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本帖最后由 jili1986729 于 2009-10-7 13:42 编辑 - U }$ g& V' j' b. u i5 H
( R' f: X. L$ `3 H! d$ F3 A8 M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
8 ]& x/ Q; W. w; N5 o9 g单片机应该用892051,这里89c51,有点浪费5 }3 j8 W' K/ P; p `$ f2 c, ]
( f# [6 c2 V- c/ g; A9 y) g- V, d
程序:
Q3 y W5 ^+ t, XORG 00H; C% k3 }1 ?6 i% w1 n, ?
AJMP START
% N% U1 Q3 H/ R3 L7 MORG 001BH
R r {2 Z7 _LJMP TIME1- @* a1 \: s! j1 D' R
ORG 30H
6 {8 K: S% V* F, t8 W; }# TSTART:MOV TMOD,#10H
6 H6 A( Y- B+ K% g MOV IE,#88H8 G, \ p9 `6 h5 P$ e+ q0 } A1 Z
KEY:SETB F01 T! G2 P" W# A
CLR EA) R$ W! B5 [% @, ] M2 Y; h1 a* v
CLR TR1
; {' G) c, g% U9 I3 h q MOV P1,#0F0H J9 Z0 o" R a
KEY1:MOV A,P17 L% M5 _7 R+ B, ], S
CPL A/ |: l0 p* W- Q! Q) b* Q* G
ANL A,#0F0H5 `6 G3 ]& K3 r* s+ |
JZ KEY" r5 ? w- ?5 [. J/ C
CLR F0. P v; Y3 O$ f4 w
L1: LCALL SKEY/ a& [+ b3 Z L& H) y, r, l
CLR EA
9 z2 {3 j- w. E1 G/ N CLR TR1. g: ^# k0 J4 j3 r7 k
JB F0,KEY) f7 N; J2 S6 Q( W+ y
MOV 22H,A
7 W& h) [: R7 q4 Z& j ADD A,22H* m' ]* x9 y% L, x. u1 ^
MOV R3,A% I4 A7 y. _6 k6 q* w P. N
MOV DPTR,#TABLE1
6 Y$ x; d- o+ s5 G2 M: ? MOVC A,@A+DPTR& R2 j% N# ~+ s
MOV TH1,A$ |- n. n/ o u* U
MOV 21H,A# C4 Y3 x" G. \( c+ r9 F
MOV A,R3
7 }% ^: x6 Y1 F INC A% h @# U) M( u% g' \
MOVC A,@A+DPTR
$ W/ ^7 H. ~ ]2 [$ M+ u! X! a R MOV TL1,A
9 }" B" r, r0 [ t MOV 20H,A7 k+ k) @, ^; m" E& E
SETB EA1 X& [0 }8 [3 M
SETB TR1
$ J. `7 Z0 Y5 t% Y. M# L- a8 rL2:CALL SKEY
% L% ^) D- X6 P SETB EA7 A* l) p2 R, f3 l& ~+ R+ A
SETB TR1" E9 m9 W, a& Q4 s1 F
JB F0,KEY
/ p& Z a$ t. m/ h LJMP L2+ e& v B! i! ^# t! h
SKEY:MOV A,#006 {6 y: F1 t" m+ y1 H% C; y. g
MOV R0,A+ ~+ ?. _1 w+ S, m1 i2 w/ h
MOV R1,A
2 k0 k/ `/ E5 [; t MOV R3,#0FEH" F+ Z. p$ r2 p8 o
SKEY2:MOV A,R3
3 J+ Q/ O# ~" o% U% M, H5 o3 f MOV P1,A8 D) E: t8 e: \8 m5 u, y
NOP
* n" }% X+ ^3 Q3 \ z NOP
1 D$ ]; l2 x2 v" C i8 z1 P NOP4 p. \+ u; n0 j5 N; j. j9 H3 _6 f" f
MOV A,P1
