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library IEEE;0 L" L; w# O$ T7 R% M! {
use IEEE.STD_LOGIC_1164.ALL;
3 r7 `/ A1 {! c1 J0 Juse IEEE.STD_LOGIC_ARITH.ALL;
7 C; N5 j d0 i% f( r# W: Euse IEEE.STD_LOGIC_UNSIGNED.ALL;
; }* V- N! p; P9 s2 [7 f/ `8 y" _
6 M& [: N7 g8 T$ x8 ^/ L8 r" P---- Uncomment the following library declaration if instantiating. ]' p4 U0 t$ |! q
---- any Xilinx primitives in this code.
^$ K3 c: O0 W, |--library UNISIM;
/ { q9 W6 G. p- d8 m- }, F3 _--use UNISIM.VComponents.all;# Z( O' Z1 z! U2 z! M
entity musicmusic is. A6 E! o: l7 j4 F/ n
port( inclk : in std_logic; --Clock Signal
; @3 k" O# d1 U; r E- g spk : buffer std_logic; --speaker driver
' F* @' z1 ~$ E1 i d reset :in std_logic;& U8 h/ [; K$ m$ f3 w+ u
L1,L2 : in std_logic); 8 x0 S1 i0 K2 j- f) b
end musicmusic ;5 W, V6 X/ u+ E
--------------------------------------------------------------------------------------
- m" ^& ]) ]5 t' j3 D1 Rarchitecture behave of musicmusic is0 u& r/ Y/ ~$ t. C
signal tone : std_logic_vector(10 downto 0);0 w0 v. y# i( E4 C
signal tone_count : std_logic_vector(10 downto 0);
7 a- Y3 ~, H0 F9 u- F4 _ signal tone_index : integer range 0 to 19;! a6 K9 a; l* X* @% i
signal clk10_count : std_logic_vector(17 downto 0);
3 y, m" e& f/ h* R, Q4 m. L | --signal time : integer range 0 to 500;. @- E7 v Y! B' b3 c$ I$ @
signal clk : std_logic;9 U1 o- m) V0 ?/ s$ Q" _
signal clk10 : std_logic; 3 i/ a0 z6 L' ~3 x
signal se1 : integer range 0 to 63; 2 h* D1 S" K3 A/ B0 G
signal se2 : integer range 0 to 160; : j+ J) o4 r3 U6 u6 n) r
signal se3 : integer range 0 to 35;+ |% r9 p$ w9 y: o
------------------------------------------------------------------------------------- - @% n( {- M. c3 |1 Q- r2 O
begin0 `/ M6 h) W# y# f
PROCESS(inclk) --generate 2Mhz clock signal
" k9 _/ v+ U) ^) m/ O1 C8 B. ^. Z variable cnt1 : INTEGER RANGE 0 TO 39; C W0 V- F# l( |6 d- f
BEGIN * b0 | q$ ^; \, ?4 j, k" _0 \
IF inclk='1' AND inclk'event THEN 3 B# ^' n" K# ?9 j T
IF cnt1=39 THEN cnt1:=0; 5 h5 {/ ^- \; R6 B) [
ELSE 5 x& B, n6 n7 E& N. b& d% h
IF cnt1<30 THEN clk<='1'; & d( H4 c8 ^6 `& s
ELSE clk<='0';
4 k" e4 d" Y/ E7 `+ b+ ]. v! H END IF; : A1 _. H( c5 @: z
cnt1:=cnt1+1;
6 x' W& f, F# R, H END IF; 8 f b. l6 X( A3 t9 t$ O, F( ?
