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-rw-r--r--fpga/usrp2/top/u2_rev3/u2_rev3.v572
1 files changed, 572 insertions, 0 deletions
diff --git a/fpga/usrp2/top/u2_rev3/u2_rev3.v b/fpga/usrp2/top/u2_rev3/u2_rev3.v
new file mode 100644
index 000000000..4f7f9bf1a
--- /dev/null
+++ b/fpga/usrp2/top/u2_rev3/u2_rev3.v
@@ -0,0 +1,572 @@
+`timescale 1ns / 1ps
+//////////////////////////////////////////////////////////////////////////////////
+
+module u2_rev3
+ (
+ // Misc, debug
+ output [5:0] leds,
+ output [31:0] debug,
+ output [1:0] debug_clk,
+ output uart_tx_o,
+ input uart_rx_i,
+
+ // Expansion
+ input exp_pps_in_p, // Diff
+ input exp_pps_in_n, // Diff
+ output exp_pps_out_p, // Diff
+ output exp_pps_out_n, // Diff
+
+ // GMII
+ // GMII-CTRL
+ input GMII_COL,
+ input GMII_CRS,
+
+ // GMII-TX
+ output reg [7:0] GMII_TXD,
+ output reg GMII_TX_EN,
+ output reg GMII_TX_ER,
+ output GMII_GTX_CLK,
+ input GMII_TX_CLK, // 100mbps clk
+
+ // GMII-RX
+ input [7:0] GMII_RXD,
+ input GMII_RX_CLK,
+ input GMII_RX_DV,
+ input GMII_RX_ER,
+
+ // GMII-Management
+ inout MDIO,
+ output MDC,
+ input PHY_INTn, // open drain
+ output PHY_RESETn,
+ input PHY_CLK, // possibly use on-board osc
+
+ // RAM
+ inout [17:0] RAM_D,
+ output [18:0] RAM_A,
+ output RAM_CE1n,
+ output RAM_CENn,
+ output RAM_CLK,
+ output RAM_WEn,
+ output RAM_OEn,
+ output RAM_LDn,
+
+ // SERDES
+ output ser_enable,
+ output ser_prbsen,
+ output ser_loopen,
+ output ser_rx_en,
+
+ output ser_tx_clk,
+ output reg [15:0] ser_t,
+ output reg ser_tklsb,
+ output reg ser_tkmsb,
+
+ input ser_rx_clk,
+ input [15:0] ser_r,
+ input ser_rklsb,
+ input ser_rkmsb,
+
+ // CPLD interface
+ output cpld_start, // AA9
+ output cpld_mode, // U12
+ output cpld_done, // V12
+ input cpld_din, // AA14 Now shared with CFG_Din
+ input cpld_clk, // AB14 serial clock
+ input cpld_detached,// V11 unused
+ output cpld_init_b, // W12 unused dual purpose
+ output cpld_misc, // Y12
+
+ // Watchdog interface
+ input POR,
+ output WDI,
+
+ // ADC
+ input [13:0] adc_a,
+ input adc_ovf_a,
+ output adc_oen_a,
+ output adc_pdn_a,
+
+ input [13:0] adc_b,
+ input adc_ovf_b,
+ output adc_oen_b,
+ output adc_pdn_b,
+
+ // DAC
+ output reg [15:0] dac_a,
+ output reg [15:0] dac_b,
+ input dac_lock, // unused for now
+
+ // I2C
+ inout SCL,
+ inout SDA,
+
+ // Clock Gen Control
+ output [1:0] clk_en,
+ output [1:0] clk_sel,
+ input clk_func, // FIXME is an input to control the 9510
