dspmbx.c

以TI 公司的OMAP5910为例

//////////////////////////////////////////////////////////////////////////
//            Copyright (C) 2004, Eyoka @ Microunit
//                           All Rights Reserved
//________________________________________________________________________
//
// FILENAME:    dspmbx.c
// PROJECT:     High-Resolution Video System On OMAP
// MODULE:      DSP System
// DESCRIPTION: DSP Mailbox support.
// TARGET CPU:  DSP-C55xx of OMAP5910
// VERSION:     1.1
//________________________________________________________________________
//
// REVISE HISTORY
// DATE         VERSION AUTHOR  DESCRIPTION
// UNFINISHED   1.1     Eyoka   Modified with new ARMSYS.
// 2004-10-13   1.0     Eyoka   First release.
//////////////////////////////////////////////////////////////////////////

#include "dspmbx.h"


/////////////////////////////////////////////////////////////////////
// MAILBOX FUNCTIONS
/////////////////////////////////////////////////////////////////////

//___________________________________________________________________
// Function: MBX_Write1
// Usage: Write data and command to mailbox1.
// Parameters:
//    data			- data to be written to ARM mailbox1
//    cmd			- command to be written to ARM mailbox1
// Return Values:
//    BOOL		TRUE if successful; FALSE if not(mailbox maybe busy)
//___________________________________________________________________
//
BOOL MBX_Write1(WORD data, WORD cmd)
{
	WORD flag = MBX_DSP2ARM1_FLAG & 0x0001;
	if(flag)
	{
		return FALSE;
	}

	MBX_DSP2ARM1 = data;
	MBX_DSP2ARM1B = cmd;
	return TRUE;
}

//___________________________________________________________________
// Function: MBX_Write2
// Usage: Write data and command to mailbox2.
// Parameters:
//    data			- data to be written to ARM mailbox2
//    cmd			- command to be written to ARM mailbox2
// Return Values:
//    BOOL		TRUE if successful; FALSE if not(mailbox maybe busy)
//___________________________________________________________________
//
BOOL MBX_Write2(WORD data, WORD cmd)
{
	WORD flag = MBX_DSP2ARM2_FLAG & 0x0001;
	if(flag)
	{
		return FALSE;
	}

	MBX_DSP2ARM2 = data;
	MBX_DSP2ARM2B = cmd;
	return TRUE;
}



// the end
//////////////////////////////////////////////////////////////////////////