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uclock(), usleep(), localtime() and readdir() equivalents

 
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0xF



Joined: 22 Sep 2005
Posts: 1
PostPosted: Thu Sep 22, 2005 7:59 pm    Post subject: uclock(), usleep(), localtime() and readdir() equivalents Reply with quote
I'd like to know, how to get the following functionality from C:

  1. A clock with 1ms resolution or better.
  2. A sleep function with 1ms resolution or better
    (or should I spin in a loop using the above clock?)
  3. Realtime clock (year, month, day of month, day of week,
    hour, minute, second)
  4. Read memory card's or CD's directory
    (should I use fioD* from PS2SDK?)

Thank you.
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_tmator_



Joined: 15 Nov 2004
Posts: 19
Location: France
PostPosted: Fri Sep 23, 2005 1:08 am    Post subject: Reply with quote
Hi,

1 : See SDL timer code (SDL_Delay)
2 : Just create a thread and wait a sema sent by the thread when X ms will pass
3 : libcdvd i think but not sure
4 : See PS2MENU code in svn/ps2ware, it's a good example to know how read MC and CD'S directory
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DeRieux



Joined: 06 Jul 2006
Posts: 9
PostPosted: Thu Jul 06, 2006 10:16 am    Post subject: Re: usleep() Reply with quote
You can try the following code:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <tamtypes.h>
#include <sifcmd.h>
#include <kernel.h>
#include <sifrpc.h>
#include <string.h>
#include <sys/stat.h>
#include <debug.h>
#include <timer.h>

#define clearscreen() scr_clear() /*Defines easily understood macro */
#define DrawSimpleString(char) scr_printf(char) /* ditto */

void PauseBeforeClear(int wait_timer);
void SetScreenSize(int x, int y);

int main()
{   
   
   SifInitRpc(0);
   init_scr();

   
   SetScreenSize(80,25);
   DrawSimpleString("\nPause Execution for x Cpu_Ticks()\n");
   DrawSimpleString("\n..........Code By...............\n");
   DrawSimpleString("\n    William DeRieux, 5/5/2006   \n");   
   PauseBeforeClear(100); /* Timer in Cpu_Ticks()*/
 
   
   return(0);
   
}

void PauseBeforeClear(int wait_timer)
{
   int ticks = 0;
   
   do
   {
      ticks = cpu_ticks();
   }
   while (ticks != wait_timer);   
   
   if (ticks == wait_timer)
   {
      clearscreen();
   }

}

void SetScreenSize(int x, int y)
{
   scr_setXY(x,y);
}


This will draw some text on the screen, set the screen size, and then wait a set number of cpu_ticks and clear the screen.

William

Hope this may help.
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DeRieux



Joined: 06 Jul 2006
Posts: 9
PostPosted: Thu Jul 06, 2006 10:25 am    Post subject: Followup: Reply with quote
0xF wrote:
I'd like to know, how to get the following functionality from C:

  1. A clock with 1ms resolution or better.
  2. A sleep function with 1ms resolution or better
    (or should I spin in a loop using the above clock?)
  3. Realtime clock (year, month, day of month, day of week,
    hour, minute, second)
  4. Read memory card's or CD's directory
    (should I use fioD* from PS2SDK?)

Thank you.


Sleep Function - See My Last Post about cpu_ticks (in timer.h)

EDIT: The Sleep Function does wait a specified number of cpu ticks,
But, it is not consistent and is relatively unreliable...I do not
recommend using it as an actual timer, unless you just want to
pause for a little bit (not wait a specified number of seconds,
minutes, etc)

Shawn_t has a much better solution posted here:
http://forums.ps2dev.org/viewtopic.php?t=2842&highlight=clock+tick
(I will be making an additional post there, regarding using that solution to implement a fix for the timer)

clock function - possible use cpu_ticks as well

Realtime Clock - have a look at time.h
Quote:

snippet from time.h
struct tm
{
int tm_sec;
int tm_min;
int tm_hour;
int tm_mday;
int tm_mon;
int tm_year;
int tm_wday;
int tm_yday;
int tm_isdst;
};
[url][/url]
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