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library IEEE;
# F5 n! _* a0 k$ a+ c# v9 muse IEEE.STD_LOGIC_1164.ALL;
* J8 t/ x9 {: Zuse IEEE.STD_LOGIC_ARITH.ALL;. l A# C: X ^5 \
use IEEE.STD_LOGIC_UNSIGNED.ALL;+ a* ]+ H& F$ V- {$ t' }2 ?
7 I8 @ T& E a/ y+ \8 ~6 E& L) U
---- Uncomment the following library declaration if instantiating, P7 H$ }/ x6 C* k1 C: S. y8 P
---- any Xilinx primitives in this code.1 R' Z9 z( C; ]/ R+ Y# y
--library UNISIM;
6 T% ?: e: ?" d+ E! q S' g--use UNISIM.VComponents.all;
$ D) m7 u' ]6 k4 Bentity musicmusic is
$ O1 x! {, _. D! z port( inclk : in std_logic; --Clock Signal2 |4 e& g7 O+ R
spk : buffer std_logic; --speaker driver
- D8 U1 W0 V# \, [) z reset :in std_logic;" R* {% E. W1 B% J; n
L1,L2 : in std_logic); , S+ x# {. z% D, @0 ~5 z
end musicmusic ; C$ E9 t* i& ]0 C7 M) U
--------------------------------------------------------------------------------------
; I+ S9 L8 v! u: D0 Iarchitecture behave of musicmusic is
6 Q3 [2 h% l6 @ signal tone : std_logic_vector(10 downto 0);% h. X! c; b: @( y R z7 q
signal tone_count : std_logic_vector(10 downto 0);" |) [. a( ^1 A% m4 z6 p$ g
signal tone_index : integer range 0 to 19;
# i; j8 g" Q f" |& s% l1 d) V signal clk10_count : std_logic_vector(17 downto 0); 3 g: } H3 a% W% {& [1 V7 {
--signal time : integer range 0 to 500;
. y0 Z7 X( ~+ g+ m; o signal clk : std_logic;) H# \1 p/ @' C7 F
signal clk10 : std_logic; , T4 n- ?% C! O- z7 R. h' \$ P
signal se1 : integer range 0 to 63;
2 p9 [& c+ q+ E% k' M( c signal se2 : integer range 0 to 160;
( F$ r: I1 X+ c4 X8 t; a signal se3 : integer range 0 to 35;
, @8 R3 ^( D; U/ h# r-------------------------------------------------------------------------------------
/ B6 q5 f$ G# l2 U begin$ x0 j( }2 W6 e1 _9 F, \: l
PROCESS(inclk) --generate 2Mhz clock signal
' b: l% K" J* k* E variable cnt1 : INTEGER RANGE 0 TO 39; [& u# t+ G x) z
BEGIN
\; v4 @. y8 Z" C9 D/ b6 S IF inclk='1' AND inclk'event THEN
2 K0 N0 R9 G- o* [/ C- Y5 _ IF cnt1=39 THEN cnt1:=0;
7 b v, H4 a8 c1 q ELSE
6 g& a4 k. Z' E( ?2 B$ |3 n$ o9 C1 |# i IF cnt1<30 THEN clk<='1'; 2 Q1 T' _9 W( H0 S3 D2 _# A' d
ELSE clk<='0'; 6 |- m- V# x) m( W) [3 ~
END IF; 0 L& a. W! q$ P, I. E
cnt1:=cnt1+1; + F- `1 ^# [5 z5 ^# g
END IF;
% y- k! K- A* |- e8 U% Y+ G END IF; 7 H* `- G" b9 X. u
END PROCESS;
# G. d: B% }6 ^9 S-------------------------------------------------------------------------------------
7 w. z# G: v2 S3 ~, z3 u5 Nprocess(clk) --generate 10hz clock signal
/ F! E' s, p8 e A6 s* ^ begin8 f: [& R) N {0 P! a
if(clk'event and clk='1') then1 J$ w% ?" Z4 p
clk10_count<=clk10_count+1;, G9 W5 }+ Y7 ?3 F% Y
if(clk10_count=16#3ff#) then/ Y, z$ Y1 D0 U( @+ U/ {! G
clk10<=not clk10;, h# U# M! J$ f0 q
end if;7 M! w* a. M9 t2 {' |
end if;- a( k" R% x! d, t
end process; 3 l+ Z4 z/ H! Y/ N) A" W/ z
