openofdm/verilog/complex_mult.v

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2017-04-03 16:52:03 +00:00
module complex_mult
(
input clock,
input enable,
input reset,
input [15:0] a_i,
input [15:0] a_q,
input [15:0] b_i,
input [15:0] b_q,
input input_strobe,
output reg [31:0] p_i,
output reg [31:0] p_q,
output output_strobe
);
localparam DELAY = 4;
reg [DELAY-1:0] delay;
reg [15:0] ar;
reg [15:0] ai;
reg [15:0] br;
reg [15:0] bi;
wire [31:0] prod_i;
wire [31:0] prod_q;
complex_multiplier mult_inst (
.clk(clock),
.ar(ar),
.ai(ai),
.br(br),
.bi(bi),
.pr(prod_i),
.pi(prod_q)
);
delayT #(.DATA_WIDTH(1), .DELAY(5)) stb_delay_inst (
.clock(clock),
.reset(reset),
.data_in(input_strobe),
.data_out(output_strobe)
);
always @(posedge clock) begin
if (reset) begin
ar <= 0;
ai <= 0;
br <= 0;
bi <= 0;
p_i <= 0;
p_q <= 0;
delay <= 0;
end else if (enable) begin
ar <= a_i;
ai <= a_q;
br <= b_i;
bi <= b_q;
p_i <= prod_i;
p_q <= prod_q;
end
end
endmodule