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//
// 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/>.
//
`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
module B100
(input CLK_FPGA_P, input CLK_FPGA_N, // Diff
output [2:0] debug_led, output [31:0] debug, output [1:0] debug_clk,
// GPIF
inout [15:0] GPIF_D, input [3:0] GPIF_CTL, output GPIF_SLOE,
output [1:0] GPIF_ADR, output GPIF_SLWR, output GPIF_SLRD, output GPIF_PKTEND,
input IFCLK,
inout SDA_FPGA, inout SCL_FPGA, // I2C
output SCLK_TX_DB, output SEN_TX_DB, output MOSI_TX_DB, input MISO_TX_DB, // DB TX SPI
output SCLK_RX_DB, output SEN_RX_DB, output MOSI_RX_DB, input MISO_RX_DB, // DB TX SPI
output SCLK_CODEC, output SEN_CODEC, output MOSI_CODEC, input MISO_CODEC, // AD9862 main SPI
input cgen_st_status, input cgen_st_ld, input cgen_st_refmon, output cgen_sync_b, output cgen_ref_sel,
inout [15:0] io_tx, inout [15:0] io_rx,
output [13:0] dac, output TXSYNC, output TXBLANK,
input [11:0] adc, input RXSYNC,
input PPS_IN,
input reset_n, output reset_codec
);
assign reset_codec = 1; // Believed to be active low
// /////////////////////////////////////////////////////////////////////////
// Clocking
wire clk_fpga, clk_fpga_in, reset;
IBUFGDS #(.IOSTANDARD("LVDS_33"), .DIFF_TERM("TRUE"))
clk_fpga_pin (.O(clk_fpga_in),.I(CLK_FPGA_P),.IB(CLK_FPGA_N));
BUFG clk_fpga_BUFG (.I(clk_fpga_in), .O(clk_fpga));
reset_sync reset_sync(.clk(clk_fpga), .reset_in(~reset_n), .reset_out(reset));
// /////////////////////////////////////////////////////////////////////////
// SPI
wire mosi, sclk, miso;
assign { SCLK_TX_DB, MOSI_TX_DB } = ~SEN_TX_DB ? {sclk,mosi} : 2'b0;
assign { SCLK_RX_DB, MOSI_RX_DB } = ~SEN_RX_DB ? {sclk,mosi} : 2'b0;
assign { SCLK_CODEC, MOSI_CODEC } = ~SEN_CODEC ? {sclk,mosi} : 2'b0;
assign miso = (~SEN_TX_DB & MISO_TX_DB) | (~SEN_RX_DB & MISO_RX_DB) |
(~SEN_CODEC & MISO_CODEC);
// /////////////////////////////////////////////////////////////////////////
// TX DAC -- handle the interleaved data bus to DAC, with clock doubling DLL
assign TXBLANK = 0;
wire [13:0] tx_i, tx_q;
genvar i;
generate
for(i=0;i<14;i=i+1)
begin : gen_dacout
ODDR2 #(.DDR_ALIGNMENT("NONE"), // Sets output alignment to "NONE", "C0" or "C1"
.INIT(1'b0), // Sets initial state of the Q output to 1'b0 or 1'b1
.SRTYPE("SYNC")) // Specifies "SYNC" or "ASYNC" set/reset
ODDR2_inst (.Q(dac[i]), // 1-bit DDR output data
.C0(clk_fpga), // 1-bit clock input
.C1(~clk_fpga), // 1-bit clock input
.CE(1'b1), // 1-bit clock enable input
.D0(tx_i[i]), // 1-bit data input (associated with C0)
.D1(tx_q[i]), // 1-bit data input (associated with C1)
.R(1'b0), // 1-bit reset input
.S(1'b0)); // 1-bit set input
end // block: gen_dacout
endgenerate
ODDR2 #(.DDR_ALIGNMENT("NONE"), // Sets output alignment to "NONE", "C0" or "C1"
.INIT(1'b0), // Sets initial state of the Q output to 1'b0 or 1'b1
