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library IEEE;
/ K0 b5 I" j( Y9 Luse IEEE.STD_LOGIC_1164.ALL;
& G+ }6 ]* w. x, G' a' [$ a) huse IEEE.STD_LOGIC_ARITH.ALL;
% t# g! a- n* P. quse IEEE.STD_LOGIC_UNSIGNED.ALL;' Q( y" }4 g; S
( T' O# {- Z$ u( x0 w+ X0 y5 Q
---- Uncomment the following library declaration if instantiating
4 C, g2 c( h9 |- _---- any Xilinx primitives in this code.: [" H% t& b* J( f' M
--library UNISIM;
3 N! u9 D V7 M+ `. E! i: Q--use UNISIM.VComponents.all;
3 r7 W5 w1 T/ s& m6 ?entity musicmusic is Q3 F3 j& ? g2 E0 f, s( P
port( inclk : in std_logic; --Clock Signal
$ C- |7 ]5 E& t3 R. l, }% b spk : buffer std_logic; --speaker driver
- `3 K$ G y' p T' I6 } reset :in std_logic;4 t1 C L" g! m/ E- U
L1,L2 : in std_logic);
, L2 w V2 b0 \ r4 ]! Y! cend musicmusic ;
$ e$ K* B# C# P* r1 {, H; n--------------------------------------------------------------------------------------
: |7 H- f _7 @ R. J5 P7 F$ {architecture behave of musicmusic is5 W. z0 g$ R9 \! R' T5 \& z
signal tone : std_logic_vector(10 downto 0);6 b' y7 ^0 X% Y7 T; s; j
signal tone_count : std_logic_vector(10 downto 0);
- d# j J8 U' t signal tone_index : integer range 0 to 19;; G9 k) q( T8 y) M) n7 |5 v( m
signal clk10_count : std_logic_vector(17 downto 0);
1 ~# |6 O) J$ l# z- y --signal time : integer range 0 to 500;
8 F" }- P, g' v' `; N" H signal clk : std_logic;2 n8 y0 T4 j/ ] m
signal clk10 : std_logic;
2 n9 w4 `$ R0 B5 V signal se1 : integer range 0 to 63; # g) U/ K: S+ C( o( ?9 o4 Q& i
signal se2 : integer range 0 to 160;
! N. O- M+ M1 u( r& d# L signal se3 : integer range 0 to 35;( b0 u0 m: H; w- f2 `
------------------------------------------------------------------------------------- ' w f! |* Y9 u1 j* x
begin
. l* ]9 w+ H7 C8 E5 [! k PROCESS(inclk) --generate 2Mhz clock signal
- [* K, l. v. V: }% M) A8 F2 F variable cnt1 : INTEGER RANGE 0 TO 39; 0 _$ K' R2 d+ b# t/ ]& p F
BEGIN + A0 T& v/ {2 _2 l, u7 Q: E& c
IF inclk='1' AND inclk'event THEN * r# k+ R6 |9 k2 {
IF cnt1=39 THEN cnt1:=0; * e9 a* ]8 O% G8 Q a7 x
ELSE 0 t' k$ @, F" D% }4 H
IF cnt1<30 THEN clk<='1'; 9 B$ x' w6 q5 R+ ~7 i3 Y1 R
ELSE clk<='0'; # Y2 G& ~* e' U8 Q! f6 y ~
END IF; . @; }# }/ u0 B/ n, k5 u
cnt1:=cnt1+1; $ ~, O8 Y; L9 B5 U: W; C7 S- s) ]
END IF;
% e( D5 M4 w/ ], t END IF; % @- c! T- y" v2 S4 p
END PROCESS; # R+ ^% U: d2 N% ~' J5 N- v
------------------------------------------------------------------------------------- ) I, D& C9 f- w+ T
process(clk) --generate 10hz clock signal2 w" `. K5 X, g& F
begin
* T7 |- z: [( B7 ~( K if(clk'event and clk='1') then7 U" \- g# ]$ u- D5 ~
clk10_count<=clk10_count+1;
$ H* @ r9 l! ^; f% y; Y& P% c if(clk10_count=16#3ff#) then O4 Y2 _9 k6 q/ \ ?
