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library IEEE;" g, w, {( ?8 `* d- ^# |
use IEEE.STD_LOGIC_1164.ALL;
$ b2 X0 u' L4 _use IEEE.STD_LOGIC_ARITH.ALL;0 ^5 o/ e! P5 b# }
use IEEE.STD_LOGIC_UNSIGNED.ALL;
( M; M6 Y- L: o( W* F8 y$ V/ F" j- ?2 |9 }. ]8 p+ T a
---- Uncomment the following library declaration if instantiating
1 w+ Q' N/ t# e; ^* B- t---- any Xilinx primitives in this code. r* D. L! C5 T/ O. r- p
--library UNISIM;- B( a6 x1 F t. K8 N% @, L
--use UNISIM.VComponents.all;* z. c! O9 m$ L( ~) t0 V6 E
entity musicmusic is b6 }7 n0 d$ ?* D* Y
port( inclk : in std_logic; --Clock Signal3 T6 ]2 Z4 [4 a% f
spk : buffer std_logic; --speaker driver
* Q8 B! s- K5 i" d reset :in std_logic;1 N ]3 j! a% _; D. L+ z) o3 R/ P
L1,L2 : in std_logic);
r9 ], F: u" {7 V5 Kend musicmusic ;
3 h" {& j1 T" S# a. N" U U--------------------------------------------------------------------------------------3 L+ c- w, h7 \4 G1 U3 G1 o, z' W
architecture behave of musicmusic is' I6 ]( t+ i& I6 H& t( R ?- V t) C, |
signal tone : std_logic_vector(10 downto 0);
. u2 ?6 C. d' z6 G signal tone_count : std_logic_vector(10 downto 0);
5 F( z. ~: q8 d0 {2 C, T" Y) L signal tone_index : integer range 0 to 19;
% T# R4 I3 u9 Y* D% k signal clk10_count : std_logic_vector(17 downto 0); ) x% G0 `3 t9 ^% V4 w4 V
--signal time : integer range 0 to 500;( D& b1 v i) e
signal clk : std_logic;; W5 \ P: l' B7 T4 X
signal clk10 : std_logic;
( `& Z5 `# t2 e W+ x signal se1 : integer range 0 to 63;
: i2 a1 y3 h% x( [4 _3 T+ b signal se2 : integer range 0 to 160;
6 k% j+ m, O* O2 _# J7 U signal se3 : integer range 0 to 35;
7 P `: [/ r4 G# K------------------------------------------------------------------------------------- * A8 d* ]4 w% a* T( I( n0 r4 M
begin
& ], ]1 o# t- W Q T/ t, f3 | PROCESS(inclk) --generate 2Mhz clock signal2 ~' N0 e# P0 y1 N0 g) b
variable cnt1 : INTEGER RANGE 0 TO 39; 5 F! y* D# d) J
BEGIN 9 p- S' _& _8 ]! {$ j
IF inclk='1' AND inclk'event THEN
0 @1 x" M5 d4 i' x+ n" M& G# G. B IF cnt1=39 THEN cnt1:=0;
! n3 w7 v9 t2 L' q ELSE
$ L$ k2 M2 t6 e$ D( r IF cnt1<30 THEN clk<='1'; ( `( M6 {+ {- ]; r
ELSE clk<='0';
K( W7 X4 d6 k, ?# a# n! A END IF; . S' u1 u; O9 S+ F
cnt1:=cnt1+1; $ A4 z6 |, M! U
END IF; ; V! {4 ^: Q6 G+ K. z+ C' ~5 ?