.SRTYPE("SYNC")) // Specifies "SYNC" or "ASYNC" set/reset
ODDR2_txsnc (.Q(TXSYNC), // 1-bit DDR output data
.C0(clk_fpga), // 1-bit clock input
.C1(~clk_fpga), // 1-bit clock input
.CE(1'b1), // 1-bit clock enable input
.D0(1'b0), // 1-bit data input (associated with C0)
.D1(1'b1), // 1-bit data input (associated with C1)
.R(1'b0), // 1-bit reset input
.S(1'b0)); // 1-bit set input
// /////////////////////////////////////////////////////////////////////////
// RX ADC -- handles deinterleaving
reg [11:0] rx_i, rx_q;
wire [11:0] rx_a, rx_b;
genvar j;
generate
for(j=0;j<12;j=j+1)
begin : gen_adcin
IDDR2 #(.DDR_ALIGNMENT("NONE"), // Sets output alignment to "NONE", "C0" or "C1"
.INIT_Q0(1'b0), // Sets initial state of the Q0 output to 1’b0 or 1’b1
.INIT_Q1(1'b0), // Sets initial state of the Q1 output to 1’b0 or 1’b1
.SRTYPE("SYNC")) // Specifies "SYNC" or "ASYNC" set/reset
IDDR2_inst (.Q0(rx_a[j]), // 1-bit output captured with C0 clock
.Q1(rx_b[j]), // 1-bit output captured with C1 clock
.C0(clk_fpga), // 1-bit clock input
.C1(~clk_fpga), // 1-bit clock input
.CE(1'b1), // 1-bit clock enable input
.D(adc[j]), // 1-bit DDR data input
.R(1'b0), // 1-bit reset input
.S(1'b0)); // 1-bit set input
end // block: gen_adcin
endgenerate
IDDR2 #(.DDR_ALIGNMENT("NONE"), // Sets output alignment to "NONE", "C0" or "C1"
.INIT_Q0(1'b0), // Sets initial state of the Q0 output to 1’b0 or 1’b1
.INIT_Q1(1'b0), // Sets initial state of the Q1 output to 1’b0 or 1’b1
.SRTYPE("SYNC")) // Specifies "SYNC" or "ASYNC" set/reset
IDDR2_sync (.Q0(rxsync_0), // 1-bit output captured with C0 clock
.Q1(rxsync_1), // 1-bit output captured with C1 clock
.C0(clk_fpga), // 1-bit clock input
.C1(~clk_fpga), // 1-bit clock input
.CE(1'b1), // 1-bit clock enable input
.D(RXSYNC), // 1-bit DDR data input
.R(1'b0), // 1-bit reset input
.S(1'b0)); // 1-bit set input
always @(posedge clk_fpga)
if(rxsync_0)
begin
rx_i <= rx_b;
rx_q <= rx_a;
end
else
begin
rx_i <= rx_a;
rx_q <= rx_b;
end
// /////////////////////////////////////////////////////////////////////////
// Main U1E Core
u1plus_core u1p_c(.clk_fpga(clk_fpga), .rst_fpga(reset),
.debug_led(debug_led), .debug(debug), .debug_clk(debug_clk),
.debug_txd(), .debug_rxd(1'b1),
.gpif_d(GPIF_D), .gpif_ctl(GPIF_CTL), .gpif_pktend(GPIF_PKTEND),
.gpif_sloe(GPIF_SLOE), .gpif_slwr(GPIF_SLWR), .gpif_slrd(GPIF_SLRD),
.gpif_fifoadr(GPIF_ADR), .gpif_clk(IFCLK),
.db_sda(SDA_FPGA), .db_scl(SCL_FPGA),
.sclk(sclk), .sen({SEN_CODEC,SEN_TX_DB,SEN_RX_DB}), .mosi(mosi), .miso(miso),
.cgen_st_status(cgen_st_status), .cgen_st_ld(cgen_st_ld),.cgen_st_refmon(cgen_st_refmon),
.cgen_sync_b(cgen_sync_b), .cgen_ref_sel(cgen_ref_sel),
.io_tx(io_tx), .io_rx(io_rx),
.tx_i(tx_i), .tx_q(tx_q),
.rx_i(rx_i), .rx_q(rx_q),
.pps_in(PPS_IN) );
endmodule // B100
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