利用74HC595显示多个数码管

wu68aq · 发表于 2018-11-30 09:22

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利用74HC595显示多个数码管

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#include <reg52.h>
' B. {* I3 }2 B6 O% P6 m9 X, @& i& d#include <intrins.h>4 i& S! U  X. `" J" ~# X" p: e) s- a
#define uint unsigned int' g! l8 F! G0 I" T4 r
#define uchar unsigned char
: T/ I5 B3 Q" d$ Ssbit ClOCK = P2^0;       //HC595第11脚,串行时钟输入端
# @  t( ~2 L: d3 gsbit DATA  = P2^1;       //HC595第14脚,串行数据输入端
/ o: ?" Y3 \8 v3 K- ^/ ^# }: Msbit LATCH = P2^2;       //HC595第12脚,输出锁存脉冲输入端' z* |  q: T, X! a  }. Q% l! t) {

0 |; x# ?, W+ ]; R6 W8 N  ?/ T- B//定义共阴数码管段码0-9
- p% J3 V6 d! [; L' Ouchar code segment[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x27,0x7F,0x6F};
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7 ], A9 o) z! h//串行输出一个字节
* _/ d3 H9 m& F" W5 lvoid HC595(uchar word)- D* X% z4 F9 A3 `
{
& i# \, k0 a/ ?7 l( W uchar i;4 x. D, e) t$ ?# v3 [0 G; u% z- O5 p
for (i=8;i>0;i--)
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6 Y* @, w! V, b; M& w$ `, e3 ]       ClOCK=0;# d2 @  M5 Y' \  I1 G! `/ G9 k% D
      DATA=0x80&word;
7 ?2 a% X! Q7 v8 Z       word=_crol_(word,1);" W2 [. }7 [7 X
      ClOCK=1;
/ T' Q; X' z. K       _nop_();; r2 c9 s: o. ^; P) q) s+ V* C
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}
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void display(uchar S1, uchar S2, uchar S3, uchar S4, uchar S5, uchar S6): K. b# B9 m; X2 h
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      HC595(segment[S6]);
* Z' y' J* D1 v# m* b       HC595(segment[S5]);
. a( M3 U1 `: b( j0 D# c3 @       HC595(segment[S4]);9 I% n. X" S/ a  B
      HC595(segment[S3]);& Y$ _( {6 M/ V; n; _: h
      HC595(segment[S2]);2 R. h# g" N5 q; b4 V2 n
      HC595(segment[S1]);
. `! U8 B3 u, q4 E  I/ z3 \3 [. [       LATCH=1;
4 E0 B. z- e' u# j$ r5 P. \  l; \, [ _nop_();# M0 `. |6 J2 u" S+ A5 e
      LATCH=0;
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' ~+ O' i4 n# K/ fvoid main(). w- l1 d! v3 u" {# M, H
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LATCH = 0;7 o$ L' w0 x0 P4 ?2 Z$ \
      while(1)
# T* F7 J$ K$ B  D1 E  |2 O             display(2, 0, 1, 3, 1, 4);
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