. G5 `, u8 s8 S! _/ S MOV R1,A
+ L/ K8 {, E! e3 M- L CPL A5 R* K5 [' @+ m: v0 N: `
ANL A,#0F0H) A6 f l/ W5 Q$ P: V
S123:JNZ SKEY3! T, A" X$ T5 R% k a* @& T9 H
SETB F0
9 K( _) l5 p& L INC R0
: x- r) d, Q$ H7 t$ Y SETB C0 ?# K1 D1 ^ }& J. B
MOV A,R38 p( n2 I5 `9 f. T0 c9 e' N- F1 n
RLC A0 T5 }; L$ N' C/ n1 A( u
MOV R3,A
" P4 }0 }! N2 S MOV A,R01 X3 E) k" ~+ C ^
CJNE A,#04H,SKEY2
0 P- [, R+ E5 ?; x1 ]EKEY:RET
. d; `8 K- |$ }6 _( I/ sSKEY3:CLR F0 G& u( I, K- _; Y0 c4 z: \
MOV A,R1
: ^/ O: `7 q" s JNB ACC.4,SKEY5. M" Z9 m% x5 \+ Q+ U# i
JNB ACC.5,SKEY6
/ B. O3 Y: e% i JNB ACC.6,SKEY7 Q8 O) c/ x! F5 ]) A; H
JNB ACC.7,SKEY8
1 m& j: }0 W# F% ^, s, Z2 F+ O! a AJMP EKEY2 W0 T" [. Y; B5 d2 g# H5 h# `( F
SKEY5:MOV A,#00H+ U& R( H1 `5 ]8 E+ j- ^
MOV R2,A
8 B6 w* Y$ X! { W9 M4 q7 v+ c3 S AJMP DKEY) r) ~% W, |; ?# }% p3 [
SKEY6:MOV A,#01H5 f5 ~$ n; z) i# C) a9 J! G
MOV R2,A2 t# E5 [5 x& ^3 |5 T5 P* L# H- v
AJMP DKEY9 _1 q! E! R% b
SKEY7:MOV A,#02H
$ b5 U4 I/ j7 T2 n0 O% X MOV R2,A
5 r6 i' |* w ?# X: L+ g+ D AJMP DKEY7 a2 l5 \8 {% b3 Q1 X$ x7 c( ]
SKEY8:MOV A,#03H7 ?' Q$ H. s, e4 I l: T
MOV R2,A |4 w7 _% V3 |* [
AJMP DKEY9 |3 o1 M4 r' u, u9 p; U; l/ n1 ]
DKEY:MOV A,R0
8 i2 k5 x& a. C; R* W0 L: G! A ACALL DECODE
( g* d7 p1 h6 w* \4 T AJMP EKEY
6 ?: |; _' [: y* |% T" }4 M" ADECODE:MOV A,R01 }& [# j$ e+ s( O, D
MOV B,#04H$ g/ J$ I. E. Z- Q( b' x& }
MUL AB
4 C1 S9 D9 J, q+ R7 x: V) i ADD A,R2: R' c5 q- S/ _- b
RET2 W- \2 i7 [- p& h, w
TIME1: PUSH ACC
* X* Q# x$ ?7 x5 F PUSH PSW
0 P% ]# @/ {+ H2 {0 Q CPL P2.49 W t( u/ M* c u9 I6 q. f
MOV TL1,20H
3 F7 m, x& P% h MOV TH1,21H9 n: i$ c' _: z$ G4 C+ f
POP PSW; \0 ^& q8 A _' ?- u+ H' h S8 ^
POP ACC
1 l; G4 h7 P- M/ T! w- [2 o RETI
% `( v6 k! b+ @8 G0 F/ \% M- VTABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777
6 l0 d% x4 u2 m3 ~ DW 64820,64898,64968,65030,65058,65110,65157,65178& p7 ]$ l5 m4 A# v& X
END |
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