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本帖最后由 jili1986729 于 2009-10-7 13:42 编辑
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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
* w+ ?/ m. f. X! `' G' H: f单片机应该用892051，这里89c51，有点浪费
* f- N+ A3 \+ j/ \$ \) o( f8 D% k* P& d# }
程序：
9 C+ f9 A" l+ q+ ?! g. D' aORG 00H
7 f: V5 l3 t2 i EAJMP START
3 Y1 C F4 D6 WORG 001BH
, g U l! I3 oLJMP TIME1
0 X0 e/ f5 }/ t1 qORG 30H& J: U0 l5 [) k$ G- o g# _, C
START:MOV TMOD,#10H1 |) b! D/ b$ N8 o' B
MOV IE,#88H
$ ~5 Y9 a- h1 {. ^; \5 L" {' @KEY:SETB F0) J/ J# J& {5 M
CLR EA8 B v! p8 }. C0 C0 v
CLR TR1. c4 X% X K2 J' L7 A* |" ?2 c
MOV P1,#0F0H% F; N( P7 K$ w$ H( T
KEY1:MOV A,P1: I! e, k* R. S9 K4 P' b6 H
CPL A( M0 j" t8 k0 q4 V
ANL A,#0F0H
0 W- j; N& c0 G3 r JZ KEY: W I, N0 U2 o& ^7 S4 v
CLR F03 f. R$ J) h: ^% x# K9 E
L1: LCALL SKEY
7 @5 g0 W( `2 R4 N* w CLR EA* e X: t' {. \, P: L+ Q5 B
CLR TR1$ F/ ?. M5 k! Z8 ^- c g2 u
JB F0,KEY( D/ ?3 c5 V+ l; [
MOV 22H,A
0 `; H# ~0 h+ a4 X( E ADD A,22H
$ h2 E. c% s! S% x8 L, p MOV R3,A9 W7 }, q6 p7 e! A6 y& } K
MOV DPTR,#TABLE1
/ |- c4 Q2 D& T5 r8 Q MOVC A,@A+DPTR
& a+ _$ ~1 \1 `' B/ l MOV TH1,A
) z! O" K3 H6 R9 l, }, K MOV 21H,A+ S( N# K& v( q9 Z1 O% f
MOV A,R37 u+ }' k0 L% h/ n2 o
INC A
* Z. M: r- ?, ~& i MOVC A,@A+DPTR! N; m# Y( ?: _1 z( G
MOV TL1,A0 h) ^6 a5 O9 f i" ^3 H0 H3 {
MOV 20H,A
9 P# r2 G5 ]4 V9 I, }% ? SETB EA' n9 _) G( k u- g9 U
SETB TR1; G, y" ?2 `/ k5 J4 y# O
L2:CALL SKEY6 r+ {. ?9 c) l0 D, ~+ b
SETB EA
3 \2 }* J& w4 s7 C) A SETB TR1
6 ~5 b3 B& F% d) c: D. |& R* n9 o JB F0,KEY
& @& h0 T5 g6 a* r' O- @1 t0 N LJMP L23 s1 y. R1 \5 L9 H6 y# |3 t
SKEY:MOV A,#00. _: C$ K6 E1 a" o
MOV R0,A
! U4 L3 @9 S: a5 V2 M MOV R1,A% R2 X2 d% G5 S2 u" o
MOV R3,#0FEH( c) m7 j9 q2 S, k& _; [0 U
SKEY2:MOV A,R3
b. T: P9 G% w; z MOV P1,A
6 b/ r( W* Y2 W$ u: X) a. a NOP% R+ Z" O/ V$ V1 ^$ b
NOP
% w9 ?+ [! {2 f. ?7 s. q" b% `% O NOP1 @4 J& C1 q. g* ~
MOV A,P1( I. P4 c w$ @2 R. T
MOV R1,A
4 ?" s8 n9 @3 S; _ CPL A% f z" W% x0 K) ~, U+ W1 D
ANL A,#0F0H( F- `* B' y1 e4 n2 f# k& X7 n
S123:JNZ SKEY3
5 ]7 ]- T& o9 b5 K6 d3 r SETB F0
' [0 w- |# c4 k, t INC R0: m$ n. B! v7 R1 s5 r: h7 `
SETB C
3 V) r# G( X9 G) r MOV A,R39 t! i6 N7 n* s5 j M, a
RLC A
$ k9 j) }' ]! ?9 h4 \ MOV R3,A
5 Z8 H6 x1 F- P5 u" v' c MOV A,R0& A) i2 }8 v' p% _$ U
CJNE A,#04H,SKEY2: P1 q" U M. M
EKEY:RET: {/ K3 }: ?2 O
SKEY3:CLR F09 E5 R7 M* |, {
MOV A,R1* P% D. l: c" Y: g5 J- l
JNB ACC.4,SKEY5
9 T2 I6 F+ E1 b, a) i JNB ACC.5,SKEY6
( E& A: A$ G) y) |9 }9 `& F JNB ACC.6,SKEY7% t5 p0 \6 j9 F' q: z
JNB ACC.7,SKEY8; Q! a/ S# R1 | d
AJMP EKEY
4 y) V; @4 W/ q: S& Z( ~SKEY5:MOV A,#00H
. D# c$ \/ O& X, @% I MOV R2,A, O% q7 N; \! F4 N# p% d+ W3 r
AJMP DKEY+ D/ E. c# Y1 z i: z
SKEY6:MOV A,#01H
6 ~0 K9 `5 l. n" N7 Q- v- r MOV R2,A* O- V5 u: e7 s$ O% |: G
AJMP DKEY/ r$ K! B9 m. |1 n
SKEY7:MOV A,#02H# H8 i& O; y* g; d- O$ k. ^
MOV R2,A
+ J* P: i! s3 B P, I' Z AJMP DKEY
1 C5 [* |+ n" R0 iSKEY8:MOV A,#03H
. V2 ~! f' x- B; S MOV R2,A
+ H5 u, `) ^ b AJMP DKEY8 [( ]& W2 J! |, I" ~6 D
DKEY:MOV A,R00 D% Q- a* w+ s: I
ACALL DECODE$ R( D7 ~1 f V# `! ^- ~0 s+ D
AJMP EKEY
5 h" T+ Z) x' \* p0 s8 cDECODE:MOV A,R0
( k1 e& [4 y, U/ Y MOV B,#04H
6 l& Z% d/ O3 {5 f! c9 i MUL AB2 B# U0 {6 F3 ^1 V4 n9 s
ADD A,R21 Z" k, |" s6 M2 W: A
RET
9 \7 J% b/ y; E' s# {; U5 Q8 Q6 VTIME1: PUSH ACC$ J: `4 o! l7 q# O5 \8 d% V
PUSH PSW
+ a L. r2 ] ~# Y CPL P2.4& Y# ~7 U6 o! x4 J9 ^. V6 @8 F. E
MOV TL1,20H
0 Q6 v3 r3 Z% _' _ P/ N MOV TH1,21H/ }$ c$ ^4 C+ \8 r4 F; Q9 M- Y7 s4 O4 h
POP PSW" E! D- O; z! \+ D! o& E2 s
POP ACC
4 ^) R, F+ B5 M& ^0 ` RETI# k! k/ W% P8 m' W4 e
TABLE1: DW 64021,64103,64260,64400,64524,64580,64684,647775 ~# s; { v+ B( r5 ?
DW 64820,64898,64968,65030,65058,65110,65157,651784 w5 d- _* B' p6 v1 v! d
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发表于 2009-10-7 13:40:44
发表于 2009-10-17 19:54:55
