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。, y" `/ U8 D# k* F  L
#include <unistd.h>
#include "../inc/sopc.h"
#include "system.h"
#include <stdio.h>6 [' f) V+ K5 l7 F; s
#include "string.h", [3 ]! W) x( y
#include "altera_avalon_pio_regs.h"  M! r2 ]: O% H0 }7 ^
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unsigned char time[7]={0x00,0x16,0x23,0x17,0x03,0x17,0x10};//格式为:　秒　分　时　日　月　星期　年/ ?! L9 C3 f, D
static void delay(unsigned int dly);- v1 ^' P( }+ q; o3 B& A* I/ f% R
static void write_1byte_to_ds1302(unsigned char da);  m5 L" f( ~' v5 P, x
static unsigned char read_1byte_from_ds1302(void);! y/ Y$ P8 T4 O; {( l
static void write_data_to_ds1302(unsigned char addr,unsigned char da);4 T  A7 U4 s; m2 L2 L
static unsigned char read_data_from_ds1302(unsigned char addr);
void set_time(unsigned char *ti);. w  U* c3 X1 s+ r0 V/ ]
void get_time(char *ti);$ x+ |6 b% f' D. Q
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void delay(unsigned int dly)
{
for(;dly>0;dly--);0 a: y7 L6 x( ?' x" U
}

void write_1byte_to_ds1302(unsigned char da)
{  ?/ S5 c+ N% T/ g1 H" b( W
unsigned int i;6 x& o9 g4 x* t. {
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);2 S! C6 ]* m1 l9 ?1 s5 h3 C
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for(i=8;i>0;i--)
{
      if((da&0x01)!=0)8 D7 `5 h) {( R! ~8 o5 V
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,1);  }3 [3 ?' t2 a5 q. G) G3 ]7 R
      else/ C3 k/ y. u' O6 i( N
            IOWR_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE,0);1 V0 |1 Q, I! U2 X  X* ~

            delay(10);$ u( D! h: \! h
         IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);
      delay(20);
      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);! l( x% `$ N! V. X- ~0 T. O& }9 Q; P
      delay(10);
      da=da>>1;
}
}

unsigned char read_1byte_from_ds1302(void)
{
unsigned char i;( G& A: |! N" y9 h! v! E) l
unsigned char da=0,temp;0 u6 d; C2 s; ]8 ^4 f, H, {
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IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 0); 4 E. [+ Z' j. s( D

for(i=8;i>0;i--)6 L. S# K  P: v
{
      da=da>>1;6 D/ F: S% Q/ b: L* l
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      IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);+ Q% V+ y% ?1 h2 l8 X( R
      delay(20);
   IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);
               3 H% B, x& O" S
      temp=IORD_ALTERA_AVALON_PIO_DATA(RTC_DATA_BASE);6 V9 t& c& X9 }$ d0 F2 z
      if(temp!=0)* X) b: }, x* K" ]* P/ I& I) [
            da+=0x80;
            delay(10);
}
IOWR_ALTERA_AVALON_PIO_DIRECTION(RTC_DATA_BASE, 1);; |! C. o0 u9 q: j
return(da);1 V: s. n4 z* M; i5 z% O$ R
}( I: k2 c& |+ B0 t1 g- O# D) U7 @

void write_data_to_ds1302(unsigned char addr,unsigned char da)
{
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 K- \) X3 T/ A, Q# r5 ~, x
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);
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write_1byte_to_ds1302(addr);" i$ H  x4 z6 F$ Q& J; H
write_1byte_to_ds1302(da);" ?9 u# @7 r  j* U0 x1 W0 G; I. s/ q9 O
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IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);' Z4 u7 N- H4 {% P, N" B. m7 M$ W
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);3 h8 K/ P' k/ I8 a( o& W6 r
delay(40);
}

unsigned char read_data_from_ds1302(unsigned char addr); _* n6 o1 R+ D6 k2 x# X# w: ^
{  v8 z. i) }$ e- u( O2 {1 A: T
unsigned char da;! Y6 p  H& F. |: q) I5 q- X* l, b

IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,0);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);- @+ _. H6 _7 [5 i2 Z) ]( d
delay(40);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,1);2 D4 t: K5 o/ d0 r6 @+ {4 \) ^

write_1byte_to_ds1302(addr);% {  F' u* X+ E+ Q% D# `5 s$ c
da=read_1byte_from_ds1302();) O1 z* V; J4 k+ M: {

