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rtl/baseball_datapath.sv

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+module baseball_datapath (
+	input logic clock,
+	input logic reset,
+
+	input logic [1:0] strike_mut_sel,
+	input logic [1:0] ball_mut_sel,
+	input logic [1:0] out_mut_sel,
+	input logic       inning_mut_sel,
+	input logic       team_toggle,
+	
+	output logic strikeout,
+	output logic walk,
+	output logic three_outs,
+	output logic game_ended,
+	
+	output logic [1:0] strike_count,
+	output logic [2:0] ball_count,
+	output logic [1:0] out_count,
+	output logic [3:0] inning_count,
+	output logic       team_active
+);
+
+	logic [1:0] strike_next;
+	logic [2:0] ball_next;
+	logic [1:0] out_next;
+	logic [3:0] inning_next;
+	logic       team_next;
+	
+	assign strikeout    = (strike_count >= 3);
+	assign walk         = (ball_count >= 4);
+	assign three_outs   = (out_count >= 3);
+	assign game_ended   = (inning_count >= 10);
+	
+	multiplexer4 #(.WIDTH(2)) strike_mut (
+		.sel(strike_mut_sel),
+		.in0(strike_count),
+		.in1('b0),
+		.in2(strike_count + 1),
+		.in3('bx),
+		.out(strike_next)
+	);
+	
+	multiplexer4 #(.WIDTH(3)) ball_mut (
+		.sel(ball_mut_sel),
+		.in0(ball_count),
+		.in1('b0),
+		.in2(ball_count + 1),
+		.in3('bx),
+		.out(ball_next)
+	);
+	
+	multiplexer4 #(.WIDTH(2)) out_mut (
+		.sel(out_mut_sel),
+		.in0(out_count),
+		.in1('b0),
+		.in2(out_count + 1),
+		.in3('bx),
+		.out(out_next)
+	);
+	
+	multiplexer2 #(.WIDTH(4)) inning_mut (
+		.sel(inning_mut_sel),
+		.in0(inning_count),
+		.in1(inning_count + 1),
+		.out(inning_next)
+	);
+	
+	multiplexer2 #(.WIDTH(1)) team_mut (
+		.sel(team_toggle),
+		.in0(team_active),
+		.in1(~team_active),
+		.out(team_next)
+	);
+	
+	register #(.WIDTH(2)) strike_register (
+		.clock(clock),
+		.reset(reset),
+		.write_en('1),
+		.next(strike_next),
+		.value(strike_count)
+	);
+	
+	register #(.WIDTH(3)) ball_register (
+		.clock(clock),
+		.reset(reset),
+		.write_en('1),
+		.next(ball_next),
+		.value(ball_count)
+	);
+	
+	register #(.WIDTH(2)) out_register (
+		.clock(clock),
+		.reset(reset),
+		.write_en('1),
+		.next(out_next),
+		.value(out_count)
+	);
+	
+	register #(.WIDTH(4), .RESET(1)) inning_register (
+		.clock(clock),
+		.reset(reset),
+		.write_en('1),
+		.next(inning_next),
+		.value(inning_count)
+	);
+	
+	register #(.WIDTH(1)) team_register (
+		.clock(clock),
+		.reset(reset),
+		.write_en('1),
+		.next(team_next),
+		.value(team_active)
+	);
+	
+endmodule