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library IEEE;6 K' P8 S/ b Z% l2 G- V
use IEEE.STD_LOGIC_1164.ALL;
% h$ o6 i4 A4 F) u! h* e" \use IEEE.STD_LOGIC_ARITH.ALL;% S" u: D! D6 ~, o7 y8 o8 U
use IEEE.STD_LOGIC_UNSIGNED.ALL;
' E' \" Z" k) o" L% \! X! ]4 ^# \( Q, J# G4 S9 a
---- Uncomment the following library declaration if instantiating
I- e s- @/ o---- any Xilinx primitives in this code.5 r+ J2 _1 x/ S2 |4 ?- x4 o
--library UNISIM;
S: b9 _. l. p |9 ~1 B--use UNISIM.VComponents.all;
6 R i8 P% Z: m* f: A4 C/ v, \8 |entity musicmusic is
/ h. l' M( U2 N port( inclk : in std_logic; --Clock Signal. z8 l4 g0 L% Z2 Y7 m7 p
spk : buffer std_logic; --speaker driver
( d6 u7 e% Q& M. u* V5 d/ S: R reset :in std_logic;* I3 b( U+ |; g) X$ o' L, z _/ }
L1,L2 : in std_logic); ) \! i- [1 s1 e3 M, v
end musicmusic ;
$ }: V/ @: u/ l- A+ h--------------------------------------------------------------------------------------
$ ?2 v a$ O9 \* |7 o0 ^9 e3 F7 narchitecture behave of musicmusic is6 M j" G1 w2 K7 {' ?' P/ s( ^
signal tone : std_logic_vector(10 downto 0);# ~7 N; {& n2 }+ _8 H4 h" O
signal tone_count : std_logic_vector(10 downto 0);
/ z0 {+ ]8 @; I2 M# h: J signal tone_index : integer range 0 to 19;
$ F, R/ ^ T) v. C0 B7 o3 F. x signal clk10_count : std_logic_vector(17 downto 0); ! A/ P* l# B( W; ^5 D. e% M
--signal time : integer range 0 to 500;5 g: H7 y/ Z3 y( y
signal clk : std_logic;# T" a# v- F" }& D7 @+ M
signal clk10 : std_logic;
! V* J1 C, L. Z: c% ^% L! y signal se1 : integer range 0 to 63; 2 N) u/ a# a2 p$ W* A
signal se2 : integer range 0 to 160;
, X0 b& [) D( [ signal se3 : integer range 0 to 35;
" I4 d: M4 D+ M8 ?4 c) B. ^% |, n------------------------------------------------------------------------------------- 6 s; _7 T, P" o0 q
begin8 ?0 D) L: [5 |. E {
PROCESS(inclk) --generate 2Mhz clock signal
. h: x7 V, ^' \8 \ variable cnt1 : INTEGER RANGE 0 TO 39;
% g/ X! p8 O6 E0 d3 d0 x BEGIN
- W& {1 K. C+ _' s! B+ R2 ? IF inclk='1' AND inclk'event THEN
( D6 U% C5 D9 M3 g! J/ ~5 T IF cnt1=39 THEN cnt1:=0; * |* H. r' f4 _
ELSE ( @) n- s# ], V1 C0 y- \
IF cnt1<30 THEN clk<='1'; 1 T7 d; h1 s1 u5 g' x, Y, h, n; b3 u
ELSE clk<='0'; 5 K. X5 V+ I; Q" H
END IF;
' O+ f0 I' O, p+ T% u6 S cnt1:=cnt1+1;
0 E4 s/ W; o- N. w END IF; * L* v& j# z, V2 E3 |: P
END IF;
N3 @ F! y7 b. Q1 ]( Y L# }. z END PROCESS; 5 c) q( u3 d$ f) n, }
-------------------------------------------------------------------------------------
# K( F9 a# \! G1 Dprocess(clk) --generate 10hz clock signal
" i0 H+ }- F+ R/ w9 f% E begin
! ]2 E' w1 L" d8 [0 x if(clk'event and clk='1') then
" q5 i* A- q# ` clk10_count<=clk10_count+1; C8 P: p' I$ B% N/ }7 i
if(clk10_count=16#3ff#) then9 C! E& F: X& q, @
clk10<=not clk10;
! o: a1 |3 y9 l end if;4 }% G8 D, e. _9 q% Y6 w
