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本帖最后由 jili1986729 于 2009-10-7 13:42 编辑 . h/ ?( D& [7 ~& P
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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: v* i) w H, n4 [' @" e
单片机应该用892051，这里89c51，有点浪费9 O" ~) M. D t5 ~
, K" t7 l6 j, M. h程序：- ^- \" L$ P- y. r# Q. f# _ Z9 O7 h
ORG 00H
7 |4 g& _' K! X6 B, k" G5 J) PAJMP START9 c! j( D) J3 z% ]+ |9 ~
ORG 001BH& q7 J$ g) ~) _4 @
LJMP TIME1
( A/ o4 s. ^) X2 g' tORG 30H0 G, W3 B/ e5 M" Y& r8 {
START:MOV TMOD,#10H
) S- C8 f3 K* o5 m$ ?0 L MOV IE,#88H
2 G" d( r: D" D9 }5 }KEY:SETB F0
5 s% R1 A. @# w, ~! e0 Y+ o CLR EA$ r. H$ p1 p+ }8 C9 E5 M6 X
CLR TR1
; t0 {- E6 _6 j5 [. J& g( d& B MOV P1,#0F0H( f; ?) j3 k7 O7 f* W) d }3 o' `
KEY1:MOV A,P1
( P& c( Z" ^6 U6 }2 A- I CPL A) Q3 T$ e1 w! W7 p& O& R3 @- Z/ ^
ANL A,#0F0H6 d: n9 K- @7 ?& A% g3 T9 b* [
JZ KEY- v; O) ~/ ?8 Z8 d: c5 t* n
CLR F0* ~5 Q6 M, |, k8 `; p% d1 g6 m. X
L1: LCALL SKEY( }, Q m# z/ E( o
CLR EA
: i2 w& S' @; o! n/ i- }) d6 v CLR TR1
+ Q! t% W* Q* b# }& U% }% e JB F0,KEY
* h% b& C9 N. [; T6 V KMOV 22H,A
0 w k; K9 A; [! r4 [- T! U ADD A,22H
9 P0 Z7 K6 L7 A MOV R3,A7 e) W/ Y% t, t( b# z" y
MOV DPTR,#TABLE1
. y; l- _" t0 U7 a MOVC A,@A+DPTR
& ?6 k6 q* q f+ j8 ~ MOV TH1,A
2 d. L7 @! v/ `/ e0 ] MOV 21H,A& i9 k' t5 t y3 s! a7 e
MOV A,R3
! c: K' h9 Y# f* n$ t7 U% R2 i8 H# c INC A
! E2 K2 [) G8 W5 v MOVC A,@A+DPTR
! X+ _6 U* r: i; |' o3 {. a MOV TL1,A z' r7 c, Q; F* F) g+ K
MOV 20H,A
0 s" n4 P& V3 `; K9 ? SETB EA8 H3 h: [ n& R* K- Z# |
SETB TR1
) A) U! Y+ y* w+ vL2:CALL SKEY+ @6 T# N, I3 V5 {' m% c
SETB EA% D4 I u* A1 |4 z
SETB TR1
# }+ G9 r! \, G- S JB F0,KEY
7 U( N: u7 ?6 a0 G( m LJMP L25 ?: p2 K% ~3 _9 [7 R5 i. [
SKEY:MOV A,#00
1 Z- R3 w% V9 ]% \: c. |) d8 g MOV R0,A2 a, j/ G/ ]+ v% Z8 m* c' G. D
MOV R1,A; a+ j h/ j3 G
MOV R3,#0FEH5 F) w1 J2 m7 S" ^) u1 M) f6 q
SKEY2:MOV A,R33 `9 F/ j% H0 a
MOV P1,A$ o, {2 w3 B9 @9 z* f
NOP
6 j- ?. R: f! o3 v/ [ NOP7 L; n5 u; q n7 I e. J
NOP
