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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/>.
//
module u1e_core
(input clk_fpga, input rst_fpga,
output [3:0] debug_led, output [31:0] debug, output [1:0] debug_clk,
output debug_txd, input debug_rxd,
// GPMC
input EM_CLK, inout [15:0] EM_D, input [10:1] EM_A, input [1:0] EM_NBE,
input EM_WAIT0, input EM_NCS4, input EM_NCS5, input EM_NCS6,
input EM_NWE, input EM_NOE,
inout db_sda, inout db_scl,
output sclk, output [15:0] sen, output mosi, input miso,
input cgen_st_status, input cgen_st_ld, input cgen_st_refmon, output cgen_sync_b, output cgen_ref_sel,
output tx_have_space, output rx_have_data,
inout [15:0] io_tx, inout [15:0] io_rx,
output [13:0] tx_i, output [13:0] tx_q,
input [11:0] rx_i, input [11:0] rx_q,
input pps_in, output proc_int
);
localparam TXFIFOSIZE = 13;
localparam RXFIFOSIZE = 13;
// 64 total regs in address space
localparam SR_RX_CTRL0 = 0; // 9 regs (+0 to +8)
localparam SR_RX_DSP0 = 10; // 4 regs (+0 to +3)
localparam SR_RX_CTRL1 = 16; // 9 regs (+0 to +8)
localparam SR_RX_DSP1 = 26; // 4 regs (+0 to +3)
localparam SR_ERR_CTRL = 30; // 1 reg
localparam SR_TX_CTRL = 32; // 4 regs (+0 to +3)
localparam SR_TX_DSP = 38; // 3 regs (+0 to +2)
localparam SR_TIME64 = 42; // 6 regs (+0 to +5)
localparam SR_RX_FRONT = 48; // 5 regs (+0 to +4)
localparam SR_TX_FRONT = 54; // 5 regs (+0 to +4)
localparam SR_REG_TEST32 = 60; // 1 reg
localparam SR_CLEAR_RX_FIFO = 61; // 1 reg
localparam SR_CLEAR_TX_FIFO = 62; // 1 reg
localparam SR_GLOBAL_RESET = 63; // 1 reg
wire [7:0] COMPAT_NUM = 8'd5;
wire wb_clk = clk_fpga;
wire wb_rst, global_reset;
wire pps_int;
wire [63:0] vita_time, vita_time_pps;
reg [15:0] reg_leds, reg_cgen_ctrl, reg_test, xfer_rate;
wire [7:0] test_rate;
wire [3:0] test_ctrl;
wire [7:0] set_addr;
wire [31:0] set_data;
wire set_stb;
wire [31:0] debug_vt;
wire rx_overrun_dsp0, rx_overrun_dsp1, rx_overrun_gpmc, tx_underrun_dsp, tx_underrun_gpmc;
wire rx_overrun = rx_overrun_gpmc | rx_overrun_dsp0 | rx_overrun_dsp1;
wire tx_underrun = tx_underrun_gpmc | tx_underrun_dsp;
setting_reg #(.my_addr(SR_GLOBAL_RESET), .width(1)) sr_reset
(.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(),.changed(global_reset));
reset_sync reset_sync(.clk(wb_clk), .reset_in(rst_fpga | global_reset), .reset_out(wb_rst));
// /////////////////////////////////////////////////////////////////////////////////////
// GPMC Slave to Wishbone Master
localparam dw = 16;
localparam aw = 11;
localparam sw = 2;
wire [dw-1:0] m0_dat_mosi, m0_dat_miso;
wire [aw-1:0] m0_adr;
wire [sw-1:0] m0_sel;
