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本帖最后由 jili1986729 于 2009-10-7 13:42 編輯
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7 p7 z5 |' L; P6 d% s: R8 k8 }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. k$ g9 o' O, l0 j& J
單片機應該用892051，這里89c51，有點浪費1 _: v# h$ y8 |, o3 _1 Q
2 c: H% `7 `( _& X7 \5 [程序：( e, L! m! E- z5 L/ B4 ]* Z
ORG 00H0 u- w5 q/ G8 m" P- S- J4 H( s" y: w/ ]
AJMP START! U" ~0 _ ]2 o; z) `! `8 D; p
ORG 001BH9 O0 [$ [# R& _9 \% `
LJMP TIME1+ k9 U( a. ]# |
ORG 30H1 T( L1 u( t3 L! M3 y f: c; P
START:MOV TMOD,#10H
' Y5 h; l1 Q# G* r& X MOV IE,#88H: r0 W* [) K! H( I, ^$ M9 v
KEY:SETB F0" G$ o: E# m7 Z9 ?1 y& e7 u8 u: H
CLR EA
3 p- X+ m3 P$ T _5 k+ [* jCLR TR1
6 Y( H# L( W. ?! M) K# S: M: ] MOV P1,#0F0H) Y$ g7 R3 m2 @4 W3 r
KEY1:MOV A,P1% j+ k9 O4 O! n" U3 p! d U
CPL A
: x" n7 g+ U7 `3 y' {' w ANL A,#0F0H, A: @/ V2 D+ u$ |7 R, ^
JZ KEY. H5 m" B! o9 A+ z* F4 R6 D! h
CLR F05 h) l+ O8 r9 J2 p2 i8 Z& P
L1: LCALL SKEY$ a" y3 ^2 b8 Z$ p( F/ m% p1 o
CLR EA) `" m8 M3 X9 j' l, L$ f( r
CLR TR1" C0 F8 |; V [
JB F0,KEY: C: l: R+ f0 k" ]& W4 T
MOV 22H,A0 T7 r9 q" P' Z
ADD A,22H
% q9 d% K3 O* @4 Q0 p: z MOV R3,A
3 j3 ?: _" b2 ~7 D MOV DPTR,#TABLE1
8 O* X( {7 W( ~/ i0 K! g6 [7 u MOVC A,@A+DPTR
X/ p$ t6 O# S, X* c MOV TH1,A( h, P- D8 {# x" B; t! V. ~: J# O
MOV 21H,A+ n O. t0 W/ G1 g/ M9 w; j4 F
MOV A,R33 X" u+ ~( }5 c0 N
INC A: I6 m& M! y9 D- ^6 [3 M
MOVC A,@A+DPTR7 ^ N ? Z5 f0 X- d
MOV TL1,A+ m8 t# ^% t5 w# G1 C+ e# _
MOV 20H,A2 X6 u( `" n& {+ u% J9 n
SETB EA
& X; M& G) p8 r SETB TR1
# j6 ?+ }9 D0 B8 {- zL2:CALL SKEY0 I4 U7 W# o2 c( D( X- B5 K
SETB EA+ |" b# B- w* @1 |) l
SETB TR1
6 d7 A. g' d+ q$ v4 | JB F0,KEY- g0 C: d% {) z/ C& c* b6 A% r
LJMP L2
1 {! O1 `( {7 ^- G) bSKEY:MOV A,#003 [8 Z& ~; }0 f: o- u
MOV R0,A
2 l3 @$ p8 B: \: n/ E MOV R1,A
! S9 ?% W u$ W' H5 w5 P MOV R3,#0FEH
1 [8 K$ {9 {" R" ~+ ZSKEY2:MOV A,R3
, y3 A- `( \ r# J MOV P1,A& v B* m% R' R5 ~4 I5 O, e5 w
NOP! O% |" B0 l$ A
NOP
; S* U9 g( }+ P6 M! u NOP
6 J8 M/ m* J: R m( D* s! s MOV A,P1' _& d; F& L6 w* W' X
