diff options
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/top/u1e/u1e_core.v | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/usrp2/top/u1e/u1e_core.v b/usrp2/top/u1e/u1e_core.v index f231791da..d5a3ddf68 100644 --- a/usrp2/top/u1e/u1e_core.v +++ b/usrp2/top/u1e/u1e_core.v @@ -58,12 +58,48 @@ module u1e_core .tx_frame_len(tx_frame_len), .rx_frame_len(rx_frame_len), .debug(debug_gpmc)); - +/* fifo_cascade #(.WIDTH(36), .SIZE(9)) loopback_fifo (.clk(wb_clk), .reset(wb_rst), .clear(0), .datain(tx_data), .src_rdy_i(tx_src_rdy), .dst_rdy_o(tx_dst_rdy), .dataout(rx_data), .src_rdy_o(rx_src_rdy), .dst_rdy_i(rx_dst_rdy)); +*/ + wire tx_strobe, rx_strobe, tx_enable, rx_enable; + wire [7:0] rate; + wire tx_fifo_rdy, rx_fifo_rdy; + + cic_strober tx_strober (.clock(wb_clk), .reset(wb_rst), .enable(tx_enable), + .rate(rate), .strobe_fast(1), .strobe_slow(tx_strobe)); + + fifo_cascade #(.WIDTH(36), .SIZE(11)) tx_fifo + (.clk(wb_clk), .reset(wb_rst), .clear(0), + .datain(tx_data), .src_rdy_i(tx_src_rdy), .dst_rdy_o(tx_dst_rdy), + .dataout(), .src_rdy_o(tx_fifo_rdy), .dst_rdy_i(tx_strobe)); + + + reg [15:0] ctr; + wire [15:0] rx_pkt_len = 480; + wire rx_eof = (ctr == rx_pkt_len); + wire rx_sof = (ctr == 0); + + cic_strober rx_strober (.clock(wb_clk), .reset(wb_rst), .enable(rx_enable), + .rate(rate), .strobe_fast(1), .strobe_slow(rx_strobe)); + + fifo_cascade #(.WIDTH(36), .SIZE(11)) rx_fifo + (.clk(wb_clk), .reset(wb_rst), .clear(0), + .datain({2'b00,rx_eof,rx_sof,16'd0,ctr}), .src_rdy_i(rx_strobe), .dst_rdy_o(rx_fifo_rdy), + .dataout(rx_data), .src_rdy_o(rx_src_rdy), .dst_rdy_i(rx_dst_rdy)); + always @(posedge wb_clk) + if(wb_rst) + ctr <= 0; + else if(rx_strobe & rx_fifo_rdy) + if(ctr == rx_pkt_len) + ctr <= 0; + else + ctr <= ctr + 1; + + // ///////////////////////////////////////////////////////////////////////////////////// // 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, @@ -136,7 +172,7 @@ module u1e_core // ///////////////////////////////////////////////////////////////////////////////////// // Slave 0, Misc LEDs, Switches, controls - reg [15:0] reg_leds, reg_cgen_ctrl, reg_test; + reg [15:0] reg_leds, reg_cgen_ctrl, reg_test, xfer_rate; localparam REG_LEDS = 7'd0; // out localparam REG_SWITCHES = 7'd2; // in @@ -145,6 +181,7 @@ module u1e_core localparam REG_TEST = 7'd8; // out localparam REG_RX_FRAMELEN = 7'd10; // out localparam REG_TX_FRAMELEN = 7'd12; // in + localparam REG_XFER_RATE = 7'd14; // in always @(posedge wb_clk) if(wb_rst) @@ -152,6 +189,8 @@ module u1e_core 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) @@ -164,7 +203,13 @@ module u1e_core 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 tx_enable = xfer_rate[15]; + assign rx_enable = xfer_rate[14]; + assign rate = xfer_rate[7:0]; 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; @@ -273,6 +318,9 @@ module u1e_core { EM_D } }; assign debug_gpio_0 = { debug_gpmc }; - assign debug_gpio_1 = { bus_error, misc_gpio[11:0] }; + assign debug_gpio_1 = { {rx_enable, rx_strobe, rx_fifo_rdy, rx_strobe & ~rx_fifo_rdy}, + {tx_enable, tx_strobe, tx_fifo_rdy, tx_strobe & ~tx_fifo_rdy}, + {rx_sof, rx_eof, rx_src_rdy, rx_dst_rdy, rx_data[33:32],2'b0}, + {3'b0, bus_error, misc_gpio[11:0]} }; endmodule // u1e_core |