+ input clk_status,
+
+ // Clocks
+ input clk_fpga_p, // Diff
+ input clk_fpga_n, // Diff
+ input clk_to_mac,
+ input pps_in,
+
+ // Generic SPI
+ output sclk,
+ output sen_clk,
+ output sen_dac,
+ output sdi,
+ input sdo,
+
+ // TX DBoard
+ output sen_tx_db,
+ output sclk_tx_db,
+ input sdo_tx_db,
+ output sdi_tx_db,
+
+ output sen_tx_adc,
+ output sclk_tx_adc,
+ input sdo_tx_adc,
+ output sdi_tx_adc,
+
+ output sen_tx_dac,
+ output sclk_tx_dac,
+ output sdi_tx_dac,
+
+ inout [15:0] io_tx,
+
+ // RX DBoard
+ output sen_rx_db,
+ output sclk_rx_db,
+ input sdo_rx_db,
+ output sdi_rx_db,
+
+ output sen_rx_adc,
+ output sclk_rx_adc,
+ input sdo_rx_adc,
+ output sdi_rx_adc,
+
+ output sen_rx_dac,
+ output sclk_rx_dac,
+ output sdi_rx_dac,
+
+ inout [15:0] io_rx
+ );
+
+ assign cpld_init_b = 0;
+ // FPGA-specific pins connections
+ wire clk_fpga, dsp_clk, clk_div, dcm_out, wb_clk, clock_ready;
+ wire clk90, clk180, clk270;
+
+ // reset the watchdog continuously
+ reg [15:0] wd;
+ wire config_success;
+
+ always @(posedge wb_clk)
+ if(~config_success)
+ wd <= 0;
+ else
+ wd <= wd + 1;
+ assign WDI = wd[15];
+
+ wire clk_fpga_unbuf;
+
+ IBUFGDS clk_fpga_pin (.O(clk_fpga_unbuf),.I(clk_fpga_p),.IB(clk_fpga_n));
+ BUFG clk_fpga_BUF (.O(clk_fpga),.I(clk_fpga_unbuf));
+
+ defparam clk_fpga_pin.IOSTANDARD = "LVPECL_25";
+
+ wire cpld_clock_buf;
+ BUFG cpld_clock_BUF (.O(cpld_clock_buf),.I(cpld_clock));
+
+ wire exp_pps_in;
+ IBUFDS exp_pps_in_pin (.O(exp_pps_in),.I(exp_pps_in_p),.IB(exp_pps_in_n));
+ defparam exp_pps_in_pin.IOSTANDARD = "LVDS_25";
+
+ wire exp_pps_out;
+ OBUFDS exp_pps_out_pin (.O(exp_pps_out_p),.OB(exp_pps_out_n),.I(exp_pps_out));
+ defparam exp_pps_out_pin.IOSTANDARD = "LVDS_25";
+
+ reg [5:0] clock_ready_d;
+ always @(posedge clk_fpga)
+ clock_ready_d[5:0] <= {clock_ready_d[4:0],clock_ready};
+ wire dcm_rst = ~&clock_ready_d & |clock_ready_d;
+
+ wire adc_on_a, adc_on_b, adc_oe_a, adc_oe_b;
+ assign adc_oen_a = ~adc_oe_a;
+ assign adc_oen_b = ~adc_oe_b;
+ assign adc_pdn_a = ~adc_on_a;
+ assign adc_pdn_b = ~adc_on_b;
+
+ reg [13:0] adc_a_reg1, adc_b_reg1, adc_a_reg2, adc_b_reg2;
+ reg adc_ovf_a_reg1, adc_ovf_a_reg2, adc_ovf_b_reg1, adc_ovf_b_reg2;
+
+ // ADC A and B are swapped in schematic to facilitate clean layout
+ always @(posedge dsp_clk)
+ begin
+ adc_a_reg1 <= adc_b;
+ adc_b_reg1 <= adc_a;
+ adc_ovf_a_reg1 <= adc_ovf_b;
+ adc_ovf_b_reg1 <= adc_ovf_a;
+ end
+
+ always @(posedge dsp_clk)
+ begin