clk10<=not clk10;
8 _7 u- }% y1 h; L/ }) I end if;
4 K2 c8 p. z8 W. _+ e end if;8 }' w, C6 @' f1 D
end process;
: L, V2 `" r) I+ e------------------------------------------------------------------------------------- : R; R" t7 K$ k# L
process(clk10)
$ w' {; e h) P5 h; p; Z begin/ L* G# e3 _3 M$ o
if reset='0' then
% d5 Y0 g( y, ^1 S se1<=0;
. ~! Q7 J+ u( @ se2<=0;: |+ e% w& I1 E4 K$ O2 x
se3<=0;
. e# z) J( W7 S/ W0 j* f tone_index<=0;
9 _- j" ~: h) g/ _3 M+ ^7 E8 U elsif(clk10'event and clk10='1') then + R0 `# @; ^( e* v6 m+ P$ ]/ Q
----------------------------------------------------------------------
& ?8 N% K' H+ h8 k8 ]! J3 y process(tone_index)+ B3 F; j1 ?9 n. e; A B
begin% U# n; D0 ]/ k4 J' |8 t
case tone_index is
+ B; L9 N0 K, F+ `! L% `+ t when 0=>tone<="11111111111"; --no output/ N p* m2 |3 H- D$ r
when 1=>tone<="01100000101"; --773--1
7 }& t" T+ b" W& M/ H when 2=>tone<="01110010000"; --912--2
, L, _; a, \4 D! G. o/ z when 3=>tone<="10000001100"; --1036--33 W0 N8 Y2 h( Z+ Y5 x
when 4=>tone<="10000111111"; --1087--4. p7 S8 V# J$ S ^- Z0 @6 ^) I
when 5=>tone<="10010101101"; --1197--5/ o4 d1 o; [8 m2 y" C5 n
when 6=>tone<="10100001010"; --1290--6, D8 e. c5 N7 |) D Z$ b6 m5 _' p" H$ X
when 7=>tone<="10101011100"; --1372--7
" u5 l0 I- h) V when 8=>tone<="10110000010"; --1410--High 1
7 h1 q5 Z5 ~6 J0 w when 9=>tone<="10111001000"; --1480--High 24 [1 T4 u0 |' i3 z
when 10=>tone<="11000000110"; --1542--High 3
' t( C6 _+ @/ Q3 a when 12=>tone<="11000110000"; --1584--High 41 R; l6 `4 K9 ~! m; A+ m
when 13=>tone<="11010000100"; --1668--High 5
6 U: G# G) I; W when 16=>tone<="10001111111"; --1151--High #4( E3 m2 Z: x& i/ o8 S
when 17=>tone<="10011110100"; --1766--High #5
, s' f6 v1 b. m" B3 b9 ? when 18=>tone<="10111100110"; --1510--High #2
! h3 y U8 q# L' l! ~5 r when others=>tone<="11111111111"; --others:no output$ P- i2 N* i7 x) p
+ m: Q6 O8 n; d7 w, u- `# d$ s: y# z' a end case;) @8 c5 U, d7 K6 c4 D& v" F
end process;
6 L% o- t0 t' @ a+ ` T) }$ @# z& }2 m: D
-------------------------------------------------------------------------------------
) F( H3 w' `# e/ p8 F& X. K process(clk) --control the frequence of the speaker
- f6 ^0 _* W" \) g; Z begin' n4 R* r/ D4 f
if(clk'event and clk='1') then
9 I, ?" l: a. Q+ y5 o if(tone_count=16#7ff#) then) ^0 t0 }8 Q: N! V
tone_count<=tone;8 H/ Z( @/ R. B, w: G
if(tone<2047) then
( j5 ^0 d& L5 C* I" Y7 P5 y spk<=not spk;2 s- d% g3 P2 @" o8 ]6 Q" }" g
end if;
* o* O2 x6 t1 e else5 z8 `7 I' @4 b$ U
tone_count<=tone_count+1;& n) |/ n p2 h8 R; D8 Z3 W& {8 \
end if;! O7 J( R( a+ k1 U
end if;
$ F2 F+ H# b/ {( [ end process;
* L$ y6 z/ f: ]6 o, _& M% d5 Q0 |! k$ o! a
end behave;
4 d1 c v. ~1 n- _: ?% s' n
0 x; R9 d3 z' k }+ V中 do 的773頻率 是如何算出來的??5 m0 q7 ]2 h: r' L: g
那是用多少HZ去算的??4 C n0 k) V8 j( a7 ^
希望有公式給個解答 |
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