ds1302实时时钟问题请教-非常感谢

我的SOPC 系统中包括CPU核、3个PIO（RTC_DATA双向,RTC_NRST,RTC_SCLK）、jtag uart（为了在控制台上输出数据），sdram。
下面是nios中的程序。" H& o- E: b0 e9 r5 y. i
#include <unistd.h>
#include "../inc/sopc.h"- V) j* |: d. h+ K8 ?5 w
#include "system.h"+ e. ^* `9 _/ [, b0 l
#include <stdio.h>
#include "string.h"
#include "altera_avalon_pio_regs.h"

unsigned char time[7]={0x00,0x16,0x23,0x17,0x03,0x17,0x10};//格式为:　秒　分　时　日　月　星期　年7 C- C) R' W& P+ ]( H. V
static void delay(unsigned int dly);  V! o/ @& ]9 J
static void write_1byte_to_ds1302(unsigned char da);
static unsigned char read_1byte_from_ds1302(void);" q% [2 X/ u" z5 _% i4 E
static void write_data_to_ds1302(unsigned char addr,unsigned char da);5 B" R& p% C" w8 j5 K+ k# I
static unsigned char read_data_from_ds1302(unsigned char addr);
void set_time(unsigned char *ti);
void get_time(char *ti);

void delay(unsigned int dly)
{
for(;dly>0;dly--);$ L! y* e  X" g
}

void write_1byte_to_ds1302(unsigned char da)4 j; e$ ~2 q4 D
{; X% z7 t; m& Z/ A% H  D2 K
unsigned int i;2 l; e0 l' u* v
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);2 m; A, F' ?- j! g" _, C

for(i=8;i>0;i--)
{+ j* m2 ]3 t: @0 b9 ^
      if((da&0x01)!=0)
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,1);6 [$ N: K5 Q* D  R* ]
      else
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,0);
            p( Z4 U7 m: z
            delay(10);
         IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);
      delay(20);
      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
      delay(10);
      da=da>>1;
}7 s; N5 }1 {8 ]
}

unsigned char read_1byte_from_ds1302(void)
{
unsigned char i;
unsigned char da=0,temp;# S9 d8 D( v, k9 N3 ~
1 q; X4 H' c# o8 Z  E
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 0); 3 p! W$ C+ |4 a7 }/ @* r
  + l  \! {+ S0 ]  u1 @4 e; J0 X
for(i=8;i>0;i--)
{
      da=da>>1;0 U$ M6 E' e5 }0 F6 d0 E) N

      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
      delay(20);" ^$ c7 E: Y; B0 g  ?7 ]
   IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);

      temp=IORD_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE);
      if(temp!=0)
            da+=0x80;9 A' B) j8 u9 w- `; U  p
            delay(10);
}5 d$ p2 \! B( ]
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);
return(da);: C5 [$ P+ [0 p) n1 _$ C( s
}+ m0 l3 ^7 w+ Z! b

void write_data_to_ds1302(unsigned char addr,unsigned char da)2 I8 X3 O) ]1 z5 A% q; G. V
{
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);
delay(40);3 n! O. O% f- E& H' B, k3 X
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);( W9 c/ \2 X& Z
/ p) N! U$ a0 A# _% t/ y# ~
write_1byte_to_ds1302(addr);/ B' S5 t! v% q
write_1byte_to_ds1302(da);0 U. f- `+ P' m2 i
. \2 _; Q- \6 r$ P
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);
delay(40);5 ]5 z- t5 n" o# U
}
( K4 e! O; \9 m9 Z5 \# |
unsigned char read_data_from_ds1302(unsigned char addr). Y0 ]. P- n! r
{
unsigned char da;3 d9 l& v9 }% s1 l% H  w

IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);* d0 |0 D4 `5 K% \; y
delay(40);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);

write_1byte_to_ds1302(addr);
da=read_1byte_from_ds1302();- s/ p" Z" n5 O4 {' c
+ |' a( `$ j6 B% `6 v4 d8 j
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);# Z3 m6 \8 [; `% @
delay(40);
return(da);
}
- H/ n3 y9 A! V9 L" p  L* p
void set_time(unsigned char *ti)6 W7 r7 s  P) M, y+ q$ p
{
unsigned char i;$ y6 ~2 T8 a+ _( h
unsigned char addr=0x80;! w9 g: S5 }- t; N4 ~' J2 I  T

write_data_to_ds1302(0x8e,0x00);+ E' F# V* F$ K7 N+ d
4 a% y2 ?' F' Y3 O  @% X
for(i=7;i>0;i--);5 J/ J* `9 q: O2 |6 A! S
{0 p( q; ?1 V( q, ~4 }" v
      write_data_to_ds1302(addr,*ti);: \% o+ H( b7 ?7 X) V: z- B8 B
      ti++;
      addr+=2;2 }: x+ r9 M# C! ?
}& G$ w+ {4 J- ^  S) b  G2 i' V: c. ~* e
write_data_to_ds1302(0x8e,0x80);3 C! s- d% ?! P
}! ]7 Z& l' t& @9 e4 |
5 u# n: _) Q+ e
void get_time(char *ti)
{3 Z+ F3 Z4 @7 |: Q/ X3 l# e
unsigned char i;
unsigned char addr=0x81;
char time;, E! o" m: D2 ?
3 d1 V8 |: D, E; l( I- O
for(i=0;i<7;i++)
{  M6 z5 U! ^: P. ?3 \5 ?
      time=read_data_from_ds1302(addr);( a2 y0 `1 O- Z" P% O
   ti=time/16*10+time%16;1 [9 s+ j1 N8 [) ?% g% b- _
      0 {4 F: M: E' n7 A
      addr+=2;7 ~. A' g7 P/ J, C
}6 C# H( i' r% h$ ?- r' x
}

