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本帖最后由 jili1986729 于 2009-10-7 13:42 編輯 * e0 L: |$ {9 v% N
; O7 v+ Q% \( {& {4 {7 d$ e* s) _我自己用單片機做的電子琴,比較簡單,用了一個功放,自己做了個矩陣鍵盤
Z# N8 u3 B9 b( W! W單片機應該用892051,這里89c51,有點浪費( ?$ @2 B1 r2 [& J# L
: W0 l, R$ d7 H7 _+ b w$ d程序:- i5 ?/ O7 t5 T( l8 x1 J
ORG 00H
1 ` p+ W6 ^5 b9 @AJMP START
J% D) }' |3 b6 f; U$ D( h" X9 R$ iORG 001BH! k1 D0 N0 u# f L6 @. M- f4 D% j
LJMP TIME18 ^/ d& V+ u) d: r: f U' y! C# q! z
ORG 30H7 i) R* D+ q% F) ~0 T* }/ I& D
START:MOV TMOD,#10H
0 I0 [5 y B$ P# w0 l MOV IE,#88H. u- K# _8 ~& ?$ i! B
KEY:SETB F0
% @5 l: N5 s$ D7 J- p CLR EA$ }" I2 Y% \* F6 ?5 S( j, q
CLR TR1
% e& }! `+ f0 L5 F: G1 J8 M MOV P1,#0F0H q! B3 S. s/ r. y; Z
KEY1:MOV A,P1$ f0 \0 B/ _- h% l. V$ b
CPL A" m; Y5 B. k" L, N7 K; ]
ANL A,#0F0H
; C/ Q/ w3 H/ k4 d8 ^- H JZ KEY
0 e: u k% e. u) G CLR F0
+ R7 |! v/ a1 b. sL1: LCALL SKEY
0 I0 W$ [: o, z- ?( b CLR EA& l0 R7 ]& F' {3 O8 }3 ~- k# _' @- X$ P
CLR TR1" }9 ]- f' J1 j2 [' H
JB F0,KEY+ W- G( I* n7 X$ Y# M, ^
MOV 22H,A
$ ]( Q" ^ R/ r) |6 J8 t" J% z ADD A,22H. u* x$ e$ T* a% k. R5 \
MOV R3,A$ J/ b, i0 Z$ B7 N6 _- }
MOV DPTR,#TABLE1: V8 ?% b7 O' t) {7 L7 ~
MOVC A,@A+DPTR
# u: r# h! p. q* T3 @% ~ MOV TH1,A
$ x7 Q! w9 _3 U' F, n MOV 21H,A( z+ i1 ^9 E9 h6 [* M' `0 C
MOV A,R3
1 v/ Z: t' U0 q ^& u& t/ F INC A* j* N' w; @% s E H4 S
MOVC A,@A+DPTR4 c: ]9 ^! c' {7 O
MOV TL1,A0 R$ ~' n* C* ~( \0 z
MOV 20H,A. p6 ~7 H; _. H8 a
SETB EA4 Q4 ?( T4 w9 E: V, j
SETB TR1
j6 z5 r6 ^; e/ a# p1 q' g! tL2:CALL SKEY/ f! s( M y% [5 ?0 }
SETB EA
( Y: S2 b" w$ ~7 i0 Y SETB TR1
/ f" S3 K- w4 }% J! T0 T* G JB F0,KEY Z$ }* k$ m$ z4 }
LJMP L2
3 h2 a- {7 }( @/ q; s5 I+ p, e0 JSKEY:MOV A,#00
, ^0 s, t6 z" X" h4 k' r( a7 u- S MOV R0,A
0 _2 D6 V! ?9 Q8 c4 E0 O* U2 R MOV R1,A
, _" c# p3 c0 r MOV R3,#0FEH
( m2 _6 s+ r! K) v3 }SKEY2:MOV A,R34 M: F% D- f+ D7 Y u( }+ r6 O7 ]# }
MOV P1,A
- m* a3 j/ g" v5 f1 A. q; T NOP3 U* N' ]! N0 c \1 c5 k! s
