II2C总线芯片 24c0x读写程序

Demyar · 发表于 2019-1-4 09:40

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II2C总线芯片 24c0x读写程序

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#include<reg51.h>
#include"intrins.h" //  _nop_();: d% i' [" n0 `: r# c
#define uint unsigned int
+ E' c" @/ k) ]# s8 c6 z#define uchar unsigned char! v( d  h3 n! }
sbit scl=P2^1;
% T0 m* O3 K, \0 ysbit sda=P2^0;7 T+ A2 c5 X5 V2 K
bit write=0;& L* m1 v3 j$ ]. h: _/ j5 `6 M6 D
uint num,num1;
5 C) u$ \' s, buchar ge,shi;
9 X" y0 v$ j9 v( x' Duchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,, [$ S" @6 Y- c6 u' Q
0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};, V! _) P& `+ q6 s3 U, N
void delay_ms(uint Z)
1 q" [' Y; J. Q( v4 P8 ~1 e{; p9 Z) i, Z. e
      uint x,y;! _# b# F5 x7 C1 i9 x, w
      for(x=Z;x>0;x--)                      ) b! b$ c8 h1 Z, w' C8 ~
      for(y=110;y>0;y--);7 D! W* B, T# o9 U/ ?. \2 A+ T
}. T- s: A' N0 W3 w" a& @. v
/*****ÅäÖÃIICD¾Æ¬**********/
+ ]7 ?6 f: f* Z. z9 Cvoid delay()# y8 @9 x7 M; G3 t8 N. R$ I9 B
{# U# \, B0 p, [) F* N" t
      _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();0 b" k- ?% U* P: F
}
4 e5 T. F$ n: T% ~1 |& w3 ?+ [void start()//¿aê¼$ V- ?% \1 ]3 k& D
{
+ V2 h' h: B/ M* e/ I       sda=1;
* a. a$ o! H; z# Z, x       delay();
6 T* D) e. _  L& U& `       scl=1;  w5 T  @1 F3 M2 |# d
      delay();+ Y1 N# f, ^2 n4 V
      sda=0;( q1 S! X% T2 S% {4 R
      delay();6 m7 ~4 a4 c; f8 U( U/ h* g
}$ S6 [0 s: A: G, D/ F
void stop()7 h4 ^7 O8 T/ T0 X& R: W% a% }
{
. E( @) `) M* Q9 z2 H. U, q       sda=0;/ V9 Z9 I( S: H) x* p4 d
      delay();- [7 l8 F! p7 \" t, p
      scl=1;
1 H) R" k+ K" d8 G+ F       delay();
% t5 ]' s+ I5 Z4 |3 z       sda=1;
; Q8 L* n" V5 B) ~       delay();( m& @" w' l# }) E/ `) D
}" b9 R- u5 E& e/ I
void respons()0 y; S4 P4 o" l* u9 M
{
' T! V7 j3 f1 M* ~  v       uchar i;; c! ?8 b! t1 e( U
      scl=1;5 v  B# i% k( _5 B
      delay();' u  q; e  m6 z- ]
      while((sda==1)&&(i<250))0 S+ k" _5 K$ w. Y+ X+ V+ a
            i++;
8 _( s5 d" r. ?* @       scl=0;3 d( Z$ o5 \- P$ ?( x) s# p, ^' j
      delay();: g6 C, [3 C& C- a1 V- O
}& m1 `" ?1 V/ T; x. Y! W) n) e
void init()
8 \. ?  E5 u) s+ C! R9 y4 [& k{4 ?2 M3 S/ b/ `1 |, Z
      sda=1;7 t# \# Z& |/ ]9 Y7 q7 z
      delay();
6 Q! D+ O! a9 S- S1 C6 Q       scl=1;
2 o: [$ E% [# M0 n( X7 U' I       delay();
2 J$ Q. J8 G- }# J4 j$ j}2 {# w8 ]4 M, W2 c
void write_byte(uchar date)
{
0 T# @1 B9 f  ~. l6 r7 D/ X+ c. l       uchar i,temp;! h% R+ O* [9 }0 f" o! p( P7 i
      temp=date;
7 J; v, ~8 @! ~# E0 Q       for(i=0;i<8;i++)
& o$ X; ]" \; \2 D       {
& O9 N6 v& {8 Z" }             temp=temp<<1;5 t6 f, {6 R% }) l' z. n- A
            scl=0;
7 w4 k! m5 _* O; ?- Q# m             delay();7 Z2 i& s. A$ `2 B7 u
            sda=CY;) Y- J4 A! b7 t* u  D. t! L
            delay();* @' [) i7 s( q
            scl=1;( Y" I  N, ^* n$ g! Z5 s
            delay();
0 n2 P* M; `: `6 e5 V) ?; G8 b* F       }4 G3 X& a7 W( R' E  h1 w# L
      scl=0;" R2 Y3 J% i; }2 ?/ s
      delay();
8 i8 k/ f: P  O7 a7 ]: f       sda=1;
, I' K$ Y" \8 ~' _& }       delay();       : G5 M6 ^" x, o* _( X6 t# i
}- w- U/ d$ h9 z
uchar read_byte()
4 z+ q2 {, b' f. o{
5 v; u" V0 y5 `# n( a$ H. p" `$ e       uchar i,k;, u  y8 E6 `) K1 }/ J! R
      scl=0;
- L' n- G" d; b& R5 `0 f       delay();7 k# P' o  F( C4 p5 n
      sda=1;5 ^8 {/ i/ P! J6 x" q3 S  n! |
      delay();8 G. k  a9 |+ w1 ]  _/ [" h' {( h  R
      for(i=0;i<8;i++)& v: Q" G) D5 D9 ^' }3 G
      {, `5 D( r) `1 I2 T
            scl=1;3 q4 v" D8 g$ V) Z/ {: @* D
            delay();; o$ \$ Q7 h" i4 V; ~' p
      k=(k<<1)|sda;///////- `" Y& g* ^4 v2 O8 W( g
            scl=0;
9 \1 g* d- I) T) B9 N' W             delay();6 q: T0 {+ [3 x# u/ Z! w: L
      }$ D+ Z6 m+ ]1 W
      return k;, e: u3 d' f4 o- T( P9 u
}9 P% A9 y. g" r0 o( z( r