wire m0_cyc, m0_stb, m0_we, m0_ack, m0_err, m0_rty;
wire [31:0] debug_gpmc;
wire [35:0] tx_data, rx_data, tx_err_data;
wire tx_src_rdy, tx_dst_rdy, rx_src_rdy, rx_dst_rdy,
tx_err_src_rdy, tx_err_dst_rdy;
reg [15:0] tx_frame_len;
wire [15:0] rx_frame_len;
wire bus_error;
wire clear_tx, clear_rx;
setting_reg #(.my_addr(SR_CLEAR_RX_FIFO), .width(1)) sr_clear_rx
(.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(),.changed(clear_rx));
setting_reg #(.my_addr(SR_CLEAR_TX_FIFO), .width(1)) sr_clear_tx
(.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(),.changed(clear_tx));
gpmc_async #(.TXFIFOSIZE(TXFIFOSIZE), .RXFIFOSIZE(RXFIFOSIZE))
gpmc (.arst(wb_rst),
.EM_CLK(EM_CLK), .EM_D(EM_D), .EM_A(EM_A), .EM_NBE(EM_NBE),
.EM_WAIT0(EM_WAIT0), .EM_NCS4(EM_NCS4), .EM_NCS6(EM_NCS6), .EM_NWE(EM_NWE),
.EM_NOE(EM_NOE),
.rx_have_data(rx_have_data), .tx_have_space(tx_have_space),
.bus_error(bus_error), .bus_reset(0),
.wb_clk(wb_clk), .wb_rst(wb_rst),
.wb_adr_o(m0_adr), .wb_dat_mosi(m0_dat_mosi), .wb_dat_miso(m0_dat_miso),
.wb_sel_o(m0_sel), .wb_cyc_o(m0_cyc), .wb_stb_o(m0_stb), .wb_we_o(m0_we),
.wb_ack_i(m0_ack),
.fifo_clk(wb_clk), .fifo_rst(wb_rst), .clear_tx(clear_tx), .clear_rx(clear_rx),
.tx_data_o(tx_data), .tx_src_rdy_o(tx_src_rdy), .tx_dst_rdy_i(tx_dst_rdy),
.rx_data_i(rx_data), .rx_src_rdy_i(rx_src_rdy), .rx_dst_rdy_o(rx_dst_rdy),
.tx_frame_len(tx_frame_len), .rx_frame_len(rx_frame_len),
.tx_underrun(tx_underrun_gpmc), .rx_overrun(rx_overrun_gpmc),
.test_rate(test_rate), .test_ctrl(test_ctrl),
.debug(debug_gpmc));
wire rx_src_rdy_int, rx_dst_rdy_int, tx_src_rdy_int, tx_dst_rdy_int;
wire [31:0] debug_rx_dsp, vrc_debug, vrf_debug, vr_debug;
// /////////////////////////////////////////////////////////////////////////
// RX ADC Frontend, does IQ Balance, DC Offset, muxing
wire [23:0] adc_i, adc_q; // 24 bits is total overkill here, but it matches u2/u2p
wire run_rx, run_rx0, run_rx1;
rx_frontend #(.BASE(SR_RX_FRONT)) rx_frontend
(.clk(wb_clk),.rst(wb_rst),
.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
.adc_a({rx_i,4'b00}),.adc_ovf_a(0),
.adc_b({rx_q,4'b00}),.adc_ovf_b(0),
.i_out(adc_i), .q_out(adc_q), .run(run_rx0 | run_rx1), .debug());
// /////////////////////////////////////////////////////////////////////////
// DSP RX 0
wire [31:0] sample_rx0;
wire strobe_rx0;
wire [35:0] vita_rx_data0;
wire vita_rx_src_rdy0, vita_rx_dst_rdy0;
dsp_core_rx #(.BASE(SR_RX_DSP0)) dsp_core_rx0
(.clk(wb_clk),.rst(wb_rst),
.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
.adc_i(adc_i),.adc_ovf_i(0),.adc_q(adc_q),.adc_ovf_q(0),
.sample(sample_rx0), .run(run_rx0), .strobe(strobe_rx0),