MOV R1,A' ^2 v- v- b' a
CPL A0 ?! h# \- d# {; q+ h
ANL A,#0F0H
1 c7 \/ U$ H# l3 e9 _3 K( C9 zS123:JNZ SKEY3
( N' d/ H9 O4 g, ^) H SETB F01 e8 a- ^! n" i- p% }! u% Y0 e
INC R06 }4 |( l$ y/ }. ] ^: T$ Q! e
SETB C/ g, B! X5 D! \* M+ o( m' S: n, Z
MOV A,R30 M4 n+ _( }/ a: B( Y# o1 ?! g
RLC A) W/ U9 t; n: F1 a& _. }
MOV R3,A
7 E2 M$ |3 t4 G) D+ h8 w/ Y% v MOV A,R0& K! z$ D& m9 Z* N+ E5 r6 K/ L/ n
CJNE A,#04H,SKEY2
" ^" N+ J1 D9 L t# i2 b/ x# l4 CEKEY:RET* l+ k/ a3 d! g4 U; D- C
SKEY3:CLR F0$ T8 G+ Z7 t( W1 r
MOV A,R16 T" Z# Y3 r" Z8 W; N
JNB ACC.4,SKEY5
- s4 e. H: i6 l g6 V JNB ACC.5,SKEY6
4 s9 `& J+ B5 `4 e* r6 @ JNB ACC.6,SKEY7
5 Y0 Y& r8 m- k! B, o ~8 T, B JNB ACC.7,SKEY8
- z, J. \" y7 m. [; q AJMP EKEY
$ \" g% U' Y7 S2 l2 G2 B0 GSKEY5:MOV A,#00H, k; i$ I, E, n$ j4 Q
MOV R2,A3 t& K4 a' V! n6 p) b4 s/ S
AJMP DKEY: v( ?& _7 G% n$ X: I
SKEY6:MOV A,#01H
* X# Q. a9 y8 Q& J. ^3 k MOV R2,A
; d* H* \ y& Z! |2 Y( w AJMP DKEY5 a5 G" z; u, ?' a
SKEY7:MOV A,#02H0 D( V6 W1 G8 K' T2 A
MOV R2,A' F7 C* U+ x/ N0 t
AJMP DKEY
9 U5 N) }( p; \5 m! WSKEY8:MOV A,#03H
' i% A4 I: ~( m. ?0 t MOV R2,A0 b8 @- }5 S- r" V; P
AJMP DKEY# f) h2 v7 F" P
DKEY:MOV A,R05 |% p) z2 s2 x u: M
ACALL DECODE
0 ~& h. p: b; y AJMP EKEY% }0 H n( b' r2 E" n. ^
DECODE:MOV A,R0; X/ ^" J! h; e: |+ _) _/ a) {! _8 H. z
MOV B,#04H& Q* X. l1 ^% ^' ~
MUL AB8 C. V9 l- C* |: C+ t2 ^
ADD A,R28 V6 O* r/ t. B6 Z2 S+ [
RET
2 V# F7 X( N! h6 \1 o6 }TIME1: PUSH ACC
& d6 k6 I6 ? X5 q7 g& D) \8 f PUSH PSW% D8 t( \$ [( k2 [
CPL P2.4
5 {4 L8 Y2 Q6 }; n. c$ d5 O) a+ Y& T8 | MOV TL1,20H0 \1 b% v. W( T# _& @9 w
MOV TH1,21H
( }# Q( E& i! b4 U$ G POP PSW. I. Y$ r6 w! `8 r& O$ r' b
POP ACC
+ g! r; e4 J# ^9 q5 H RETI4 k% \1 Z3 _$ T9 ^
TABLE1: DW 64021,64103,64260,64400,64524,64580,64684,64777) u+ p) y% f1 @& b% p4 Y
DW 64820,64898,64968,65030,65058,65110,65157,65178
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發表于 2009-10-7 13:40:44
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發表于 2009-10-17 19:54:55