end if;2 f5 G3 g% a0 A3 w: E" s8 U
end process; 0 A- s( i+ c2 G/ c& V# Z4 {5 u! f
------------------------------------------------------------------------------------- % \ L" ?. N& ?' r
process(clk10)
' A& y- V$ n4 v$ q7 H8 b1 } begin( J5 R- J9 E' n
if reset='0' then: q9 @ j& Z, Y0 I1 M
se1<=0;
: w7 l5 C! X8 a6 k; U, g se2<=0;" W* f, U* p( E
se3<=0;
( C O. X/ S% f tone_index<=0;1 W* p0 a! x+ P/ c
elsif(clk10'event and clk10='1') then
7 K I* a* ^; J9 E a. e---------------------------------------------------------------------- 9 q/ P6 H1 t; N# [
process(tone_index)+ ^, x! T# C4 N
begin
/ O3 n1 t" I0 {: k/ D5 q/ n% b case tone_index is
/ ~" g8 b+ P* j5 T. W0 `% ?: b3 v when 0=>tone<="11111111111"; --no output6 g7 Z. f% t# s4 d3 a9 Y5 [
when 1=>tone<="01100000101"; --773--1
) p: c3 K: O1 Y7 m when 2=>tone<="01110010000"; --912--2
& {" W0 n: [% [7 _6 T+ J( q1 d when 3=>tone<="10000001100"; --1036--3
/ u `* a- V. A9 q when 4=>tone<="10000111111"; --1087--4
7 g" T( z- j3 ^9 j when 5=>tone<="10010101101"; --1197--51 u4 e3 W9 n' \$ \8 p# w; B8 ~7 k
when 6=>tone<="10100001010"; --1290--6
% ~6 r/ q- D0 X3 S" a; u% ^ when 7=>tone<="10101011100"; --1372--7
. w. w* v" U9 @) Z when 8=>tone<="10110000010"; --1410--High 1% M' k" Q, b3 u) w
when 9=>tone<="10111001000"; --1480--High 26 c3 ?9 {, `$ H: h( P
when 10=>tone<="11000000110"; --1542--High 3
" L4 T4 e. H$ ? when 12=>tone<="11000110000"; --1584--High 4* u# h. P) w' X q l
when 13=>tone<="11010000100"; --1668--High 54 L5 [) [; \6 M' v
when 16=>tone<="10001111111"; --1151--High #4 e9 R5 k+ P+ n: T# }
when 17=>tone<="10011110100"; --1766--High #5 8 g: P) u9 a$ E$ R" F" W H
when 18=>tone<="10111100110"; --1510--High #2/ t* x# q: N; w% n& \4 q1 P
when others=>tone<="11111111111"; --others:no output- M; \2 E; }% i5 d6 V$ ^- a
4 ^( y) T3 K3 l. ?
end case;
% ]- p ~0 d0 u$ q/ L% s$ c& r% b end process;
, g( {8 W3 Y" V+ l w& m, [8 ^: @: C' e+ K q
-------------------------------------------------------------------------------------
) }* Z: @# A2 D4 L: r1 X process(clk) --control the frequence of the speaker; b8 h% i3 c4 L" M" ?: L
begin' |# u' B2 b8 y0 ?8 Q7 m
if(clk'event and clk='1') then
) c* @' a8 w7 p3 x5 n if(tone_count=16#7ff#) then
1 o; z! M7 E p- J. v3 o2 y! c7 c tone_count<=tone;
! @9 I# K& n# v; o% [% j if(tone<2047) then' G8 ]9 E& n7 F
spk<=not spk;: @5 l9 w, E, z }- g3 ^ i
end if;/ U# R2 H% M9 ?7 q9 u3 f* J
else
+ T* ]* k; m1 v, g: F8 | tone_count<=tone_count+1;6 ~& [" W8 L' C5 `
end if;# f) O; M! Z4 `2 ?
end if;
5 [( M8 ~1 k% l* L end process;6 _; K) ]8 u9 o
3 l5 t# q# t/ e. f0 B8 o& f
end behave;
9 w- z( Q3 J1 \' Q i, U* M) @) h: D1 @$ D) h k
中 do 的773頻率 是如何算出來的??/ X' s! T; z, u; ]6 Y
那是用多少HZ去算的??
* } C: V. q6 v8 k# w希望有公式給個解答 |
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