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// Split packets from a fifo based interface so it goes out identically on two interfaces
module fifo36_splitter
(
input clk, input rst,
input [35:0] inp_data, input inp_valid, output inp_ready,
output [35:0] out0_data, output out0_valid, input out0_ready,
output [35:0] out1_data, output out1_valid, input out1_ready
);
localparam STATE_COPY_BOTH = 0;
localparam STATE_COPY_ZERO = 1;
localparam STATE_COPY_ONE = 2;
reg [1:0] state;
reg [35:0] data_reg;
assign out0_data = (state == STATE_COPY_BOTH)? inp_data : data_reg;
assign out1_data = (state == STATE_COPY_BOTH)? inp_data : data_reg;
assign out0_valid =
(state == STATE_COPY_BOTH)? inp_valid : (
(state == STATE_COPY_ZERO)? 1'b1 : (
1'b0));
assign out1_valid =
(state == STATE_COPY_BOTH)? inp_valid : (
(state == STATE_COPY_ONE)? 1'b1 : (
1'b0));
assign inp_ready = (state == STATE_COPY_BOTH)? (out0_ready | out1_ready) : 1'b0;
always @(posedge clk)
if (rst) begin
state <= STATE_COPY_BOTH;
end
else begin
case (state)
STATE_COPY_BOTH: begin
if ((out0_valid & out0_ready) & ~(out1_valid & out1_ready)) begin
state <= STATE_COPY_ONE;
end
else if (~(out0_valid & out0_ready) & (out1_valid & out1_ready)) begin
state <= STATE_COPY_ZERO;
end
data_reg <= inp_data;
end
STATE_COPY_ZERO: begin
if (out0_valid & out0_ready) begin
state <= STATE_COPY_BOTH;
end
end
STATE_COPY_ONE: begin
if (out1_valid & out1_ready) begin
state <= STATE_COPY_BOTH;
end
end
endcase //state
end
endmodule //fifo36_splitter
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