+ adc_a_reg2 <= adc_a_reg1;
+ adc_b_reg2 <= adc_b_reg1;
+ adc_ovf_a_reg2 <= adc_ovf_a_reg1;
+ adc_ovf_b_reg2 <= adc_ovf_b_reg1;
+ end // always @ (posedge dsp_clk)
+
+ // Handle Clocks
+ DCM DCM_INST (.CLKFB(dsp_clk),
+ .CLKIN(clk_fpga),
+ .DSSEN(0),
+ .PSCLK(0),
+ .PSEN(0),
+ .PSINCDEC(0),
+ .RST(dcm_rst),
+ .CLKDV(clk_div),
+ .CLKFX(),
+ .CLKFX180(),
+ .CLK0(dcm_out),
+ .CLK2X(),
+ .CLK2X180(),
+ .CLK90(clk90),
+ .CLK180(clk180),
+ .CLK270(clk270),
+ .LOCKED(LOCKED_OUT),
+ .PSDONE(),
+ .STATUS());
+ defparam DCM_INST.CLK_FEEDBACK = "1X";
+ defparam DCM_INST.CLKDV_DIVIDE = 2.0;
+ defparam DCM_INST.CLKFX_DIVIDE = 1;
+ defparam DCM_INST.CLKFX_MULTIPLY = 4;
+ defparam DCM_INST.CLKIN_DIVIDE_BY_2 = "FALSE";
+ defparam DCM_INST.CLKIN_PERIOD = 10.000;
+ defparam DCM_INST.CLKOUT_PHASE_SHIFT = "NONE";
+ defparam DCM_INST.DESKEW_ADJUST = "SYSTEM_SYNCHRONOUS";
+ defparam DCM_INST.DFS_FREQUENCY_MODE = "LOW";
+ defparam DCM_INST.DLL_FREQUENCY_MODE = "LOW";
+ defparam DCM_INST.DUTY_CYCLE_CORRECTION = "TRUE";
+ defparam DCM_INST.FACTORY_JF = 16'h8080;
+ defparam DCM_INST.PHASE_SHIFT = 0;
+ defparam DCM_INST.STARTUP_WAIT = "FALSE";
+
+ BUFG dspclk_BUFG (.I(dcm_out), .O(dsp_clk));
+ BUFG wbclk_BUFG (.I(clk_div), .O(wb_clk));
+
+ // I2C -- Don't use external transistors for open drain, the FPGA implements this
+ IOBUF scl_pin(.O(scl_pad_i), .IO(SCL), .I(scl_pad_o), .T(scl_pad_oen_o));
+ IOBUF sda_pin(.O(sda_pad_i), .IO(SDA), .I(sda_pad_o), .T(sda_pad_oen_o));
+
+ // LEDs are active low outputs
+ wire [5:0] leds_int;
+ assign leds = 6'b011111 ^ leds_int; // all except eth are active-low
+
+ // SPI
+ wire miso, mosi, sclk_int;
+ assign {sclk,sdi} = (~sen_clk | ~sen_dac) ? {sclk_int,mosi} : 2'b0;
+ assign {sclk_tx_db,sdi_tx_db} = ~sen_tx_db ? {sclk_int,mosi} : 2'b0;
+ assign {sclk_tx_dac,sdi_tx_dac} = ~sen_tx_dac ? {sclk_int,mosi} : 2'b0;
+ assign {sclk_tx_adc,sdi_tx_adc} = ~sen_tx_adc ? {sclk_int,mosi} : 2'b0;
+ assign {sclk_rx_db,sdi_rx_db} = ~sen_rx_db ? {sclk_int,mosi} : 2'b0;
+ assign {sclk_rx_dac,sdi_rx_dac} = ~sen_rx_dac ? {sclk_int,mosi} : 2'b0;
+ assign {sclk_rx_adc,sdi_rx_adc} = ~sen_rx_adc ? {sclk_int,mosi} : 2'b0;
+
+ assign miso = (~sen_clk & sdo) | (~sen_dac & sdo) |
+ (~sen_tx_db & sdo_tx_db) | (~sen_tx_adc & sdo_tx_adc) |
+ (~sen_rx_db & sdo_rx_db) | (~sen_rx_adc & sdo_rx_adc);
+
+ wire GMII_TX_EN_unreg, GMII_TX_ER_unreg;
+ wire [7:0] GMII_TXD_unreg;
+ wire GMII_GTX_CLK_int;
+
+ always @(posedge GMII_GTX_CLK_int)
