...where 'subdev' represents the daughtercard object you're working with. The FPGA synthesis for the 2 RXHB, 2 TX case expands from 95% to 96%, with no additional synthesis messages or impact on timing. git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@5022 221aa14e-8319-0410-a670-987f0aec2ac5 --- usrp/fpga/sdr_lib/master_control.v | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'usrp/fpga/sdr_lib/master_control.v') diff --git a/usrp/fpga/sdr_lib/master_control.v b/usrp/fpga/sdr_lib/master_control.v index 863d44a82..6befc4dfd 100644 --- a/usrp/fpga/sdr_lib/master_control.v +++ b/usrp/fpga/sdr_lib/master_control.v @@ -3,6 +3,7 @@ // USRP - Universal Software Radio Peripheral // // Copyright (C) 2003,2005 Matt Ettus +// 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 @@ -111,8 +112,9 @@ module master_control <= #1 (io_3_reg & ~serial_data[31:16]) | (serial_data[15:0] & serial_data[31:16] ); endcase // case(serial_addr) - wire transmit_now = !tx_empty & enable_tx; + wire transmit_now; wire atr_ctl; + wire [31:0] atr_tx_delay, atr_rx_delay; wire [15:0] atr_mask_0, atr_txval_0, atr_rxval_0, atr_mask_1, atr_txval_1, atr_rxval_1, atr_mask_2, atr_txval_2, atr_rxval_2, atr_mask_3, atr_txval_3, atr_rxval_3; setting_reg #(`FR_ATR_MASK_0) sr_atr_mask_0(.clock(master_clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(atr_mask_0)); @@ -132,8 +134,14 @@ module master_control setting_reg #(`FR_ATR_RXVAL_3) sr_atr_rxval_3(.clock(master_clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(atr_rxval_3)); //setting_reg #(`FR_ATR_CTL) sr_atr_ctl(.clock(master_clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(atr_ctl)); + setting_reg #(`FR_ATR_TX_DELAY) sr_atr_tx_delay(.clock(master_clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(atr_tx_delay)); + setting_reg #(`FR_ATR_RX_DELAY) sr_atr_rx_delay(.clock(master_clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(atr_rx_delay)); + assign atr_ctl = 1'b1; + atr_delay atr_delay(.clk_i(master_clk),.rst_i(tx_dsp_reset),.ena_i(atr_ctl & enable_tx),.tx_empty_i(tx_empty), + .tx_delay_i(atr_tx_delay),.rx_delay_i(atr_rx_delay),.atr_tx_o(transmit_now)); + wire [15:0] atr_selected_0 = transmit_now ? atr_txval_0 : atr_rxval_0; wire [15:0] io_0 = ({{16{atr_ctl}}} & atr_mask_0 & atr_selected_0) | (~({{16{atr_ctl}}} & atr_mask_0) & io_0_reg); -- cgit