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名稱：音樂播放器數(shù)碼管顯示簡(jiǎn)譜蜂鳴器（代碼在文末付費(fèi)下載）

軟件：Quartus

語言：VHDL

代碼功能：

設(shè)計(jì)音樂播放器，播放一首歌，使用開發(fā)板的蜂鳴器播放音樂，使用Quartus內(nèi)的ROM IP核存儲(chǔ)音樂文件，使用數(shù)碼管顯示簡(jiǎn)譜，led顯示節(jié)奏。

簡(jiǎn)譜存儲(chǔ)在ROM中，具體值可以打開music.mif文件查看

mif文件說明：

8表示簡(jiǎn)譜1

9表示簡(jiǎn)譜2

10表示簡(jiǎn)譜3

以此類推

每個(gè)簡(jiǎn)譜對(duì)應(yīng)4個(gè)相同的值

演示視頻：

部分代碼展示

LIBRARY?ieee;
???USE?ieee.std_logic_1164.all;
???USE?ieee.std_logic_unsigned.all;
--播放器控制
ENTITY?music_ctrl?IS
???PORT?(
??????sysclk?????:?IN?STD_LOGIC;--50M晶振
??????stop_key???:?IN?STD_LOGIC;
??????start_key??:?IN?STD_LOGIC;--開始
??????tonecode???:?OUT?STD_LOGIC_VECTOR(7?DOWNTO?0);
??????tonestep???:?IN?STD_LOGIC_VECTOR(9?DOWNTO?0);
??????led????????:?OUT?STD_LOGIC;--指示燈
??????spkout?????:?OUT?STD_LOGIC--蜂鳴器輸出
???);
END?music_ctrl;
ARCHITECTURE?trans?OF?music_ctrl?IS
--調(diào)用ROM
COMPONENT?ROM?IS
PORT
(
address:?IN?STD_LOGIC_VECTOR?(7?DOWNTO?0);
clock:?IN?STD_LOGIC??;
q:?OUT?STD_LOGIC_VECTOR?(7?DOWNTO?0)
);
END?COMPONENT;
???
???SIGNAL?addr?????????????:?STD_LOGIC_VECTOR(21?DOWNTO?0);--分頻控制字
???SIGNAL?divclk_counter???:?STD_LOGIC_VECTOR(24?DOWNTO?0);
???SIGNAL?musicclk?????????:?STD_LOGIC;
???SIGNAL?musickeyshiftbuf?:?STD_LOGIC_VECTOR(31?DOWNTO?0);
???SIGNAL?musicno??????????:?STD_LOGIC_VECTOR(1?DOWNTO?0);
???
???SIGNAL?step?????????????:?STD_LOGIC_VECTOR(9?DOWNTO?0);
???SIGNAL?codeaddr1????????:?STD_LOGIC_VECTOR(7?DOWNTO?0);
???
???SIGNAL?model_Key_down???:?STD_LOGIC;
???
???SIGNAL?ROM_data?????????:?STD_LOGIC_VECTOR(7?DOWNTO?0);
???
???SIGNAL?music_select?????:?STD_LOGIC?:=?'0';
BEGIN
???
?--例化ROM，ROM里面存了樂譜??
???i_ROM?:?ROM
??????PORT?MAP?(
?????????address??=>?codeaddr1,
?????????clock????=>?musicclk,
?????????q????????=>?ROM_data
??????);
???led?<=?music_select;
???PROCESS?(sysclk,?stop_key,?start_key)
???BEGIN
??????IF?(sysclk'EVENT?AND?sysclk?=?'1')?THEN
?????????IF?((NOT(stop_key))?=?'1')?THEN
????????????music_select?<=?'0';--停止
?????????ELSIF?((NOT(start_key))?=?'1')?THEN
????????????music_select?<=?'1';--開始
?????????END?IF;
??????END?IF;
???END?PROCESS;
???
???
???step?<=?tonestep;
???PROCESS?(sysclk)
???BEGIN
??????IF?(sysclk'EVENT?AND?sysclk?=?'1')?THEN
?????????addr?<=?addr?+?("000000000000"?&?step);--step是根據(jù)音樂文件產(chǎn)生的頻率控制字，不同step產(chǎn)生不同頻率的spkout
??????END?IF;
???END?PROCESS;
???
???
???PROCESS?(sysclk)
???BEGIN
??????IF?(sysclk'EVENT?AND?sysclk?=?'1')?THEN
?????????IF?(divclk_counter?=?"0000000000000000000001000")?THEN--50M/(1799999*2)=分頻到13.9Hz,為便于仿真，計(jì)數(shù)器0000110110111011100111111改小為0000000000000000000001000
????????????musicclk?<=?(NOT(musicclk));--musicclk=13.9Hz
????????????divclk_counter?<=?"0000000000000000000000000";
?????????ELSE
????????????divclk_counter?<=?divclk_counter?+?"0000000000000000000000001";
?????????END?IF;
??????END?IF;
???END?PROCESS;

PROCESS (sysclk)

BEGIN

IF (sysclk'EVENT AND sysclk = '1') THEN

IF (music_select = '0') THEN

spkout <= '1';--0時(shí)蜂鳴器拉高，不唱

ELSE

spkout <= addr(3);--addr的最高位就是輸出蜂鳴器的頻率--addr2

END IF;

END PROCESS;

PROCESS (musicclk, stop_key)

BEGIN

IF ((NOT(stop_key)) = '1') THEN