+ begin
+ GMII_TX_EN <= GMII_TX_EN_unreg;
+ GMII_TX_ER <= GMII_TX_ER_unreg;
+ GMII_TXD <= GMII_TXD_unreg;
+ end
+
+ OFDDRRSE OFDDRRSE_gmii_inst
+ (.Q(GMII_GTX_CLK), // Data output (connect directly to top-level port)
+ .C0(GMII_GTX_CLK_int), // 0 degree clock input
+ .C1(~GMII_GTX_CLK_int), // 180 degree clock input
+ .CE(1), // Clock enable input
+ .D0(0), // Posedge data input
+ .D1(1), // Negedge data input
+ .R(0), // Synchronous reset input
+ .S(0) // Synchronous preset input
+ );
+
+ wire ser_tklsb_unreg, ser_tkmsb_unreg;
+ wire [15:0] ser_t_unreg;
+ wire ser_tx_clk_int;
+
+ always @(posedge ser_tx_clk_int)
+ begin
+ ser_tklsb <= ser_tklsb_unreg;
+ ser_tkmsb <= ser_tkmsb_unreg;
+ ser_t <= ser_t_unreg;
+ end
+
+ assign ser_tx_clk = clk_fpga;
+
+ reg [15:0] ser_r_int;
+ reg ser_rklsb_int, ser_rkmsb_int;
+
+ wire ser_rx_clk_buf;
+ BUFG ser_rx_clk_BUF (.O(ser_rx_clk_buf),.I(ser_rx_clk));
+ always @(posedge ser_rx_clk_buf)
+ begin
+ ser_r_int <= ser_r;
+ ser_rklsb_int <= ser_rklsb;
+ ser_rkmsb_int <= ser_rkmsb;
+ end
+
+ wire [15:0] dac_a_int, dac_b_int;
+ // DAC A and B are swapped in schematic to facilitate clean layout
+ // DAC A is also inverted in schematic to facilitate clean layout
+ always @(posedge dsp_clk) dac_a <= ~dac_b_int;
+ always @(posedge dsp_clk) dac_b <= dac_a_int;
+
+ /*
+ OFDDRRSE OFDDRRSE_serdes_inst
+ (.Q(ser_tx_clk), // Data output (connect directly to top-level port)
+ .C0(ser_tx_clk_int), // 0 degree clock input
+ .C1(~ser_tx_clk_int), // 180 degree clock input
+ .CE(1), // Clock enable input
+ .D0(0), // Posedge data input
+ .D1(1), // Negedge data input
+ .R(0), // Synchronous reset input
+ .S(0) // Synchronous preset input
+ );
+ */
+
+ wire [17:0] RAM_D_pi;
+ wire [17:0] RAM_D_po;
+ wire RAM_D_poe;
+
+ genvar i;
+
+ //
+ // Instantiate IO for Bidirectional bus to SRAM
+ //
+
+ generate
+ for (i=0;i<18;i=i+1)
+ begin : gen_RAM_D_IO
+
+ IOBUF #(
+ .DRIVE(12),
+ .IOSTANDARD("LVCMOS25"),
+ .SLEW("FAST")
+ )
+ RAM_D_i (
+ .O(RAM_D_pi[i]),
+ .I(RAM_D_po[i]),
+ .IO(RAM_D[i]),
+ .T(RAM_D_poe)
+ );
+ end // block: gen_RAM_D_IO
+ endgenerate
+
+ //
+ // DCM edits start here
+ //
+
+
+ wire RAM_CLK_buf;
+ wire clk_to_mac_buf;
+ wire clk125_ext_clk0;
+ wire clk125_ext_clk180;
+ wire clk125_ext_clk0_buf;
+ wire clk125_ext_clk180_buf;
+ wire clk125_int_buf;
+ wire clk125_int;
+
+ IBUFG clk_to_mac_buf_i1 (.I(clk_to_mac),
+ .O(clk_to_mac_buf));
+
+ DCM DCM_INST1 (.CLKFB(RAM_CLK_buf),
