标签: 0633747

ba_0633747八音自动播放电子琴设计--文件名：top.vhd--功能：顶层文件--最后修改日期：2005/04/10libraryIEEE;useIEEE.STD_LOGIC_1164.ALL;useIEEE.STD_LOGIC_ARITH.ALL;useIEEE.STD_LOGIC_UNSIGNED.ALL;entitymusictopisPort(clk4Hz,clk28khz:instd_logic;--系统时钟handTOauto:instd_logic;--键盘输入/自动演奏code1:outstd_logic_vector(6downto0);--音符显示信号index1:instd_logic_vector(7downto0);--键盘输入信号high1:outstd_logic;--高低音节信号spkout:outstd_logic);--音频信号endmusictop;architectureBehavioralofmusictopiscomponentautomusicPort(clk:instd_logic;Auto:instd_logic;index2:instd_logic_vector(7downto0);index0:outstd_logic_vector(7downto0));endcomponent;componenttonePort(index:instd_logic_vector(7downto0);code:outstd_logic_vector(6downto0);high:outstd_logic;tone0:outintegerrange……