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本帖最后由 jili1986729 于 2009-10-7 13:42 編輯 ! T5 F* Y g- q; r2 M: b1 l, R
i8 G4 u( F" E. X* K; s$ }5 b$ a我自己用單片機做的電子琴,比較簡單,用了一個功放,自己做了個矩陣鍵盤2 E6 p" O b0 Q! I! @" ]4 _
單片機應(yīng)該用892051,這里89c51,有點浪費
# j6 _7 Z7 V" y: ]" W5 K) k, M) k3 |6 @% t0 ^
程序:. A2 R1 P1 u" |$ v/ K' K# B' A6 n7 s
ORG 00H
. F0 g+ {: ]+ _! D! i* ]$ s8 b+ r& mAJMP START: s+ [9 `, s" {& L7 I! y0 q
ORG 001BH) l* P0 A: t. w9 p) c
LJMP TIME1& x: ]( }# y& u+ a' o
ORG 30H
* q" H3 A* T7 sSTART:MOV TMOD,#10H" I9 Q9 Y4 y2 l2 Y3 Z
MOV IE,#88H2 _/ t; q& H0 E: P* |* f! T* ], J
KEY:SETB F0' E1 j% y9 a# Y/ l
CLR EA
1 z5 N1 \! A* }# X/ Y/ a4 qCLR TR1* a* z: c9 I/ l& o% k# ]( e
MOV P1,#0F0H
' R8 R' x n! N& f/ V a+ q! IKEY1:MOV A,P1+ C1 O7 G! p/ f% F( B6 l
CPL A: Q1 Y* r5 w) U# a$ K2 a& t7 ^6 c
ANL A,#0F0H2 n/ Y& u7 f5 m( a" a# \; O+ {
JZ KEY1 w0 k( t9 U' I- [. ^; [0 n& ?% K
CLR F0
/ R+ _: @5 o- Q. v8 ?L1: LCALL SKEY7 {& z8 L( n7 V; t3 ^
CLR EA
1 N |9 h* _. Z- {2 n CLR TR1
& T7 g* G6 v" ~$ v JB F0,KEY; N0 Q. H+ |! l$ f" G
MOV 22H,A
# P+ |% A+ q, n% u$ t) z ADD A,22H
" ?. s& r1 T U! W8 d MOV R3,A% r2 K, v& k7 J: Z' G& _
MOV DPTR,#TABLE1
8 y8 x7 k7 _ C/ t8 ~ MOVC A,@A+DPTR) x& Y: M* C" b4 B# e
MOV TH1,A
' g/ i( L9 M6 b8 I1 ?2 L% m5 z MOV 21H,A
" ^; l2 h# ?0 U9 a/ S MOV A,R3
/ f) `' `; P2 b6 F1 c! \ INC A
8 H3 t# g' r2 o) ]( j$ X MOVC A,@A+DPTR
+ S6 z9 ?- a' W7 @! {( u MOV TL1,A
" S5 g; Y- ^% d0 ?# L: W' s* t MOV 20H,A
1 X. ?. j& `; {, d SETB EA
5 j( p0 {" \. ?( d- y, D! h- j5 _ SETB TR1
1 c! x( Q: g( u1 y! ?! r3 H1 DL2:CALL SKEY
5 l$ L" \5 m5 t2 |: ~0 H2 I/ H) ]+ F SETB EA
9 N$ q/ A( V; ~9 z* U SETB TR1& `( A3 [6 m" [2 U" Q& w1 }& v6 g% ^) G
JB F0,KEY. |. a8 O7 y6 D( U! o! N
LJMP L2' X. P6 Q+ e- V* u' @) i. t
SKEY:MOV A,#00
. [$ b& u7 ^7 a6 F/ A" X MOV R0,A) q# W ]/ Y9 `
MOV R1,A+ H( l" P# l* t
MOV R3,#0FEH
, p( c: p* C) b' I8 x! sSKEY2:MOV A,R3
+ p- O5 b, C' G9 X5 w3 M5 {; R9 r' t MOV P1,A- Q; u& Z" u3 ?. j% [( X
NOP
5 `0 M+ i6 @4 [+ f l3 A NOP
