[ts-7000] Re:TS7250 ..RTC

["PeterElliot" <>]

Hi Laks,

I use the standard C time function to read the current time, and use 
a system call at the start of my program to sync the internal clock 
to the RTC.

printf("..Syncing time with RTC\n");
system("hwclock --hctosys");

An example of reading the time would be:

void TimeStampMenu(int Military) {
  int hour,min,month;
  char stringbuffer[32];

  time_t now;
  struct tm     *TimeNow;

  time(&now);
  TimeNow=localtime(&now);

  hour  = TimeNow->tm_hour;
  min   = TimeNow->tm_min;
  month = (TimeNow->tm_mon)+1;  
        
  if ((month<4) || (month>10)) hour-=5;
  else hour-=4;
        
  if (hour<0) hour+=24;
  if (Military) sprintf(stringbuffer,"%d:%02d",hour,min);
  else if (hour==0) sprintf(stringbuffer,"12:%02d AM",min);
  else if (hour==12) sprintf(stringbuffer,"12:%02d PM",min);
  else if (hour<12) sprintf(stringbuffer,"%d:%02d AM",hour,min);
  else sprintf(stringbuffer,"%d:%02d PM",(hour-12),min);
  
  while ((VGAregs[_vVIDCTRL] & 0x400)!=0);  // Wait for last BitBlt 
to finish.              
  Font_String(24,stringbuffer,VGAxy((_scrW-2),4),cWhite,_hTRight);
}                             
 
Hope this helps,

PJE


--- In  "Laks" <> wrote:
>
> Hi 
> how can i use the hwclock in my c source code?
> i need the time for my smart card reader which i am designing using 
the arm board
> 
> can i use the RTC base addr 0x1080_0000 as a pointer to access the 
rtc registers and its memory contents?
> being a memory mapped device will it work?
> 
> some of the sample codes i have seen mmap command to map the LCD / 
ADC etc.,
> 
> is it neceesary i have to use mmap to access the memory devices?
> 
> -laks




 
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