( Q4 K, O- W! g! o; _ MOV A,P1( g$ r% U2 I+ ?7 i% |( q
MOV R1,A
+ M/ P5 c, W# m, O* f CPL A
& o( M5 g2 z/ f+ ^ ANL A,#0F0H8 z. k- E0 {7 Z6 S( |3 ^' G
S123:JNZ SKEY3
* H7 _2 K. I# \' a3 z SETB F0
% B6 C' s& a/ n2 ^6 b' K INC R0
5 I, X1 P" ~! ~! F9 I5 X0 T" N SETB C3 \4 R$ {: p9 P9 {8 B1 V& A( A
MOV A,R3
- r' d! |! K8 D% ~6 s RLC A
' d" Q9 H2 B& y1 T0 z- E MOV R3,A/ |6 _ X; B4 X: J0 U1 w* s
MOV A,R0
: ?8 q9 f, U/ K5 \* C7 v CJNE A,#04H,SKEY2
9 x0 m8 K3 J6 |, y; d' ]# |2 x1 [EKEY:RET4 j- G* j6 j/ i
SKEY3:CLR F0
8 J4 n8 I- l6 F- n MOV A,R10 p1 x* N% l/ m: ^ B
JNB ACC.4,SKEY5
! ?: J6 T5 E. K; J% y6 y JNB ACC.5,SKEY6% Z- r! b+ F& U
JNB ACC.6,SKEY7
7 f1 |1 {- q6 I$ F+ q JNB ACC.7,SKEY83 z+ J: B3 o2 J
AJMP EKEY
' z1 Z( C! o* f8 D* E7 oSKEY5:MOV A,#00H% ^+ s( w( H2 h% ^2 r. V
MOV R2,A1 v; `' m6 _* P5 Z# p
AJMP DKEY
+ }" t! @( ^( y/ c% X* z; xSKEY6:MOV A,#01H- q" W1 T) j0 n" e4 L3 l; V, ?
MOV R2,A7 f9 L) ]- U' p Y
AJMP DKEY
' y3 ~& m: M; m; _- Y/ wSKEY7:MOV A,#02H
6 w% T+ n" s4 P6 } MOV R2,A
3 _1 d& c) q, K# c AJMP DKEY9 |8 y9 d% j/ ]
SKEY8:MOV A,#03H2 r9 G# o0 y( F' L+ J" l
MOV R2,A4 q2 ] S4 t2 k2 u1 p7 ] `
AJMP DKEY
5 o# ?0 E( [$ z( y2 H. E& E6 \DKEY:MOV A,R0
9 G1 c8 v$ b9 g1 j* z ACALL DECODE& t3 Q9 H9 ^5 @$ l0 m% V v
AJMP EKEY, `$ |' i; s/ D; ]* _3 {
DECODE:MOV A,R03 j0 _% ?( [, j( ^% j+ g* ], @* J C
MOV B,#04H# }* ^ L: Z5 }# j. R
MUL AB- c @" D7 f. Z2 s
ADD A,R29 a2 L" B1 Q+ o% X
RET {) f) E. s9 F+ L6 v' ^
TIME1: PUSH ACC
& l$ q. R/ t0 l9 ^ A: A PUSH PSW- f, J5 v: }" l+ K, I. U) a% H+ s
CPL P2.4
" `: e; ^( j9 M. m7 w: @8 X MOV TL1,20H
" i. i, H: b3 P5 [ MOV TH1,21H
7 T" L7 r9 J1 G8 q$ R& t1 t6 p+ Y POP PSW
$ O+ Z2 j/ i- j; ^, r0 T1 h# j POP ACC: f5 r: z- D7 V$ C. Q) ^% X
RETI8 G! ~1 k' f1 h0 e
TABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777, v* C3 p6 t: }6 w/ h, m
DW 64820,64898,64968,65030,65058,65110,65157,65178
, i4 u- x! a4 c' } k; JEND |
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发表于 2009-10-7 13:40:44
楼主
发表于 2009-10-17 19:54:55
