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51单片机加法器的制作, i$ X4 Y2 N5 I# @
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9 E) p1 M5 I2 Q# z完成数码管显示，按键相加的要求/ ^8 E; g; O7 J
此程序的电路图下载：
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8 @* g$ o$ O; x/ ^& Z只需要看数码管部分即可，其他部分可忽略掉. ) w2 D0 W8 D0 D2 i+ ^4 X) ~9 v
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代码如下：#include<reg52.h>
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2 l+ N7 Q- G* n; n, Esbit ADDR0 = P1^0;
% ], A: P) b% u* Q4 t7 c+ vsbit ADDR1 = P1^1;3 y7 p0 P$ P+ y* z, M' p( l' H
sbit ADDR2 = P1^2;
. u6 U3 L, u. c$ _4 ? qsbit ADDR3 = P1^3;
: A7 a4 y: U7 Q" N: Lsbit ENLED = P1^4;
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sbit KEY_IN_1 = P2^4;
9 ]6 J8 J# B9 q5 r# b) m0 ]' v$ Xsbit KEY_IN_2 = P2^5;
F' z+ c3 P) A9 Y0 gsbit KEY_IN_3 = P2^6;
; }' i; P2 O& N0 l% L* dsbit KEY_IN_4 = P2^7;
5 ]: J# F R* y+ g8 S. d- C% ksbit KEY_OUT_1 = P2^3;
/ Q2 a; ~! D7 m5 s; csbit KEY_OUT_2 = P2^2;+ _: s2 m- j# O2 S9 H% M; }
sbit KEY_OUT_3 = P2^1;
) i) M# |/ D2 d$ ^sbit KEY_OUT_4 = P2^0;5 E! T; _$ r6 }( l! \
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unsigned char code LedChar[]={
& f5 a) B+ U- s' o1 s 0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, N! f8 m5 u" I+ Q* X
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E! x* o" T1 @) a0 P
};
6 _0 D& R5 C" Y6 \7 ]& I: ]+ K% Yunsigned char KeySta[4][4] = { # S- o! R, B; T/ T
{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}
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unsigned char LedBuff[6] = {+ V5 n( R: v# o0 |. M/ K
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF2 [; d |' S3 O( k+ f f, y
};5 b. M1 ~) x3 h9 _4 a+ j& [5 ~, l M% i
unsigned char code KeyCodeMap[4][4] = { //矩阵按键编号到标准键盘键码的映射表' u1 ]: ~" Y. H
{ 0x31, 0x32, 0x33, 0x26 }, //数字键1、数字键2、数字键3、向上键
; k6 [+ P) {. a1 D( [ { 0x34, 0x35, 0x36, 0x25 }, //数字键4、数字键5、数字键6、向左键
$ _( W$ D4 y, g# x3 n" P* ?, } { 0x37, 0x38, 0x39, 0x28 }, //数字键7、数字键8、数字键9、向下键# ?$ Q' A4 A" ^' A8 i. Y4 G
{ 0x30, 0x1B, 0x0D, 0x27 } //数字键0、ESC键、 回车键、 向右键
, x0 k& h9 t; K' z% [" O; Q };
( X$ k8 h! H9 C3 V+ X+ `6 W8 |. tvoid KeyDriver();4 C' b$ h8 b+ f0 o2 t
void main()
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1 Y2 b% J, w4 `: W" R9 k EA = 1; //使能总中断& }* p: b' k5 r1 H. x+ D
ENLED = 0; //选择数码管进行显示# e7 J/ L. I9 C5 a
ADDR3 = 1;
8 I( o% U' O( _3 @2 u- U* } N9 A1 z TMOD = 0x01; //设置T0为模式1
+ y1 M1 {5 N* d7 [* q3 c TH0 = 0xFC; //为T0赋初值0xFC67，定时1ms( i% H8 S% Q8 {: `
TL0 = 0x67;
_ M& E; _; u9 V. o' h3 |6 d ET0 = 1; //使能T0中断
9 H2 `- e# O f& Y1 e( _. b2 _ TR0 = 1; //启动T0- \& V% N) B7 P7 K
LedBuff[0] = LedChar[0]; //上电显示0; z7 m, [' ~- c
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while (1)6 D) W5 |7 k+ p5 p7 L; M8 n. @
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KeyDriver(); //调用按键驱动函数 O" H# r1 h' b @. ~1 y& x/ G
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}
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; M) K- x2 n4 L0 svoid ShowNumber(unsigned long num)( e7 I/ H9 c7 D- l( W7 R6 m
{$ ~. @& n0 ~* t- ~) S
signed char i;
/ L3 E" y, u2 y$ e7 r& W7 L3 V& ~ unsigned char buf[6];
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' C; F% _( c4 H for(i=0; i<6; i++)
