diff options
Diffstat (limited to 'fpga/usrp2/gpif')
| -rw-r--r-- | fpga/usrp2/gpif/Makefile.srcs | 6 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/gpif.v | 185 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/gpif_rd.v | 111 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/gpif_tb.v | 142 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/gpif_wr.v | 95 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/gpif_wr_tb.v | 110 | ||||
| -rwxr-xr-x | fpga/usrp2/gpif/lint | 2 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/packet_splitter.v | 123 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/packet_splitter_tb.v | 137 | ||||
| -rw-r--r-- | fpga/usrp2/gpif/slave_fifo.v | 36 |
10 files changed, 27 insertions, 920 deletions
diff --git a/fpga/usrp2/gpif/Makefile.srcs b/fpga/usrp2/gpif/Makefile.srcs index 06cde8afa..524e3660d 100644 --- a/fpga/usrp2/gpif/Makefile.srcs +++ b/fpga/usrp2/gpif/Makefile.srcs @@ -1,15 +1,11 @@ # -# Copyright 2010 Ettus Research LLC +# Copyright 2010-2012 Ettus Research LLC # ################################################## # SERDES Sources ################################################## GPIF_SRCS = $(abspath $(addprefix $(BASE_DIR)/../gpif/, \ -gpif.v \ -gpif_wr.v \ -gpif_rd.v \ packet_reframer.v \ -packet_splitter.v \ slave_fifo.v \ )) diff --git a/fpga/usrp2/gpif/gpif.v b/fpga/usrp2/gpif/gpif.v deleted file mode 100644 index e5b63d5a3..000000000 --- a/fpga/usrp2/gpif/gpif.v +++ /dev/null @@ -1,185 +0,0 @@ -// -// 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 gpif - #(parameter TXFIFOSIZE = 11, parameter RXFIFOSIZE = 11) - (// GPIF signals - input gpif_clk, input gpif_rst, - inout [15:0] gpif_d, input [3:0] gpif_ctl, output [3:0] gpif_rdy, - output [2:0] gpif_misc, - - // Wishbone signals - input wb_clk, input wb_rst, - output [15:0] wb_adr_o, output [15:0] wb_dat_mosi, input [15:0] wb_dat_miso, - output [1:0] wb_sel_o, output wb_cyc_o, output wb_stb_o, output wb_we_o, input wb_ack_i, - input [7:0] triggers, - - // FIFO interface - input fifo_clk, input fifo_rst, input clear_tx, input clear_rx, - output [35:0] tx_data_o, output tx_src_rdy_o, input tx_dst_rdy_i, - input [35:0] rx_data_i, input rx_src_rdy_i, output rx_dst_rdy_o, - input [35:0] tx_err_data_i, input tx_err_src_rdy_i, output tx_err_dst_rdy_o, - - output tx_underrun, output rx_overrun, - input [7:0] frames_per_packet, - output [31:0] debug0, output [31:0] debug1 - ); - - assign tx_underrun = 0; - assign rx_overrun = 0; - - wire WR = gpif_ctl[0]; - wire RD = gpif_ctl[1]; - wire OE = gpif_ctl[2]; - wire EP = gpif_ctl[3]; - - wire CF, CE, DF, DE; - - assign gpif_rdy = { CF, CE, DF, DE }; - - wire [15:0] gpif_d_out; - assign gpif_d = OE ? gpif_d_out : 16'bz; - - wire [15:0] gpif_d_copy = gpif_d; - - wire [31:0] debug_rd, debug_wr, debug_split0, debug_split1; - - // //////////////////////////////////////////////////////////////////// - // TX Data Path - - wire [18:0] tx19_data; - wire tx19_src_rdy, tx19_dst_rdy; - wire [35:0] tx36_data; - wire tx36_src_rdy, tx36_dst_rdy; - - wire [18:0] ctrl_data; - wire ctrl_src_rdy, ctrl_dst_rdy; - - gpif_wr gpif_wr - (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst), - .gpif_data(gpif_d), .gpif_wr(WR), .gpif_ep(EP), - .gpif_full_d(DF), .gpif_full_c(CF), - - .sys_clk(fifo_clk), .sys_rst(fifo_rst), - .data_o(tx19_data), .src_rdy_o(tx19_src_rdy), .dst_rdy_i(tx19_dst_rdy), - .ctrl_o(ctrl_data), .ctrl_src_rdy_o(ctrl_src_rdy), .ctrl_dst_rdy_i(ctrl_dst_rdy), - .debug(debug_wr) ); - - // join vita packets which are longer