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本帖最后由 jili1986729 于 2009-10-7 13:42 编辑
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2 ^# W" L/ t3 V6 z9 N, @我自己用单片机做的电子琴，比较简单，用了一个功放，自己做了个矩阵键盘
0 c+ A: ?8 d. K* k; u; Z: ~单片机应该用892051，这里89c51，有点浪费3 K0 k3 }$ e: ]( ^ @) `
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程序：, r& b7 `% z+ N6 F
ORG 00H$ n3 S6 D8 s& Z# o
AJMP START& D# |! l; r. C9 g
ORG 001BH
9 D) p) j1 g4 sLJMP TIME1" t' o6 o: C8 c) Q! g& z
ORG 30H
3 \ Q8 ~0 _) T: G$ T; p8 SSTART:MOV TMOD,#10H+ {# V3 f3 }" [0 {# F" a8 S
MOV IE,#88H( D* \! ~# \- T& i) Z# S
KEY:SETB F0 a5 C# K% ^) \/ b: L8 |% P
CLR EA% R+ d1 m- _# j6 p
CLR TR1
& J! n" \: W% P" W# ]7 @- Y3 q7 ? MOV P1,#0F0H
0 }- C0 k: T. ?$ H7 Q: a! oKEY1:MOV A,P18 M; t; K% I ? `: ^
CPL A7 _ S. Y& N3 Y$ s. P/ q9 z
ANL A,#0F0H- Y- ]7 u* I9 }8 O1 t
JZ KEY4 g/ M [1 O2 ^) N* [3 {( T" Y
CLR F0
* x. w" m2 B+ B1 h' ]+ iL1: LCALL SKEY I7 a3 O0 ]5 C: K" g
CLR EA
8 U( U" Z) |5 h1 w% \ CLR TR1
! t# ^' n U4 o0 ? JB F0,KEY" {# k& E( {* X! V" H9 G% }' m6 d) S
MOV 22H,A
' x& j& q, ^- e \3 f' ~9 S ADD A,22H! j! @0 w& Z: s' X6 g
MOV R3,A
- a7 s$ O' M7 Y! O- d4 H: b MOV DPTR,#TABLE1
* [& I! G: K, n* m MOVC A,@A+DPTR
, T4 l/ a% a( U: }; P. d, Y MOV TH1,A1 t, Y* p* e- h
MOV 21H,A
) F. U# v. W7 N5 H- o1 M; S MOV A,R3
W8 W' w0 q5 S v$ [2 E INC A, M+ H& ~5 A. J0 {& y
MOVC A,@A+DPTR; y+ W0 x* k9 O# `( ?
MOV TL1,A
5 g2 K4 k- _% {; H MOV 20H,A. T' Q- e$ s* s) C9 [
SETB EA( O5 ], F& g% M) K* K$ G h
SETB TR13 z" ^: ?+ O* s$ Y" B
L2:CALL SKEY
; C; s' s3 Z: @ SETB EA9 E5 i3 ]/ E6 ]' I& w3 A
SETB TR1
( w$ W. A! m+ P+ j- m& n JB F0,KEY
9 J# V, u8 a( o* d, i# o/ v" } LJMP L2
# o c' K" }6 I* CSKEY:MOV A,#00
8 L+ `- {3 T8 _0 D& U MOV R0,A1 d; x+ O+ u4 q4 X
MOV R1,A( M" D" ? F$ D& v7 ~. v
MOV R3,#0FEH [9 w8 z8 f( ^' E. ?