.debug() );
vita_rx_chain #(.BASE(SR_RX_CTRL0), .UNIT(0), .FIFOSIZE(9), .PROT_ENG_FLAGS(0)) vita_rx_chain0
(.clk(wb_clk),.reset(wb_rst),.clear(clear_rx),
.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
.vita_time(vita_time), .overrun(rx_overrun_dsp0),
.sample(sample_rx0), .run(run_rx0), .strobe(strobe_rx0),
.rx_data_o(vita_rx_data0), .rx_dst_rdy_i(vita_rx_dst_rdy0), .rx_src_rdy_o(vita_rx_src_rdy0),
.debug() );
// /////////////////////////////////////////////////////////////////////////
// DSP RX 1
wire [31:0] sample_rx1;
wire strobe_rx1;
wire [35:0] vita_rx_data1;
wire vita_rx_src_rdy1, vita_rx_dst_rdy1;
dsp_core_rx #(.BASE(SR_RX_DSP1)) dsp_core_rx1
(.clk(wb_clk),.rst(wb_rst),
.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
.adc_i(adc_i),.adc_ovf_i(0),.adc_q(adc_q),.adc_ovf_q(0),
.sample(sample_rx1), .run(run_rx1), .strobe(strobe_rx1),
.debug() );
vita_rx_chain #(.BASE(SR_RX_CTRL1), .UNIT(1), .FIFOSIZE(9), .PROT_ENG_FLAGS(0)) vita_rx_chain1
(.clk(wb_clk),.reset(wb_rst),.clear(clear_rx),
.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
.vita_time(vita_time), .overrun(rx_overrun_dsp1),
.sample(sample_rx1), .run(run_rx1), .strobe(strobe_rx1),
.rx_data_o(vita_rx_data1), .rx_dst_rdy_i(vita_rx_dst_rdy1), .rx_src_rdy_o(vita_rx_src_rdy1),
.debug() );
// /////////////////////////////////////////////////////////////////////////
// RX Stream muxing
fifo36_mux #(.prio(0)) mux_data_streams
(.clk(wb_clk), .reset(wb_rst), .clear(0),
.data0_i(vita_rx_data0), .src0_rdy_i(vita_rx_src_rdy0), .dst0_rdy_o(vita_rx_dst_rdy0),
.data1_i(vita_rx_data1), .src1_rdy_i(vita_rx_src_rdy1), .dst1_rdy_o(vita_rx_dst_rdy1),
.data_o(rx_data), .src_rdy_o(rx_src_rdy), .dst_rdy_i(rx_dst_rdy));
// ///////////////////////////////////////////////////////////////////////////////////
// DSP TX
wire [23:0] tx_i_int, tx_q_int;
wire run_tx;
vita_tx_chain #(.BASE_CTRL(SR_TX_CTRL), .BASE_DSP(SR_TX_DSP),
.REPORT_ERROR(1), .DO_FLOW_CONTROL(0),
.PROT_ENG_FLAGS(0), .USE_TRANS_HEADER(0),
.DSP_NUMBER(0))
vita_tx_chain
(.clk(wb_clk), .reset(wb_rst),
.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
.vita_time(vita_time),
.tx_data_i(tx_data), .tx_src_rdy_i(tx_src_rdy), .tx_dst_rdy_o(tx_dst_rdy),
.err_data_o(tx_err_data), .err_src_rdy_o(tx_err_src_rdy), .err_dst_rdy_i(tx_err_dst_rdy),
.tx_i(tx_i_int),.tx_q(tx_q_int),
.underrun(tx_underrun_dsp), .run(run_tx),
.debug(debug_vt));
tx_frontend #(.BASE(SR_TX_FRONT), .WIDTH_OUT(14)) tx_frontend
(.clk(wb_clk), .rst(wb_rst),
.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
.tx_i(tx_i_int), .tx_q(tx_q_int), .run(1'b1),