END IF;
3 ]. Z- x) d) m+ C2 [: X4 u END PROCESS; 5 t0 X0 N* ]$ |: O J
------------------------------------------------------------------------------------- B& S j- W4 @) ?( w8 j4 C
process(clk) --generate 10hz clock signal% I( _3 L; o5 p! a, q3 Y. ^% a6 R
begin' W6 z3 v+ W' R0 K
if(clk'event and clk='1') then1 m9 G% H4 q6 Z/ N
clk10_count<=clk10_count+1;3 c1 j: u5 y2 ^
if(clk10_count=16#3ff#) then
' r+ f! f' h; C clk10<=not clk10;
; S3 q5 [2 ~& q) p: D/ f end if;
% ?0 \/ Z; k7 Q6 a4 c end if;) d6 { Y. E. @6 A+ ]. u
end process; 0 {. M, d3 H- i2 ^3 `
------------------------------------------------------------------------------------- / f; p1 a4 l1 l
process(clk10)
9 G: b, ~$ C6 R2 E! Y# T p3 C begin
* ~. Q. a( o/ w if reset='0' then
: v! X9 M# _4 G se1<=0; + @4 N9 Q+ F. m$ \
se2<=0;' V- g* C4 b9 _1 c. Q* e
se3<=0;7 c9 D5 m8 t% `$ ~4 Y
tone_index<=0;
$ C0 d7 @' d# O8 C8 G/ f' H elsif(clk10'event and clk10='1') then & K- S- N* W9 f3 W8 f6 n
---------------------------------------------------------------------- + B; p! U! a3 z/ C" R
process(tone_index)
c7 H! e0 U+ p+ _/ G& t' @ begin- W0 q1 M3 K! K5 _4 @ o3 W
case tone_index is, F! Z0 \. }& g8 w; \. a6 u
when 0=>tone<="11111111111"; --no output
; ~# t6 W, Q- S# e when 1=>tone<="01100000101"; --773--1
! b' @" P! q0 S" r$ Z; r# b when 2=>tone<="01110010000"; --912--2
2 H7 `- w6 ?9 @2 |" ]( c when 3=>tone<="10000001100"; --1036--3
) e, Z/ }/ P6 s0 D when 4=>tone<="10000111111"; --1087--4
6 s8 Z8 v1 V4 m; U) J5 |, ]4 r when 5=>tone<="10010101101"; --1197--53 U( c" F: l- l$ E, g0 p
when 6=>tone<="10100001010"; --1290--6
6 C! a9 Q( s2 x9 p, b7 y+ ?/ } when 7=>tone<="10101011100"; --1372--7- `& t. N! t+ s& }5 g' l, `6 V3 T
when 8=>tone<="10110000010"; --1410--High 1
! |4 B7 c( S" f2 M$ {- e when 9=>tone<="10111001000"; --1480--High 2
6 @* n7 p- T; X9 t' A5 U) Y, s when 10=>tone<="11000000110"; --1542--High 38 ^( }* [! M) u
when 12=>tone<="11000110000"; --1584--High 4; h8 u; @/ M( c$ U; x
when 13=>tone<="11010000100"; --1668--High 57 |, X( Y5 w7 M$ U0 J& I
when 16=>tone<="10001111111"; --1151--High #4
( C1 H, C# w2 t when 17=>tone<="10011110100"; --1766--High #5 9 v7 j" U; Q' I9 o! |2 J
when 18=>tone<="10111100110"; --1510--High #2! ]$ v0 K2 z1 r- h* h% C
when others=>tone<="11111111111"; --others:no output
& a+ i/ r2 u; E/ {, }
! S6 z& \8 |" N% w# ]4 R7 O end case;
$ q' Q: W5 O, X: ]: G0 \2 X2 x! f end process;
- @4 A% t1 l6 v$ i( d# \5 p% B) f. j& t9 n. z/ \
------------------------------------------------------------------------------------- 7 X! u, T" X: R
process(clk) --control the frequence of the speaker. d X, N' p8 J5 M8 Q; D d
begin
; \% Q# t$ j8 _ if(clk'event and clk='1') then+ J9 Z, J, _7 H
if(tone_count=16#7ff#) then( r4 e3 k0 F3 L" W0 m7 x' Q
tone_count<=tone;5 f% w) ]2 A" @! b, w9 x- b$ b& C
if(tone<2047) then
5 Y! e3 V( f$ \3 i( f spk<=not spk;# Q. ^+ A ?0 b) j6 k4 @
end if;- M8 L" ~: w, l; N, t( M
else9 G. a) ~0 f& T# b, i* \4 [
tone_count<=tone_count+1;# a/ n4 f H" h+ f' J6 r
end if;
! O6 L! ^5 n' n# a- B end if;6 A1 `- \- P) D
end process;* z; E7 T! y) i) c9 [5 l4 B
- V( N8 \& o' [. B) k
end behave; 5 K7 `$ z. E6 Z/ ^1 \
- i; J( L+ ]: U J" o" \
中 do 的773頻率 是如何算出來的??$ t% g# g! b, q
那是用多少HZ去算的??& n1 L% }8 q- u0 h8 h" L
希望有公式給個解答 |
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