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本帖最后由 jili1986729 于 2009-10-7 13:42 编辑 : a' ^) b% N& }: U# b# m : M8 c8 g6 q9 h, b. d$ k; q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) [ n; g* q& {3 F% }+ F3 ? 单片机应该用892051,这里89c51,有点浪费; W' G! _* ]/ {9 T
& Z* L" f6 d" h' O- F程序: ! T. i: V8 I4 j' B$ b( o2 H" FORG 00H 4 {* B6 `! n& X: F! b6 RAJMP START 4 o' H5 ~, H1 @% }! j6 `" mORG 001BH 1 P* c! N8 I% [3 E# e- eLJMP TIME1) y% q: A! z% i ORG 30H # E1 m( G8 K( A0 P. QSTART:MOV TMOD,#10H J: L4 i% {8 D2 t" m- [MOV IE,#88H6 m* u% ?0 z8 J Y KEY:SETB F0 : c9 Q7 Q% F5 A7 X K! p, n$ fCLR EA- y4 z# A' D' w2 x) ^ CLR TR1 3 r0 D( R# e% lMOV P1,#0F0H s% d" H, v" ~( i' BKEY1:MOV A,P1! W$ m+ `# ]. U" |) f CPL A . @6 _, o* |2 a. d" V2 c9 ?ANL A,#0F0H & z' x4 J9 \2 q, b% ~8 V, jJZ KEY / W4 `0 h% h' n5 X' T$ T& ]CLR F0 * h* |; h4 L, H* v- YL1: LCALL SKEY4 ]3 b2 N4 y- C- _2 J CLR EA9 a# l2 k a( E3 M' w CLR TR1% ?+ g, X( V* t2 U1 D JB F0,KEY 9 y* o5 M2 B& D) k% f/ ^9 PMOV 22H,A 7 \# {4 p7 s) G, m$ W5 j0 _; uADD A,22H 6 _6 @) D3 `3 B3 jMOV R3,A; C: ~8 J0 i' k. B3 I- r q MOV DPTR,#TABLE1 9 n$ V6 x$ f$ b& e) i4 t4 UMOVC A,@A+DPTR1 ?9 w0 W/ g; B MOV TH1,A" e2 W$ |' s9 j' @4 G' a- i MOV 21H,A$ D; S8 V* K; d7 j6 Z+ s/ O3 a8 J MOV A,R3 + F- M$ |4 d7 z' V7 `6 GINC A/ B9 e) I S S5 V+ k' S) x MOVC A,@A+DPTR ! Y/ g$ [) J8 F: ZMOV TL1,A2 P! l, T- ?: |, M6 ^7 }' D MOV 20H,A 1 r l* F6 f8 E' _, fSETB EA5 ^: c! m& ?# a" v$ U SETB TR1; {+ w% k, I" N3 K5 G L2:CALL SKEY ' {" L- {& ]: |; OSETB EA 9 B. [# `7 X1 @: k2 NSETB TR1' \7 R! K- J ], O JB F0,KEY " f8 p" J$ A' p XLJMP L2 . @0 D, V l9 _SKEY:MOV A,#000 \1 F. G, P6 V* M' d- b5 x MOV R0,A& o# _- B5 _( H MOV R1,A 4 j5 f4 ?! `; e1 xMOV R3,#0FEH 3 O. {) k n( o$ t2 `SKEY2:MOV A,R32 |: |/ M+ U" J2 z7 ~( x MOV P1,A* ^! j/ ]% P6 {$ h& X* F( b NOP * @+ s+ ?2 G, Y2 E. V1 Q% U' c. DNOP - ^) n! d5 s7 WNOP6 E+ K3 J0 Z" i' ^) v+ p% _5 B MOV A,P1 & ]: g+ @1 ?: kMOV R1,A) L2 [; U7 F; Y( z) b6 ]- X- K CPL A/ t j. T! l% W0 N ANL A,#0F0H ; S4 z( Q% X- K2 Z! I% ]S123:JNZ SKEY3/ H4 c+ l: T+ K) q4 B SETB F0 7 v+ v# N1 g+ Y4 }& Z# D! I' L; GINC R0 3 b$ ?$ u! Z: |! o, s" BSETB C 0 Z4 L8 a) I3 j! |/ MMOV A,R3: U' B7 l1 l5 T; Y RLC A# U7 F; [6 T; H MOV R3,A) p! [( `: j7 Z- V# W MOV A,R00 x" `( ?6 ]' n$ q, ~( y CJNE A,#04H,SKEY2 3 y9 H3 K; d, I3 ~" j3 [! dEKEY:RET* W6 h$ y9 E, ]+ x% l0 l SKEY3:CLR F0& Q. b1 z0 ^ V: |8 w# j; }0 P! `# | MOV A,R1( O" ^) e- N9 ]8 L' J JNB ACC.4,SKEY55 Q$ P' y- d7 r' m9 w JNB ACC.5,SKEY6: T; J" u+ q( [ JNB ACC.6,SKEY7 & e% c/ T. @; |, x( M4 ?- t8 mJNB ACC.7,SKEY84 T! B0 m7 c. V% F7 W9 u7 ] AJMP EKEY ) v3 h' s" i8 X+ i0 P) a+ zSKEY5:MOV A,#00H 0 i; n( ]( j3 e1 j4 P1 BMOV R2,A# K8 b" |, n, y AJMP DKEY : w4 H4 i' T) p- tSKEY6:MOV A,#01H& m' U- I% Q! G% M4 [# f MOV R2,A* u! V9 G" X% Q0 P& ? AJMP DKEY, m4 {) y, c9 N' ~. F; C+ H9 u SKEY7:MOV A,#02H 6 X; E; d/ \. ~/ `) R+ ~MOV R2,A: [* e: v: f: l AJMP DKEY 8 C2 w3 p& ~. y K) lSKEY8:MOV A,#03H , t( Y& c6 S5 L6 ]( e9 b) }/ O! ?MOV R2,A+ b, U# h+ p) Y6 V! t: N AJMP DKEY: l- s7 S b+ S3 j, n DKEY:MOV A,R0 , }2 @- S& ]4 I1 G) oACALL DECODE - m4 l% a% f* K4 `/ X- R8 qAJMP EKEY 3 G e' }3 R6 R* v! C, D8 Q2 g' }' ?4 }DECODE:MOV A,R0' K: q$ X1 F% L; h9 E MOV B,#04H+ i1 [" k, p: ]8 {1 Y" } MUL AB; `. v6 j0 \+ [( y# d; o' o6 ^( e ADD A,R22 w9 g; N- k, ^0 r5 t RET' @# @% G$ X* M5 C$ H7 C TIME1: PUSH ACC 2 h; @% \. `3 WPUSH PSW ' }$ l* q$ Z0 r4 ~" p( U2 ~CPL P2.4 5 w A9 _' y5 U" B# b3 P" eMOV TL1,20H & c- B F6 T9 ~' M0 ~/ ~ xMOV TH1,21H0 X. V1 Q5 J. l9 W) M POP PSW ' A- t* A3 \6 rPOP ACC5 w) \3 t. r) t: W: y* ]# ?8 K RETI 8 H2 E, A1 `/ A! q# gTABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777! s7 R$ v7 S8 a w DW 64820,64898,64968,65030,65058,65110,65157,65178 & J+ W4 ~3 |( W6 k/ ~1 `END |
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