0 k" ]( c" N" S$ l NOP2 E. u) b/ g" ^; g. ^) |
MOV A,P1
9 g6 C. q( l# r% f! h% V MOV R1,A" P7 B `: w1 p. e! B X0 V" @$ Z' y
CPL A
/ }5 e9 X R5 ]9 A8 y ANL A,#0F0H
' B: Y% t- t" ^5 g# @- i# eS123:JNZ SKEY36 M" Y5 A1 X! N2 A" K
SETB F0, l7 f% s( J# L
INC R0
* ?! P$ i) g6 n g3 |/ _3 R SETB C
5 h- g" Q- m" w9 h) H7 K$ l1 O MOV A,R3( J* V+ Z6 _# c
RLC A
2 B. a* G4 S2 w h6 N; j MOV R3,A2 R- s5 {8 \. }: [/ p
MOV A,R0+ c5 @$ \+ _0 q% v C
CJNE A,#04H,SKEY2
9 t" D/ s8 ?- o9 A7 A! x# eEKEY:RET
3 s" r. G5 r3 J0 h( @# G! i* mSKEY3:CLR F0, x+ K* ?4 [' ?5 ]
MOV A,R1
" j2 ]3 s4 |9 T4 D3 B& d+ h2 X r2 ?# ] JNB ACC.4,SKEY51 ~6 y- C* B0 Z* \: F
JNB ACC.5,SKEY6
% U! t" L9 Q p& ]1 s8 n7 [' f JNB ACC.6,SKEY71 z4 y' s/ t0 f1 C& H R
JNB ACC.7,SKEY89 |2 y! R' O9 Z/ S
AJMP EKEY! h9 ~# F# _0 @
SKEY5:MOV A,#00H
1 |+ [- y1 A" ^. X) O MOV R2,A0 c; G2 G8 b. x4 n. p" j
AJMP DKEY# z( z6 Y# r1 B7 Y. P9 c
SKEY6:MOV A,#01H
) r. u n% a' d; x2 Q2 |8 h MOV R2,A
6 j# K( z( o- A2 w AJMP DKEY
5 V8 w: P( N; q3 c$ o, S* xSKEY7:MOV A,#02H
- G# J7 F0 ], P+ H MOV R2,A9 z0 }" Q) g( ~$ w
AJMP DKEY( N, h5 V- x# t& @1 G1 ~
SKEY8:MOV A,#03H
" n' |: f% M& I0 {" c MOV R2,A
R% Z6 _3 O# L f" p/ H AJMP DKEY8 h) }) A% w! l* ^ L0 i
DKEY:MOV A,R0
* k5 Q- i5 F8 [# `: X. J; D ACALL DECODE% b5 {5 i/ g/ V9 Y( Q0 c
AJMP EKEY
8 G! J2 a* f' p, _) n4 GDECODE:MOV A,R0( B" V( d6 t# h7 H7 g3 M, M
MOV B,#04H
" l% f D( I( r2 l MUL AB9 ^$ R+ t: N9 p x: p, K
ADD A,R2: f: p7 ?, x u X: p$ [
RET
J' E0 l- Z9 _5 Z7 R: ~, R" A' U) KTIME1: PUSH ACC
j! S9 J0 O! ^, ^8 N1 M+ p PUSH PSW
8 Z$ C) r. V; m; b+ v) m CPL P2.4" V( _+ }) C# c e
MOV TL1,20H, ?5 y' g0 B! S$ S1 r
MOV TH1,21H
3 b2 F. | o+ }6 k3 M POP PSW
& S, d+ M5 R- L* \, W POP ACC
& O5 n: O5 Q" g* i, t1 f RETI" U8 X& X3 c) m/ s: h
TABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777
: I! T: n. ?, ]; X+ w J- { DW 64820,64898,64968,65030,65058,65110,65157,65178
$ m6 O8 y: E/ H& t1 V' C* JEND |
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