题解 | 游戏机计费程序

`timescale 1ns/1ns

module game_count
    (
		input rst_n, //异位复位信号，低电平有效
        input clk, 	//时钟信号
        input [9:0]money,
        input set,
		input boost,
		output reg[9:0]remain,
		output reg yellow,
		output reg red
    );
//remain信号
always@(posedge clk or negedge rst_n)
if(!rst_n)
  remain <= 0;
else if(set)
  remain <= remain + money;
else if(boost && (remain > 10'd1))
  remain <= remain-10'd2;
else if(~boost && (remain > 10'd0))
  remain <= remain-1'b1;
else
  remain <= remain;

always@(posedge clk or negedge rst_n)
if(!rst_n) begin
  yellow <= 0;
  red <= 0;
end
else begin
  yellow <=((remain >0) && (remain < 10'd10))? 1 : 0;
  red <= (((boost && (remain < 10'd2))||(~boost && (remain <1))))?1:0;
end

  
endmodule

这道题我其实做的还有点迷茫。首先就是set、boost信号是按了按钮一直保持1还是只保持一个周期。

好像是一个周期（至少set应该是这样的）。