.dac_a(tx_i), .dac_b(tx_q));
// /////////////////////////////////////////////////////////////////////////////////////
// Wishbone Intercon, single master
wire [dw-1:0] s0_dat_mosi, s1_dat_mosi, s0_dat_miso, s1_dat_miso, s2_dat_mosi, s3_dat_mosi, s2_dat_miso, s3_dat_miso,
s4_dat_mosi, s5_dat_mosi, s4_dat_miso, s5_dat_miso, s6_dat_mosi, s7_dat_mosi, s6_dat_miso, s7_dat_miso,
s8_dat_mosi, s9_dat_mosi, s8_dat_miso, s9_dat_miso, sa_dat_mosi, sb_dat_mosi, sa_dat_miso, sb_dat_miso,
sc_dat_mosi, sd_dat_mosi, sc_dat_miso, sd_dat_miso, se_dat_mosi, sf_dat_mosi, se_dat_miso, sf_dat_miso;
wire [aw-1:0] s0_adr,s1_adr,s2_adr,s3_adr,s4_adr,s5_adr,s6_adr,s7_adr;
wire [aw-1:0] s8_adr,s9_adr,sa_adr,sb_adr,sc_adr, sd_adr, se_adr, sf_adr;
wire [sw-1:0] s0_sel,s1_sel,s2_sel,s3_sel,s4_sel,s5_sel,s6_sel,s7_sel;
wire [sw-1:0] s8_sel,s9_sel,sa_sel,sb_sel,sc_sel, sd_sel, se_sel, sf_sel;
wire s0_ack,s1_ack,s2_ack,s3_ack,s4_ack,s5_ack,s6_ack,s7_ack;
wire s8_ack,s9_ack,sa_ack,sb_ack,sc_ack, sd_ack, se_ack, sf_ack;
wire s0_stb,s1_stb,s2_stb,s3_stb,s4_stb,s5_stb,s6_stb,s7_stb;
wire s8_stb,s9_stb,sa_stb,sb_stb,sc_stb, sd_stb, se_stb, sf_stb;
wire s0_cyc,s1_cyc,s2_cyc,s3_cyc,s4_cyc,s5_cyc,s6_cyc,s7_cyc;
wire s8_cyc,s9_cyc,sa_cyc,sb_cyc,sc_cyc, sd_cyc, se_cyc, sf_cyc;
wire s0_we,s1_we,s2_we,s3_we,s4_we,s5_we,s6_we,s7_we;
wire s8_we,s9_we,sa_we,sb_we,sc_we,sd_we, se_we, sf_we;
wb_1master #(.dw(dw), .aw(aw), .sw(sw), .decode_w(4),
.s0_addr(4'h0), .s0_mask(4'hF), .s1_addr(4'h1), .s1_mask(4'hF),
.s2_addr(4'h2), .s2_mask(4'hF), .s3_addr(4'h3), .s3_mask(4'hF),
.s4_addr(4'h4), .s4_mask(4'hF), .s5_addr(4'h5), .s5_mask(4'hF),
.s6_addr(4'h6), .s6_mask(4'hF), .s7_addr(4'h7), .s7_mask(4'hF),
.s8_addr(4'h8), .s8_mask(4'hE), .s9_addr(4'hf), .s9_mask(4'hF), // slave 8 is double wide
.sa_addr(4'ha), .sa_mask(4'hF), .sb_addr(4'hb), .sb_mask(4'hF),
.sc_addr(4'hc), .sc_mask(4'hF), .sd_addr(4'hd), .sd_mask(4'hF),
.se_addr(4'he), .se_mask(4'hF), .sf_addr(4'hf), .sf_mask(4'hF))
wb_1master
(.clk_i(wb_clk),.rst_i(wb_rst),
.m0_dat_o(m0_dat_miso),.m0_ack_o(m0_ack),.m0_err_o(m0_err),.m0_rty_o(m0_rty),.m0_dat_i(m0_dat_mosi),
.m0_adr_i(m0_adr),.m0_sel_i(m0_sel),.m0_we_i(m0_we),.m0_cyc_i(m0_cyc),.m0_stb_i(m0_stb),
.s0_dat_o(s0_dat_mosi),.s0_adr_o(s0_adr),.s0_sel_o(s0_sel),.s0_we_o(s0_we),.s0_cyc_o(s0_cyc),.s0_stb_o(s0_stb),
.s0_dat_i(s0_dat_miso),.s0_ack_i(s0_ack),.s0_err_i(0),.s0_rty_i(0),
.s1_dat_o(s1_dat_mosi),.s1_adr_o(s1_adr),.s1_sel_o(s1_sel),.s1_we_o(s1_we),.s1_cyc_o(s1_cyc),.s1_stb_o(s1_stb),
.s1_dat_i(s1_dat_miso),.s1_ack_i(s1_ack),.s1_err_i(0),.s1_rty_i(0),