+ .CLKIN(clk_to_mac_buf),
+ .DSSEN(1'b0),
+ .PSCLK(1'b0),
+ .PSEN(1'b0),
+ .PSINCDEC(1'b0),
+ .RST(1'b0),
+ .CLK0(clk125_ext_clk0),
+ .CLK180(clk125_ext_clk180) );
+ defparam DCM_INST1.CLK_FEEDBACK = "1X";
+ defparam DCM_INST1.CLKDV_DIVIDE = 2.0;
+ defparam DCM_INST1.CLKFX_DIVIDE = 1;
+ defparam DCM_INST1.CLKFX_MULTIPLY = 4;
+ defparam DCM_INST1.CLKIN_DIVIDE_BY_2 = "FALSE";
+ defparam DCM_INST1.CLKIN_PERIOD = 8.000;
+ defparam DCM_INST1.CLKOUT_PHASE_SHIFT = "FIXED";
+ defparam DCM_INST1.DESKEW_ADJUST = "SYSTEM_SYNCHRONOUS";
+ defparam DCM_INST1.DFS_FREQUENCY_MODE = "LOW";
+ defparam DCM_INST1.DLL_FREQUENCY_MODE = "LOW";
+ defparam DCM_INST1.DUTY_CYCLE_CORRECTION = "TRUE";
+ defparam DCM_INST1.FACTORY_JF = 16'h8080;
+ defparam DCM_INST1.PHASE_SHIFT = -64;
+ defparam DCM_INST1.STARTUP_WAIT = "FALSE";
+
+ IBUFG RAM_CLK_buf_i1 (.I(RAM_CLK),
+ .O(RAM_CLK_buf));
+ BUFG clk125_ext_clk0_buf_i1 (.I(clk125_ext_clk0),
+ .O(clk125_ext_clk0_buf));
+ BUFG clk125_ext_clk180_buf_i1 (.I(clk125_ext_clk180),
+ .O(clk125_ext_clk180_buf));
+
+ OFDDRRSE RAM_CLK_i1 (.Q(RAM_CLK),
+ .C0(clk125_ext_clk0_buf),
+ .C1(clk125_ext_clk180_buf),
+ .CE(1'b1),
+ .D0(1'b1),
+ .D1(1'b0),
+ .R(1'b0),
+ .S(1'b0));
+
+// SRL16 dcm2_rst_i1 (.D(1'b0),
+// .CLK(clk_to_mac_buf),
+// .Q(dcm2_rst),
+// .A0(1'b1),
+// .A1(1'b1),
+// .A2(1'b1),
+// .A3(1'b1));
+ // synthesis attribute init of dcm2_rst_i1 is "000F";
+
+ DCM DCM_INST2 (.CLKFB(clk125_int_buf),
+ .CLKIN(clk_to_mac_buf),
+ .DSSEN(1'b0),
+ .PSCLK(1'b0),
+ .PSEN(1'b0),
+ .PSINCDEC(1'b0),
+ .RST(1'b0),
+ .CLK0(clk125_int));
+ defparam DCM_INST2.CLK_FEEDBACK = "1X";
+ defparam DCM_INST2.CLKDV_DIVIDE = 2.0;
+ defparam DCM_INST2.CLKFX_DIVIDE = 1;
+ defparam DCM_INST2.CLKFX_MULTIPLY = 4;
+ defparam DCM_INST2.CLKIN_DIVIDE_BY_2 = "FALSE";
+ defparam DCM_INST2.CLKIN_PERIOD = 8.000;
+ defparam DCM_INST2.CLKOUT_PHASE_SHIFT = "NONE";
+ defparam DCM_INST2.DESKEW_ADJUST = "SYSTEM_SYNCHRONOUS";
+ defparam DCM_INST2.DFS_FREQUENCY_MODE = "LOW";
+ defparam DCM_INST2.DLL_FREQUENCY_MODE = "LOW";
+ defparam DCM_INST2.DUTY_CYCLE_CORRECTION = "TRUE";
+ defparam DCM_INST2.FACTORY_JF = 16'h8080;
+ defparam DCM_INST2.PHASE_SHIFT = 0;
+ defparam DCM_INST2.STARTUP_WAIT = "FALSE";
+
+ BUFG clk125_int_buf_i1 (.I(clk125_int),
+ .O(clk125_int_buf));
+
+ //
+ // DCM edits end here
+ //
+
+
+ u2_core #(.RAM_SIZE(32768))
+ u2_core(.dsp_clk (dsp_clk),
+ .wb_clk (wb_clk),
+ .clock_ready (clock_ready),
+ .clk_to_mac (clk125_int_buf),
