omap30_armmbx.c

有关于USB的一些主机端驱动

//-------------------------------------------------------------------------------
//          TEXAS INSTRUMENTS INCORPORATED PROPRIETARY INFORMATION  
//   Property of Texas Instruments
//   For Unrestricted Internal Use Only
//   Unauthorized reprofuction and/or distribution is strictly prohibited.
//   This product is protected under copyright law and trade secret law
//   as an unpublished work
//   Created 2000,  (C) Copyright 2000 Texas Instruments. All rights reserved
//
//------------------------------------------------------------------------------
#include "omap30.h"

//------------------------------------------------------------------------------
//
//  FUNCTIONS
//
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
// NAME        : Mailbox_Write
// DESCRIPTION : Write data to Mailbox registers :
//                 - ARM2DSP1 and ARM2DSP1B if ARM2DSP1_FLAG[0] == 0
//                 - ARM2DSP2 and ARM2DSP2B if ARM2DSP2_FLAG[0] == 0
// PARAMETERS  : Mailbox       ARM2DSP1 or ARM2DSP2
//               Data1         data to first register
//               Data2         data to second register
// RETURN VALUE: TRUE if write done successfully, otherwise FALSE
// LIMITATIONS : None
//------------------------------------------------------------------------------
BOOL Mailbox_Write(Mailbox_Enum_t Mailbox, UWORD16 Data1, UWORD16 Data2)
{
  switch (Mailbox)
  {
  case ARM2DSP1 :
    {
      if ( ( ARMMBX_ARM2DSP_INT1_FLAG & ARMMBX_ARM2DSP_FLAG_MASK ) == 0x0000 )
	{
	  ARMMBX_ARM2DSP1  = Data1;
	  ARMMBX_ARM2DSP1B = Data2;
	  return(TRUE);
	}
      else
	return(FALSE);
      break;
    }

  case ARM2DSP2 :
    {
      if ( ( ARMMBX_ARM2DSP_INT2_FLAG & ARMMBX_ARM2DSP_FLAG_MASK ) == 0x0000 )
	{
	  ARMMBX_ARM2DSP2  = Data1;
	  ARMMBX_ARM2DSP2B = Data2;
	  return(TRUE);
	}
      else
	return(FALSE);
      break;
    }

  default :
    {
      return(FALSE);
      break;
    }
  }
}


//------------------------------------------------------------------------------
// NAME        : Mailbox_Read
// DESCRIPTION : Read data from Mailbox registers :
//                 - ARM2DSP1 and ARM2DSP1B
//                 - ARM2DSP2 and ARM2DSP2B
//                 - DSP2ARM1 and DSP2ARM1B
//                 - DSP2ARM2 and DSP2ARM2B
// PARAMETERS  : Mailbox       ARM2DSP1, ARM2DSP2, DSP2ARM1 or DSP2ARM2
//               *Ptr1         pointer on data from first register
//               *Ptr2         pointer on data from second register
// RETURN VALUE: None
// LIMITATIONS : None
//------------------------------------------------------------------------------
void Mailbox_Read(Mailbox_Enum_t Mailbox, UWORD16 *Ptr1, UWORD16 *Ptr2)
{
  switch (Mailbox)
  {
  case ARM2DSP1 :
    {
      *Ptr1 = ARMMBX_ARM2DSP1;
      *Ptr2 = ARMMBX_ARM2DSP1B;
      break;
    }

  case ARM2DSP2 :
    {
      *Ptr1 = ARMMBX_ARM2DSP2;
      *Ptr2 = ARMMBX_ARM2DSP2B;
      break;
    }
    
  case DSP2ARM1 :
    {
      *Ptr1 = ARMMBX_DSP2ARM1;
      *Ptr2 = ARMMBX_DSP2ARM1B;
      break;
    }

  case DSP2ARM2 :
    {
      *Ptr1 = ARMMBX_DSP2ARM2;
      *Ptr2 = ARMMBX_DSP2ARM2B;
      break;
    }
    
  default:
    break;
  }
  return;
}

//------------------------------------------------------------------------------
// NAME        : Mailbox_Clear
// DESCRIPTION : Clear the interrupt send by the DSP :
//                 - DSP2ARM_INT1B
//                 - DSP2ARM_INT2B
// PARAMETERS  : Mailbox       DSP2ARM1 or DSP2ARM2
// RETURN VALUE: None
// LIMITATIONS : None
//------------------------------------------------------------------------------
void Mailbox_Clear(Mailbox_Enum_t Mailbox)
{
  switch (Mailbox)
  {
  case DSP2ARM1 :
    ARMMBX_DSP2ARM1 = 0x0000;
    ARMMBX_DSP2ARM1B = 0x0000;
    break;
  case DSP2ARM2 :
    ARMMBX_DSP2ARM2 = 0x0000;
    ARMMBX_DSP2ARM2B = 0x0000;
    break;
  default :
    break;
  }
}