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
    );

always@(posedge clk or negedge rst_n)
begin
    if(!rst_n)
        begin
            yellow <= 1'd0 ;
            red    <= 1'd0 ;
        end
    else if(remain>=10'd10)
        begin
            yellow <= 1'd0 ;
            red    <= 1'd0 ;
        end
    else if(remain<10'd10&&remain>10'd0)
        begin
            yellow <= 1'd1 ;
            red    <= 1'd0 ;
        end
    else if(remain<10'd1)
        begin
            yellow <= 1'd0 ;
            red    <= 1'd1 ;
        end
    else
        begin
            yellow <= yellow ;
            red    <= red ;
        end
end
always@(posedge clk or negedge rst_n)
begin
    if(!rst_n)
        begin
            remain <= 10'd0 ;
        end
    else if(boost)
        begin
            if(set)
                remain <= remain + money ;
            else
                remain <= remain - 10'd2 ;
        end
    else
        begin
            if(set)
                remain <= remain + money ;
            else
                remain <= remain - 10'd1 ;
        end
end





endmodule

就这？？？