END IF;
5 Q: @% w# n. P6 w7 J END PROCESS;
! M0 z7 w- k9 s A, M/ B- }$ U+ V-------------------------------------------------------------------------------------
0 [" A% Y6 P& ]process(clk) --generate 10hz clock signal) ]9 C. I8 Q' D# k
begin
' B6 A8 b" I5 Q if(clk'event and clk='1') then
; R( [% Y: }9 @( O clk10_count<=clk10_count+1;) s4 w5 ]2 @5 m
if(clk10_count=16#3ff#) then8 y& i! @: y! \6 K5 s2 G
clk10<=not clk10;. C3 L: a4 W. q5 u
end if;
; N8 ]; X8 ?: z) b+ J4 u end if;
! A& p, x5 p$ {" h4 }' U0 P ?1 T end process; & w* R+ Q! Y9 N/ u4 o2 A# H
------------------------------------------------------------------------------------- ; X& x" O' Z' k" P
process(clk10)
t( h0 q: j! P8 S. H6 r begin
! I# E& N4 ]* q/ d9 d if reset='0' then8 D z! @, n- j
se1<=0;
: Z3 r* }5 P6 Y& x7 Y* z. R se2<=0;
1 k% P( W0 V' j2 t( [* r se3<=0;
' H* ~9 _6 N) w0 Y tone_index<=0;
3 R& v, t/ M, x' A) `( j elsif(clk10'event and clk10='1') then
% ]; m! T0 r$ b7 c) F---------------------------------------------------------------------- 8 v3 T& z2 C) ~. G4 t: W
process(tone_index)
% b2 k( Q q0 o( T- i, a5 J begin
) {5 ^- k& k3 g& q. n case tone_index is
4 A- n$ W6 W* ?3 H1 w# H when 0=>tone<="11111111111"; --no output0 _. h/ B! W4 w( J
when 1=>tone<="01100000101"; --773--1
. y, j# ?$ l4 k' Y when 2=>tone<="01110010000"; --912--2
% ]+ e. o. C6 X when 3=>tone<="10000001100"; --1036--3
" F7 i/ A. k2 K$ b when 4=>tone<="10000111111"; --1087--4
) J% Z! |; q2 g. }7 w/ G7 K when 5=>tone<="10010101101"; --1197--5" `0 U; t* L; r4 b
when 6=>tone<="10100001010"; --1290--6
" G) K8 |% W- b when 7=>tone<="10101011100"; --1372--7
( i3 U( u1 n) w2 \" r1 o when 8=>tone<="10110000010"; --1410--High 1
1 P, ~8 K) y4 o& ]. M( K when 9=>tone<="10111001000"; --1480--High 2. z1 P! K$ R( r" W
when 10=>tone<="11000000110"; --1542--High 3
$ V% e7 O9 i# q$ Q! ^ when 12=>tone<="11000110000"; --1584--High 4) C. K( e9 B3 z% S2 J
when 13=>tone<="11010000100"; --1668--High 5( W6 X- f m, W! i
when 16=>tone<="10001111111"; --1151--High #4. s2 @9 ~. m3 P4 N. S; L
when 17=>tone<="10011110100"; --1766--High #5 " Z! x' {! V: f2 J/ f
when 18=>tone<="10111100110"; --1510--High #2- }, r$ W+ t9 F" H |
when others=>tone<="11111111111"; --others:no output
* @* B8 G. D+ o0 r* N$ E
# W2 U- V9 E$ |% e end case;) }0 E; D% ^: u: m \: R
end process;
/ k" ^) u# N$ f( O( ]4 ]% C
! c" f N2 U+ d. V* L* i -------------------------------------------------------------------------------------
8 w* h1 s9 i/ K/ g" u process(clk) --control the frequence of the speaker
) D: q7 M4 X7 ^7 n begin
j2 n& t/ [6 T- r5 l v1 ]7 ~8 c7 X) U if(clk'event and clk='1') then% b. y( f0 w( h; N
if(tone_count=16#7ff#) then
v- r2 P+ W2 x/ k7 ` H5 j tone_count<=tone;) e$ ~; A. z' B) N5 C8 t9 d! }
if(tone<2047) then9 U/ E* e+ `: l' W) c
spk<=not spk;
3 ~7 l: y+ \7 P' m end if;) q- e' s: x7 M2 w7 i
else
& \0 c/ Q7 O5 Q. S2 T& G tone_count<=tone_count+1;* J) s. |/ u$ y- Z
end if;0 T5 ?6 G$ W1 _3 ? m
end if;
1 @5 y# s* D" z6 ? S7 E0 X end process;& q5 _9 n2 ]0 D3 p; r5 a
& g6 `' p5 R# k! v) _
end behave;
, u" V2 l9 L! J1 T0 W# [, g$ f. D s7 }
中 do 的773頻率 是如何算出來的??
0 s$ ~7 v" ^ N* S. _那是用多少HZ去算的??. x. e2 s. h! s6 g" i( y, p
希望有公式給個解答 |
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