21点游戏用verilog怎么做

21点游戏是一种纸牌游戏，也称为Blackjack。要实现这个游戏，您需要使用Verilog编写游戏逻辑。下面是一个简单的21点游戏的Verilog代码示例：

module blackjack (
    input clk, //时钟信号
    input reset, //复位信号
    input hit, //是否要求加牌
    input stay, //是否要求停牌
    output reg[7:0] player_hand, //玩家手牌总和
    output reg[7:0] dealer_hand, //庄家手牌总和
    output reg win //是否赢得游戏
);

reg[7:0] deck [51:0]; //扑克牌
reg[7:0] player_cards [4:0]; //玩家手牌
reg[7:0] dealer_cards [4:0]; //庄家手牌
reg[3:0] player_card_count; //玩家手牌数量
reg[3:0] dealer_card_count; //庄家手牌数量
reg game_over; //游戏是否结束
reg[7:0] player_hand_tmp; //玩家手牌总和临时值
reg[7:0] dealer_hand_tmp; //庄家手牌总和临时值

initial begin
    //初始化扑克牌
    deck[0] = 2'b00_000_001; //2 of spades
    deck[1] = 2'b00_000_010; //3 of spades
    //...
    deck[50] = 2'b10_000_110; //ace of diamonds
    deck[51] = 2'b10_000_111; //2 of diamonds
    
    //初始化游戏状态
    player_hand = 0;
    dealer_hand = 0;
    player_card_count = 0;
    dealer_card_count = 0;
    game_over = 0;
end

always @(posedge clk) begin
    if (reset) begin
        //重置游戏状态
        player_hand = 0;
        dealer_hand = 0;
        player_card_count = 0;
        dealer_card_count = 0;
        game_over = 0;
    end else begin
        //判断是否需要给玩家发牌
        if (player_card_count < 2) begin
            player_cards[player_card_count] = deck[player_card_count];
            player_card_count = player_card_count + 1;
        end
        //判断是否需要给庄家发牌
        if (dealer_card_count < 2) begin
            dealer_cards[dealer_card_count] = deck[dealer_card_count + 2];
            dealer_card_count = dealer_card_count + 1;
        end
        //判断是否需要加牌
        if (hit) begin
            player_cards[player_card_count] = deck[player_card_count + dealer_card_count + 1];
            player_card_count = player_card_count + 1;
        end
        //计算玩家手牌总和
        player_hand_tmp = 0;
        for (int i = 0; i < player_card_count; i = i + 1) begin
            player_hand_tmp = player_hand_tmp + player_cards[i][6:0];
        end
        player_hand = player_hand_tmp;
        //计算庄家手牌总和
        dealer_hand_tmp = 0;
        for (int i = 0; i < dealer_card_count; i = i + 1) begin
            dealer_hand_tmp = dealer_hand_tmp + dealer_cards[i][6:0];
        end
        dealer_hand = dealer_hand_tmp;
        //判断是否要停牌
        if (stay) begin
            //庄家加牌
            while (dealer_hand < 17) begin
                dealer_cards[dealer_card_count] = deck[player_card_count + dealer_card_count + 1];
                dealer_card_count = dealer_card_count + 1;
                dealer_hand_tmp = dealer_hand_tmp + dealer_cards[dealer_card_count][6:0];
            end
            dealer_hand = dealer_hand_tmp;
            //判断胜负
            if (dealer_hand > 21 || player_hand > dealer_hand) begin
                win = 1;
                game_over = 1;
            end else begin
                win = 0;
                game_over = 1;
            end
        end
    end
end

这个代码示例实现了一个简单的21点游戏逻辑，包括发牌、加牌、停牌、计算总和和判断胜负等功能。在这个示例中，使用了一个简单的扑克牌数组来表示所有的扑克牌，并使用了玩家手牌、庄家手牌和游戏状态等变量来跟踪游戏状态。您可以根据自己的需要修改和扩展这个代码示例，以实现更复杂的21点游戏逻辑。