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。" z: @. o$ d" T/ {  {8 K
下面是nios中的程序。4 S; B1 k3 z- H  Y* ]
#include <unistd.h>% P/ k' r: |) r/ T: }! C
#include "../inc/sopc.h"
#include "system.h"  a! j' }5 m6 J1 z/ S
#include <stdio.h>" F: X. \. I* B8 r  l- I
#include "string.h"
#include "altera_avalon_pio_regs.h"/ R, V3 X0 F- g$ A2 S7 L1 A1 ?. V

unsigned char time[7]={0x00,0x16,0x23,0x17,0x03,0x17,0x10};//格式为:　秒　分　时　日　月　星期　年
static void delay(unsigned int dly);3 i8 J) T- n: O# {& V
static void write_1byte_to_ds1302(unsigned char da);& U3 _+ L/ T( W/ k# p
static unsigned char read_1byte_from_ds1302(void);# a! d: K+ ^7 e9 F2 Z
static void write_data_to_ds1302(unsigned char addr,unsigned char da);, r) u, v6 |2 s6 @% a0 R+ o$ U
static unsigned char read_data_from_ds1302(unsigned char addr);
void set_time(unsigned char *ti);
void get_time(char *ti);( O5 K' j/ F5 T& d& C0 S

void delay(unsigned int dly)
{! X' d/ z' |, H  e6 q# e
for(;dly>0;dly--);, b1 {, F- K. q8 I$ d
}
; q* [& b! O6 u; M$ S7 L9 K( }0 t
void write_1byte_to_ds1302(unsigned char da)
{
unsigned int i;
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);

for(i=8;i>0;i--)% I/ G0 f( P. Q
{1 n- N0 C: ?) I- u3 C$ R8 Q
      if((da&0x01)!=0)' C$ h7 Y3 s3 n* C5 C
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,1);5 y# a; N0 a% P5 K4 ~
      else  w' }  Q. B7 ~9 F- Z" u
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,0);. p+ ^' f1 V- I3 i9 M) F! [" O

            delay(10);
         IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0); ' [) s8 B) J! _# |
      delay(20);
      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);3 h) {; {' H: c
      delay(10);
      da=da>>1;
}* ]- k5 |  g; `* Y' u2 K& o
}* D" b$ u" P7 Z+ A) R* ~

unsigned char read_1byte_from_ds1302(void)6 a8 B; h3 s+ `' [3 K' x
{' R$ r9 A' d; R/ ?  [5 O2 A
unsigned char i;
unsigned char da=0,temp;

IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 0);
  7 [7 T0 ~0 B5 u& E8 x# D6 h
for(i=8;i>0;i--)
{
      da=da>>1;

      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
      delay(20);0 N' L1 f$ b8 `* ~7 u
   IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);

      temp=IORD_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE);: c5 a  A8 U- W0 G! s7 y4 R
      if(temp!=0)2 A8 c3 V4 {9 C) h. D( c6 W
            da+=0x80;
            delay(10);, D8 s+ x1 P! i
}
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);
return(da);
}

void write_data_to_ds1302(unsigned char addr,unsigned char da)
{
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);; g8 @3 ^, E5 e  f2 h/ `
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);" K1 P) a$ X0 u6 w, q/ f
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);5 }9 C* m& s2 C  n$ ]+ g3 L. |
delay(40);* I! |( e) ~- [: p) d
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);' {+ s8 {. ~0 A( K/ d

write_1byte_to_ds1302(addr);
write_1byte_to_ds1302(da);- q- U% y3 \9 d4 {' w

IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);. Z. g" ^/ O8 n& ]
delay(40);9 J8 P5 a( z2 f. W( \
}* ?  }( k4 _1 G& a. L4 J9 R' t/ \% a

unsigned char read_data_from_ds1302(unsigned char addr)# m% S1 H: s0 m, \1 y& w. k
{& l* j; x6 ^! A* N! I0 D
unsigned char da;
. b+ r! L  C* q% R3 F: ?2 j
IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0); 7 X! R% |& H9 ~6 N1 v  ?. u
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);
delay(40);% o1 v) f$ ^/ }6 P" y
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);" \- n' U4 {$ v* g
$ l9 G1 p/ X3 J+ k: r( h
write_1byte_to_ds1302(addr);
da=read_1byte_from_ds1302();9 I' K" P" H' d# u  T& C+ R/ Y

IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);7 S9 t4 U: z0 y# S$ k/ f2 q$ t8 ?
delay(40);* H; H# }5 l4 n! v6 s
return(da);
}

void set_time(unsigned char *ti)
{
unsigned char i;# ^, I# g4 g( C$ q6 d0 G0 g; U+ l
unsigned char addr=0x80;- ~# j( p% n! I0 M
3 W5 t" O1 q# r8 B$ R
write_data_to_ds1302(0x8e,0x00);

for(i=7;i>0;i--);1 O& b8 K6 U! |8 z' E0 o
{3 ?; ?0 g1 H( T/ @8 p( b' d) u) G
      write_data_to_ds1302(addr,*ti);7 E3 ^( ^9 T5 ]
      ti++;
      addr+=2;: i/ {) n1 ]: {
}
write_data_to_ds1302(0x8e,0x80);
}

void get_time(char *ti), E- X( p/ m2 ^
{" ~; d" D; [2 A. N7 z4 P: O1 A$ ]
unsigned char i;3 j/ f* |4 N& p  T
unsigned char addr=0x81;
char time;0 l, r% e6 `2 `7 X

for(i=0;i<7;i++)/ U3 S1 a9 v0 m+ m
{" t" u% V" i+ z8 L' H3 u
      time=read_data_from_ds1302(addr);5 V5 Q2 A9 I. ~* ]8 H
   ti=time/16*10+time%16;7 L1 H0 P, F0 w4 j% k/ o" T

      addr+=2;& B& ?; K+ ?' m
}
}

int main()
{' D+ G. a3 L: z, b& z* I# X

unsigned char buffer[50]="\0";
unsigned char second[4];

sprintf(buffer,"20%d-%d-%d　%d:%d:%d\n",time[6],time[4],time[3],time[2],time[1],time[0]);8 b( F+ A9 O0 D0 `5 b
printf("time=%s\n",buffer);
/ W- _' u; H( ]2 Z' Q
  write_data_to_ds1302(0x8e,0x00);       & c; f5 c% p- Z& ~1 H7 Q& M

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);1 {3 S1 T; h- M! d
write_data_to_ds1302(0x84,0x23);
write_data_to_ds1302(0x86,0x17);! h" H6 [( s) q  |2 E! N
write_data_to_ds1302(0x88,0x03);, y5 {# Z* u5 k3 e9 N
write_data_to_ds1302(0x8A,0x04);
write_data_to_ds1302(0x8c,0x10);/ J" U, r- P- H3 G0 k

write_data_to_ds1302(0x8e,0x80);
, p, @5 ]8 W5 x7 [! t
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);

second[0]=read_data_from_ds1302(0x81);
      second[1]=read_data_from_ds1302(0x83);
      ( d7 E& v. L1 |/ P8 A7 G
      second[2]=second[0]/16*10+second[0]%16;" b# O/ @# X+ R# M& r
      second[3]=second[1]/16*10+second[1]%16;) E9 L" V* C* `1 k+ V, [7 r

      printf("second=%d,%d,%d,%d\n",second[0],second[1],second[2],second[3]);9 |% _2 x+ n( L1 Y) K$ Q; L
usleep(1000000);
}

return 0;
}

console控制台出现的结果是

nios2-terminal: Warning: The JTAG cable you are using is not supported for Nios  w+ n* J: Z1 q$ E. z! J
nios2-terminal: II systems.  You may experience intermittent JTAG communication! l  n3 W) G, N$ Q0 {7 u
nios2-terminal: failures with this cable.  Please use a USB Blaster revision B8 }3 P1 V( Z" ?# J4 B
nios2-terminal: cable or another supported cable.  Please refer to the file# C2 [' C' R6 w/ @% G( v5 H
nios2-terminal: errata.txt included in the Nios II development kit documents
nios2-terminal: directory for more information.6 ~' s3 Z. X5 a' b

nios2-terminal: connected to hardware target using JTAG UART on cable/ G- d6 W- P+ G: h
nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0
nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)/ B4 W0 U9 a- A( U' W6 j" N

time=2016-3-23　35:22:0

time=2010-3-17　23:33:0
/ `8 v  i2 K% q: b1 M3 h
second=0,51,0,33
time=2010-3-17　23:33:0* h2 F# O! {: x
3 e" u0 Y( W. R; N2 d
second=0,51,0,338 m: k1 c) ]+ A/ ~5 e- j
time=2010-3-17　23:33:0

second=0,51,0,33
time=2010-3-17　23:33:04 q9 K8 ^3 n) D1 `& {5 v6 Y
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。9 `1 z" |4 ?) G% e4 C% B

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。
想起什么问题再添加吧。
7 E9 P8 X" v( _! O3 r& e, @$ ^/ 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。
( B8 n, W3 C% i' J4 w
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