.s2_dat_o(s2_dat_mosi),.s2_adr_o(s2_adr),.s2_sel_o(s2_sel),.s2_we_o(s2_we),.s2_cyc_o(s2_cyc),.s2_stb_o(s2_stb),
.s2_dat_i(s2_dat_miso),.s2_ack_i(s2_ack),.s2_err_i(0),.s2_rty_i(0),
.s3_dat_o(s3_dat_mosi),.s3_adr_o(s3_adr),.s3_sel_o(s3_sel),.s3_we_o(s3_we),.s3_cyc_o(s3_cyc),.s3_stb_o(s3_stb),
.s3_dat_i(s3_dat_miso),.s3_ack_i(s3_ack),.s3_err_i(0),.s3_rty_i(0),
.s4_dat_o(s4_dat_mosi),.s4_adr_o(s4_adr),.s4_sel_o(s4_sel),.s4_we_o(s4_we),.s4_cyc_o(s4_cyc),.s4_stb_o(s4_stb),
.s4_dat_i(s4_dat_miso),.s4_ack_i(s4_ack),.s4_err_i(0),.s4_rty_i(0),
.s5_dat_o(s5_dat_mosi),.s5_adr_o(s5_adr),.s5_sel_o(s5_sel),.s5_we_o(s5_we),.s5_cyc_o(s5_cyc),.s5_stb_o(s5_stb),
.s5_dat_i(s5_dat_miso),.s5_ack_i(s5_ack),.s5_err_i(0),.s5_rty_i(0),
.s6_dat_o(s6_dat_mosi),.s6_adr_o(s6_adr),.s6_sel_o(s6_sel),.s6_we_o(s6_we),.s6_cyc_o(s6_cyc),.s6_stb_o(s6_stb),
.s6_dat_i(s6_dat_miso),.s6_ack_i(s6_ack),.s6_err_i(0),.s6_rty_i(0),
.s7_dat_o(s7_dat_mosi),.s7_adr_o(s7_adr),.s7_sel_o(s7_sel),.s7_we_o(s7_we),.s7_cyc_o(s7_cyc),.s7_stb_o(s7_stb),
.s7_dat_i(s7_dat_miso),.s7_ack_i(s7_ack),.s7_err_i(0),.s7_rty_i(0),
.s8_dat_o(s8_dat_mosi),.s8_adr_o(s8_adr),.s8_sel_o(s8_sel),.s8_we_o(s8_we),.s8_cyc_o(s8_cyc),.s8_stb_o(s8_stb),
.s8_dat_i(s8_dat_miso),.s8_ack_i(s8_ack),.s8_err_i(0),.s8_rty_i(0),
.s9_dat_o(s9_dat_mosi),.s9_adr_o(s9_adr),.s9_sel_o(s9_sel),.s9_we_o(s9_we),.s9_cyc_o(s9_cyc),.s9_stb_o(s9_stb),
.s9_dat_i(s9_dat_miso),.s9_ack_i(s9_ack),.s9_err_i(0),.s9_rty_i(0),
.sa_dat_o(sa_dat_mosi),.sa_adr_o(sa_adr),.sa_sel_o(sa_sel),.sa_we_o(sa_we),.sa_cyc_o(sa_cyc),.sa_stb_o(sa_stb),
.sa_dat_i(sa_dat_miso),.sa_ack_i(sa_ack),.sa_err_i(0),.sa_rty_i(0),
.sb_dat_o(sb_dat_mosi),.sb_adr_o(sb_adr),.sb_sel_o(sb_sel),.sb_we_o(sb_we),.sb_cyc_o(sb_cyc),.sb_stb_o(sb_stb),
.sb_dat_i(sb_dat_miso),.sb_ack_i(sb_ack),.sb_err_i(0),.sb_rty_i(0),
.sc_dat_o(sc_dat_mosi),.sc_adr_o(sc_adr),.sc_sel_o(sc_sel),.sc_we_o(sc_we),.sc_cyc_o(sc_cyc),.sc_stb_o(sc_stb),
.sc_dat_i(sc_dat_miso),.sc_ack_i(sc_ack),.sc_err_i(0),.sc_rty_i(0),
.sd_dat_o(sd_dat_mosi),.sd_adr_o(sd_adr),.sd_sel_o(sd_sel),.sd_we_o(sd_we),.sd_cyc_o(sd_cyc),.sd_stb_o(sd_stb),
.sd_dat_i(sd_dat_miso),.sd_ack_i(sd_ack),.sd_err_i(0),.sd_rty_i(0),
.se_dat_o(se_dat_mosi),.se_adr_o(se_adr),.se_sel_o(se_sel),.se_we_o(se_we),.se_cyc_o(se_cyc),.se_stb_o(se_stb),
.se_dat_i(se_dat_miso),.se_ack_i(se_ack),.se_err_i(0),.se_rty_i(0),
.sf_dat_o(sf_dat_mosi),.sf_adr_o(sf_adr),.sf_sel_o(sf_sel),.sf_we_o(sf_we),.sf_cyc_o(sf_cyc),.sf_stb_o(sf_stb),
.sf_dat_i(sf_dat_miso),.sf_ack_i(sf_ack),.sf_err_i(0),.sf_rty_i(0) );
assign s9_ack = 0; assign sa_ack = 0; assign sb_ack = 0;
assign sc_ack = 0; assign sd_ack = 0; assign se_ack = 0; assign sf_ack = 0;