+ .pps_in (pps_in),
+ .leds (leds_int),
+ .debug (debug[31:0]),
+ .debug_clk (debug_clk[1:0]),
+ .exp_pps_in (exp_pps_in),
+ .exp_pps_out (exp_pps_out),
+ .GMII_COL (GMII_COL),
+ .GMII_CRS (GMII_CRS),
+ .GMII_TXD (GMII_TXD_unreg[7:0]),
+ .GMII_TX_EN (GMII_TX_EN_unreg),
+ .GMII_TX_ER (GMII_TX_ER_unreg),
+ .GMII_GTX_CLK (GMII_GTX_CLK_int),
+ .GMII_TX_CLK (GMII_TX_CLK),
+ .GMII_RXD (GMII_RXD[7:0]),
+ .GMII_RX_CLK (GMII_RX_CLK),
+ .GMII_RX_DV (GMII_RX_DV),
+ .GMII_RX_ER (GMII_RX_ER),
+ .MDIO (MDIO),
+ .MDC (MDC),
+ .PHY_INTn (PHY_INTn),
+ .PHY_RESETn (PHY_RESETn),
+ .ser_enable (ser_enable),
+ .ser_prbsen (ser_prbsen),
+ .ser_loopen (ser_loopen),
+ .ser_rx_en (ser_rx_en),
+ .ser_tx_clk (ser_tx_clk_int),
+ .ser_t (ser_t_unreg[15:0]),
+ .ser_tklsb (ser_tklsb_unreg),
+ .ser_tkmsb (ser_tkmsb_unreg),
+ .ser_rx_clk (ser_rx_clk_buf),
+ .ser_r (ser_r_int[15:0]),
+ .ser_rklsb (ser_rklsb_int),
+ .ser_rkmsb (ser_rkmsb_int),
+ .cpld_start (cpld_start),
+ .cpld_mode (cpld_mode),
+ .cpld_done (cpld_done),
+ .cpld_din (cpld_din),
+ .cpld_clk (cpld_clk),
+ .cpld_detached (cpld_detached),
+ .cpld_misc (cpld_misc),
+ .cpld_init_b (cpld_init_b),
+ .por (~POR),
+ .config_success (config_success),
+ .adc_a (adc_a_reg2),
+ .adc_ovf_a (adc_ovf_a_reg2),
+ .adc_on_a (adc_on_a),
+ .adc_oe_a (adc_oe_a),
+ .adc_b (adc_b_reg2),
+ .adc_ovf_b (adc_ovf_b_reg2),
+ .adc_on_b (adc_on_b),
+ .adc_oe_b (adc_oe_b),
+ .dac_a (dac_a_int),
+ .dac_b (dac_b_int),
+ .scl_pad_i (scl_pad_i),
+ .scl_pad_o (scl_pad_o),
+ .scl_pad_oen_o (scl_pad_oen_o),
+ .sda_pad_i (sda_pad_i),
+ .sda_pad_o (sda_pad_o),
+ .sda_pad_oen_o (sda_pad_oen_o),
+ .clk_en (clk_en[1:0]),
+ .clk_sel (clk_sel[1:0]),
+ .clk_func (clk_func),
+ .clk_status (clk_status),
+ .sclk (sclk_int),
+ .mosi (mosi),
+ .miso (miso),
+ .sen_clk (sen_clk),
+ .sen_dac (sen_dac),
+ .sen_tx_db (sen_tx_db),
+ .sen_tx_adc (sen_tx_adc),
+ .sen_tx_dac (sen_tx_dac),
+ .sen_rx_db (sen_rx_db),
+ .sen_rx_adc (sen_rx_adc),
+ .sen_rx_dac (sen_rx_dac),
+ .io_tx (io_tx[15:0]),
+ .io_rx (io_rx[15:0]),
+ .RAM_D_pi (RAM_D_pi),
+ .RAM_D_po (RAM_D_po),
+ .RAM_D_poe (RAM_D_poe),
+ .RAM_A (RAM_A),
+ .RAM_CE1n (RAM_CE1n),
+ .RAM_CENn (RAM_CENn),
+ // .RAM_CLK (RAM_CLK),
+ .RAM_WEn (RAM_WEn),
+ .RAM_OEn (RAM_OEn),
+ .RAM_LDn (RAM_LDn),
+ .uart_tx_o (uart_tx_o),
+ .uart_rx_i (uart_rx_i),
+ .uart_baud_o (),
+ .sim_mode (1'b0),
+ .clock_divider (2)
+ );
+
+endmodule // u2_rev2
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