NOP4 S; Y" i( w2 ~1 b: B' @
NOP# W# N! B& {) K5 ~) S# x3 \
MOV A,P1
/ m' b: S1 M1 O MOV R1,A
, }! T* ]& t% ?' k+ u CPL A
( x$ V5 t4 |! {& r7 m ANL A,#0F0H
0 R G# f5 r# t6 O' @7 ES123:JNZ SKEY3) _4 G( ]1 T/ h* g2 L3 }- X" P
SETB F02 I- v4 n5 r2 ~6 k
INC R0
- K( |' T9 w. t* C0 A SETB C$ u6 _, x" S8 {: Z, B( K9 Q1 H
MOV A,R34 H0 D9 c9 s6 N e- K
RLC A
2 o7 K; P7 U% `, W MOV R3,A
( c' |( K7 u2 O' A MOV A,R0
# r% F0 ~. p2 ?2 a2 \6 V) |0 m CJNE A,#04H,SKEY2
: P5 c$ V7 s( U9 W0 fEKEY:RET6 G$ x9 m3 U; P
SKEY3:CLR F0
3 o/ f8 k" P" v/ K* g MOV A,R1
& ]* s3 K, p [6 G3 N" @ JNB ACC.4,SKEY5$ R" l! i, k- [' O/ i
JNB ACC.5,SKEY6
% d% t% e( Q8 ]+ I2 Y" O JNB ACC.6,SKEY7
3 {: {' S+ r3 x2 I* t X) t" M JNB ACC.7,SKEY8) C, A+ @* u/ k* a. s
AJMP EKEY
8 X6 D0 a. ^$ A0 {5 h' CSKEY5:MOV A,#00H6 ^3 l$ D$ o1 B" I5 T9 H. B
MOV R2,A& K( F% W9 M( c+ a% K
AJMP DKEY: o0 S( S# r8 ~ s! A
SKEY6:MOV A,#01H4 O( f5 ?8 c8 l& h; ?6 [+ U' u
MOV R2,A
$ I" `* o9 w% o5 T$ A0 _9 y AJMP DKEY6 a+ ?7 K: |9 x
SKEY7:MOV A,#02H
0 P% r, K) O( b- o5 ^4 ~# s, G5 H MOV R2,A
+ a2 B( q5 t' Z8 }, B3 H$ _$ v5 e AJMP DKEY& o3 Q9 ?3 V3 [( j
SKEY8:MOV A,#03H V" U, q+ ^1 m4 O
MOV R2,A0 h& r# Z4 P4 t* V
AJMP DKEY
2 C1 l+ `8 g# Y; R% L9 _4 PDKEY:MOV A,R0
2 t( p, [+ x5 \* v' r ACALL DECODE
% k+ {& a- X* ^" ~ AJMP EKEY
/ ]! L( h& D' ^9 b% |# kDECODE:MOV A,R0' d4 {9 D- q1 b5 a7 |
MOV B,#04H
2 |& Q0 S1 Q4 c1 Y MUL AB: s! r$ O5 `) o" A" @
ADD A,R2
' A8 x, c9 M7 H. e RET
- J1 F2 u& l' z) k& S) t, KTIME1: PUSH ACC
3 F" E; N1 u) Q# ^( n PUSH PSW# z9 |, Y9 K3 m( \0 O8 ~1 \+ N. Y
CPL P2.4- {' \5 u( Q K6 t- O( Q* J
MOV TL1,20H7 n/ t1 ?1 w* D4 t- c) c( D
MOV TH1,21H
7 {# G K: W U1 c POP PSW+ t( }( Z5 i9 N
POP ACC! K. a6 f+ m% `! ]( B/ X
RETI
8 N. ? K9 e, D/ x/ ?/ A3 k' CTABLE1: DW 64021,64103,64260,64400,64524,64580,64684,647776 n" M' O8 |5 ?
DW 64820,64898,64968,65030,65058,65110,65157,65178
% g2 A2 d" G2 p o6 P$ CEND |
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