than one frame, drop frame padding - wire [18:0] refr_data; - wire refr_src_rdy, refr_dst_rdy; - - packet_reframer tx_packet_reframer - (.clk(fifo_clk), .reset(fifo_rst), .clear(clear_tx), - .data_i(tx19_data), .src_rdy_i(tx19_src_rdy), .dst_rdy_o(tx19_dst_rdy), - .data_o(refr_data), .src_rdy_o(refr_src_rdy), .dst_rdy_i(refr_dst_rdy)); - - fifo19_to_fifo36 #(.LE(1)) f19_to_f36 - (.clk(fifo_clk), .reset(fifo_rst), .clear(0), - .f19_datain(refr_data), .f19_src_rdy_i(refr_src_rdy), .f19_dst_rdy_o(refr_dst_rdy), - .f36_dataout(tx36_data), .f36_src_rdy_o(tx36_src_rdy), .f36_dst_rdy_i(tx36_dst_rdy)); - - fifo_cascade #(.WIDTH(36), .SIZE(TXFIFOSIZE)) tx_fifo36 - (.clk(fifo_clk), .reset(fifo_rst), .clear(clear_tx), - .datain(tx36_data), .src_rdy_i(tx36_src_rdy), .dst_rdy_o(tx36_dst_rdy), - .dataout(tx_data_o), .src_rdy_o(tx_src_rdy_o), .dst_rdy_i(tx_dst_rdy_i)); - - // //////////////////////////////////////////// - // RX Data Path - - wire [35:0] rx36_data; - wire rx36_src_rdy, rx36_dst_rdy; - wire [18:0] rx19_data, splt_data; - wire rx19_src_rdy, rx19_dst_rdy, splt_src_rdy, splt_dst_rdy; - wire [18:0] resp_data, resp_int1, resp_int2; - wire resp_src_rdy, resp_dst_rdy; - wire resp_src_rdy_int1, resp_dst_rdy_int1, resp_src_rdy_int2, resp_dst_rdy_int2; - - fifo_cascade #(.WIDTH(36), .SIZE(RXFIFOSIZE)) rx_fifo36 - (.clk(fifo_clk), .reset(fifo_rst), .clear(clear_rx), - .datain(rx_data_i), .src_rdy_i(rx_src_rdy_i), .dst_rdy_o(rx_dst_rdy_o), - .dataout(rx36_data), .src_rdy_o(rx36_src_rdy), .dst_rdy_i(rx36_dst_rdy)); - - fifo36_to_fifo19 #(.LE(1)) f36_to_f19 - (.clk(fifo_clk), .reset(fifo_rst), .clear(clear_rx), - .f36_datain(rx36_data), .f36_src_rdy_i(rx36_src_rdy), .f36_dst_rdy_o(rx36_dst_rdy), - .f19_dataout(rx19_data), .f19_src_rdy_o(rx19_src_rdy), .f19_dst_rdy_i(rx19_dst_rdy) ); - - packet_splitter #(.FRAME_LEN(256)) packet_splitter - (.clk(fifo_clk), .reset(fifo_rst), .clear(clear_rx), - .frames_per_packet(frames_per_packet), - .data_i(rx19_data), .src_rdy_i(rx19_src_rdy), .dst_rdy_o(rx19_dst_rdy), - .data_o(splt_data), .src_rdy_o(splt_src_rdy), .dst_rdy_i(splt_dst_rdy), - .debug0(debug_split0), .debug1(debug_split1)); - - gpif_rd gpif_rd - (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst), - .gpif_data(gpif_d_out), .gpif_rd(RD), .gpif_ep(EP), - .gpif_empty_d(DE), .gpif_empty_c(CE), .gpif_flush(gpif_misc[0]), - - .sys_clk(fifo_clk), .sys_rst(fifo_rst), - .data_i(splt_data), .src_rdy_i(splt_src_rdy), .dst_rdy_o(splt_dst_rdy), - .resp_i(resp_data), .resp_src_rdy_i(resp_src_rdy), .resp_dst_rdy_o(resp_dst_rdy), - .debug(debug_rd) ); - - // //////////////////////////////////////////////////////////////////// - // FIFO to Wishbone interface - - fifo_to_wb fifo_to_wb - (.clk(fifo_clk), .reset(fifo_rst), .clear(0), - .data_i(ctrl_data), .src_rdy_i(ctrl_src_rdy), .dst_rdy_o(ctrl_dst_rdy), - .data_o(resp_int1), .src_rdy_o(resp_src_rdy_int1), .dst_rdy_i(resp_dst_rdy_int1), - .wb_adr_o(wb_adr_o), .wb_dat_mosi(wb_dat_mosi), .wb_dat_miso(wb_dat_miso), .wb_sel_o(wb_sel_o), - .wb_cyc_o(wb_cyc_o), .wb_stb_o(wb_stb_o), .wb_we_o(wb_we_o), .wb_ack_i(wb_ack_i), - .triggers(triggers), - .debug0(), .debug1()); - - wire [18:0] tx_err19_data; - wire tx_err19_src_rdy, tx_err19_dst_rdy; - - fifo36_to_fifo19 #(.LE(1)) f36_to_f19_txerr - (.clk(fifo_clk), .reset(fifo_rst), .clear(clear_rx), - .f36_datain(tx_err_data_i), .f36_src_rdy_i(tx_err_src_rdy_i), .f36_dst_rdy_o(tx_err_dst_rdy_o), - .f19_dataout(tx_err19_data), .f19_src_rdy_o(tx_err19_src_rdy), .f19_dst_rdy_i(tx_err19_dst_rdy) ); - - fifo19_mux #(.prio(0)) mux_err_stream - (.clk(wb_clk), .reset(wb_rst), .clear(0), - .data0_i(resp_int1), .src0_rdy_i(resp_src_rdy_int1), .dst0_rdy_o(resp_dst_rdy_int1), - .data1_i(tx_err19_data), .src1_rdy_i(tx_err19_src_rdy), .dst1_rdy_o(tx_err19_dst_rdy), - .data_o(resp_int2), .src_rdy_o(resp_src_rdy_int2), .dst_rdy_i(resp_dst_rdy_int2)); - - fifo19_pad #(.LENGTH(16)) fifo19_pad - (.clk(fifo_clk), .reset(fifo_rst), .clear(0), - .data_i(resp_int2), .src_rdy_i(resp_src_rdy_int2), .dst_rdy_o(resp_dst_rdy_int2), - .data_o(resp_data), .src_rdy_o(resp_src_rdy), .dst_rdy_i(resp_dst_rdy)); - - // //////////////////////////////////////////// - // DEBUG - - //assign debug0 = { rx19_src_rdy, rx19_dst_rdy, resp_src_rdy, resp_dst_rdy, gpif_ctl[3:0], gpif_rdy[3:0], - // gpif_d_copy[15:0] }; - - //assign debug1 = { { debug_rd[15:8] }, - // { debug_rd[7:0] }, - // { rx_src_rdy_i, rx_dst_rdy_o, rx36_src_rdy, rx36_dst_rdy, rx19_src_rdy, rx19_dst_rdy, resp_src_rdy, resp_dst_rdy}, - // { tx_src_rdy_o, tx_dst_rdy_i, tx19_src_rdy, tx19_dst_rdy, tx36_src_rdy, tx36_dst_rdy, ctrl_src_rdy, ctrl_dst_rdy} }; - - assign debug0 = { gpif_ctl[3:0], gpif_rdy[3:0], debug_split0[23:0] }; - assign debug1 = { gpif_misc[0], debug_rd[14:0], debug_split1[15:8], debug_split1[7:0] }; -endmodule // gpif diff --git a/fpga/usrp2/gpif/gpif_rd.v b/fpga/usrp2/gpif/gpif_rd.v deleted file mode 100644 index b05c3cfb6..000000000 --- a/fpga/usrp2/gpif/gpif_rd.v +++ /dev/null @@ -1,111 +0,0 @@ -// -// 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 gpif_rd - (input gpif_clk, input gpif_rst, - output [15:0] gpif_data, input gpif_rd, input gpif_ep, - output reg gpif_empty_d, output reg gpif_empty_c, - output reg gpif_flush, - - input sys_clk, input sys_rst, - input [18:0] data_i, input src_rdy_i, output dst_rdy_o, - input [18:0] resp_i, input resp_src_rdy_i, output resp_dst_rdy_o, - output [31:0] debug - ); - - wire [18:0] data_o; // occ bit indicates flush - wire [17:0] resp_o; // no occ bit - wire final_rdy_data, final_rdy_resp; - - // 33/257 Bug Fix - reg [8:0] read_count; - always @(negedge gpif_clk) - if(gpif_rst) - read_count <= 0; - else if(gpif_rd) - read_count <= read_count + 1; - else - read_count <= 0; - - // Data Path - wire [18:0] data_int; - wire src_rdy_int, dst_rdy_int; - fifo_2clock_cascade #(.WIDTH(19), .SIZE(4)) rd_fifo_2clk - (.wclk(sys_clk), .datain(data_i[18:0]), .src_rdy_i(src_rdy_i), .dst_rdy_o(dst_rdy_o), .space(), - .rclk(~gpif_clk), .dataout(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int), .occupied(), - .arst(sys_rst)); - - reg [7:0] packet_count; - wire consume_data_line = gpif_rd & ~gpif_ep & ~read_count[8]; - wire produce_eop = src_rdy_int & dst_rdy_int & data_int[17]; - wire consume_sop = consume_data_line & final_rdy_data & data_o[16]; - wire consume_eop = consume_data_line & final_rdy_data & data_o[17]; - - fifo_cascade #(.WIDTH(19), .SIZE(10)) rd_fifo - (.clk(~gpif_clk), .reset(gpif_rst), .clear(0), - .datain(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), .space(), - .dataout(data_o), .src_rdy_o(final_rdy_data), .dst_rdy_i(consume_data_line), .occupied()); - - always @(negedge gpif_clk) - if(gpif_rst) - packet_count <= 0; - else - if(produce_eop & ~consume_sop) - packet_count <= packet_count + 1; - else if(consume_sop & ~produce_eop) - packet_count <= packet_count - 1; - - always @(negedge gpif_clk) - if(gpif_rst) - gpif_empty_d <= 1; - else - gpif_empty_d <= ~|packet_count; - - // Use occ bit to signal a gpif flush - always @(negedge gpif_clk) - if(gpif_rst) - gpif_flush <= 0; - else if(consume_eop & data_o[18]) - gpif_flush <= ~gpif_flush; - - // Response Path - wire [15:0] resp_fifolevel; - wire consume_resp_line = gpif_rd & gpif_ep & ~read_count[4]; - - fifo_2clock_cascade #(.WIDTH(18), .SIZE(4)) resp_fifo_2clk - (.wclk(sys_clk), .datain(resp_i[17:0]), .src_rdy_i(resp_src_rdy_i), .dst_rdy_o(resp_dst_rdy_o), .space(), - .rclk(~gpif_clk), .dataout(resp_o), - .src_rdy_o(final_rdy_resp), .dst_rdy_i(consume_resp_line), .occupied(resp_fifolevel), - .arst(sys_rst)); - - // FIXME -- handle short packets - - always @(negedge gpif_clk) - if(gpif_rst) - gpif_empty_c <= 1; - else - gpif_empty_c <= resp_fifolevel < 16; - - // Output Mux - assign gpif_data = gpif_ep ? resp_o[15:0] : data_o[15:0]; - - assign debug = { { 16'd0 }, - { data_int[17:16], data_o[17:16], packet_count[3:0] }, - { consume_sop, consume_eop, final_rdy_data, data_o[18], consume_data_line, consume_resp_line, src_rdy_int, dst_rdy_int} }; - -endmodule // gpif_rd diff --git a/fpga/usrp2/gpif/gpif_tb.v b/fpga/usrp2/gpif/gpif_tb.v deleted file mode 100644 index 686284c2b..000000000 --- a/fpga/usrp2/gpif/gpif_tb.v +++ /dev/null @@ -1,142 +0,0 @@ -// -// 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 gpif_tb(); - - reg sys_clk = 0; - reg sys_rst = 1; - reg gpif_clk = 0; - reg gpif_rst = 1; - - reg [15:0] gpif_data; - reg WR = 0, EP = 0; - - wire CF, DF; - - wire gpif_full_d, gpif_full_c; - wire [18:0] data_o, ctrl_o, data_splt; - wire src_rdy, dst_rdy, src_rdy_splt, dst_rdy_splt; - wire ctrl_src_rdy, ctrl_dst_rdy; - - assign ctrl_dst_rdy = 1; - - initial $dumpfile("gpif_tb.vcd"); - initial $dumpvars(0,gpif_tb); - - initial #1000 gpif_rst = 0; - initial #1000 sys_rst = 0; - always #64 gpif_clk <= ~gpif_clk; - always #47.9 sys_clk <= ~sys_clk; - - wire [18:0] data_int; - wire src_rdy_int, dst_rdy_int; - - assign dst_rdy_splt = 1; - - gpif_wr gpif_write - (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst), - .gpif_data(gpif_data), .gpif_wr(WR), .gpif_ep(EP), - .gpif_full_d(DF), .gpif_full_c(CF), - - .sys_clk(sys_clk), .sys_rst(sys_rst), - .data_o(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int), - .ctrl_o(ctrl_o), .ctrl_src_rdy_o(ctrl_src_rdy), .ctrl_dst_rdy_i(ctrl_dst_rdy) ); - - packet_reframer tx_packet_reframer - (.clk(sys_clk), .reset(sys_rst), .clear(0), - .data_i(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), - .data_o(data_o), .src_rdy_o(src_rdy), .dst_rdy_i(dst_rdy)); - - packet_splitter #(.FRAME_LEN(256)) rx_packet_splitter - (.clk(sys_clk), .reset(sys_rst), .clear(0), - .frames_per_packet(2), - .data_i(data_o), .src_rdy_i(src_rdy), .dst_rdy_o(dst_rdy), - .data_o(data_splt), .src_rdy_o(src_rdy_splt), .dst_rdy_i(dst_rdy_splt)); - - always @(posedge sys_clk) - if(ctrl_src_rdy & ctrl_dst_rdy) - $display("CTRL: %x",ctrl_o); - - always @(posedge sys_clk) - if(src_rdy_splt & dst_rdy_splt) - begin - if(data_splt[16]) - $display("<-------- DATA SOF--------->"); - $display("DATA: %x",data_splt); - if(data_splt[17]) - $display("<-------- DATA EOF--------->"); - end - - initial - begin - #10000; - repeat (1) - begin - @(posedge gpif_clk); - - WR <= 1; - gpif_data <= 256; // Length - @(posedge gpif_clk); - gpif_data <= 16'h00; - @(posedge gpif_clk); - repeat(254) - begin - gpif_data <= gpif_data + 1; - @(posedge gpif_clk); - end - WR <= 0; - - while(DF) - @(posedge gpif_clk); - repeat (16) - @(posedge gpif_clk); - - WR <= 1; - repeat(256) - begin - gpif_data <= gpif_data - 1; - @(posedge gpif_clk); - end - WR <= 0; - - -/* - while(DF) - @(posedge gpif_clk); - - repeat (20) - @(posedge gpif_clk); - WR <= 1; - gpif_data <= 16'h5; - @(posedge gpif_clk); - gpif_data <= 16'h00; - @(posedge gpif_clk); - repeat(254) - begin - gpif_data <= gpif_data - 1; - @(posedge gpif_clk); - end - WR <= 0; - */ - end - end // initial begin - - initial #200000 $finish; - - -endmodule // gpif_tb diff --git a/fpga/usrp2/gpif/gpif_wr.v b/fpga/usrp2/gpif/gpif_wr.v deleted file mode 100644 index 89fae282e..000000000 --- a/fpga/usrp2/gpif/gpif_wr.v +++ /dev/null @@ -1,95 +0,0 @@ -// -// 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 gpif_wr - (input gpif_clk, input gpif_rst, - input [15:0] gpif_data, input gpif_wr, input gpif_ep, - output reg gpif_full_d, output reg gpif_full_c, - - input sys_clk, input sys_rst, - output [18:0] data_o, output src_rdy_o, input dst_rdy_i, - output [18:0] ctrl_o, output ctrl_src_rdy_o, input ctrl_dst_rdy_i, - output [31:0] debug ); - - reg wr_reg, ep_reg; - reg [15:0] gpif_data_reg; - - always @(posedge gpif_clk) - begin - ep_reg <= gpif_ep; - wr_reg <= gpif_wr; - gpif_data_reg <= gpif_data; - end - - reg [9:0] write_count; - - always @(posedge gpif_clk) - if(gpif_rst) - write_count <= 0; - else if(wr_reg) - write_count <= write_count + 1; - else - write_count <= 0; - - reg sop; - wire eop = (write_count == 255); - wire eop_ctrl = (write_count == 15); - - always @(posedge gpif_clk) - sop <= gpif_wr & ~wr_reg; - - // Data Path - wire [15:0] fifo_space; - always @(posedge gpif_clk) - if(gpif_rst) - gpif_full_d <= 1; - else - gpif_full_d <= fifo_space < 256; - - wire [17:0] data_int; - wire src_rdy_int, dst_rdy_int; - - fifo_cascade #(.WIDTH(18), .SIZE(10)) wr_fifo - (.clk(gpif_clk), .reset(gpif_rst), .clear(0), - .datain({eop,sop,gpif_data_reg}), .src_rdy_i(~ep_reg & wr_reg & ~write_count[8]), .dst_rdy_o(), .space(fifo_space), - .dataout(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int), .occupied()); - - fifo_2clock_cascade #(.WIDTH(18), .SIZE(4)) wr_fifo_2clk - (.wclk(gpif_clk), .datain(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), .space(), - .rclk(sys_clk), .dataout(data_o[17:0]), .src_rdy_o(src_rdy_o), .dst_rdy_i(dst_rdy_i), .occupied(), - .arst(sys_rst)); - assign data_o[18] = 1'b0; - - // Control Path - wire [15:0] ctrl_fifo_space; - always @(posedge gpif_clk) - if(gpif_rst) - gpif_full_c <= 1; - else - gpif_full_c <= ctrl_fifo_space < 16; - - fifo_2clock_cascade #(.WIDTH(19), .SIZE(4)) ctrl_fifo_2clk - (.wclk(gpif_clk), .datain({1'b0,eop_ctrl,sop,gpif_data_reg}), - .src_rdy_i(ep_reg & wr_reg & ~write_count[4]), .dst_rdy_o(), .space(ctrl_fifo_space), - .rclk(sys_clk), .dataout(ctrl_o[18:0]), - .src_rdy_o(ctrl_src_rdy_o), .dst_rdy_i(ctrl_dst_rdy_i), .occupied(), - .arst(sys_rst)); - - assign debug = { 16'd0, ep_reg, wr_reg, eop, sop, (~ep_reg & wr_reg & ~write_count[8]), src_rdy_int, dst_rdy_int, write_count[8:0]}; - -endmodule // gpif_wr diff --git a/fpga/usrp2/gpif/gpif_wr_tb.v b/fpga/usrp2/gpif/gpif_wr_tb.v deleted file mode 100644 index 171bb96a1..000000000 --- a/fpga/usrp2/gpif/gpif_wr_tb.v +++ /dev/null @@ -1,110 +0,0 @@ -// -// 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 gpif_wr_tb(); - - reg sys_clk = 0; - reg sys_rst = 1; - reg gpif_clk = 0; - reg gpif_rst = 1; - - reg [15:0] gpif_data; - reg WR = 0, EP = 0; - - wire CF, DF; - - wire gpif_full_d, gpif_full_c; - wire [18:0] data_o, ctrl_o; - wire src_rdy, dst_rdy; - wire ctrl_src_rdy, ctrl_dst_rdy; - - assign ctrl_dst_rdy = 1; - assign dst_rdy = 1; - - initial $dumpfile("gpif_wr_tb.vcd"); - initial $dumpvars(0,gpif_wr_tb); - - initial #1000 gpif_rst = 0; - initial #1000 sys_rst = 