added the basic wb<-->extram interface and a serdes interrupt to tell link status

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9746 221aa14e-8319-0410-a670-987f0aec2ac5

2 files changed, 13 insertions, 12 deletions

diff --git a/serdes/serdes.v b/serdes/serdes.v
index 81e9f2b43..8429b8fd9 100644
--- a/serdes/serdes.v
+++ b/serdes/serdes.v
@@ -16,6 +16,8 @@ module serdes
 
      output [15:0] tx_occupied, output tx_full, output tx_empty,
      output [15:0] rx_occupied, output rx_full, output rx_empty,
+
+     output serdes_link_up,
      
      output [31:0] debug0, 
      output [31:0] debug1);
@@ -40,7 +42,7 @@ module serdes
       .wr_ready_i(wr_ready_i),.wr_full_i(wr_full_i),
       .fifo_space(fifo_space), .xon_rcvd(xon_rcvd), .xoff_rcvd(xoff_rcvd),
       .fifo_occupied(rx_occupied),.fifo_full(rx_full),.fifo_empty(rx_empty),
-      .debug(debug_rx) );
+      .serdes_link_up(serdes_link_up), .debug(debug_rx) );
 
    serdes_fc_tx serdes_fc_tx
      (.clk(clk),.rst(rst),
diff --git a/serdes/serdes_rx.v b/serdes/serdes_rx.v
index bbe263b14..efcd8af2c 100644
--- a/serdes/serdes_rx.v
+++ b/serdes/serdes_rx.v
@@ -42,6 +42,7 @@ module serdes_rx
      output xon_rcvd, output xoff_rcvd,
 
      output [15:0] fifo_occupied, output fifo_full, output fifo_empty,
+     output reg serdes_link_up,
      output [31:0] debug
      );
 
@@ -336,18 +337,16 @@ module serdes_rx
 
    assign      wr_dat_o = line_o;
 
-   /*
-   assign debug = { { fifo_space[15:8] },
-		    { fifo_space[7:0] },
-		    { 2'd0, error_i, sop_i, eop_i, error_o, sop_o, eop_o },
-		    { full, empty, write, read, xfer_active, state[2:0] } };
-
-   assign      debug = { { xoff_rcvd,xon_rcvd,sop_i,eop_i,error_i,state[2:0] },
-			 { odd, wait_here, write_pre, write_d, write, full, chosen_data[17:16]},
-			 { chosen_data[15:8] },
-			 { chosen_data[7:0] } };
-   */
+   wire        slu = ~({2'b11,K_ERROR}=={ser_rkmsb,ser_rklsb,ser_r});
+   reg [3:0]   slu_reg;
+   
+   always @(posedge clk)
+     if(rst) slu_reg <= 0;
+     else slu_reg <= {slu_reg[2:0],slu};
 
+   always @(posedge clk)
+     serdes_link_up <= &slu_reg[3:1];
+   
    assign      debug = { full, empty, odd, xfer_active, sop_i, eop_i, error_i, state[2:0] };
    
 endmodule // serdes_rx