diff options
| -rw-r--r-- | usrp2/control_lib/newfifo/fifo_pacer.v | 24 | ||||
| -rw-r--r-- | usrp2/top/u1e/Makefile | 1 | ||||
| -rw-r--r-- | usrp2/top/u1e/u1e_core.v | 57 |
3 files changed, 48 insertions, 34 deletions
diff --git a/usrp2/control_lib/newfifo/fifo_pacer.v b/usrp2/control_lib/newfifo/fifo_pacer.v new file mode 100644 index 000000000..1bf03ab6e --- /dev/null +++ b/usrp2/control_lib/newfifo/fifo_pacer.v @@ -0,0 +1,24 @@ + + +module fifo_pacer + (input clk, + input reset, + input [7:0] rate, + input enable, + input src1_rdy_i, output dst1_rdy_o, + output src2_rdy_o, input dst2_rdy_i, + output underrun, overrun); + + wire strobe; + + cic_strober strober (.clock(clk), .reset(reset), .enable(enable), + .rate(rate), .strobe_fast(1), .strobe_slow(strobe)); + + wire all_ready = src1_rdy_i & dst2_rdy_i; + assign dst1_rdy_o = all_ready & strobe; + assign src2_rdy_o = dst1_rdy_o; + + assign underrun = strobe & ~src1_rdy_i; + assign overrun = strobe & ~dst2_rdy_i; + +endmodule // fifo_pacer diff --git a/usrp2/top/u1e/Makefile b/usrp2/top/u1e/Makefile index 8622b8480..0277ef4f2 100644 --- a/usrp2/top/u1e/Makefile +++ b/usrp2/top/u1e/Makefile @@ -115,6 +115,7 @@ control_lib/newfifo/packet_generator.v \ control_lib/newfifo/packet_verifier.v \ control_lib/newfifo/packet_generator32.v \ control_lib/newfifo/packet_verifier32.v \ +control_lib/newfifo/fifo_pacer.v \ control_lib/longfifo.v \ control_lib/shortfifo.v \ control_lib/medfifo.v \ diff --git a/usrp2/top/u1e/u1e_core.v b/usrp2/top/u1e/u1e_core.v index 903121832..21ac97dbd 100644 --- a/usrp2/top/u1e/u1e_core.v +++ b/usrp2/top/u1e/u1e_core.v @@ -1,8 +1,7 @@ //`define LOOPBACK 1 -//`define TIMED 1 -`define CRC 1 +`define TIMED 1 module u1e_core (input clk_fpga, input rst_fpga, @@ -80,45 +79,35 @@ module u1e_core wire [7:0] rate; // TX side - wire tx_enable; - cic_strober tx_strober (.clock(wb_clk), .reset(wb_rst), .enable(tx_enable), - .rate(rate), .strobe_fast(1), .strobe_slow(tx_dst_rdy)); - - // RX side - wire rx_enable; - reg [15:0] ctr; - wire [15:0] rx_pkt_len = 480; - wire rx_eof = (ctr == rx_pkt_len); - wire rx_sof = (ctr == 0); + wire tx_enable, tx_src_rdy_int, tx_dst_rdy_int; - cic_strober rx_strober (.clock(wb_clk), .reset(wb_rst), .enable(rx_enable), - .rate(rate), .strobe_fast(1), .strobe_slow(rx_src_rdy)); + fifo_pacer tx_pacer + (.clk(wb_clk), .reset(wb_rst), .rate(rate), .enable(tx_enable), + .src1_rdy_i(tx_src_rdy), .dst1_rdy_o(tx_dst_rdy), + .src2_rdy_o(tx_src_rdy_int), .dst2_rdy_i(tx_dst_rdy_int), + .underrun(tx_underrun), .overrun()); - always @(posedge wb_clk) - if(wb_rst) - ctr <= 0; - else if(rx_dst_rdy & rx_src_rdy) - if(ctr == rx_pkt_len) - ctr <= 0; - else - ctr <= ctr + 1; - - assign rx_data = {2'b00,rx_eof,rx_sof,~ctr,ctr}; -`endif // TIMED - -`ifdef CRC - packet_generator32 pktgen32 - (.clk(wb_clk), .reset(wb_rst), .clear(clear), - .data_o(rx_data), .src_rdy_o(rx_src_rdy), .dst_rdy_i(rx_dst_rdy)); - packet_verifier32 pktver32 (.clk(wb_clk), .reset(wb_rst), .clear(clear), - .data_i(tx_data), .src_rdy_i(tx_src_rdy), .dst_rdy_o(tx_dst_rdy), + .data_i(tx_data), .src_rdy_i(tx_src_rdy_int), .dst_rdy_o(tx_dst_rdy_int), .total(total), .crc_err(crc_err), .seq_err(seq_err), .len_err(len_err)); + // RX side + wire rx_enable, rx_src_rdy_int, rx_dst_rdy_int; wire rx_sof = rx_data[32]; wire rx_eof = rx_data[33]; -`endif // CRC + + packet_generator32 pktgen32 + (.clk(wb_clk), .reset(wb_rst), .clear(clear), + .data_o(rx_data), .src_rdy_o(rx_src_rdy_int), .dst_rdy_i(rx_dst_rdy_int)); + + fifo_pacer rx_pacer + (.clk(wb_clk), .reset(wb_rst), .rate(rate), .enable(rx_enable), + .src1_rdy_i(rx_src_rdy_int), .dst1_rdy_o(rx_dst_rdy_int), + .src2_rdy_o(rx_src_rdy), .dst2_rdy_i(rx_dst_rdy), + .underrun(), .overrun(rx_overrun)); + +`endif // `ifdef TIMED // ///////////////////////////////////////////////////////////////////////////////////// // Wishbone Intercon, single master @@ -233,7 +222,7 @@ module u1e_core assign { debug_led[2],debug_led[0],debug_led[1] } = reg_leds; // LEDs are arranged funny on board assign { cgen_sync_b, cgen_ref_sel } = reg_cgen_ctrl; - assign { rx_overrun, tx_underrun } = 0; // reg_test; + //assign { rx_overrun, tx_underrun } = 0; // reg_test; assign s0_dat_miso = (s0_adr[6:0] == REG_LEDS) ? reg_leds : (s0_adr[6:0] == REG_SWITCHES) ? {5'b0,debug_pb[2:0],dip_sw[7:0]} : |