0; - always #64 gpif_clk <= ~gpif_clk; - always #47.9 sys_clk <= ~sys_clk; - - wire [18:0] data_int; - wire src_rdy_int, dst_rdy_int; - - gpif_wr gpif_write - (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst), - .gpif_data(gpif_data), .gpif_wr(WR), .gpif_ep(EP), - .gpif_full_d(DF), .gpif_full_c(CF), - - .sys_clk(sys_clk), .sys_rst(sys_rst), - .data_o(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int), - .ctrl_o(ctrl_o), .ctrl_src_rdy_o(ctrl_src_rdy), .ctrl_dst_rdy_i(ctrl_dst_rdy) ); - - packet_reframer tx_packet_reframer - (.clk(sys_clk), .reset(sys_rst), .clear(0), - .data_i(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), - .data_o(data_o), .src_rdy_o(src_rdy), .dst_rdy_i(dst_rdy)); - - always @(posedge sys_clk) - if(ctrl_src_rdy & ctrl_dst_rdy) - $display("CTRL: %x",ctrl_o); - - always @(posedge sys_clk) - if(src_rdy & dst_rdy) - begin - if(data_o[16]) - $display("<-------- DATA SOF--------->"); - $display("DATA: %x",data_o); - if(data_o[17]) - $display("<-------- DATA EOF--------->"); - end - - initial - begin - #10000; - repeat (1) - begin - WR <= 1; - gpif_data <= 10; // Length - @(posedge gpif_clk); - gpif_data <= 16'h00; - @(posedge gpif_clk); - repeat(254) - begin - gpif_data <= gpif_data + 1; - @(posedge gpif_clk); - end - WR <= 0; - repeat (20) - @(posedge gpif_clk); - WR <= 1; - gpif_data <= 16'h5; - @(posedge gpif_clk); - repeat(254) - begin - gpif_data <= gpif_data - 1; - @(posedge gpif_clk); - end - end - end // initial begin - - initial #100000 $finish; - - -endmodule // gpif_wr_tb diff --git a/fpga/usrp2/gpif/lint b/fpga/usrp2/gpif/lint deleted file mode 100755 index 4316c89a9..000000000 --- a/fpga/usrp2/gpif/lint +++ /dev/null @@ -1,2 +0,0 @@ -iverilog -Wall -y . -y ../fifo/ -y ../control_lib/ -y ../models/ -y ../coregen/ -y ../simple_gemac/ -y ../sdr_lib/ -y ../vrt/ gpif.v 2>&1 | grep -v coregen | grep -v models - diff --git a/fpga/usrp2/gpif/packet_splitter.v b/fpga/usrp2/gpif/packet_splitter.v deleted file mode 100644 index ba4c8cded..000000000 --- a/fpga/usrp2/gpif/packet_splitter.v +++ /dev/null @@ -1,123 +0,0 @@ -// -// 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/>. -// - - -// Split vita packets longer than one GPIF frame, add padding on short frames - -module packet_splitter - #(parameter FRAME_LEN=256) - (input clk, input reset, input clear, - input [7:0] frames_per_packet, - input [18:0] data_i, - input src_rdy_i, - output dst_rdy_o, - output [18:0] data_o, - output src_rdy_o, - input dst_rdy_i, - output [31:0] debug0, - output [31:0] debug1); - - reg [1:0] state; - reg [15:0] length; - reg [15:0] frame_len; - reg [7:0] frame_count; - - localparam PS_IDLE = 0; - localparam PS_FRAME = 1; - localparam PS_NEW_FRAME = 2; - localparam PS_PAD = 3; - - wire eof_i = data_i[17]; - - always @(posedge clk) - if(reset | clear) - begin - state <= PS_IDLE; - frame_count <= 0; - end - else - case(state) - PS_IDLE : - if(src_rdy_i & dst_rdy_i) - begin - length <= { data_i[14:0],1'b0}; - frame_len <= FRAME_LEN; - state <= PS_FRAME; - frame_count <= 1; - end - PS_FRAME : - if(src_rdy_i & dst_rdy_i) - if((frame_len == 2) & ((length == 2) | eof_i)) - state <= PS_IDLE; - else if(frame_len == 2) - begin - length <= length - 1; - state <= PS_NEW_FRAME; - frame_count <= frame_count + 1; - end - else if((length == 2)|eof_i) - begin - frame_len <= frame_len - 1; - state <= PS_PAD; - end - else - begin - frame_len <= frame_len - 1; - length <= length - 1; - end - PS_NEW_FRAME : - if(src_rdy_i & dst_rdy_i) - begin - frame_len <= FRAME_LEN; - if((length == 2)|eof_i) - state <= PS_PAD; - else - begin - state <= PS_FRAME; - length <= length - 1; - end // else: !if((length == 2)|eof_i) - end // if (src_rdy_i & dst_rdy_i) - - PS_PAD : - if(dst_rdy_i) - if(frame_len == 2) - state <= PS_IDLE; - else - frame_len <= frame_len - 1; - - endcase // case (state) - - wire next_state_is_idle = dst_rdy_i & (frame_len==2) & - ( (state==PS_PAD) | ( (state==PS_FRAME) & src_rdy_i & ((length==2)|eof_i) ) ); - - - - - assign dst_rdy_o = dst_rdy_i & (state != PS_PAD); - assign src_rdy_o = src_rdy_i | (state == PS_PAD); - - wire eof_out = (frame_len == 2) & (state != PS_IDLE) & (state != PS_NEW_FRAME); - wire sof_out = (state == PS_IDLE) | (state == PS_NEW_FRAME); - wire occ_out = eof_out & next_state_is_idle & (frames_per_packet != frame_count); - - wire [15:0] data_out = data_i[15:0]; - assign data_o = {occ_out, eof_out, sof_out, data_out}; - - assign debug0 = { 8'd0, dst_rdy_o, src_rdy_o, next_state_is_idle, eof_out, sof_out, occ_out, state[1:0], frame_count[7:0], frames_per_packet[7:0] }; - assign debug1 = { length[15:0], frame_len[15:0] }; - -endmodule // packet_splitter diff --git a/fpga/usrp2/gpif/packet_splitter_tb.v b/fpga/usrp2/gpif/packet_splitter_tb.v deleted file mode 100644 index 329b58e0d..000000000 --- a/fpga/usrp2/gpif/packet_splitter_tb.v +++ /dev/null @@ -1,137 +0,0 @@ -// -// 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 packet_splitter_tb(); - - reg sys_clk = 0; - reg sys_rst = 1; - reg gpif_clk = 0; - reg gpif_rst = 1; - - reg [15:0] gpif_data; - reg WR = 0, EP = 0; - - wire CF, DF; - - wire gpif_full_d, gpif_full_c; - wire [18:0] data_o, ctrl_o, data_splt; - wire src_rdy, dst_rdy, src_rdy_splt, dst_rdy_splt; - wire ctrl_src_rdy, ctrl_dst_rdy; - - assign ctrl_dst_rdy = 1; - - initial $dumpfile("packet_splitter_tb.vcd"); - initial $dumpvars(0,packet_splitter_tb); - - initial #1000 gpif_rst = 0; - initial #1000 sys_rst = 0; - always #64 gpif_clk <= ~gpif_clk; - always #47.9 sys_clk <= ~sys_clk; - - wire [35:0] data_int; - wire src_rdy_int, dst_rdy_int; - - assign dst_rdy_splt = 1; - - vita_pkt_gen vita_pkt_gen - (.clk(sys_clk), .reset(sys_rst) , .clear(0), - .len(512),.data_o(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int)); - - fifo36_to_fifo19 #(.LE(1)) f36_to_f19 - (.clk(sys_clk), .reset(sys_rst), .clear(0), - .f36_datain(data_int), .f36_src_rdy_i(src_rdy_int), .f36_dst_rdy_o(dst_rdy_int), - .f19_dataout(data_o), .f19_src_rdy_o(src_rdy), .f19_dst_rdy_i(dst_rdy)); - - packet_splitter #(.FRAME_LEN(13)) rx_packet_splitter - (.clk(sys_clk), .reset(sys_rst), .clear(0), - .frames_per_packet(4), - .data_i(data_o), .src_rdy_i(src_rdy), .dst_rdy_o(dst_rdy), - .data_o(data_splt), .src_rdy_o(src_rdy_splt), .dst_rdy_i(dst_rdy_splt)); - - always @(posedge sys_clk) - if(ctrl_src_rdy & ctrl_dst_rdy) - $display("CTRL: %x",ctrl_o); - - always @(posedge sys_clk) - if(src_rdy_splt & dst_rdy_splt) - begin - if(data_splt[16]) - $display("<-------- DATA SOF--------->"); - $display("DATA: %x",data_splt); - if(data_splt[17]) - $display("<-------- DATA EOF--------->"); - end - - initial - begin - #10000; - repeat (1) - begin - @(posedge gpif_clk); - - WR <= 1; - gpif_data <= 256; // Length - @(posedge gpif_clk); - gpif_data <= 16'h00; - @(posedge gpif_clk); - repeat(254) - begin - gpif_data <= gpif_data + 1; - @(posedge gpif_clk); - end - WR <= 0; - - while(DF) - @(posedge gpif_clk); - repeat (16) - @(posedge gpif_clk); - - WR <= 1; - repeat(256) - begin - gpif_data <= gpif_data - 1; - @(posedge gpif_clk); - end - WR <= 