snake1(国外英语资料).docVIP

snake1(国外英语资料) 伪代码: 各种定义 architecture of snake snake _ 1 ice component 分频器 gate (clk: in std _ logic; - - 系统时钟 clk0: _ out std logic; - - 游戏控制时钟1hz clk1: _ out std logic - - 1khz分频时钟 ); than component; type all _ state ice (开始 / 复位, 游戏中, 死亡结束) signal 游戏状态, 下一状态: all _ state; 各种信号定义 begin process (clk) 状态寄存 begin if时钟上升沿到来then 游戏状态 = 下一状态 than if than process process (clk) 输出逻辑 begin if时钟上升沿到来then case游戏状态 ice when 开始 / 复位 = 显示蛇, 老鼠, 墙, 倒计时和得分的初始状态 when 游戏中 = 显示蛇和老鼠的动态, 墙的静态, 倒计时和得分 when 死亡结束 = 全屏灭, 保留显示得分, 倒计时清零 when 赢了 = 全屏亮, 保留分数, 倒计时清零 than case than if than process process (clk0) 次态逻辑 begin if游戏控制时钟的上升沿到来then case复位键状态 ice when 1 = 开始 / 复位 游戏初始化 when 0 = if撞墙then 蛇死亡, 游戏结束 else 蛇正常移动, 游戏中 case倒计时重置is when 重置 = count = 0; 倒计时重置 = 0; when 不重置 = if (count = 4) then count = 0; 倒计时状态 = 结束; else count = count + 1; 倒计时状态 = 未结束; than if; case倒计时状态 ice when 未结束 = if吃到老鼠then if分数最高then 下一状态 = 赢了 else 增加得分 than if 产生新老鼠 倒计时重置 = 1; than if when 结束 = 产生新老鼠 倒计时重置 = 1; than case case方向按键状态is when 上 = case 蛇的当前方向 ice when 下 = h1 = h1 - 1; when others = h1 = h1 + 1; 蛇的当前方向 = 上; when 下 = case 蛇的当前方向 ice when 上 = h1 = h1 + 1; when others = h1 = h1 - 1; 蛇的当前方向 = 下; when 左 = case 蛇的当前方向 ice when 右 = l1 = l1 + 1; when others = l1 = l1 - 1; 蛇的当前方向 = 左; when 右 = case 蛇的当前方向 ice when 左 = l1 = l1 - 1; when others = l1 = l1 + 1; 蛇的当前方向 = 右; when others = case 蛇的当前方向 ice when 上 = h1 = h1 + 1; when 下 = h1 = h1 - 1; when 左 = l1 = l1 - 1; when 右 = l1 = l1 + 1; than case 蛇移动 than if than case than if than process ps: 时间仓促, Game functions need to be improved, and there may be a minor problem with the mouse generation algorithm The countdown status is DTM,1ends, and0 is not over Count down count, COUNT Reset the TIM by countdown Display control C Score: SCORE Game status game_state:start start / reset, game game, dead dead end, win win Next status next_state The direction key key:, 0001, 0010, 0100 left, 1000 right The snakes current direction is dir:, 00