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library IEEE;& u# g9 P9 A/ g* L0 |
use IEEE.STD_LOGIC_1164.ALL;
8 q. p# [! X# Z7 u" @+ h) ~use IEEE.STD_LOGIC_ARITH.ALL;: Q4 n( n; G! h, o& S: ~
use IEEE.STD_LOGIC_UNSIGNED.ALL; U( S' }, {3 D" ~( {3 T: q4 S
9 g4 F3 j! K ]4 ]5 _0 |: @) K' R
---- Uncomment the following library declaration if instantiating5 d4 l9 ?4 E7 Y; E; ~3 p3 t0 I
---- any Xilinx primitives in this code.
! _' k9 c* _6 k( N" b--library UNISIM;" ~) i' ~7 f6 ]; e& Z
--use UNISIM.VComponents.all;" v) v+ P5 \/ ]+ D5 |0 ~- u/ D/ b
entity musicmusic is. z# ^( x, u3 t
port( inclk : in std_logic; --Clock Signal
, ]5 g& O, d3 u2 T$ B0 t spk : buffer std_logic; --speaker driver* H5 W3 X8 |$ y% M' H* l
reset :in std_logic;. ^$ d4 ~: u! p
L1,L2 : in std_logic); 8 _9 c2 P3 g; g& W, Y7 |
end musicmusic ; \% \- A, I; U4 `; F
--------------------------------------------------------------------------------------
; r4 O* R" Y: `9 C- aarchitecture behave of musicmusic is
5 V0 x+ A$ N8 u( ? signal tone : std_logic_vector(10 downto 0);% K2 D2 D% d/ R8 F
signal tone_count : std_logic_vector(10 downto 0);# V' I9 ? K9 f9 {
signal tone_index : integer range 0 to 19;
6 @. Q4 {9 i: E& w- C% O6 q signal clk10_count : std_logic_vector(17 downto 0); 1 @6 F# R3 ?0 D* w; S- r" J$ i$ I! [* ~
--signal time : integer range 0 to 500;/ i* t3 V, ?) G; B# U+ L
signal clk : std_logic;
4 H. K% H& T6 t9 h8 I signal clk10 : std_logic;
& f4 H; @2 h, }' I" I: a signal se1 : integer range 0 to 63;
$ e/ @3 S. F5 ]; q% Q$ z3 }, o5 t signal se2 : integer range 0 to 160; + Y# z M$ U9 D' X/ F+ A) D
signal se3 : integer range 0 to 35;
; Q+ z& E+ { [& \+ [: D: i( K------------------------------------------------------------------------------------- 0 l4 K" A% Q2 x; J
begin9 T- s4 A! Y' m' y
PROCESS(inclk) --generate 2Mhz clock signal
) L( Y" \4 `& t/ w$ j variable cnt1 : INTEGER RANGE 0 TO 39; , i# c( A H7 w! \& K
BEGIN
$ P# k0 R6 m) X( l5 B; z* D H IF inclk='1' AND inclk'event THEN * i$ J4 \$ w8 d
IF cnt1=39 THEN cnt1:=0; ; }! W0 ]# }3 C# B" V3 r( U3 G
ELSE
4 h8 w* i, d! @' x. S& R IF cnt1<30 THEN clk<='1'; : S0 F' k; r. c! Y: h
ELSE clk<='0'; # o3 d$ \8 T8 ~* M, O8 n- S
END IF; 2 R5 z, p# W* V y/ O$ ^& D
cnt1:=cnt1+1;
% z) m; p/ T- j4 o$ ] END IF;
+ z( u3 D# V, z4 U3 \8 h* D END IF; " f" ^7 E! m5 V( ]0 W! d9 O0 {% n. a
END PROCESS;
& e: {2 X# m, q O( x% a. @9 H-------------------------------------------------------------------------------------
$ r. j" f) f; Y, ~$ @/ Y- |process(clk) --generate 10hz clock signal
& z0 k) M6 F, F begin8 f; a- Z7 x. z7 {
if(clk'event and clk='1') then2 ?3 G! e- N& p# Q Y
clk10_count<=clk10_count+1;
2 ?; G) D2 y2 z) T' U: E if(clk10_count=16#3ff#) then. K6 m% h3 Y% x' f& ^) X3 s" c
clk10<=not clk10;
5 w- y7 s' M% {7 X; G end if;