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buf = num % 10;, b. }; t7 ~* x6 c0 C% \
num = num / 10;: [$ o5 D/ V0 E$ g; Y# r6 K
}
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for(i=5; i>=1; i--) \\gaoweibuxianshi
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0 C, v) j7 t( }" M- ], _ if(buf == 0)
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6 B0 g% A& V* v" Q m, I LedBuff = 0xFF;4 b/ I* B8 m# b$ _$ U
}
; X! [' a- x5 _ d5 `5 ]% h else
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for(; i>=0; i--) \\1 Z" d9 f6 q E2 a9 O, F8 z
{( I4 w0 D f5 Y* Y, a
LedBuff = LedChar[buf]; % ]. H+ Y2 Y, m
}
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void KeyAction(unsigned char keycode)
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static unsigned long result = 0;7 M: Y8 Z% n* S/ E5 ^4 S
static unsigned long addend = 0;
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if((keycode >= 0x30) &&(keycode <= 0x39))
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addend = (addend *10) + (keycode - 0x30);
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$ ^: i6 D) ~* n% S$ m0 z2 W }
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else if(keycode == 0x26)" X7 e& }# H0 v0 Q; E( P8 ^
{
2 F( Z5 a' ]/ q Q* y: i8 X7 l result += addend;3 b0 y7 [, m! b0 Z
addend = 0;
( f# S1 D0 a$ Y# s: x$ J7 V ShowNumber(result);
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else if(keycode == 0x0D)
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result += addend;2 F- [9 |% C- M) o' I
addend = 0;
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; W8 |- I* k8 I else if(keycode == 0x1B)
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' m% l; e% o& j addend = 0;
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0 Q# P. { W& L ShowNumber(addend); 3 a+ }/ k" d3 a8 r$ r
}
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void KeyDriver()
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unsigned char i, j;* D+ S' l' o6 I! q) E; M2 B
static unsigned char backup [4][4] = {& v) }. g2 V$ r7 Z6 S# p2 K
{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}2 _) j+ Z* i* l, f9 M3 f% Y6 _
};4 M1 o/ d* [+ `3 Z; h& ^ f
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for(i=0; i<4; i++)
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- ?2 i) E) _* P- E" y% L for(j=0; j<4; j++)
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, ?7 {. r; t7 r if(backup[j] != KeySta[j])( [# \- | F$ O! o; N
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if(backup[j] == 0)
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) M: W& z: m4 P* k7 @4 i4 \* Q KeyAction(KeyCodeMap[j]);. v8 N6 b z$ L( v& {; }- I
}
) ]- K9 k9 z( f% Z! s+ R backup[j] = KeySta[j];$ M( U1 \1 F9 d4 V( x' d! X% L
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}
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/* 按键扫描函数，需在定时中断中调用，推荐调用间隔1ms */$ [/ ] N+ d4 `" u; B0 j; t
void KeyScan()
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$ A" h' c- ~* A1 ]+ \ unsigned char i;) o' S3 T* g8 L7 S C' U4 }+ d- r( U- m+ B
static unsigned char keyout = 0; //矩阵按键扫描输出索引/ I: q6 [: o( `3 h