------------------------------------------------------------------------------------- 8 x' I9 p0 w, a( g
process(clk10) % @. b+ m7 ]! n: R' J" G3 \
begin2 L# p# H7 `2 l9 \1 i% D0 @! S! V
if reset='0' then
V ~! G3 x. L2 x se1<=0;
: x5 O$ |7 ^ J( z" \( d se2<=0;, e; l. D- N* p' f! l3 f
se3<=0;9 s+ B, O' u% g0 V7 ^; |# f
tone_index<=0;1 _; n. Z1 I+ \8 y2 j
elsif(clk10'event and clk10='1') then # r$ t5 W) ?5 D- |& _& T* s
----------------------------------------------------------------------
; H% `+ D2 i$ @( H2 _ process(tone_index)
# `1 F% B' d4 X s9 y) j; K7 I6 F begin: {0 A- g! `; ^# n7 e: y! N6 n- g
case tone_index is
- Y* w z0 D/ h* m3 \+ l' t) d when 0=>tone<="11111111111"; --no output, _% T& X1 U* ]$ F
when 1=>tone<="01100000101"; --773--16 P( Z$ A! x( @3 o9 b7 J# [4 l# J
when 2=>tone<="01110010000"; --912--2
: D6 b* b/ m( ?1 L6 ~ when 3=>tone<="10000001100"; --1036--3
9 y1 r- s# H6 K/ O when 4=>tone<="10000111111"; --1087--4, ^$ p" g2 I8 z, C6 |; v4 h( q
when 5=>tone<="10010101101"; --1197--5
. V) r6 `/ w% @+ @3 {$ B3 F when 6=>tone<="10100001010"; --1290--6
7 R! F3 M2 g( K6 O' i; P) d when 7=>tone<="10101011100"; --1372--7
3 |: X- `% O t% ~' D( `! ] when 8=>tone<="10110000010"; --1410--High 1
8 P* A. f" E' o; N when 9=>tone<="10111001000"; --1480--High 2% [; f7 f# \; k+ V2 w" o s6 i1 H
when 10=>tone<="11000000110"; --1542--High 3
' @( W5 E7 S" F$ r% n8 Q& m" v f+ n z when 12=>tone<="11000110000"; --1584--High 4
4 p, ~) ]2 I" V, ~% \7 x when 13=>tone<="11010000100"; --1668--High 5
3 d; V' I; @$ ? Q7 G" _ when 16=>tone<="10001111111"; --1151--High #4
% M# x/ B) E% K! R/ I" P when 17=>tone<="10011110100"; --1766--High #5
/ A ?6 O v0 B1 u, \0 m$ U when 18=>tone<="10111100110"; --1510--High #2
) @: N) }" Z" ?9 \1 ~ when others=>tone<="11111111111"; --others:no output
5 _" h5 \ l% a9 v1 y
5 y3 f- n) \. m end case;
8 R3 `( ~5 }1 h5 l9 e4 c end process;
% u1 r4 j/ p0 C2 m# r
7 S, g: }! @6 R% y% B |/ \7 t ------------------------------------------------------------------------------------- # j2 e5 v! \! b% v1 y
process(clk) --control the frequence of the speaker
) W* i4 L9 A( `4 ?) E' _ begin
0 [1 X! D5 p$ V5 G4 w if(clk'event and clk='1') then
& r* @0 N) M& r0 L$ G8 h if(tone_count=16#7ff#) then; u+ M' G+ K& w( T
tone_count<=tone;4 d9 k: o% k; i; J X
if(tone<2047) then
9 c. L3 Q: C* H& ?( F spk<=not spk;
, H5 v: r7 p: k0 ?1 L end if;, S( {8 v- N7 A8 T( I
else$ Y* ^6 s4 b! R4 l
tone_count<=tone_count+1;
, c4 G# }+ U/ R. [- H; i' a end if;; y+ Y5 X. ^4 ^
end if;
# f+ `; A0 x3 U0 x, F* ~: p end process;5 x6 U4 M- o: W
1 u, }, G7 T& r! ^* ?end behave; : C. g1 E4 p. G- K7 r+ Z8 g
% R* ?" f8 M7 h; Z5 ]% q1 j9 g
中 do 的773頻率 是如何算出來的??' a Z) e5 {. E& Z
那是用多少HZ去算的??
9 `% i* ^6 L Y+ h( |- ~7 L: O希望有公式給個解答 |
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