// /////////////////////////////////////////////////////////////////////////////////////
// Slave 0, Misc LEDs, Switches, controls
localparam REG_LEDS = 7'd0; // out
localparam REG_CGEN_CTRL = 7'd4; // out
localparam REG_CGEN_ST = 7'd6; // in
localparam REG_TEST = 7'd8; // out
localparam REG_RX_FRAMELEN = 7'd10; // in
localparam REG_TX_FRAMELEN = 7'd12; // out
localparam REG_XFER_RATE = 7'd14; // out
localparam REG_COMPAT = 7'd16; // in
always @(posedge wb_clk)
if(wb_rst)
begin
reg_leds <= 0;
reg_cgen_ctrl <= 2'b11;
reg_test <= 0;
tx_frame_len <= 0;
xfer_rate <= 0;
end
else
if(s0_cyc & s0_stb & s0_we)
case(s0_adr[6:0])
REG_LEDS :
reg_leds <= s0_dat_mosi;
REG_CGEN_CTRL :
reg_cgen_ctrl <= s0_dat_mosi;
REG_TEST :
reg_test <= s0_dat_mosi;
REG_TX_FRAMELEN :
tx_frame_len <= s0_dat_mosi;
REG_XFER_RATE :
xfer_rate <= s0_dat_mosi;
endcase // case (s0_adr[6:0])
assign test_ctrl = xfer_rate[11:8];
assign test_rate = xfer_rate[7:0];
assign { debug_led[3:0] } = ~{run_rx,run_tx,reg_leds[1:0]};
assign { cgen_sync_b, cgen_ref_sel } = reg_cgen_ctrl;
assign s0_dat_miso = (s0_adr[6:0] == REG_LEDS) ? reg_leds :
(s0_adr[6:0] == REG_CGEN_CTRL) ? reg_cgen_ctrl :
(s0_adr[6:0] == REG_CGEN_ST) ? {13'b0,cgen_st_status,cgen_st_ld,cgen_st_refmon} :
(s0_adr[6:0] == REG_TEST) ? reg_test :
(s0_adr[6:0] == REG_RX_FRAMELEN) ? rx_frame_len :
(s0_adr[6:0] == REG_COMPAT) ? { 8'd0, COMPAT_NUM } :
16'hBEEF;
assign s0_ack = s0_stb & s0_cyc;
// /////////////////////////////////////////////////////////////////////////////////////
// Slave 1, UART
// depth of 3 is 128 entries, clkdiv of 278 gives 230.4k with a 64 MHz system clock
simple_uart #(.TXDEPTH(3),.RXDEPTH(3), .CLKDIV_DEFAULT(278)) uart
(.clk_i(wb_clk),.rst_i(wb_rst),
.we_i(s1_we),.stb_i(s1_stb),.cyc_i(s1_cyc),.ack_o(s1_ack),
.adr_i(s1_adr[3:1]),.dat_i({16'd0,s1_dat_mosi}),.dat_o(s1_dat_miso),
.rx_int_o(),.tx_int_o(),
.tx_o(debug_txd),.rx_i(debug_rxd),.baud_o());
// /////////////////////////////////////////////////////////////////////////////////////
// Slave 2, SPI
spi_top16 shared_spi
(.wb_clk_i(wb_clk),.wb_rst_i(wb_rst),.wb_adr_i(s2_adr[4:0]),.wb_dat_i(s2_dat_mosi),
.wb_dat_o(s2_dat_miso),.wb_sel_i(s2_sel),.wb_we_i(s2_we),.wb_stb_i(s2_stb),
.wb_cyc_i(s2_cyc),.wb_ack_o(s2_ack),.wb_err_o(),.wb_int_o(),
.ss_pad_o(sen), .sclk_pad_o(sclk), .mosi_pad_o(mosi), .miso_pad_i(miso) );
// /////////////////////////////////////////////////////////////////////////
// Slave 3, I2C
wire scl_pad_i, scl_pad_o, scl_pad_oen_o, sda_pad_i, sda_pad_o, sda_pad_oen_o;
i2c_master_top #(.ARST_LVL(1)) i2c