) e2 N# u. P. H. W$ i* k, r/ P, mvoid write_add(uchar address,uchar date)
3 F+ B# ^  Q  l! F{
1 _7 D% S7 ]# K% c       start();1 e4 U" y5 {* W1 F
      write_byte(0xa0);; u: d) Y* `/ L" a! j9 Z
      respons();
9 @* f: W# W7 b5 T& O4 K  e       write_byte(address);$ X) L8 O) d& R% ?" u0 j
      respons();' @5 @5 N6 m9 x% |
      write_byte(date);
) @# S. h6 p3 N$ O- M       respons();% C1 v; o/ ~; n' |! L% w
      stop();+ j* ~6 l$ ]. S* _& p; B
}" }1 o$ J9 o* \  R) M8 f7 P% H
uchar read_add(uchar address)
8 q! `, y0 q" p1 \8 @{
0 T5 ?! }4 M6 L       uchar date;
3 Y) u( o! x3 g0 C       start();) _3 g  B) k" X" a' K  d
      write_byte(0xa0);
0 C/ l6 R- m6 ]1 c. h9 S/ F       respons();
& A, j( J$ w% I8 U3 s; l2 u  z       write_byte(address);4 r; K/ x, u0 B0 O" a, W& x* y
      respons();; H. R# ^' S& `( O9 K
      start();
& I, g" T' ]( r; y, u       write_byte(0xa1);: u( C: o% v* k8 k0 s
      respons();3 S$ V- F( k4 e7 P
      date=read_byte();
' V6 \( {4 u4 `       stop();
      return date;
* i) R; B+ r: y0 d* }0 h}
& O3 R! a9 p7 r0 T/************êyÂë1üÏÔê¾oˉêy*********************/0 K9 Z% ]2 _; r, z2 g
void display(uchar shi,uchar ge)$ x6 g. _/ M/ g: _0 |1 K
{
* ~( P$ _5 P8 \& i( ~& S' ^       P1=0xdf;- `  P' Y1 a+ n. y: p! g- B! p
      P0=table[shi];
" B$ r/ a/ m, `, y       delay_ms(5);: h+ d) R8 ^4 c0 M& `) o
      . n. x& P: U, k7 H3 E5 U' q
      P1=0xef;
( E) ~+ q" S" a: Y) Z       P0=table[ge];' o' o  q. j( k* v5 a
      delay_ms(5);' @# `+ C8 k) y8 i; ~- `2 E4 n

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5 J" \; |* ?- Z& k# Q. G}
7 J8 P# U0 W; a* H: c/*********Ö÷oˉêy************************/2 k, Z8 B( i& y7 x8 z# |
void main()2 k5 h$ D$ x0 B4 D) c& f
{
$ m% X% Y. n/ c) E' r2 G" y       init();+ w: j! j  ~( h. A1 \
      num1=read_add(2);) i5 O% ~3 b' Q- v& L+ e4 l7 c
      if(num1>100)8 D6 x& K+ I) H1 T
            num1=0;
      TMOD=0x01;/ M/ V6 P4 y9 K- K. D) j
      TH0=(65536-50000)/256;
" b) i3 S; v9 {       TL0=(65536-50000)%256;+ }, a- M) s9 S
      ET0=1;
. ^. l  O$ O$ |" q* ^% q* E4 [       EA=1;
$ \4 A6 @, a+ n: Y) ?/ v" m( o% L       TR0=1;0 [4 L" v6 u$ {9 N
      while(1)
& u8 |: R% w& v9 L4 N  c       {
3 ^/ p8 b% p8 Z" Y+ l- H             display(num1/10,num1%10);
3 C3 b$ S2 U; T& R" [             if(write==1)# n; m* M/ p" y8 N0 g  ~
            {) @3 C' w2 n. \, F
                     write=0;
* K. Z3 g0 @# S1 Z! M                      write_add(2,num1);" `# V$ J1 n- s" ?# \
            }
7 e$ A; g$ [& g       }; r. X( ?; u% ^7 s' i( Q; Z
}3 k$ {$ c# c8 t: ?9 S8 V* P/ o5 b
/*******ÖD¶Ïoˉêy*****************************/( e7 e8 y8 x$ Q2 S
void time0() interrupt 1
% n- ~% N) [8 h7 C; y{
( @; x* h! ^* X1 Y1 \       TH0=(65536-50000)/256;* b$ G8 ]( g# |5 Q9 d; V
      TL0=(65536-50000)%256;
& D' j/ C; L4 i7 B/ X. j; N3 y       num++;
* j+ d' D0 [( P1 ?/ l       if(num==20)( |$ R9 Q0 q. x
      {
6 z" Z7 M* ^$ `- ^# {. E             num=0;( U8 R% |2 M0 Y4 S/ U6 `
            num1++;# E8 g0 t# L" i- v; _* I
            write=1;
3 m! J) `! X  Q& J/ u0 Y             if(num1==100)1 W  L. }- I0 u+ q: d0 k
                     num1=0;4 }2 A2 b* @/ X( ^4 X& c
      }
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Mhza · 发表于 2019-1-4 18:11

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II2C总线芯片 24c0x读写程序

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