diff options
Diffstat (limited to 'sdr_lib/rx_control.v')
| -rw-r--r-- | sdr_lib/rx_control.v | 39 |
1 files changed, 17 insertions, 22 deletions
diff --git a/sdr_lib/rx_control.v b/sdr_lib/rx_control.v index ae821e822..0adeb0794 100644 --- a/sdr_lib/rx_control.v +++ b/sdr_lib/rx_control.v @@ -63,22 +63,17 @@ module rx_control .read(read_ctrl), .empty(empty_ctrl) ); // Buffer interface to internal FIFO - wire write, full, read, empty; - wire sop_o, eop_o; - assign wr_flags_o = {2'b00, eop_o, sop_o}; - assign wr_ready_o = ~empty; - assign read = wr_ready_i & wr_ready_o; - - wire [33:0] fifo_line; + wire have_space, write; + wire [35:0] fifo_line; // Internal FIFO, size 9 is 2K, size 10 is 4K - cascadefifo2 #(.WIDTH(34),.SIZE(FIFOSIZE)) rxfifo - (.clk(clk),.rst(rst),.clear(clear_overrun), - .datain(fifo_line), .write(write), .full(full), - .dataout({sop_o,eop_o,wr_dat_o}), .read(read), .empty(empty), + fifo_cascade #(.WIDTH(36),.SIZE(FIFOSIZE)) rxfifo + (.clk(clk),.reset(rst),.clear(clear_overrun), + .datain(fifo_line), .src_rdy_i(write), .dst_rdy_o(have_space), + .dataout({wr_flags_o,wr_dat_o}), .src_rdy_o(wr_ready_o), .dst_rdy_i(wr_ready_i), .space(),.occupied(fifo_occupied) ); - assign fifo_full = full; - assign fifo_empty = empty; + assign fifo_full = ~have_space; + assign fifo_empty = ~wr_ready_o; // Internal FIFO to DSP interface reg [22:0] lines_left; @@ -133,13 +128,13 @@ module rx_control else if(too_late) ibs_state <= IBS_OVERRUN; IBS_FIRSTLINE : - if(full | strobe) + if(~have_space | strobe) ibs_state <= IBS_OVERRUN; else ibs_state <= IBS_RUNNING; IBS_RUNNING : if(strobe) - if(full) + if(~have_space) ibs_state <= IBS_OVERRUN; else begin @@ -165,21 +160,21 @@ module rx_control end else lines_left_frame <= lines_left_frame - 1; - end // else: !if(full) + end // else: !if(~have_space) endcase // case(ibs_state) - assign fifo_line = (ibs_state == IBS_FIRSTLINE) ? {1'b1,1'b0,master_time} : - {1'b0,((lines_left==1)|(lines_left_frame==1)),sample}; + assign fifo_line = (ibs_state == IBS_FIRSTLINE) ? {2'b0,1'b0,1'b1,master_time} : + {2'b0,((lines_left==1)|(lines_left_frame==1)),1'b0,sample}; - assign write = ((ibs_state == IBS_FIRSTLINE) | strobe) & ~full; // & (ibs_state == IBS_RUNNING) should strobe only when running + assign write = ((ibs_state == IBS_FIRSTLINE) | strobe) & have_space; // & (ibs_state == IBS_RUNNING) should strobe only when running assign overrun = (ibs_state == IBS_OVERRUN); assign run = (ibs_state == IBS_RUNNING) | (ibs_state == IBS_FIRSTLINE); assign read_ctrl = ( (ibs_state == IBS_IDLE) | - ((ibs_state == IBS_RUNNING) & strobe & ~full & (lines_left==1) & chain) ) + ((ibs_state == IBS_RUNNING) & strobe & have_space & (lines_left==1) & chain) ) & ~empty_ctrl; assign debug_rx = { 8'd0, - 1'd0, send_imm, chain, wr_ready_i,wr_ready_o, eop_o, sop_o, run, - write,full,read,empty,write_ctrl,full_ctrl,read_ctrl,empty_ctrl, + 1'd0, send_imm, chain, wr_ready_i,wr_ready_o, 2'b0, run, + write,have_space,wr_flags_o[1:0],write_ctrl,full_ctrl,read_ctrl,empty_ctrl, sc_pre1, clear_overrun, go_now, too_late, overrun, ibs_state[2:0] }; endmodule // rx_control |