(.wb_clk_i(wb_clk),.wb_rst_i(wb_rst),.arst_i(1'b0),
.wb_adr_i(s3_adr[3:1]),.wb_dat_i(s3_dat_mosi[7:0]),.wb_dat_o(s3_dat_miso[7:0]),
.wb_we_i(s3_we),.wb_stb_i(s3_stb),.wb_cyc_i(s3_cyc),
.wb_ack_o(s3_ack),.wb_inta_o(),
.scl_pad_i(scl_pad_i),.scl_pad_o(scl_pad_o),.scl_padoen_o(scl_pad_oen_o),
.sda_pad_i(sda_pad_i),.sda_pad_o(sda_pad_o),.sda_padoen_o(sda_pad_oen_o) );
assign s3_dat_miso[15:8] = 8'd0;
// I2C -- Don't use external transistors for open drain, the FPGA implements this
IOBUF scl_pin(.O(scl_pad_i), .IO(db_scl), .I(scl_pad_o), .T(scl_pad_oen_o));
IOBUF sda_pin(.O(sda_pad_i), .IO(db_sda), .I(sda_pad_o), .T(sda_pad_oen_o));
// /////////////////////////////////////////////////////////////////////////
// GPIOs -- Slave #4
wire [31:0] atr_lines;
wire [31:0] debug_gpio_0, debug_gpio_1;
nsgpio16LE
nsgpio16LE(.clk_i(wb_clk),.rst_i(wb_rst),
.cyc_i(s4_cyc),.stb_i(s4_stb),.adr_i(s4_adr[3:0]),.we_i(s4_we),
.dat_i(s4_dat_mosi),.dat_o(s4_dat_miso),.ack_o(s4_ack),
.atr(atr_lines),.debug_0(debug_gpio_0),.debug_1(debug_gpio_1),
.gpio( {io_tx,io_rx} ) );
////////////////////////////////////////////////////////////////////////////
// FIFO to WB slave for async messages - Slave #5
//signals between fifo and buffer module
wire [35:0] _tx_err_data;
wire _tx_err_src_rdy, _tx_err_dst_rdy;
fifo_cascade #(.WIDTH(36), .SIZE(9/*512 lines plenty for short pkts*/)) err_fifo(
.clk(wb_clk), .reset(wb_rst), .clear(wb_rst),
.datain(tx_err_data), .src_rdy_i(tx_err_src_rdy), .dst_rdy_o(tx_err_dst_rdy),
.dataout(_tx_err_data), .src_rdy_o(_tx_err_src_rdy), .dst_rdy_i(_tx_err_dst_rdy)
);
wire [31:0] err_status, err_data32;
//the buffer is 32 bits, but the data is 16, so mux based on the addr bit
assign s5_dat_miso = (s5_adr[1] == 1'b0)? err_data32[15:0] : err_data32[31:16];
buffer_int2 #(.BASE(SR_ERR_CTRL), .BUF_SIZE(5)) fifo_to_wb(
.clk(wb_clk), .rst(wb_rst),
.set_stb(set_stb), .set_addr(set_addr), .set_data(set_data),
.status(err_status),
// Wishbone interface to RAM
.wb_clk_i(wb_clk), .wb_rst_i(wb_rst),
.wb_we_i(s5_we), .wb_stb_i(s5_stb),
.wb_adr_i(s5_adr), .wb_dat_i({16'b0, s5_dat_mosi}),
.wb_dat_o(err_data32), .wb_ack_o(s5_ack),
// Write FIFO Interface
.wr_data_i(_tx_err_data), .wr_ready_i(_tx_err_src_rdy), .wr_ready_o(_tx_err_dst_rdy),
// Read FIFO Interface
.rd_data_o(), .rd_ready_o(), .rd_ready_i(1'b0)
);
////////////////////////////////////////////////////////////////////////////
// Interrupts
assign proc_int = (|err_status[1:0]);
// /////////////////////////////////////////////////////////////////////////
// Settings Bus -- Slave #8 + 9
// only have 64 regs, 32 bits each with current setup...
