Problems setting the PSC on DaVinci DM365 GEL file on Code Composer Studio 4

Hello TI staff,

Beside my problems of setting the PLLs, I have met a spurious problem which did not occur before : the power and sleep controller for modules presents some infinite setup time.

Let me explain:

In my GEL file I have a Setup_Psc_All() procedure, that I made carefully not to set the reserved modules (as on evm files on few reserved modules which is problematic).

I followed the procedure explained on the ARM subsystem Datasheet.

And I got an infinite time/loop: on watching that the state has gone to the requested state in the MDSTAT register.

When I meet a problematic module, I remove it and then the 'error' propagates to the next one.

My procedure is here for information:

Any help is welcome.

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/* ------------------------------------------------------------------------ *
 *                                                                          *
 *  Setup_Psc_All_On( )                                                     *
 *      Enable all non-reserved power modules.                              *
 *                                                                          *
 * ------------------------------------------------------------------------ */
Setup_Psc_All_On( )
{
   
  unsigned char i=0;
  unsigned char lpsc_start;
  unsigned char lpsc_end,lpscgroup,lpscmin,lpscmax;
 
  lpscmin  =0;
  lpscmax  =3;

  GEL_TextOut( "Setup Power Modules (All on)... " );
 
  for(lpscgroup=lpscmin ; lpscgroup <=lpscmax; lpscgroup++)
  {
      if(lpscgroup==0)
      {
        lpsc_start = 0; // Enabling LPSC 0 to 15 SCR first
        lpsc_end   = 15;
      }
      else if(lpscgroup==1)
      {/* Skip reserved LPSCs 16 */
        lpsc_start = 17; // Enabling LPSC 17 to 28 SCR first
        lpsc_end   = 28;
      }
      else if (lpscgroup == 2)
      { /* Skip locked =(Always on or reserved) LPSCs [29-37] */
        lpsc_start = 38;
        lpsc_end   = 47;
      }
      else
      {
        lpsc_start = 50;
        lpsc_end   = 51;
      }
   
      //state=0x3=Enable LPSC's
      for(i=lpsc_start; i<=lpsc_end; i++)
      {     
           GEL_TextOut( "Module i= %d... ",,,,,i );     
        psc_change_state( i , 3 );                               
      }    
  }     

  GEL_TextOut("\nDM365 all Module Clocks are Turned on\n");   
}

/* ------------------------------------------------------------------------ *
 *                                                                          *
 *  psc_change_state( id, state )                                           *
 *      id    = Domain #ID                                                  *
 *      state = ( ENABLE, DISABLE, SYNCRESET, RESET )                       *
 *              (   =3  ,   =2   ,    =1    ,   =0  )                       *
 *                                                                          *
 * ------------------------------------------------------------------------ */
psc_change_state( int id, int state )
{

    int* mdstat                 = ( int* )( 0x01c41800 + ( 4 * id ) );
    int* mdctl                  = ( int* )( 0x01c41a00 + ( 4 * id ) );
    int set_interrupt;

    /*
     *  Step 0 - Ignore request if the state is already set as is
     */
    if ( ( ( *mdstat ) & 0x1f ) == state )
        return;

    /*
     *  Step 1 - Wait for PTSTAT.GOSTAT to clear = previous transitions must finish
     */
    while( PSC_PTSTAT & 1 )
    {
           GEL_TextOut( "waiting PTSTAT for %d... ",,,,,id );       
    };

    /*
     *  Step 2 - Set MDCTLx.NEXT to new state
     */
    *mdctl &= ~0x1f;
    *mdctl |= state;

    /*
     *  Step 3 - Start power transition ( set PTCMD.GO to 1 )
     */
    PSC_PTCMD |= 1;

    /*
     *  Step 4 - Wait for PTSTAT.GOSTAT to clear
     */
    while( PSC_PTSTAT & 1 )
    {
           GEL_TextOut( "waiting PTSTAT for %d... ",,,,,id );       
    };
    /*
     *  Step 5 - Wait for MDSTAT to be set to requested state
     */
    while ( (*mdstat)&0x1f != state )
    {
           GEL_TextOut( "waiting MDSTAT for %d go for %d... ",,,,,id,state );       
    };
}

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