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Pushing the bulk of UHD-3.7.0 code.

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Original-commit: ff1546f8137f7f92bb250f685561b0c34cc0e053
This commit is contained in:
Ben Hilburn
2014-02-14 12:05:07 -08:00
parent 29086f9001
commit fbbc991a7d
2194 changed files with 1489297 additions and 1084 deletions
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lib/simple_gemac/rxmac_to_ll8.v
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//
// Copyright 2011 Ettus Research LLC
//
module rxmac_to_ll8
(input clk, input reset, input clear,
input [7:0] rx_data, input rx_valid, input rx_error, input rx_ack,
output [7:0] ll_data, output ll_sof, output ll_eof, output ll_error, output ll_src_rdy, input ll_dst_rdy );
reg [2:0] xfer_state;
localparam XFER_IDLE = 0;
localparam XFER_ACTIVE = 1;
localparam XFER_ERROR = 2;
localparam XFER_ERROR2 = 3;
localparam XFER_OVERRUN = 4;
localparam XFER_OVERRUN2 = 5;
assign ll_data = rx_data;
assign ll_src_rdy = ((rx_valid & (xfer_state != XFER_OVERRUN2) )
| (xfer_state == XFER_ERROR)
| (xfer_state == XFER_OVERRUN));
assign ll_sof = ((xfer_state==XFER_IDLE)|(xfer_state==XFER_ERROR)|(xfer_state==XFER_OVERRUN));
assign ll_eof = (rx_ack | (xfer_state==XFER_ERROR) | (xfer_state==XFER_OVERRUN));
assign ll_error = (xfer_state == XFER_ERROR)|(xfer_state==XFER_OVERRUN);
always @(posedge clk)
if(reset | clear)
xfer_state <= XFER_IDLE;
else
case(xfer_state)
XFER_IDLE :
if(rx_valid)
xfer_state <= XFER_ACTIVE;
XFER_ACTIVE :
if(rx_error)
xfer_state <= XFER_ERROR;
else if(~rx_valid)
xfer_state <= XFER_IDLE;
else if(~ll_dst_rdy)
xfer_state <= XFER_OVERRUN;
XFER_ERROR :
if(ll_dst_rdy)
xfer_state <= XFER_ERROR2;
XFER_ERROR2 :
if(~rx_error)
xfer_state <= XFER_IDLE;
XFER_OVERRUN :
if(ll_dst_rdy)
xfer_state <= XFER_OVERRUN2;
XFER_OVERRUN2 :
if(~rx_valid)
xfer_state <= XFER_IDLE;
endcase // case (xfer_state)
endmodule // rxmac_to_ll8