powerinit.c

ADSP-BF561的应用程序

/*********************************************************************************

Copyright(c) 2005 Analog Devices, Inc. All Rights Reserved. 

This software is proprietary and confidential.  By using this software you agree
to the terms of the associated Analog Devices License Agreement.  

Description:
			 Configures the Power Management and EBIU modules for the 
			 ADSP-BF561 EZ-KIT LITE in Dual Core Operation.
			 
*********************************************************************************/
#include <services/services.h>

#define DO_NOT_CHANGE_MMR_SETTINGS 0

static void InitPower(void);
static void InitSDRAM(void);

static ADI_EBIU_SDRAM_BANK_VALUE bank_size = {0, ADI_EBIU_SDRAM_BANK_64MB};

/*********************************************************************
	Function:		Init
	Description:	Performs Core specific initialization
*********************************************************************/
void Init(void)
{
	if ( (*ADI_SRAM_BASE_ADDR_MMR) == ADI_COREA ) {
		// Hand over settings for the BF 561EZ-KIT
		// (Will not be written into EBIU registers.
		// thats the job for InitPower)
		InitSDRAM();
	}
	// Initialize the power management module
	InitPower();
}
/*********************************************************************
	Function:		InitPower
	Description:	Initializes the Power Management module
********************************************************************/
static void InitPower(void)
{
	ADI_PWR_RESULT 	PWRResult;
	
	// The following command table describes the configuration for the ADSP-BF561 EZ-KIT.
	// All commands (except ADI_PWR_CMD_END) are equivalent to the single command 
	//		{ ADI_PWR_CMD_SET_EZKIT, (void*)ADI_PWR_EZKIT_BF561_600MHZ }
	//
	ADI_PWR_COMMAND_PAIR ezkit_power[] = {
		{ ADI_PWR_CMD_SET_EZKIT,		ADI_PWR_EZKIT_BF561_600MHZ},	// Use BF561 EZ-KIT
		{ ADI_PWR_CMD_END,										0}		// No more commands
	};

	// Pass the above table to the Intialization routine
	PWRResult = adi_pwr_Init( ezkit_power );
	if ((PWRResult != ADI_PWR_RESULT_SUCCESS) && (PWRResult != ADI_PWR_RESULT_CALL_IGNORED)) {
		while(1);
	}

	PWRResult = adi_pwr_SetFreq( 0, 130, ADI_PWR_DF_OFF);	// Try highest speed
	*pEBIU_SDGCTL |= 2;		// turn on clockout to check SCLK!
}
/*********************************************************************
	Function:		InitSDRAM
	Description:	Initializes the EBIU module with the required SDRAM 
				    settings.
*********************************************************************/
static void InitSDRAM(void)
{
	ADI_EBIU_RESULT EBIUResult;
	
	// The following command table describes the configuration for the ADSP-BF561 EZ-KIT, 
	// which uses two Micron MT48LC16M16A2-75 (4Meg x 16 x 4 banks) memory modules to give
	// a total of 64MB.
	//
	// This is the most general specification, as the values can be set according to the 
	// datasheet of the memory modules to be configured.
	//
	ADI_EBIU_COMMAND_PAIR ezkit_sdram[] = {	
		{ ADI_EBIU_CMD_SET_SDRAM_BANK_SIZE,		(void*)&bank_size                             },
		{ ADI_EBIU_CMD_SET_SDRAM_MODULE, 		(void*)ADI_EBIU_SDRAM_MODULE_MT48LC16M16A2_75 },
		{ ADI_EBIU_CMD_END, 0}
	};
	
	// Pass the above table to the Intialization routine
	EBIUResult = adi_ebiu_Init( ezkit_sdram, DO_NOT_CHANGE_MMR_SETTINGS );
	if ((EBIUResult != ADI_EBIU_RESULT_SUCCESS) && (EBIUResult != ADI_EBIU_RESULT_CALL_IGNORED)) {
		while(1);
	}
}