int main()
{# p* Y1 @1 P/ H3 s6 i) \7 I
      # ?; v- O/ v* L* O
unsigned char buffer[50]="\0";' t  w) B, n. t3 D+ K( C; F
unsigned char second[4];- j, ]4 b1 j& R7 {3 A- ?
: J. S# h' x, D; Y
sprintf(buffer,"20%d-%d-%d　%d:%d:%d\n",time[6],time[4],time[3],time[2],time[1],time[0]);
printf("time=%s\n",buffer);
* ]8 u1 l7 u2 f% ^/ d  r$ E
  write_data_to_ds1302(0x8e,0x00);       ( R. f. u3 s' g2 j
+ E! m5 [8 Q* P% Z6 T$ [
write_data_to_ds1302(0x80,0x00);       //0x00,0x33,0x23,0x17,0x03,0x04,0x10,秒，分，时，日，月，星期几，年# B4 G8 @# ^1 H2 C# [
write_data_to_ds1302(0x82,0x33);+ f% `/ q  {" ?# l: y
write_data_to_ds1302(0x84,0x23);
write_data_to_ds1302(0x86,0x17);
write_data_to_ds1302(0x88,0x03);$ o+ R- ]: C0 Z: o
write_data_to_ds1302(0x8A,0x04);
write_data_to_ds1302(0x8c,0x10);4 K. ^4 O' G  @. A' k* S4 Y

write_data_to_ds1302(0x8e,0x80);, V: N& M* \, q5 O' s' p' C. \/ t
8 r2 E. ~& ]0 A/ f: A
while(1){
get_time(time);
( y/ w$ h! O6 `5 I/ L
sprintf(buffer,"20%d-%d-%d　%d:%d:%d\n",time[6],time[4],time[3],time[2],time[1],time[0]);  E6 T4 h2 Z" i
printf("time=%s\n",buffer);

second[0]=read_data_from_ds1302(0x81);, B; ~6 O, _4 ~) h* J+ I
      second[1]=read_data_from_ds1302(0x83);

      second[2]=second[0]/16*10+second[0]%16;; ^3 n9 q$ @! I3 J% @, ~& {
      second[3]=second[1]/16*10+second[1]%16;/ G2 p9 D% \" s
      ; Y( P" U0 Y  `& A- F, d4 Z
      printf("second=%d,%d,%d,%d\n",second[0],second[1],second[2],second[3]);; F1 s6 ]3 I# ]$ j% @& h4 m
usleep(1000000);
}4 n! s9 e5 t0 e2 Y6 ?

return 0;
}' R. q0 ]( C: K) t8 l7 g6 ~! E
4 G& _5 F8 m4 |# O
console控制台出现的结果是' C5 I+ U& Z+ e, V

nios2-terminal: Warning: The JTAG cable you are using is not supported for Nios
nios2-terminal: II systems.  You may experience intermittent JTAG communication
nios2-terminal: failures with this cable.  Please use a USB Blaster revision B# [/ r% W( u  u  m8 j% S4 \
nios2-terminal: cable or another supported cable.  Please refer to the file
nios2-terminal: errata.txt included in the Nios II development kit documents% n- p" [1 u* R1 _2 `% v5 c/ c
nios2-terminal: directory for more information.8 _/ K( X9 l3 a  V+ a" u/ Z' Y% h) G
( {) h, O  x5 H% {% ?: B
nios2-terminal: connected to hardware target using JTAG UART on cable. R& _/ O3 P7 I
nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0! D$ q: a5 I2 `5 ^8 H, u
nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)% E/ Y8 z8 @& ?, \8 L+ N

time=2016-3-23　35:22:0
" n" F0 h* h( o$ c# L, b
time=2010-3-17　23:33:0
: v" o/ j% G# C4 A: R) Q% F
second=0,51,0,33
time=2010-3-17　23:33:0

second=0,51,0,33
time=2010-3-17　23:33:0
9 S  L7 x( {# o' b6 }" g. k
second=0,51,0,33
time=2010-3-17　23:33:08 {& R( F. I* {2 T7 Z
秒数不会自动增加。往ds1302内部寄存器写什么数，就输出什么数。6 i' y0 h( }! q4 O" a2 b* I+ D
+ Q7 i( p$ s9 ]  F

看结果，好像是写进去了，又能读出来了，但是时间不会自动更新。
晶振用示波器测了，有电压，应该没坏吧。时钟芯片，今天也换了片，也没问题。- V* a9 k% y- P! W9 G% y
想起什么问题再添加吧。; o" R8 M  ?+ b4 J, W9 o. ^
  u  F9 k/ E# B2 g; K
希望高手能给解决啊，这程序都弄几天了，非常感谢！还有，从论坛上学了很多东西，谢谢版主啊，辛苦。

另帮忙解释下ds1302时序图？怕理解错了，那些延时很重要吗？

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2楼

flying发表于 2010-7-27 08:58 | 只看该作者

有没有高手指点一下啊，呜。。。

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ds1302实时时钟问题请教-非常感谢

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ds1302实时时钟问题请教-非常感 谢

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ds1302实时时钟问题请教-非常感谢