// // Copyright 2013 Ettus Research LLC // Copyright 2018 Ettus Research, a National Instruments Company // // SPDX-License-Identifier: LGPL-3.0-or-later // // radio top level module for b200 // Contains all clock-rate DSP components, all radio and hardware controls and settings module radio_legacy #( parameter RADIO_FIFO_SIZE = 13, parameter SAMPLE_FIFO_SIZE = 11, parameter FP_GPIO = 0, parameter NEW_HB_INTERP = 0, parameter NEW_HB_DECIM = 0, parameter SOURCE_FLOW_CONTROL = 0, parameter USER_SETTINGS = 0, parameter DEVICE = "SPARTAN6" ) (input radio_clk, input radio_rst, input [31:0] rx, output reg [31:0] tx, input [31:0] fe_gpio_in, output [31:0] fe_gpio_out, output [31:0] fe_gpio_ddr, input [9:0] fp_gpio_in, output [9:0] fp_gpio_out, output [9:0] fp_gpio_ddr, input pps, input time_sync, input bus_clk, input bus_rst, input [63:0] tx_tdata, input tx_tlast, input tx_tvalid, output tx_tready, output [63:0] rx_tdata, output rx_tlast, output rx_tvalid, input rx_tready, input [63:0] ctrl_tdata, input ctrl_tlast, input ctrl_tvalid, output ctrl_tready, output [63:0] resp_tdata, output resp_tlast, output resp_tvalid, input resp_tready, output reg [63:0] vita_time_b, output [63:0] debug ); // /////////////////////////////////////////////////////////////////////////////// // FIFO Interfacing to the bus clk domain // in_tdata splits to tx_tdata and ctrl_tdata // rx_tdata and resp_tdata get muxed to out_tdata // Everything except rx flow control must cross in to radio_clk domain before further use // _b signifies bus_clk domain, _r signifies radio_clk domain wire [63:0] ctrl_tdata_r; wire ctrl_tready_r, ctrl_tvalid_r; wire ctrl_tlast_r; wire [63:0] resp_tdata_r; wire resp_tready_r, resp_tvalid_r; wire resp_tlast_r; wire [63:0] rx_tdata_r; wire rx_tready_r, rx_tvalid_r; wire rx_tlast_r; wire [63:0] rx_err_tdata_r; wire rx_err_tready_r, rx_err_tvalid_r; wire rx_err_tlast_r; wire [63:0] rx_prefc_tdata_r; wire rx_prefc_tready_r, rx_prefc_tvalid_r; wire rx_prefc_tlast_r; wire [63:0] rx_postfc_tdata_r; wire rx_postfc_tready_r, rx_postfc_tvalid_r; wire rx_postfc_tlast_r; wire [63:0] tx_tdata_r; wire tx_tready_r, tx_tvalid_r; wire tx_tlast_r; wire [63:0] txresp_tdata, txresp_tdata_r; wire txresp_tready, txresp_tready_r, txresp_tvalid, txresp_tvalid_r; wire txresp_tlast, txresp_tlast_r; wire [63:0] rmux_tdata_r; wire rmux_tlast_r, rmux_tvalid_r, rmux_tready_r; wire [31:0] tx_idle; wire [3:0] ibs_state; wire [63:0] rx_tdata_int; wire rx_tready_int, rx_tvalid_int; wire rx_tlast_int; axi_fifo_2clk #(.WIDTH(65), .SIZE(0/*minimal*/)) ctrl_fifo (.reset(bus_rst), .i_aclk(bus_clk), .i_tvalid(ctrl_tvalid), .i_tready(ctrl_tready), .i_tdata({ctrl_tlast, ctrl_tdata}), .o_aclk(radio_clk), .o_tvalid(ctrl_tvalid_r), .o_tready(ctrl_tready_r), .o_tdata({ctrl_tlast_r, ctrl_tdata_r})); axi_fifo_2clk #(.WIDTH(65), .SIZE(RADIO_FIFO_SIZE)) tx_fifo (.reset(bus_rst), .i_aclk(bus_clk), .i_tvalid(tx_tvalid), .i_tready(tx_tready), .i_tdata({tx_tlast, tx_tdata}), .o_aclk(radio_clk), .o_tvalid(tx_tvalid_r), .o_tready(tx_tready_r), .o_tdata({tx_tlast_r, tx_tdata_r})); axi_fifo_2clk #(.WIDTH(65), .SIZE(0/*minimal*/)) resp_fifo (.reset(radio_rst), .i_aclk(radio_clk), .i_tvalid(rmux_tvalid_r), .i_tready(rmux_tready_r), .i_tdata({rmux_tlast_r, rmux_tdata_r}), .o_aclk(bus_clk), .o_tvalid(resp_tvalid), .o_tready(resp_tready), .o_tdata({resp_tlast, resp_tdata})); axi_fifo_2clk #(.WIDTH(65), .SIZE(RADIO_FIFO_SIZE)) rx_fifo (.reset(radio_rst), .i_aclk(radio_clk), .i_tvalid(rx_tvalid_r), .i_tready(rx_tready_r), .i_tdata({rx_tlast_r, rx_tdata_r}), .o_aclk(bus_clk), .o_tvalid(rx_tvalid_int), .o_tready(rx_tready_int), .o_tdata({rx_tlast_int, rx_tdata_int})); axi_packet_gate #(.WIDTH(64), .SIZE(SAMPLE_FIFO_SIZE), .USE_AS_BUFF(0)) buffer_whole_pkt ( .clk(bus_clk), .reset(bus_rst), .clear(1'b0), .i_tdata(rx_tdata_int), .i_tlast(rx_tlast_int), .i_terror(1'b0), .i_tvalid(rx_tvalid_int), .i_tready(rx_tready_int), .o_tdata(rx_tdata), .o_tlast(rx_tlast), .o_tvalid(rx_tvalid), .o_tready(rx_tready)); /////////////////////////////////////////////////////////////////////////////////////// // Setting bus and controls wire [63:0] ctrl_tdata_proc; wire ctrl_tready_proc, ctrl_tvalid_proc; wire ctrl_tlast_proc; localparam SR_LOOPBACK = 8'd6; localparam SR_SPI = 8'd8; localparam SR_ATR = 8'd12; // thorugh 8'd18 localparam SR_TEST = 8'd21; localparam SR_CODEC_IDLE = 8'd22; localparam SR_READBACK = 8'd32; localparam SR_TX_CTRL = 8'd64; localparam SR_RX_CTRL = 8'd96; localparam SR_TIME = 8'd128; localparam SR_RX_FMT = 8'd136; localparam SR_TX_FMT = 8'd138; localparam SR_RX_DSP = 8'd144; localparam SR_TX_DSP = 8'd184; localparam SR_FP_GPIO = 8'd200; // thorugh 8'd206 localparam SR_USER_SR_BASE = 8'd253; localparam SR_USER_RB_ADDR = 8'd255; wire set_stb; wire [7:0] set_addr; wire [31:0] set_data; wire [31:0] test_readback; wire [9:0] fp_gpio_readback; wire run_rx, run_tx; wire rx_flow_ctrl_busy; reg [63:0] rb_data; wire [2:0] rb_addr; wire [63:0] vita_time, vita_time_lastpps; timekeeper_legacy #(.SR_TIME_HI(SR_TIME), .SR_TIME_LO(SR_TIME+1), .SR_TIME_CTRL(SR_TIME+2)) timekeeper (.clk(radio_clk), .reset(radio_rst), .pps(pps), .sync_in(time_sync), .strobe(1'b1), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .vita_time(vita_time), .vita_time_lastpps(vita_time_lastpps), .sync_out()); wire [31:0] debug_radio_ctrl_proc; radio_ctrl_proc radio_ctrl_proc (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .ctrl_tdata(ctrl_tdata_proc), .ctrl_tlast(ctrl_tlast_proc), .ctrl_tvalid(ctrl_tvalid_proc), .ctrl_tready(ctrl_tready_proc), .resp_tdata(resp_tdata_r), .resp_tlast(resp_tlast_r), .resp_tvalid(resp_tvalid_r), .resp_tready(resp_tready_r), .vita_time(vita_time), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .ready(1'b1), .readback(rb_data), .debug(debug_radio_ctrl_proc)); reg [63:0] rb_data_user; generate if (USER_SETTINGS == 1) begin wire set_stb_user; wire [7:0] set_addr_user; wire [31:0] set_data_user; wire [7:0] rb_addr_user; user_settings #(.BASE(SR_USER_SR_BASE)) user_settings (.clk(radio_clk), .rst(radio_rst), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .set_stb_user(set_stb_user), .set_addr_user(set_addr_user), .set_data_user(set_data_user)); setting_reg #(.my_addr(SR_USER_RB_ADDR), .awidth(8), .width(8)) user_rb_addr (.clk(radio_clk), .rst(radio_rst), .strobe(set_stb), .addr(set_addr), .in(set_data), .out(rb_addr_user), .changed()); // ---------------------------------- // Enter user settings registers here // ---------------------------------- // Example code for 32-bit settings registers and 64-bit readback registers // // To test this, modify the *_core.v file for your specific USRP and set // USER_SETTINGS=1 for the parameters for the radio_legacy instantiation. // // You can then use the get_user_settings_iface() like this: // // auto usrp = multi_usrp::make("type=b200,enable_user_regs"); // auto regs = usrp->get_user_settings_iface(0); // regs->poke32(0, 0xCAFE); // regs->poke32(4, 0xBEEF); // std::cout << boost::format("0x%016X") % regs->peek64(0) << std::endl; wire [31:0] user_reg_0_value, user_reg_1_value; setting_reg #(.my_addr(8'd0), .awidth(8), .width(32)) user_reg_0 (.clk(radio_clk), .rst(radio_rst), .strobe(set_stb_user), .addr(set_addr_user), .in(set_data_user), .out(user_reg_0_value), .changed()); setting_reg #(.my_addr(8'd1), .awidth(8), .width(32)) user_reg_1 (.clk(radio_clk), .rst(radio_rst), .strobe(set_stb_user), .addr(set_addr_user), .in(set_data_user), .out(user_reg_1_value), .changed()); always @* begin case(rb_addr_user) 8'd0 : rb_data_user <= {user_reg_1_value, user_reg_0_value}; default : rb_data_user <= 64'd0; endcase end end else begin //for USER_SETTINGS == 1 always @* rb_data_user <= 64'd0; end endgenerate always @* case(rb_addr) 3'd0 : rb_data <= { 32'b0, test_readback }; 3'd1 : rb_data <= vita_time; 3'd2 : rb_data <= vita_time_lastpps; 3'd3 : rb_data <= {tx, rx}; 3'd4 : rb_data <= {54'h0,fp_gpio_readback}; 3'd5 : rb_data <= {59'h0,rx_flow_ctrl_busy,ibs_state[3:0]}; // Monitor state of RX state machine. // 3'd6 : rb_data <= ; 3'd7 : rb_data <= rb_data_user; default : rb_data <= 64'd0; endcase // case (rb_addr) // // Sample VITA_TIME into the bus_clk domain for use by instrumentation. // wire [63:0] vita_time_b_int; wire vita_time_b_valid; axi_fifo_2clk #(.WIDTH(64), .SIZE(0)) vita_time_fifo (.reset(radio_rst), .i_aclk(radio_clk), .i_tvalid(1'b1), .i_tready(), .i_tdata(vita_time), .o_aclk(bus_clk), .o_tvalid(vita_time_b_valid), .o_tready(1'b1), .o_tdata(vita_time_b_int)); always @(posedge bus_clk) if (vita_time_b_valid) vita_time_b <= vita_time_b_int; // Set this register to loop TX data directly to RX data. setting_reg #(.my_addr(SR_LOOPBACK), .awidth(8), .width(1)) sr_loopback (.clk(radio_clk), .rst(radio_rst), .strobe(set_stb), .addr(set_addr), .in(set_data), .out(loopback), .changed()); setting_reg #(.my_addr(SR_TEST), .awidth(8), .width(32)) sr_test (.clk(radio_clk), .rst(radio_rst), .strobe(set_stb), .addr(set_addr), .in(set_data), .out(test_readback), .changed()); setting_reg #(.my_addr(SR_CODEC_IDLE), .awidth(8), .width(32)) sr_codec_idle (.clk(radio_clk), .rst(radio_rst), .strobe(set_stb), .addr(set_addr), .in(set_data), .out(tx_idle), .changed()); setting_reg #(.my_addr(SR_READBACK), .awidth(8), .width(3)) sr_rdback (.clk(radio_clk), .rst(radio_rst), .strobe(set_stb), .addr(set_addr), .in(set_data), .out(rb_addr), .changed()); //The fe_atr pins driven by this module are always configured as outputs so default //the DDR (data direction register) to be all ones (outputs) so that the drive direction //these lines does not change during/after resets. gpio_atr #(.BASE(SR_ATR), .WIDTH(32), .FAB_CTRL_EN(0), .DEFAULT_DDR(32'hFFFFFFFF), .DEFAULT_IDLE(32'h00000000)) fe_gpio_atr (.clk(radio_clk),.reset(radio_rst), .set_stb(set_stb),.set_addr(set_addr),.set_data(set_data), .rx(run_rx), .tx(run_tx), .gpio_in(fe_gpio_in), .gpio_out(fe_gpio_out), .gpio_ddr(fe_gpio_ddr), .gpio_out_fab(32'h00000000 /* no fabric control */), .gpio_sw_rb() ); generate if (FP_GPIO != 0) begin: add_fp_gpio gpio_atr #(.BASE(SR_FP_GPIO), .WIDTH(10), .FAB_CTRL_EN(0)) fp_gpio_atr (.clk(radio_clk),.reset(radio_rst), .set_stb(set_stb),.set_addr(set_addr),.set_data(set_data), .rx(run_rx), .tx(run_tx), .gpio_in(fp_gpio_in), .gpio_out(fp_gpio_out), .gpio_ddr(fp_gpio_ddr), .gpio_out_fab(10'h000 /* no fabric control */), .gpio_sw_rb(fp_gpio_readback)); end endgenerate /////////////////////////////////////////////////////////////////////////////////////// // Source flow control generate if (SOURCE_FLOW_CONTROL == 1) begin localparam SID_PREFIX_CTRL = 2'd0; localparam SID_PREFIX_FC = 2'd1; wire [63:0] ctrl_tdata_fc; wire ctrl_tready_fc, ctrl_tvalid_fc; wire ctrl_tlast_fc; wire [63:0] ctrl_hdr; wire [1:0] ctrl_dest; assign ctrl_dest = (ctrl_hdr[1:0] == SID_PREFIX_FC) ? 