SKEY2:MOV A,R3! g( i; {1 H& v) K4 x; K7 C9 p
MOV P1,A
' g W# A# z8 x! c; v4 ~) s& x6 a NOP8 t; A/ L4 P u. J& T+ w
NOP
8 D" `! o( w- b+ l1 ^& q1 ] NOP' i H4 W9 s6 E7 D, `' A
MOV A,P1
7 ] f/ F1 S! H8 ?4 G& ?+ V MOV R1,A
8 R2 b' Y2 X/ ~ CPL A
( V- Z& i- h1 ?; [% X: a% N( e0 U4 { ANL A,#0F0H# p7 |% S6 B: x5 h8 ?5 g# U
S123:JNZ SKEY3
" j8 j. @1 ]5 ~2 P SETB F0
2 q# q( k2 q- n/ B INC R0- Q8 l$ ?% }; ]
SETB C o6 w9 ?+ r4 Q" H
MOV A,R3
9 w" U1 h d4 n# W9 d RLC A& R: Z7 ]8 z" @3 G/ K( c1 S
MOV R3,A/ P0 } R3 q: ]
MOV A,R0' k* J1 v9 ~3 y7 y
CJNE A,#04H,SKEY2
. q9 O2 r8 H; sEKEY:RET
, t. z' f. h/ wSKEY3:CLR F02 Q" N3 I7 A, k5 }
MOV A,R1
, @; l% d- N' \: i JNB ACC.4,SKEY5* v1 q$ Q( Y6 F/ Z& f$ q
JNB ACC.5,SKEY68 C9 x( d) i' Y. W6 \$ L4 |
JNB ACC.6,SKEY7# C" I1 D- G% w9 F* L9 l8 U1 P
JNB ACC.7,SKEY8- a! y. N7 E- E4 d9 Y8 [2 G+ m" A
AJMP EKEY' \4 { C' c8 w+ M K* i: F
SKEY5:MOV A,#00H7 G4 a5 x e( f3 w6 L/ z$ p
MOV R2,A. Q! y9 O2 W1 B- Q* _ K, `7 ~
AJMP DKEY
, r1 Y) D# ^3 _0 W' V, c# M( xSKEY6:MOV A,#01H
1 \1 p4 Z) g$ m1 d" ^3 B: N, [9 a MOV R2,A
0 l7 A% A. o8 j) G AJMP DKEY
& m6 X8 m4 q5 q$ [SKEY7:MOV A,#02H
2 ^" Q& {* S+ F/ \% M6 D MOV R2,A! W4 H% W. b, g4 g
AJMP DKEY+ _2 X' W# y4 H0 o- G7 h
SKEY8:MOV A,#03H
+ R! A: h ]/ R3 ]& ?+ {" b$ f MOV R2,A7 L5 G( J$ j b' N4 U
AJMP DKEY
/ Y& C. X( I" [ u2 }* y. bDKEY:MOV A,R09 n- I, Y# ~$ z1 c2 P
ACALL DECODE* X7 M( { b1 _1 ]+ ^" i; b, u
AJMP EKEY
* D+ H/ i3 B4 B: H7 C/ k% w6 wDECODE:MOV A,R0+ l' K. ]2 J# C7 K9 f
MOV B,#04H7 A$ L1 U |1 { A
MUL AB
2 n) `3 S! Y4 a7 c/ Y. r ADD A,R2( ^4 s1 w1 _6 l3 u
RET- z1 k% Z2 Y4 G4 y6 P
TIME1: PUSH ACC% P+ |4 e2 x* i2 ]' g! C
PUSH PSW2 u& d- h- o$ e9 l( G0 }
CPL P2.4. W# A8 ^2 D- I
MOV TL1,20H2 o: X0 @" f" A) Y# ~
MOV TH1,21H
: j* L/ L4 f" O) V; m) c POP PSW
! S# d. q y# h5 Z POP ACC
8 O/ h' t* o- c2 n- l A* j+ M& T RETI' E2 P, g( L( A& h1 b
TABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777. ?( G$ Y; m4 Z8 q8 F1 ?
DW 64820,64898,64968,65030,65058,65110,65157,65178 N9 `+ p+ q3 h& L: c6 x
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发表于 2009-10-7 13:40:44
楼主
发表于 2009-10-17 19:54:55