static unsigned char keybuf[4][4] = { //矩阵按键扫描缓冲区4 p7 J5 ~; P$ `2 _
{0xFF, 0xFF, 0xFF, 0xFF}, {0xFF, 0xFF, 0xFF, 0xFF},
* J! v" d; c# A {0xFF, 0xFF, 0xFF, 0xFF}, {0xFF, 0xFF, 0xFF, 0xFF}) h/ M- v5 g6 z. r
};
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//将一行的4个按键值移入缓冲区: ?+ ~3 y8 F- [2 z. E* `; o8 ^* G
keybuf[keyout][0] = (keybuf[keyout][0] << 1) | KEY_IN_1;
- i, \& u9 Q6 O m4 v: O keybuf[keyout][1] = (keybuf[keyout][1] << 1) | KEY_IN_2;, u0 c7 `( U) Y/ K5 o) U
keybuf[keyout][2] = (keybuf[keyout][2] << 1) | KEY_IN_3;
6 Q" i8 B7 c4 p keybuf[keyout][3] = (keybuf[keyout][3] << 1) | KEY_IN_4;$ W6 E5 T c% a9 G7 s% O
//消抖后更新按键状态
- W" t8 O- D a1 s2 r0 y for (i=0; i<4; i++) //每行4个按键，所以循环4次7 H) I1 n+ X& i9 E. \
{
5 e+ O# U" l: A R7 P3 M: |; ] \ if ((keybuf[keyout] & 0x0F) == 0x00)7 D) W7 R {) J4 d
{ //连续4次扫描值为0，即4*4ms内都是按下状态时，可认为按键已稳定的按下/ k8 z. H h5 V& a8 i6 k
KeySta[keyout] = 0;$ Q( U7 u+ `4 T9 g$ j" s3 `
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else if ((keybuf[keyout] & 0x0F) == 0x0F)
; E% K& [+ v9 K2 Z# U8 N0 O6 K/ D { //连续4次扫描值为1，即4*4ms内都是弹起状态时，可认为按键已稳定的弹起/ a4 e% b, \. ?: c
KeySta[keyout] = 1;4 |0 M) I6 P$ c, U
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//执行下一次的扫描输出7 ~/ }, M% y* c3 t: ?) U; N
keyout++; //输出索引递增
- c+ T, E& y% \1 B; M1 \ keyout = keyout & 0x03; //索引值加到4即归零
) F8 G; b2 I8 F& F; E switch (keyout) //根据索引，释放当前输出引脚，拉低下次的输出引脚
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& S7 G$ p, S" y V case 0: KEY_OUT_4 = 1; KEY_OUT_1 = 0; break;* I# @/ ]( r: U( v$ F2 q
case 1: KEY_OUT_1 = 1; KEY_OUT_2 = 0; break;
) h* W& ]' G" ]+ S( s3 H1 u/ o: ] case 2: KEY_OUT_2 = 1; KEY_OUT_3 = 0; break;
8 p; g; Q# d. ?0 [1 i case 3: KEY_OUT_3 = 1; KEY_OUT_4 = 0; break;
$ ]) D* E' Y( H5 Q$ m% x default: break; B9 B, K4 j' `$ j* t# Q; ?
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/* 数码管动态扫描刷新函数，需在定时中断中调用 */% [; @. D* q( U+ q/ Q2 \
void LedScan()
% d, Q/ ] d) D% o" Q{
9 D$ \0 G1 `# _: A( M static unsigned char i = 0; //动态扫描的索引- S* k1 G' u$ A+ f9 I& B% Z
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P0 = 0xFF; //显示消隐
) s3 i: w2 P4 I' p& x1 W5 S3 S7 H4 | switch (i)
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case 0: ADDR2=0; ADDR1=0; ADDR0=0; i++; P0=LedBuff[0]; break;
) O+ F. f8 B' P: R5 E case 1: ADDR2=0; ADDR1=0; ADDR0=1; i++; P0=LedBuff[1]; break;0 s2 A9 c$ {) ~
case 2: ADDR2=0; ADDR1=1; ADDR0=0; i++; P0=LedBuff[2]; break;5 i2 V- U7 S, B3 M) ~
case 3: ADDR2=0; ADDR1=1; ADDR0=1; i++; P0=LedBuff[3]; break;
0 X l4 N7 T6 d) V2 y: k6 {# w. s case 4: ADDR2=1; ADDR1=0; ADDR0=0; i++; P0=LedBuff[4]; break;" A Y' r6 _- E7 b& b6 _* K- M
case 5: ADDR2=1; ADDR1=0; ADDR0=1; i=0; P0=LedBuff[5]; break;
6 n4 K: X$ J$ t* d' ^5 N; c: a default: break;1 I2 J- c0 H& K; e2 J! O
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: A' p" e: r, Q/* T0中断服务函数，用于数码管显示扫描与按键扫描 */6 { p# E! U3 O+ L! h# u
void InterruptTimer0() interrupt 1
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TH0 = 0xFC;
+ j; a# r# U- [( K4 u: ?; k1 J TL0 = 0x67;
) z* c/ J% P9 ?! J, P. N- k LedScan();6 |4 g+ n, n% K
KeyScan(); ]" U$ J9 T' t! X( d3 c
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发表于 2019-1-16 06:30
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