2'd1 : 2'd0; axi_demux4 #(.ACTIVE_CHAN(4'b0011), .WIDTH(64), .BUFFER(1)) demux_proc_fc (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .header(ctrl_hdr), .dest(ctrl_dest), .i_tdata(ctrl_tdata_r), .i_tlast(ctrl_tlast_r), .i_tvalid(ctrl_tvalid_r), .i_tready(ctrl_tready_r), //Input .o0_tdata(ctrl_tdata_proc), .o0_tlast(ctrl_tlast_proc), .o0_tvalid(ctrl_tvalid_proc), .o0_tready(ctrl_tready_proc), //Settings/Readback .o1_tdata(ctrl_tdata_fc), .o1_tlast(ctrl_tlast_fc), .o1_tvalid(ctrl_tvalid_fc), .o1_tready(ctrl_tready_fc), //Flow control .o2_tdata(), .o2_tlast(), .o2_tvalid(), .o2_tready(1'b0), //Unused .o3_tdata(), .o3_tlast(), .o3_tvalid(), .o3_tready(1'b0)); //Unused source_flow_control_legacy #(.BASE(SR_RX_CTRL+6)) rx_sfc (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .fc_tdata(ctrl_tdata_fc), .fc_tlast(ctrl_tlast_fc), .fc_tvalid(ctrl_tvalid_fc), .fc_tready(ctrl_tready_fc), //Flow control In .in_tdata(rx_prefc_tdata_r), .in_tlast(rx_prefc_tlast_r), .in_tvalid(rx_prefc_tvalid_r), .in_tready(rx_prefc_tready_r), //RX Input .out_tdata(rx_postfc_tdata_r), .out_tlast(rx_postfc_tlast_r), .out_tvalid(rx_postfc_tvalid_r), .out_tready(rx_postfc_tready_r), //RX Output .busy(rx_flow_ctrl_busy)); end else begin //for SOURCE_FLOW_CONTROL == 1 assign ctrl_tdata_proc = ctrl_tdata_r; assign ctrl_tlast_proc = ctrl_tlast_r; assign ctrl_tvalid_proc = ctrl_tvalid_r; assign ctrl_tready_r = ctrl_tready_proc; assign rx_postfc_tdata_r = rx_prefc_tdata_r; assign rx_postfc_tlast_r = rx_prefc_tlast_r; assign rx_postfc_tvalid_r = rx_prefc_tvalid_r; assign rx_prefc_tready_r = rx_postfc_tready_r; assign rx_flow_ctrl_busy = 1'b0; end endgenerate // ///////////////////////////////////////////////////////////////////////////////// // TX Chain wire [175:0] txsample_tdata; wire txsample_tvalid, txsample_tready; wire [31:0] sample_tx; wire ack_or_error, packet_consumed; wire [11:0] seqnum; wire [63:0] error_code; wire [31:0] sid; wire [23:0] tx_fe_i, tx_fe_q; wire [31:0] debug_tx_control; always @(posedge radio_clk) begin tx[31:16] <= (run_tx) ? tx_fe_i[23:8] : tx_idle[31:16]; tx[15:0] <= (run_tx) ? tx_fe_q[23:8] : tx_idle[15:0]; end wire [63:0] tx_tdata_i; wire tx_tlast_i, tx_tvalid_i, tx_tready_i; new_tx_deframer tx_deframer (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .i_tdata(tx_tdata_i), .i_tlast(tx_tlast_i), .i_tvalid(tx_tvalid_i), .i_tready(tx_tready_i), .sample_tdata(txsample_tdata), .sample_tvalid(txsample_tvalid), .sample_tready(txsample_tready), .debug()); new_tx_control #(.BASE(SR_TX_CTRL)) tx_control (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .vita_time(vita_time), .ack_or_error(ack_or_error), .packet_consumed(packet_consumed), .seqnum(seqnum), .error_code(error_code), .sid(sid), .sample_tdata(txsample_tdata), .sample_tvalid(txsample_tvalid), .sample_tready(txsample_tready), .sample(sample_tx), .run(run_tx), .strobe(strobe_tx), .debug(debug_tx_control)); tx_responder #(.BASE(SR_TX_CTRL+2)) tx_responder (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .ack_or_error(ack_or_error), .packet_consumed(packet_consumed), .seqnum(seqnum), .error_code(error_code), .sid(sid), .vita_time(vita_time), .o_tdata(txresp_tdata_r), .o_tlast(txresp_tlast_r), .o_tvalid(txresp_tvalid_r), .o_tready(txresp_tready_r)); wire [31:0] debug_duc_chain; duc_chain #(.BASE(SR_TX_DSP), .DSPNO(0), .WIDTH(24), .NEW_HB_INTERP(NEW_HB_INTERP),.DEVICE(DEVICE)) duc_chain (.clk(radio_clk), .rst(radio_rst), .clr(1'b0), .set_stb(set_stb),.set_addr(set_addr),.set_data(set_data), .tx_fe_i(tx_fe_i),.tx_fe_q(tx_fe_q), .sample(sample_tx), .run(run_tx), .strobe(strobe_tx), .debug(debug_duc_chain) ); `ifdef DELETE_FORMAT_CONVERSION assign tx_tdata_i = tx_tdata_r; assign tx_tlast_i = tx_tlast_r; assign tx_tvalid_i = tx_tvalid_r; assign tx_tready_r = tx_tready_i; `else chdr_xxxx_to_16sc_chain #(.BASE(SR_TX_FMT)) convert_xxxx_to_16sc (.clk(radio_clk), .reset(radio_rst), .set_stb(set_stb),.set_addr(set_addr),.set_data(set_data), .i_tdata(tx_tdata_r), .i_tlast(tx_tlast_r), .i_tvalid(tx_tvalid_r), .i_tready(tx_tready_r), .o_tdata(tx_tdata_i), .o_tlast(tx_tlast_i), .o_tvalid(tx_tvalid_i), .o_tready(tx_tready_i), .debug()); `endif // !`ifdef DELETE_FORMAT_CONVERSION // ///////////////////////////////////////////////////////////////////////////////// // RX Chain wire full, eob_rx; wire strobe_rx; wire [31:0] sample_rx; wire [31:0] rx_sid; wire [11:0] rx_seqnum; wire [63:0] rx_tdata_i; wire rx_tlast_i, rx_tvalid_i, rx_tready_i; reg [1:0] rx_err_delay_cnt = 2'd0; reg rx_err_gate = 0; wire [31:0] debug_rx_framer; new_rx_framer #(.BASE(SR_RX_CTRL+4),.SAMPLE_FIFO_SIZE(SAMPLE_FIFO_SIZE)) new_rx_framer (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .vita_time(vita_time), .strobe(strobe_rx), .sample(sample_rx), .run(run_rx), .eob(eob_rx), .full(full), .sid(rx_sid), .seqnum(rx_seqnum), .o_tdata(rx_tdata_i), .o_tlast(rx_tlast_i), .o_tvalid(rx_tvalid_i), .o_tready(rx_tready_i), .debug(debug_rx_framer)); wire [31:0] debug_rx_control; new_rx_control #(.BASE(SR_RX_CTRL)) new_rx_control (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data), .vita_time(vita_time), .strobe(strobe_rx), .run(run_rx), .eob(eob_rx), .full(full), .sid(rx_sid), .seqnum(rx_seqnum), .err_tdata(rx_err_tdata_r), .err_tlast(rx_err_tlast_r), .err_tvalid(rx_err_tvalid_r), .err_tready(rx_err_gate & rx_err_tready_r), .ibs_state(ibs_state), .debug(debug_rx_control)); wire [31:0] debug_ddc_chain; // Digital Loopback TX -> RX (Pipeline immediately inside rx_frontend). wire [31:0] rx_fe = loopback ? tx : rx; ddc_chain #(.BASE(SR_RX_DSP), .DSPNO(0), .WIDTH(24), .NEW_HB_DECIM(NEW_HB_DECIM), .DEVICE(DEVICE)) ddc_chain (.clk(radio_clk), .rst(radio_rst), .clr(1'b0), .set_stb(set_stb),.set_addr(set_addr),.set_data(set_data), .rx_fe_i({rx_fe[31:16],8'd0}),.rx_fe_q({rx_fe[15:0],8'd0}), .sample(sample_rx), .run(run_rx), .strobe(strobe_rx), .debug(debug_ddc_chain) ); `ifdef