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。: K9 h7 c$ o0 P
下面是nios中的程序。# e- A+ V1 ~4 @5 _* z
#include <unistd.h>% W( p0 ~* C5 L7 P# Z( e) [( X
#include "../inc/sopc.h"+ I0 a0 e0 x# Y! H' R
#include "system.h"
#include <stdio.h>
#include "string.h"2 W4 N. G4 n! o; n
#include "altera_avalon_pio_regs.h"2 v4 F- c( ^# l6 y( y% S* \% ?

unsigned char time[7]={0x00,0x16,0x23,0x17,0x03,0x17,0x10};//格式为:　秒　分　时　日　月　星期　年8 p+ K! f* O% X- Q5 U0 a
static void delay(unsigned int dly);
static void write_1byte_to_ds1302(unsigned char da);: F  L7 c5 e1 X; f0 z4 a) ]
static unsigned char read_1byte_from_ds1302(void);
static void write_data_to_ds1302(unsigned char addr,unsigned char da);! q0 k2 j" e$ |# _2 h2 S6 V
static unsigned char read_data_from_ds1302(unsigned char addr);
void set_time(unsigned char *ti);! l  c: E7 ^5 |/ D5 e( z8 x+ \0 i
void get_time(char *ti);3 D/ v6 X" j' j2 `. b5 `3 B6 D+ @
3 V1 Q& P' l) }0 {9 ?
void delay(unsigned int dly)
{# `$ s. _% _# X0 h: M0 U
for(;dly>0;dly--);" c! j9 m( p" [8 O& D
}

void write_1byte_to_ds1302(unsigned char da)- n5 {9 ]! G  v* j, Y% m# `' s1 @
{( |: S! o$ w9 D/ C! f5 F, D
unsigned int i;
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);* [  ~& D6 Q: S/ n% Q- h; G) P
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for(i=8;i>0;i--)8 \/ [! D( U4 U) Q
{/ R. o) k+ g- b* O  o
      if((da&0x01)!=0)
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,1);8 [% j- ^& r& X; O. @+ e( s
      else
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,0);6 [) g+ w2 W% U
         2 n  t! E, h: ~6 @
            delay(10);
         IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0); 4 x2 O7 X' @  z' C  x: b  a5 y
      delay(20);; J1 ^$ M  k5 M, {
      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);3 Y9 I. e9 H; |/ y
      delay(10);
      da=da>>1;
}
}* ^3 P, B  b( J. O
& `9 I7 V# h& D0 r) E8 k
unsigned char read_1byte_from_ds1302(void)  L/ T& C. e, ?  A5 s5 s0 Y
{9 l( O3 I, B% G0 O& M+ {; a6 S; j& S
unsigned char i;; b* h, J. C9 q; H5 ?3 i
unsigned char da=0,temp;1 b) W0 a1 Y0 B( B$ Y
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IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 0);

for(i=8;i>0;i--)) \9 b* U+ k+ q( }
{9 `% w9 l. i- m+ _  G& M% }- M2 \
      da=da>>1;; M" {* ?9 }% |5 B, k/ p# z( o
   - V6 i, n, a, n  ]
      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
      delay(20);2 S* b0 i5 U  `$ H
   IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);# v2 ?% T4 c" H( Z) J+ x

      temp=IORD_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE);! A$ r; F) U! O7 M$ f7 m, r
      if(temp!=0): g- v7 p0 h. D+ r, R
            da+=0x80;) m% e9 X5 D$ ^! x( b) y6 o! E/ v
            delay(10);
}: c6 a, H9 }& Z5 y4 n( m" q, D/ E
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);
return(da);
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void write_data_to_ds1302(unsigned char addr,unsigned char da)  ^3 ^2 A2 e; g; R. a
{8 O+ L' N0 f* y1 p7 J
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);- u3 j6 n1 J* [7 S& `) R
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);, U. p  n$ m. f3 o* H7 h  M
delay(40);/ M" K: `% [7 C8 B
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);

write_1byte_to_ds1302(addr);
write_1byte_to_ds1302(da);
! j; a& W7 n2 J2 ], J& }
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);! s% B$ Q9 r& ^, H/ f6 J
delay(40);- F3 D  {% @# V9 P( D/ r( ^
}
; r  G3 a1 t& H! Q
unsigned char read_data_from_ds1302(unsigned char addr). K1 |7 \: P2 P
{
unsigned char da;
* c2 Y% w5 V. T5 @4 q6 C4 n
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);
delay(40);& C. i& @9 q' X* \; _- O
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);
+ g2 F5 I' l* {7 \
write_1byte_to_ds1302(addr);
da=read_1byte_from_ds1302();

IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);6 a0 F( B( ?1 Y! c; ?
delay(40);% b% h. w7 U% A: [7 x! ~
return(da);( i8 G; t* f0 j" |6 N% O6 b
}9 D" _6 v. c' q
) ^, k& S" w* i1 _0 {
void set_time(unsigned char *ti)6 [1 z9 Y# j& J3 s' Y4 O5 e+ M, }
{1 L- _, f7 h( ~# i% F; Z% t
unsigned char i;6 J( D) B8 ]7 I; b* o/ n/ a
unsigned char addr=0x80;

write_data_to_ds1302(0x8e,0x00);6 P) ~3 T; q/ d1 R. s- @
* L- M" S2 S7 h3 f, s
for(i=7;i>0;i--);6 g! g5 Z, C" ]. f6 w/ e
{% S4 r! Q  d/ {
      write_data_to_ds1302(addr,*ti);( y4 ?) h( @5 p! B6 D6 g. W
      ti++;
      addr+=2;
}
write_data_to_ds1302(0x8e,0x80);/ }: _! d  M* @7 Q
}

void get_time(char *ti)
{
unsigned char i;
unsigned char addr=0x81;  h" u" i6 T/ m" w4 |: {
char time;

for(i=0;i<7;i++)5 c& L$ @- ~9 P; U( I# ~% y$ n
{2 [+ f: {/ k, Z; v/ ?# b" j9 G0 I3 ^
      time=read_data_from_ds1302(addr);
   ti=time/16*10+time%16;, ^1 N! X, a; x

      addr+=2;
}. s: _* N" H% a( D
}" Z' p' I3 ]0 p
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int main()
{
      6 N2 o& `6 X( t$ Q: w! I" w
unsigned char buffer[50]="\0";4 g- g  ]+ ?0 p3 H( x
unsigned char second[4];
* V  N1 h; v# Q8 s
sprintf(buffer,"20%d-%d-%d　%d:%d:%d\n",time[6],time[4],time[3],time[2],time[1],time[0]);0 @$ E4 u, @1 |
printf("time=%s\n",buffer);
; O/ L" m& E& X$ ], g7 ^
  write_data_to_ds1302(0x8e,0x00);
& }% e, O4 C5 O: l3 f4 t
write_data_to_ds1302(0x80,0x00);       //0x00,0x33,0x23,0x17,0x03,0x04,0x10,秒，分，时，日，月，星期几，年
write_data_to_ds1302(0x82,0x33);
write_data_to_ds1302(0x84,0x23);
write_data_to_ds1302(0x86,0x17);7 I1 p2 r  f# h
write_data_to_ds1302(0x88,0x03);. n8 E. s0 d/ g8 P: G; J* A9 t! |
write_data_to_ds1302(0x8A,0x04);5 }+ _' \& f3 h/ k
write_data_to_ds1302(0x8c,0x10);

write_data_to_ds1302(0x8e,0x80);

while(1){
get_time(time);

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);
4 K8 ?4 X( p) g( c- L
second[0]=read_data_from_ds1302(0x81);) e3 y5 N4 d2 L) S: p) A
      second[1]=read_data_from_ds1302(0x83);7 }  z. W5 D" F$ n9 ?/ {

      second[2]=second[0]/16*10+second[0]%16;
      second[3]=second[1]/16*10+second[1]%16;/ d1 Y$ H2 @! o5 n9 K3 A1 ?# D
      + G# J. x' C& {) a# H4 P( A
      printf("second=%d,%d,%d,%d\n",second[0],second[1],second[2],second[3]);9 i' l+ q& {) w0 D( i
usleep(1000000);
}
9 `8 w5 D) o5 Z
return 0;. a* l' o# E+ Q
}

console控制台出现的结果是' [; A" j1 d' c- t/ R; v, n/ q* K

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  z$ u/ A" u: I7 F! H
nios2-terminal: cable or another supported cable.  Please refer to the file
nios2-terminal: errata.txt included in the Nios II development kit documents: t- y  L: l1 k- `- D2 O
nios2-terminal: directory for more information.' t1 \: U% [' q, S! B8 e

nios2-terminal: connected to hardware target using JTAG UART on cable5 R* D- Q- [; U% o2 B) Y1 K, |" x
nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0
nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)
) W: c7 H) K" }7 r+ {( e
time=2016-3-23　35:22:0

time=2010-3-17　23:33:08 T6 i: h3 \+ Z3 E" v9 `
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second=0,51,0,33% K5 S% j' w4 I
time=2010-3-17　23:33:02 \- }- G) N* w0 @/ ?% r
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second=0,51,0,33
time=2010-3-17　23:33:0
/ [7 [+ D6 h6 W2 @0 b
second=0,51,0,33( U8 t4 G0 q; `  G( D! U
time=2010-3-17　23:33:0
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。
2 i" t* Q2 k1 v8 @

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。' S; [# F5 z4 X4 o+ O* y* k+ A
想起什么问题再添加吧。4 E: y$ q$ n* ?& v* [
# L0 y5 @! Z' q. f/ O! n: q. W- P. z
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？1 w; ~8 _, \, e1 ?

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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