IOWR_ALTERA_AVALON_PIO_DATA(RTC_SCLK_BASE,1);
IOWR_ALTERA_AVALON_PIO_DATA(RTC_NRST_BASE,0);  r7 ?  i$ R; _* e$ j7 F0 G
delay(40);
return(da);
}  B7 X7 P, O7 [) }& j
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void set_time(unsigned char *ti)  y% s7 O! L) m& E4 S
{
unsigned char i;0 q# ~' Z$ R# T4 v1 Y/ t& D3 ?
unsigned char addr=0x80;, h% D: @3 K. ]  @
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write_data_to_ds1302(0x8e,0x00);% ~& D, K4 p3 J4 Y' [
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for(i=7;i>0;i--);
{
      write_data_to_ds1302(addr,*ti);
      ti++;% M/ \3 r+ u( H1 }/ p1 L
      addr+=2;
}
write_data_to_ds1302(0x8e,0x80);
}

void get_time(char *ti)! Q( v# e0 k) V& ^% q; X4 Y
{
unsigned char i;
unsigned char addr=0x81;
char time;3 E9 F, r: n( I! Y/ l: F
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for(i=0;i<7;i++)
{
      time=read_data_from_ds1302(addr);8 ^* F  n/ {, d' F$ n
   ti=time/16*10+time%16;3 s4 r  D4 P( V: G. r4 D& i( y7 U
      ; u' R1 d/ ~% R7 f
      addr+=2;
}
}2 s  U+ L+ N/ {) }1 L  j! d
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int main()
{! {- I- t( i: E# \

unsigned char buffer[50]="\0";1 l' [3 [2 H' t9 A) T6 p% y
unsigned char second[4];
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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 G& j2 B' n, p" y) v
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  write_data_to_ds1302(0x8e,0x00);

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);; Y& H- Z1 a5 t  c, F, e5 J
write_data_to_ds1302(0x84,0x23);
write_data_to_ds1302(0x86,0x17);
write_data_to_ds1302(0x88,0x03);- z1 M) @* F, O9 m
write_data_to_ds1302(0x8A,0x04);
write_data_to_ds1302(0x8c,0x10);
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write_data_to_ds1302(0x8e,0x80);
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while(1){
get_time(time);$ {4 S8 l% p4 W; ~1 b+ K* c8 {

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);' f6 J9 l& O* Y/ R! d, h: a% [
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second[0]=read_data_from_ds1302(0x81);- h/ J! r0 B+ Q& c# o: t! H; m
      second[1]=read_data_from_ds1302(0x83);, K  s! P2 F3 P
      3 d3 h% Y  H& z5 s; p* M
      second[2]=second[0]/16*10+second[0]%16;
      second[3]=second[1]/16*10+second[1]%16;

      printf("second=%d,%d,%d,%d\n",second[0],second[1],second[2],second[3]);  G, l9 _! f% ~( G7 \8 o
usleep(1000000);; X2 H% H4 X' _9 @. c
}) Z& A5 y$ N0 z; e/ z( A6 [; L, ?' v0 q

return 0;
}

console控制台出现的结果是, p3 O2 M* j2 Q% ^

nios2-terminal: Warning: The JTAG cable you are using is not supported for Nios7 H, Q4 I% S7 W- N3 C0 ]" l
nios2-terminal: II systems.  You may experience intermittent JTAG communication' y6 D- [$ U8 Z$ ^: R: N
nios2-terminal: failures with this cable.  Please use a USB Blaster revision B) j3 K0 k, E' d: ~
nios2-terminal: cable or another supported cable.  Please refer to the file" J6 d# x( F# s$ p
nios2-terminal: errata.txt included in the Nios II development kit documents: X  O& e" S" t1 U7 v
nios2-terminal: directory for more information.7 q, W- v5 e( y4 q
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nios2-terminal: connected to hardware target using JTAG UART on cable& T# I# X* s) W; e7 ]( T
nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0# R4 n& s+ w6 G" n6 a2 t. i
nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)5 A" z% k2 y7 C

time=2016-3-23　35:22:0

time=2010-3-17　23:33:0

second=0,51,0,33' }/ Y' Q7 i0 I' P- V, D5 i/ c
time=2010-3-17　23:33:0
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second=0,51,0,33* t, N' r* ~6 q; X) T6 B
time=2010-3-17　23:33:04 u* K% j/ `; |$ Q' N

second=0,51,0,33' n1 X! L& [& R+ i
time=2010-3-17　23:33:0) k2 b4 F. S0 [  ]4 }
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。
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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。3 T$ M8 G$ P+ L8 w$ F: P
想起什么问题再添加吧。, J7 n. E4 p9 i; a! a- q8 ?. k
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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。0 W: K( L  R5 x# I0 _
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另帮忙解释下ds1302时序图？怕理解错了，那些延时很重要吗？( ^) G# f9 ~0 }+ P" u4 g

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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