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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
9 X& C: e+ D; S# u: Q' F4 F单片机应该用892051,这里89c51,有点浪费" i& y) l! U4 r
; [& {. q+ g8 z5 i7 a! B( G9 Y+ V程序:) c3 p- Q7 ?" }8 G3 Y
ORG 00H
* q; C, a, L* E% _) mAJMP START; B( P; m7 Y5 t0 }5 p# I$ [
ORG 001BH
8 N1 O7 @9 t' x) ]LJMP TIME1
( G8 z# t- L+ h6 n% H& bORG 30H# h5 x4 U' c$ }$ ^6 Y9 E0 p
START:MOV TMOD,#10H, _$ k1 j/ ^8 _: O1 d& m
MOV IE,#88H
. q! b$ y# p$ @" rKEY:SETB F0
w, `7 D. e# Z$ p+ u3 s- [6 v& ` CLR EA4 s# B$ v5 Q- B" V% N( V$ l% N
CLR TR1
) u' M9 b- d! \* i8 P W MOV P1,#0F0H, w* E/ H4 K% N/ W
KEY1:MOV A,P1
) H [9 H7 G* X CPL A$ \+ R6 U$ m4 G0 C0 c0 F/ k8 g
ANL A,#0F0H
9 Z0 [# ?* {. {5 A* t% m" M JZ KEY- J( f$ P; j. x) v3 N" t/ B) Y
CLR F0; q# I0 A4 w. X5 g9 _
L1: LCALL SKEY
- S3 X% B4 z9 n6 I* l5 ] CLR EA
% H7 S1 J2 g9 m0 O6 g+ u+ l CLR TR1
, j4 g! c. E5 ]! i) F JB F0,KEY9 C3 F# f# |# c5 Q- u& i0 p& g$ N
MOV 22H,A1 L3 k0 b5 I1 U+ ]( a
ADD A,22H
' ^# F/ C& x0 z0 o3 p MOV R3,A! u5 z. i0 M, g2 V6 o
MOV DPTR,#TABLE1
, E: g/ y0 v$ m3 g1 ] MOVC A,@A+DPTR
/ l, p. Q" I$ I9 J: }# a MOV TH1,A
3 E# \$ x5 ~( D4 s4 Y) {5 P+ Z MOV 21H,A
: l- |+ J* {$ O9 V9 m* K" Q MOV A,R31 l! u, S) D3 ?3 C
INC A4 @5 i {" X6 b
MOVC A,@A+DPTR! m* K7 s3 i) Z3 g
MOV TL1,A) m4 F/ Y* E: W/ p9 B$ p! ~$ t
MOV 20H,A9 o# u8 n% e. X* m. X1 ?
SETB EA
5 H% |8 v+ j- f0 a& c0 ]! {( g SETB TR10 b a2 E- h! R3 r) T+ b, n7 u
L2:CALL SKEY. A3 v4 A2 o0 _, ~7 |
SETB EA
# w3 t. ]9 n0 v# Y+ | SETB TR1/ X+ V: U7 h( a3 U2 m( A2 i
JB F0,KEY
: G- i! Z* m( ]( m LJMP L2, _( D$ d5 o; g0 s+ N+ u9 h; x! j
SKEY:MOV A,#00
) ?; u- H& {$ G1 c$ _8 z7 ~$ C: Q MOV R0,A
* S C' D6 ~. i$ J' I- \/ U MOV R1,A: n% Z/ Z: a5 Y9 w
MOV R3,#0FEH3 B$ K! i+ C+ a1 b, |
SKEY2:MOV A,R3
" M! Z- }7 W3 a MOV P1,A5 ^* L8 t9 F3 t b
NOP% n5 d' H- }. @
NOP# ~+ V# p3 A1 h8 P
NOP2 v' \. d$ V" V9 M( @% ^' K
MOV A,P12 h' i# a" W y4 B( T" ~% b8 s
MOV R1,A+ ?9 a# ?$ L& Z a5 R
CPL A( X% Y# u+ X& ? ?4 _5 {
ANL A,#0F0H5 i3 W3 O* t" B m6 X2 ]
S123:JNZ SKEY32 Y- P. `! J" k$ \! d# n8 r3 B
SETB F0" D+ I' K: {& p- m T
INC R0& u! J& {% W4 z5 {0 [- P! B
SETB C& q& u9 a! T7 G
MOV A,R3! W) Z! n8 V* o9 ~1 I
RLC A
0 |( ]" n' @* B# E, Q5 E7 x# Z MOV R3,A
' Q2 G$ M5 @# R1 w MOV A,R0) x+ ?5 k0 f3 O. v+ b
CJNE A,#04H,SKEY2
0 [' B; q4 O' ^" Y( p3 c7 vEKEY:RET- _" q$ P9 L" R* a
SKEY3:CLR F0/ ?4 ]; T5 G# E3 |' m; w5 Y+ A
MOV A,R1
7 [; ]: V* v* n& M* S. G/ i JNB ACC.4,SKEY5
- A4 n' G2 l. S: v JNB ACC.5,SKEY6
/ Q8 ?9 Z) u1 m1 K: ~$ t JNB ACC.6,SKEY7
: ~# r0 v/ K R" k/ f7 x JNB ACC.7,SKEY8
4 ?/ r2 I* |7 f# q- d# N3 q AJMP EKEY
F+ x! ^! D* u! _4 FSKEY5:MOV A,#00H
2 k8 L5 q1 y' P# P6 {9 U MOV R2,A
$ R$ o+ ]' L9 s& x$ E9 M Z AJMP DKEY
0 J2 y' c i3 Z @9 RSKEY6:MOV A,#01H+ q% O3 l# T4 j. E2 _4 i8 U" L
MOV R2,A1 Z5 w- I% y8 j7 [( v
AJMP DKEY) i. q3 T# N; Z' l9 d ~$ f
SKEY7:MOV A,#02H
9 u* H: V9 F7 J! f" ?) S MOV R2,A
- T( f$ h/ A S+ `% j AJMP DKEY9 K% Z. R$ R: R" D) U
SKEY8:MOV A,#03H
4 x" j5 u' [# ^" z, B2 E, m MOV R2,A4 `' c: M- P/ Y% } ~
AJMP DKEY3 p3 L9 v6 U) n4 w5 M+ x9 P% X
DKEY:MOV A,R04 L6 B% o( T8 L5 M
ACALL DECODE
0 ]3 k" Z& ^* V- q AJMP EKEY
1 b3 C: t8 z m+ mDECODE:MOV A,R0 H9 ]' z* K* z% R: S. E( h- ^
MOV B,#04H
8 t5 n$ b3 c/ M MUL AB
4 U; I; I; ~- X1 Z y' l% e ADD A,R2
6 A1 O, E" C* v/ P' v/ q RET2 s$ E- g6 U! K$ r, d$ b" v0 q
TIME1: PUSH ACC
9 Y- [1 {" S$ M- k0 r2 l9 X PUSH PSW
* a6 h( f- c( X CPL P2.48 ^$ u/ v& w/ l' w
MOV TL1,20H
/ p7 w7 Y* U# T, r2 p MOV TH1,21H- c; A9 U9 Q ], l d- H
POP PSW1 \( _; S5 o& Y/ M( R( U
POP ACC
) v8 u' x# d, l( V3 }& g RETI: i' Q0 B, c. V, X; I
TABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777
2 {; \7 Q/ H9 I DW 64820,64898,64968,65030,65058,65110,65157,65178
" Q, ]3 U: m* I+ e, yEND |
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