请教:在S3C2410上运行读RTC程序出错

Question

如下是我的读RTC c程序,交叉编译成功但在板子上运行时出错:
#include "2410addr.h"
char *day[8] = {" ","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};

void main(void)
{
    int year,tmp;
    int year,tmp,key;                  
    int month,date,weekday,hour,min,sec;
    rRTCCON = 0x01;    //No reset, Merge BCD counters, 1/32768, RTC Control enable

   
      
            if(rBCDYEAR==0x99)
                year = 0x1999;
            else
                year    = 0x2000 + rBCDYEAR;
            month   = rBCDMON;
            weekday = rBCDDAY;
            date    = rBCDDATE;
            hour    = rBCDHOUR;
            min     = rBCDMIN;
            sec     = rBCDSEC;
         printf("%2x : %2x : %2x  %10s,  %2x/%2x/%4x\n",hour,min,sec,day[weekday],month,date,year);
//        printf("%2x : %2x : %2x  %9s,  %2x/%2x/%4x     rBCDDATE = %x, weekday= %x\n",hour,min,sec,day[weekday],month,date,year,rBCDDATE,weekday);        
   
    rRTCCON = 0x0; //No reset, Merge BCD counters, 1/32768, RTC Control disable(for power consumption)

}
头文件定义如下:
#ifdef __BIG_ENDIAN
#define rRTCCON    (*(volatile unsigned char *)0x57000043) //RTC control
#define rTICNT     (*(volatile unsigned char *)0x57000047) //Tick time count
#define rRTCALM    (*(volatile unsigned char *)0x57000053) //RTC alarm control
#define rALMSEC    (*(volatile unsigned char *)0x57000057) //Alarm second
#define rALMMIN    (*(volatile unsigned char *)0x5700005b) //Alarm minute
#define rALMHOUR   (*(volatile unsigned char *)0x5700005f) //Alarm Hour
#define rALMDATE   (*(volatile unsigned char *)0x57000063) //Alarm day     <-- May 06, 2002 SOP
#define rALMMON    (*(volatile unsigned char *)0x57000067) //Alarm month
#define rALMYEAR   (*(volatile unsigned char *)0x5700006b) //Alarm year
#define rRTCRST    (*(volatile unsigned char *)0x5700006f) //RTC round reset
#define rBCDSEC    (*(volatile unsigned char *)0x57000073) //BCD second
#define rBCDMIN    (*(volatile unsigned char *)0x57000077) //BCD minute
#define rBCDHOUR   (*(volatile unsigned char *)0x5700007b) //BCD hour
#define rBCDDATE   (*(volatile unsigned char *)0x5700007f) //BCD day       <-- May 06, 2002 SOP
#define rBCDDAY    (*(volatile unsigned char *)0x57000083) //BCD date      <-- May 06, 2002 SOP
#define rBCDMON    (*(volatile unsigned char *)0x57000087) //BCD month
#define rBCDYEAR   (*(volatile unsigned char *)0x5700008b) //BCD year

#else //Little Endian
#define rRTCCON    (*(volatile unsigned char *)0x57000040) //RTC control
#define rTICNT     (*(volatile unsigned char *)0x57000044) //Tick time count
#define rRTCALM    (*(volatile unsigned char *)0x57000050) //RTC alarm control
#define rALMSEC    (*(volatile unsigned char *)0x57000054) //Alarm second
#define rALMMIN    (*(volatile unsigned char *)0x5700005 //Alarm minute
#define rALMHOUR   (*(volatile unsigned char *)0x5700005c) //Alarm Hour
#define rALMDATE   (*(volatile unsigned char *)0x57000060) //Alarm day      <-- May 06, 2002 SOP
#define rALMMON    (*(volatile unsigned char *)0x57000064) //Alarm month
#define rALMYEAR   (*(volatile unsigned char *)0x5700006 //Alarm year
#define rRTCRST    (*(volatile unsigned char *)0x5700006c) //RTC round reset
#define rBCDSEC    (*(volatile unsigned char *)0x57000070) //BCD second
#define rBCDMIN    (*(volatile unsigned char *)0x57000074) //BCD minute
#define rBCDHOUR   (*(volatile unsigned char *)0x5700007 //BCD hour
#define rBCDDATE   (*(volatile unsigned char *)0x5700007c) //BCD day        <-- May 06, 2002 SOP
#define rBCDDAY    (*(volatile unsigned char *)0x57000080) //BCD date       <-- May 06, 2002 SOP
#define rBCDMON    (*(volatile unsigned char *)0x57000084) //BCD month
#define rBCDYEAR   (*(volatile unsigned char *)0x5700008 //BCD year
#endif  //RTC
在开发板运行时报如下错误:
pc : [<000083c0>]    lr : [<40039d90>]    Not tainted
sp : bffffe60  ip : bffffea4  fp : bffffea0
r10: 400dc26c  r9 : 000083a0  r8 : 00000001
r7 : 4001fe94  r6 : 0000825c  r5 : bffffec4  r4 : 00000648
r3 : 57000040  r2 : 00000001  r1 : 00000001  r0 : 00000001
Flags: nZCv  IRQs on  FIQs on  Mode USER_32  Segment user
Control: C000317F  Table: 33DC8000  DAC: 00000015
Segmentation fault

请教各位大侠,问题出在哪里??热切等待达人的回复!!

Answer 1

在用户空间不能直接操作寄存器，你需要相应的驱动。

Answer 2

谢谢leonevictor,我RTC驱动已加载了,在LINUX下可以用#cat /proc/driver/rtc读出系统时间，并能用hwclock修改，但我想在C下修改和读出RTC时间而不是在LINUX的SHELL下用命令读出和修改RTC时间，请问我那段C应怎样做？？

Answer 3

谢谢leonevictor,我RTC驱动已加载了,在LINUX下可以用#cat /proc/driver/rtc读出系统时间，并能用hwclock修改，但我想在C下修改和读出RTC时间而不是在LINUX的SHELL下用命令读出和修改RTC时间，请问我那段C应怎样做？？

Answer 4

看驱动程序提供出来的函数接口。