// CPU speed tests



#include "gpdef.h"

#include "gpstdlib.h"

#include "gpgraphic.h"

#include "gpstdio.h"

#include "gpfont.h"



GPDRAWSURFACE gpDraw;

char tmp_string[256];

char FileName[256];

#define TEXT_RED 0xE0

#define TEXT_BLACK 0



// pllset.exe was used to calculate the CPU divisor speed

// values below. It can be obtained from Samsung's website in

// the same place as you find the cpu datasheet on their site.

//

// Example:

//  pllset 2 12000000 99000000

//    (To find divisor value for 99MHz clock.)

//

// NOTE: Messing with the CPU clock speed also can change

// various other timings (besides just the CPU) so do not change

// the CPU speed for any standard application until you read the

// CPU data sheet and fully understand what is going on.



void GpError (char* text)

   {

   GpTextOut(NULL, &gpDraw, 0, 16, text, TEXT_RED);

	while(1);

   }



void delay (void)

   {

   int i;

   int j;

   for (i=0; i<10000; i++)

      for (j=0; j<10000; j++)

         {}

   }



void GpMain (void *arg)

   {

   int i,Fout;

   unsigned char * p_buf;

   unsigned long m_size;

   int Loop = 1;

   int Pressed = 0;

   int Value = 0;

   unsigned char keydata;

   int ExKey;

   int Redraw = 0;



//    ERR_CODE err_code;

   F_HANDLE h_file;



   int cy;

   int entry_start_idx;

   int FileCount;



   ERR_CODE err_code;

   GPDIRENTRY *p_list;

   unsigned long list_count = 0, read_count = 0;

   GPFILEATTR mAttr;



   i = GpLcdSurfaceGet(&gpDraw, 0);



   GpSurfaceSet(&gpDraw);



   GpRectFill(NULL, &gpDraw, 0, 0, 320, 240, 0xff);

   i = * (int *)0x14800004;

   sprintf (tmp_string, "MDIV=0x%x, PDIV=0x%x, SDIV=%d", i>>12, (i>>4)&0x3f, i&3);

   GpTextOut (NULL, &gpDraw, 0, 32, (char*)tmp_string, TEXT_RED);



   Fout = ( ((i>>12)+8)*12000000 ) / ( (((i>>4)&0x3f)+2) * (1<<(i&3)) );



   sprintf (tmp_string, "CPU speed = %d MHz", Fout);

   GpTextOut (NULL, &gpDraw, 0, 48, (char*)tmp_string, TEXT_BLACK);



   sprintf (tmp_string, "On next screen select speed with Up/Dwn.");

   GpTextOut (NULL, &gpDraw, 0, 64, (char*)tmp_string, TEXT_RED);

   sprintf (tmp_string, "Then press Start & count until change.");

   GpTextOut (NULL, &gpDraw, 0, 80, (char*)tmp_string, TEXT_RED);



   sprintf (tmp_string, "Press Up or Down to continue");

   GpTextOut (NULL, &gpDraw, 0, 96, (char*)tmp_string, TEXT_BLACK);



   while (Loop)

      {

      if (Redraw)

         {

         GpRectFill(NULL, &gpDraw, 0, 0, 320, 240, 0xff);

         sprintf (tmp_string, " %x  ", Value);

         GpTextOut (NULL, &gpDraw, 0, 16, (char*)tmp_string, TEXT_RED);

         Redraw = 0;

         }



      GpKeyGetEx(&ExKey);

      keydata = ExKey & 0xff;



      if (Pressed == 0)

         {

         if ( ( keydata & GPC_VK_DOWN ) == GPC_VK_DOWN )

            {

            Value++;

            if (Value == 9) Value = 0;

            Pressed = 1;

            Redraw = 1;

            }

         if ( ( keydata & GPC_VK_UP ) == GPC_VK_UP )

            {

            if (Value == 0) Value = 9; else Value--;

            Pressed = 1;

            Redraw = 1;

            }

         if ( (ExKey & GPC_VK_START) ||

              (ExKey & GPC_VK_SELECT) )

            {

            Loop = 0;

            }

         }

      else

         {

         if ( ( ( keydata & GPC_VK_DOWN ) == GPC_VK_DOWN ) ||

              ( ( keydata & GPC_VK_UP ) == GPC_VK_UP ) )

            Pressed = 1;

         else

            Pressed = 0;

         }



      }



   switch (Value)

      {      // All values in seconds below are ~

      case 0:     // default - 21 seconds

         break;

      case 1:

         GpClockSpeedChange (40000000, 0x48013, 1); // 35.5 seconds

         break;

      case 2:

         GpClockSpeedChange (59250000, 0x47022, 1); // 24 seconds

         break;

      case 3:

         GpClockSpeedChange (67500000, 0x25002, 1); // 21 seconds

         break;

      case 4:

         GpClockSpeedChange (80000000, 0x48012, 1); // 17 seconds

         break;

      case 5:

         GpClockSpeedChange (99000000, 0x3a002, 1); // 14.5 seconds

         break;

      case 6:

         GpClockSpeedChange(105000000, 0x1b001, 1); // crash

         break;

      case 7:

         GpClockSpeedChange(110000000, 0x2f011, 1);

         break;

      case 8:

         GpClockSpeedChange(120000000, 0x34011, 1);

         break;

      case 9:

         GpClockSpeedChange(132000000, 0x3a011, 1);

         break;

      }



   while (1)

      {

      GpRectFill(NULL, &gpDraw, 0, 0, 320, 240, 0xff);

      GpTextOut (NULL, &gpDraw, 0, 16, "////", TEXT_RED);

      delay ();

      GpRectFill(NULL, &gpDraw, 0, 0, 320, 240, 0xff);

      GpTextOut (NULL, &gpDraw, 0, 16, "\\\\\\\\", TEXT_RED);

      delay ();

      }



   while (1) {}

   }