6 X: i% j ?8 Y4 W. o' z# h, V end if;' e0 o7 _7 W0 E% i
end process; ! f& N/ U, J' [2 M0 T) p( ^
-------------------------------------------------------------------------------------
/ @# g" k( E/ i8 O1 ]' b9 | process(clk10) , d$ l8 x! y1 i6 t# J
begin
& b$ D. E, @2 W if reset='0' then4 p2 A, S5 p% A5 b0 Q% n
se1<=0; 4 v8 w, V/ _* J) `' B/ [* w
se2<=0;
8 |6 w& b2 t. [ se3<=0;
2 d( D7 E: o1 D$ W% _. A tone_index<=0;" P5 G; z# A8 \( B
elsif(clk10'event and clk10='1') then # P1 i7 Z) [5 ?# ~
---------------------------------------------------------------------- / N {# o, a v: _
process(tone_index)
1 c* i1 j3 o4 B d1 X6 A begin
0 W+ M4 g1 Z3 u( Y. {7 L case tone_index is4 Q$ m% {& \3 y6 T, K+ U
when 0=>tone<="11111111111"; --no output
9 w- u7 \) A; A when 1=>tone<="01100000101"; --773--1
* X n0 q5 V! a% e- R0 v when 2=>tone<="01110010000"; --912--2
# `" \" b5 S& ~2 A1 w* T# D when 3=>tone<="10000001100"; --1036--3' @6 k2 O7 k; T; @' o
when 4=>tone<="10000111111"; --1087--4/ L9 z" U5 K" e) T' d& T) g
when 5=>tone<="10010101101"; --1197--5
% i1 {, p! y, I$ ?) J' b! c4 T when 6=>tone<="10100001010"; --1290--68 Z; b8 J9 Q" P+ b1 {) B
when 7=>tone<="10101011100"; --1372--7
; p9 x) U% ^ V( z+ ? when 8=>tone<="10110000010"; --1410--High 1
, U3 R/ _! h0 \, S; f( Q% g when 9=>tone<="10111001000"; --1480--High 2
' z0 t& B4 K! F when 10=>tone<="11000000110"; --1542--High 3
+ S5 M1 u' l. [) ^ when 12=>tone<="11000110000"; --1584--High 4
P0 Y- ~% T8 K1 s" U/ a1 ]5 Z when 13=>tone<="11010000100"; --1668--High 5 r; ?. f' H3 t1 |
when 16=>tone<="10001111111"; --1151--High #4# p3 {+ V' j7 }' J
when 17=>tone<="10011110100"; --1766--High #5 " a# P5 @& ^" `$ V9 H- a0 w- @
when 18=>tone<="10111100110"; --1510--High #2
. N( m( t7 o1 ? when others=>tone<="11111111111"; --others:no output
5 \: P) i2 f7 x
1 e& u4 ?+ n+ r+ J0 L end case;
/ u5 b" e' c/ U3 T9 A& H6 i end process;
9 f% V( S" C! Q3 q, e3 x8 ~
3 u3 b, Q7 b$ Z3 ] ------------------------------------------------------------------------------------- 7 `2 F* I$ I0 `9 A
process(clk) --control the frequence of the speaker" T) C; w! q0 L$ h5 c
begin
% o0 \; v7 _7 C5 d' ~2 y if(clk'event and clk='1') then
x; K) I6 }* a5 R$ _ if(tone_count=16#7ff#) then! k2 B3 f9 Q' s1 |3 Y
tone_count<=tone;
! d8 S/ T6 _+ Z" @/ {! Y if(tone<2047) then- s; f: [1 Y) d; E
spk<=not spk;
( q' g% k5 X t8 t3 ^ end if;: }2 h: Z7 N1 d g6 ]
else/ S5 P" C9 Z( F! t' B: B
tone_count<=tone_count+1;
& H& H& A# F; t: ?1 ~ end if;4 D+ a3 B# u3 h7 T9 w! C
end if;0 e; [+ } d, c6 [" u$ L4 }
end process;
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end behave; * g5 J5 c3 V7 |2 X* n
( e5 D1 S& s/ I" Q" q+ `' g7 H
中 do 的773頻率 是如何算出來的??$ E- v9 A7 W" E6 b4 r
那是用多少HZ去算的??
$ b+ c+ O! q, b- R; @希望有公式給個解答 |
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