diff options
Diffstat (limited to 'serdes/serdes_tx.v')
-rw-r--r-- | serdes/serdes_tx.v | 39 |
1 files changed, 14 insertions, 25 deletions
diff --git a/serdes/serdes_tx.v b/serdes/serdes_tx.v index fa4abe5df..b6f19370e 100644 --- a/serdes/serdes_tx.v +++ b/serdes/serdes_tx.v @@ -33,11 +33,9 @@ module serdes_tx // TX Stream Interface input [31:0] rd_dat_i, - output rd_read_o, - output rd_done_o, - output rd_error_o, - input rd_sop_i, - input rd_eop_i, + input [3:0] rd_flags_i, + output rd_ready_o, + input rd_ready_i, // Flow control interface input inhibit_tx, @@ -82,33 +80,24 @@ module serdes_tx wire sop_o, eop_o, write, full, read, empty; wire [31:0] data_o; reg xfer_active; + + wire rd_sop_i = rd_flags_i[0]; + wire rd_eop_i = rd_flags_i[1]; + wire [1:0] rd_occ_i = rd_flags_i[3:2]; // Unused cascadefifo2 #(.WIDTH(34),.SIZE(FIFOSIZE)) serdes_tx_fifo (.clk(clk),.rst(rst),.clear(0), .datain({rd_sop_i,rd_eop_i,rd_dat_i}), .write(write), .full(full), .dataout({sop_o,eop_o,data_o}), .read(read), .empty(empty), .space(), .occupied(fifo_occupied) ); - assign fifo_full = full; - assign fifo_empty = empty; - - // Buffer interface to internal FIFO - always @(posedge clk) - if(rst) - xfer_active <= 0; - else if(rd_eop_i & ~full) // In case we can't store last line right away - xfer_active <= 0; - else if(rd_sop_i) - xfer_active <= 1; - - assign write = xfer_active & ~full; - - assign rd_read_o = write; - assign rd_done_o = 0; // Always take everything we're given - assign rd_error_o = 0; // No chance for errors anticipated - - - // FIXME Implement flow control + assign fifo_full = full; + assign fifo_empty = empty; + + assign write = rd_ready_i & rd_ready_o; + assign rd_ready_o = ~full; + + // FIXME Implement flow control reg [15:0] second_word; reg [33:0] pipeline; |