settings_bus_16LE #(.AWIDTH(11),.RWIDTH(6)) settings_bus_16LE
(.wb_clk(wb_clk),.wb_rst(wb_rst),.wb_adr_i(s8_adr),.wb_dat_i(s8_dat_mosi),
.wb_stb_i(s8_stb),.wb_we_i(s8_we),.wb_ack_o(s8_ack),
.strobe(set_stb),.addr(set_addr),.data(set_data) );
// /////////////////////////////////////////////////////////////////////////
// ATR Controller -- Slave #6
atr_controller16 atr_controller16
(.clk_i(wb_clk), .rst_i(wb_rst),
.adr_i(s6_adr[5:0]), .sel_i(s6_sel), .dat_i(s6_dat_mosi), .dat_o(s6_dat_miso),
.we_i(s6_we), .stb_i(s6_stb), .cyc_i(s6_cyc), .ack_o(s6_ack),
.run_rx(run_rx), .run_tx(run_tx), .ctrl_lines(atr_lines));
// /////////////////////////////////////////////////////////////////////////
// Readback mux 32 -- Slave #7
wire [31:0] reg_test32;
//this setting reg is persistent across resets, to check for fpga loaded
setting_reg #(.my_addr(SR_REG_TEST32)) sr_reg_test32
(.clk(wb_clk),.rst(/*wb_rst*/1'b0),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(reg_test32),.changed());
wb_readback_mux_16LE readback_mux_32
(.wb_clk_i(wb_clk), .wb_rst_i(wb_rst), .wb_stb_i(s7_stb),
.wb_adr_i({5'b0,s7_adr}), .wb_dat_o(s7_dat_miso), .wb_ack_o(s7_ack),
.word00(vita_time[63:32]), .word01(vita_time[31:0]),
.word02(vita_time_pps[63:32]), .word03(vita_time_pps[31:0]),
.word04(reg_test32), .word05(err_status),
.word06(32'b0), .word07(32'b0),
.word08(32'b0), .word09(32'b0),
.word10(32'b0), .word11(32'b0),
.word12(32'b0), .word13(32'b0),
.word14(32'b0), .word15(32'b0)
);
// /////////////////////////////////////////////////////////////////////////
// VITA Timing
time_64bit #(.TICKS_PER_SEC(32'd64000000),.BASE(SR_TIME64)) time_64bit
(.clk(wb_clk), .rst(wb_rst), .set_stb(set_stb), .set_addr(set_addr), .set_data(set_data),
.pps(pps_in), .vita_time(vita_time), .vita_time_pps(vita_time_pps), .pps_int(pps_int),
.exp_time_in(0));
// /////////////////////////////////////////////////////////////////////////////////////
// Debug circuitry
assign debug_clk = { EM_CLK, clk_fpga };
/*
assign debug = { { rx_have_data, tx_have_space, EM_NCS6, EM_NCS5, EM_NCS4, EM_NWE, EM_NOE, rx_overrun },
{ tx_src_rdy, tx_src_rdy_int, tx_dst_rdy, tx_dst_rdy_int, rx_src_rdy, rx_src_rdy_int, rx_dst_rdy, rx_dst_rdy_int },
{ EM_D } };
*/
assign debug = debug_gpmc;
assign debug_gpio_0 = { {run_tx, 1'b0, run_rx, strobe_rx0, tx_i[11:0]},
{2'b00, tx_src_rdy, tx_dst_rdy, tx_q[11:0]} };
assign debug_gpio_1 = debug_vt;
/*
assign debug_gpio_1 = { {rx_enable, rx_src_rdy, rx_dst_rdy, rx_src_rdy & ~rx_dst_rdy},
{tx_enable, tx_src_rdy, tx_dst_rdy, tx_dst_rdy & ~tx_src_rdy},
{2'b0, rx_src_rdy, rx_dst_rdy, rx_data[33:32],2'b0},
{2'b0, bus_error, debug_gpmc[4:0] },
{misc_gpio[7:0]} };
*/
endmodule // u1e_core
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