0; - - -/* - while(DF) - @(posedge gpif_clk); - - repeat (20) - @(posedge gpif_clk); - WR <= 1; - gpif_data <= 16'h5; - @(posedge gpif_clk); - gpif_data <= 16'h00; - @(posedge gpif_clk); - repeat(254) - begin - gpif_data <= gpif_data - 1; - @(posedge gpif_clk); - end - WR <= 0; - */ - end - end // initial begin - - initial #200000 $finish; - - -endmodule // packet_splitter_tb diff --git a/fpga/usrp2/gpif/slave_fifo.v b/fpga/usrp2/gpif/slave_fifo.v index e75f28913..d1a0a027b 100644 --- a/fpga/usrp2/gpif/slave_fifo.v +++ b/fpga/usrp2/gpif/slave_fifo.v @@ -84,7 +84,7 @@ module slave_fifo reg tx_data_enough_space; reg [9:0] transfer_count; //number of lines (a line is 16 bits) in active transfer - + reg pktend_latch; reg [3:0] state; //state machine current state @@ -106,12 +106,29 @@ module slave_fifo localparam BUS_HOG_RX = 0; localparam BUS_HOG_TX = 1; + //count the number of cycles since RX data so we can force a flush + reg [17:0] non_rx_cycles; + localparam rx_idle_flush_cycles = 65536; //about 1ms at 64MHz clock + always @(posedge gpif_clk) begin + if(gpif_rst || state == STATE_DATA_RX || state == STATE_PKTEND) + non_rx_cycles <= 0; + else if (non_rx_cycles != rx_idle_flush_cycles) + non_rx_cycles <= non_rx_cycles + 1; + end + + //when should we flush aka pktend? + //pktend_latch tells us that its ok to flush -> we just had an RX xfer with EOF + //the RX DSP not running or a cycle counter gives us the flushing response dynamic + wire rx_data_flush = (~dsp_rx_run || non_rx_cycles == rx_idle_flush_cycles) && pktend_latch; + // ////////////////////////////////////////////////////////////// // FX2 slave FIFO bus master state machine // always @(posedge gpif_clk) - if(gpif_rst) + if(gpif_rst) begin state <= STATE_IDLE; + pktend_latch <= 0; + end else begin case (state) @@ -131,11 +148,8 @@ module slave_fifo state <= STATE_DATA_TX_SLOE; else if(data_rx_src_rdy & ~FX2_DF) state <= STATE_DATA_RX_ADR; - else if(~data_rx_src_rdy & ~dsp_rx_run & pktend_latch & ~FX2_DF) + else if(rx_data_flush & ~FX2_DF) state <= STATE_PKTEND_ADR; - - if(data_rx_src_rdy) - pktend_latch <= 1; end STATE_DATA_TX_SLOE: //just to assert SLOE one cycle before SLRD @@ -150,8 +164,10 @@ module slave_fifo STATE_DATA_RX: begin - if(data_rx_src_rdy && data_rx_dst_rdy) + if(data_rx_src_rdy && data_rx_dst_rdy) begin transfer_count <= transfer_count + 1; + pktend_latch <= gpif_d_out_data[17]; //ok to do pkt end when we complete with EOF + end else state <= STATE_IDLE; last_data_bus_hog <= BUS_HOG_RX; @@ -294,7 +310,7 @@ module slave_fifo wire [15:0] rxfifospace; //deep 36 bit wide input fifo buffers from DSP - fifo_cascade #(.WIDTH(36), .SIZE(8)) rx_fifo36 + fifo_cascade #(.WIDTH(36), .SIZE(9)) rx_fifo36 (.clk(fifo_clk), .reset(fifo_rst), .clear(clear_rx), .datain(rx_data_i), .src_rdy_i(rx_src_rdy_i), .dst_rdy_o(rx_dst_rdy_o), .dataout(rx36_data), .src_rdy_o(rx36_src_rdy), .dst_rdy_i(rx36_dst_rdy)); @@ -314,9 +330,9 @@ module slave_fifo .arst(fifo_rst)); //rd_fifo buffers writes to the 2clock fifo above - fifo_cascade #(.WIDTH(16), .SIZE(RXFIFOSIZE)) rd_fifo + fifo_cascade #(.WIDTH(18), .SIZE(RXFIFOSIZE)) rd_fifo (.clk(~gpif_clk), .reset(gpif_rst), .clear(clear_rx), - .datain(data_rx_int), .src_rdy_i(rx_src_rdy_int), .dst_rdy_o(rx_dst_rdy_int), .space(rxfifospace), + .datain(data_rx_int[17:0]), .src_rdy_i(rx_src_rdy_int), .dst_rdy_o(rx_dst_rdy_int), .space(rxfifospace), .dataout(gpif_d_out_data), .src_rdy_o(data_rx_src_rdy), .dst_rdy_i(data_rx_dst_rdy), .occupied()); // //////////////////////////////////////////////////////////////////// |