DELETE_FORMAT_CONVERSION assign rx_prefc_tdata_r = rx_tdata_i; assign rx_prefc_tlast_r = rx_tlast_i; assign rx_prefc_tvalid_r = rx_tvalid_i; assign rx_tready_i = rx_prefc_tready_r; `else chdr_16sc_to_xxxx_chain #(.BASE(SR_RX_FMT)) convert_16sc_to_xxxx (.clk(radio_clk), .reset(radio_rst), .set_stb(set_stb),.set_addr(set_addr),.set_data(set_data), .i_tdata(rx_tdata_i), .i_tlast(rx_tlast_i), .i_tvalid(rx_tvalid_i), .i_tready(rx_tready_i), .o_tdata(rx_prefc_tdata_r), .o_tlast(rx_prefc_tlast_r), .o_tvalid(rx_prefc_tvalid_r), .o_tready(rx_prefc_tready_r), .debug()); `endif // ///////////////////////////////////////////////////////////////////////////////// // RX Channel Muxing // The RX framer and converters can add up to 3 bubble cycles on the data path. // Delay any error packets so errors are back in band with the data packets. always @(posedge radio_clk) begin if (radio_rst) begin rx_err_delay_cnt <= 2'd0; rx_err_gate <= 0; end else begin if (rx_err_gate) begin if (rx_err_tvalid_r & rx_err_tready_r & rx_err_tlast_r) begin rx_err_delay_cnt <= 2'd0; rx_err_gate <= 0; end end else begin if (rx_postfc_tvalid_r) begin rx_err_delay_cnt <= 2'd0; end else if (rx_err_delay_cnt == 2'd3) begin rx_err_gate <= 1; end else if (rx_err_tvalid_r) begin rx_err_delay_cnt <= rx_err_delay_cnt + 2'd1; end end end end axi_mux4 #(.PRIO(1), .WIDTH(64), .BUFFER(1)) rx_mux (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .i0_tdata(rx_postfc_tdata_r), .i0_tlast(rx_postfc_tlast_r), .i0_tvalid(rx_postfc_tvalid_r), .i0_tready(rx_postfc_tready_r), .i1_tdata(rx_err_tdata_r), .i1_tlast(rx_err_gate & rx_err_tlast_r), .i1_tvalid(rx_err_gate & rx_err_tvalid_r), .i1_tready(rx_err_tready_r), .i2_tdata(64'h0), .i2_tlast(1'b0), .i2_tvalid(1'b0), .i2_tready(), .i3_tdata(64'h0), .i3_tlast(1'b0), .i3_tvalid(1'b0), .i3_tready(), .o_tdata(rx_tdata_r), .o_tlast(rx_tlast_r), .o_tvalid(rx_tvalid_r), .o_tready(rx_tready_r)); // ///////////////////////////////////////////////////////////////////////////////// // Response Channel Muxing axi_mux4 #(.PRIO(0), .WIDTH(64)) response_mux (.clk(radio_clk), .reset(radio_rst), .clear(1'b0), .i0_tdata(txresp_tdata_r), .i0_tlast(txresp_tlast_r), .i0_tvalid(txresp_tvalid_r), .i0_tready(txresp_tready_r), .i1_tdata(resp_tdata_r), .i1_tlast(resp_tlast_r), .i1_tvalid(resp_tvalid_r), .i1_tready(resp_tready_r), .i2_tdata(64'h0), .i2_tlast(1'b0), .i2_tvalid(1'b0), .i2_tready(), .i3_tdata(64'h0), .i3_tlast(1'b0), .i3_tvalid(1'b0), .i3_tready(), .o_tdata(rmux_tdata_r), .o_tlast(rmux_tlast_r), .o_tvalid(rmux_tvalid_r), .o_tready(rmux_tready_r)); /******************************************************************* * Debug only logic below here. ******************************************************************/ assign debug = 0; endmodule // radio_legacy