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本帖最后由 jili1986729 于 2009-10-7 13:42 编辑
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$ a$ L/ }6 w7 A2 `1 [1 K7 h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
! E q" `6 x# D3 Z单片机应该用892051，这里89c51，有点浪费
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程序：- ^; N1 L$ r1 X6 v) y+ C
ORG 00H0 n! v5 }) f8 I$ x# t
AJMP START( Q0 @: S9 s- B) M+ J' L4 B) U
ORG 001BH" l% m- a# ?0 {# p# B" z
LJMP TIME1" T6 l# s7 e' ]9 e+ f/ E4 _* ]
ORG 30H* b# f/ N! C7 F4 ]- R# Q8 q! l
START:MOV TMOD,#10H
( v1 j) D$ \$ Y" K# d( e MOV IE,#88H
" Z" _$ x: `# e6 R# bKEY:SETB F0
! z( ?6 t6 }+ P" a CLR EA! ~" i1 i7 E) {7 K3 X, I/ ^
CLR TR1! g% F6 I& K Z" R1 X
MOV P1,#0F0H
" }9 h4 A; N/ j/ X: a; F3 cKEY1:MOV A,P1
( s Z j+ O+ c1 W6 D+ l CPL A
# U- ]0 T7 l2 }1 v" L5 ~6 d ANL A,#0F0H
( l/ e: j G" L8 C% L+ V JZ KEY
/ j/ ?6 T9 z+ ]# i& V9 H* E4 J CLR F0
6 m: ]# J( Y) S6 `" x9 jL1: LCALL SKEY
; o x$ E8 b8 y3 ?. T: P8 Y CLR EA C% s# f4 `5 g( K$ N1 j
CLR TR1% ]2 x6 |$ z; ^
JB F0,KEY
- B+ p, B" F+ FMOV 22H,A
9 ?3 t5 S/ s' i2 o$ ` ADD A,22H' j1 n5 j; t# R9 M6 i2 B$ P/ {& n4 d- w
MOV R3,A
+ F3 ^3 d/ o ^. ], | MOV DPTR,#TABLE1
9 ] H5 S- j9 \, g0 b7 A MOVC A,@A+DPTR1 m, A# b* g& Y+ j+ R6 v
MOV TH1,A" x V: e: R9 ] a4 I+ _3 o$ A
MOV 21H,A
5 e' L, m5 b2 i7 ]! U9 R! v0 q& q MOV A,R3- S" z* b7 T# o! V& u0 D1 y& J, F+ }. c
INC A
$ z* _. A, [) Z2 N% `8 d MOVC A,@A+DPTR
' i: E7 T' g8 P; O* p7 c* b MOV TL1,A
) {; [+ m- v; z% v, M7 T' l MOV 20H,A
" _4 A1 e; z' m, S, z SETB EA$ E; W) E/ G6 p6 h# E( M
SETB TR1
9 y1 q& X+ m! v, i, \6 f8 N3 xL2:CALL SKEY
6 k4 {; I7 d$ k; O; g SETB EA
8 { k8 @ {/ _: |9 V" X2 O SETB TR15 F. k7 Y; M& a: t% ^" K& {9 p p
JB F0,KEY
* f( ?6 \3 X3 q0 \' u# U. Z; } LJMP L22 H8 n/ i+ o0 y. d: [
SKEY:MOV A,#00( M; J* }5 p" M" V" n+ S
MOV R0,A
\5 f. n+ _7 V MOV R1,A$ i, }% `, V, H( t% c% Z- ^* j$ m
MOV R3,#0FEH. n4 d! z& `/ q5 c1 {6 I2 w
SKEY2:MOV A,R3 E, p! q- a0 D) a
MOV P1,A! ^- ^8 l4 S' Z' X5 X! w) ~' t/ V
NOP* _! S, A: c. e) C
NOP
' ~! d- h' b5 g: E& i x" e NOP
9 D$ z5 m0 Q" D- O MOV A,P1- \# `( G# q+ Y( q6 `7 w$ k9 _0 p
MOV R1,A) q& B; [6 ?: F2 q
CPL A
0 ^0 t9 s+ \6 `& G. S ANL A,#0F0H* j+ H& c4 m" P }8 y: m S
S123:JNZ SKEY3
+ e6 R% C7 D/ F0 }4 T! r. M SETB F0
( E% P2 A* p, R5 l# L( Z INC R0
j# p. E, _( O0 E# o SETB C
( c% X( w* ^2 n' E2 N$ n8 ^ MOV A,R3
( s2 L7 R7 H! F$ _ RLC A
& ^) r% F* |4 q: H! p, a MOV R3,A' Z4 o- i5 a' k4 e1 e& _
MOV A,R0) y) J: p; H, x4 G
CJNE A,#04H,SKEY2
9 m: z' F9 B3 AEKEY:RET
7 [6 r8 P3 y9 B8 S# |SKEY3:CLR F0
" u7 t3 I, w5 G MOV A,R1
6 \+ \0 T4 \% Q2 F JNB ACC.4,SKEY5- V2 `8 B3 ?1 m
JNB ACC.5,SKEY6
, l; j- a' u8 u2 k# { JNB ACC.6,SKEY7' ^) s" S4 v/ z% X' s
JNB ACC.7,SKEY8, z; w- g0 l% h ^" B
AJMP EKEY# ?) o# c: x s5 {
SKEY5:MOV A,#00H4 x% i! ^( ?2 L; h7 r% E
MOV R2,A
( C7 i$ ^4 c. r5 e+ i0 d AJMP DKEY
* ^- o0 G, D+ |5 r9 w6 dSKEY6:MOV A,#01H
" Q- ^5 B, l0 w& M MOV R2,A8 }* o) F# }7 b i: N! p' C( w
AJMP DKEY' m: C8 z+ U6 U3 w
SKEY7:MOV A,#02H! e* y) y' q- G/ M: Q. y ^
MOV R2,A- x }1 e1 p7 l! w5 {6 I" ~4 M* p
AJMP DKEY. c1 S5 y' d2 q3 V
SKEY8:MOV A,#03H
' S1 }/ a q0 X: Z$ G/ H/ m MOV R2,A
i& e: s5 v5 `/ m p" e& \ AJMP DKEY9 |& G+ r2 b$ g* o4 ?( B
DKEY:MOV A,R0; b6 q6 l; k, ] h
ACALL DECODE# g9 M4 d: K, M$ p @
AJMP EKEY
. z6 c: b% m6 Y% J! |DECODE:MOV A,R0) w9 l x6 J5 c0 W6 w T S. z: z; D
MOV B,#04H
, e, z. x0 O! G8 T6 o9 \; l6 \ MUL AB! ~) q/ c& e- Y$ m2 l9 ?
ADD A,R2
0 y! @9 ]( p8 O3 ~ RET
' i) ]; y5 r2 q$ [ BTIME1: PUSH ACC
; `5 n0 s; c! Z' O" u! T PUSH PSW
1 k* G1 | c* d CPL P2.4
- M$ W) ^) |; @ MOV TL1,20H
4 C7 {. W" j( G4 o MOV TH1,21H- Y# w3 L( P I* Q D% V
POP PSW
2 Y$ e! h: K! Y- S# v0 N! K POP ACC
. M4 n6 w/ L& Y8 G) n% g RETI
% h C1 O0 P V V9 p7 w. sTABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777
/ V) D7 o1 O Q DW 64820,64898,64968,65030,65058,65110,65157,65178$ `8 x2 s! F/ n3 }/ \( T
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发表于 2009-10-7 13:40:44
楼主
发表于 2009-10-17 19:54:55
