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-rw-r--r--serdes/serdes_tx.v39
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;