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Arduino/hardware/arduino/sam/system/libsam/source/pmc.c
2012-04-12 10:37:02 +02:00

184 lines
5.3 KiB
C

/* ----------------------------------------------------------------------------
* SAM Software Package License
* ----------------------------------------------------------------------------
* Copyright (c) 2011, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "chip.h"
//#include <assert.h>
/*----------------------------------------------------------------------------
* Local definitions
*----------------------------------------------------------------------------*/
#define MASK_STATUS0 0xFFFFFFFC
#define MASK_STATUS1 0xFFFFFFFF
/*----------------------------------------------------------------------------
* Exported functions
*----------------------------------------------------------------------------*/
/**
* \brief Enables the clock of a peripheral. The peripheral ID is used
* to identify which peripheral is targetted.
*
* \note The ID must NOT be shifted (i.e. 1 << ID_xxx).
*
* \param id Peripheral ID (ID_xxx).
*/
extern void PMC_EnablePeripheral( uint32_t dwId )
{
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3XA_)
//assert( dwId < 35 ) ;
if ( dwId < 32 )
{
if ( (PMC->PMC_PCSR0 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
{
// TRACE_DEBUG( "PMC_EnablePeripheral: clock of peripheral" " %u is already enabled\n\r", dwId ) ;
}
else
{
PMC->PMC_PCER0 = 1 << dwId ;
}
}
else
{
dwId -= 32;
if ((PMC->PMC_PCSR1 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId))
{
// TRACE_DEBUG( "PMC_EnablePeripheral: clock of peripheral" " %u is already enabled\n\r", dwId + 32 ) ;
}
else
{
PMC->PMC_PCER1 = 1 << dwId ;
}
}
#elif (defined _SAM3N_) || (defined _SAM3U_)
if ( (PMC->PMC_PCSR0 & ((uint32_t)1 << dwId)) != ((uint32_t)1 << dwId) )
{
PMC->PMC_PCER0 = 1 << dwId ;
}
#else
#error "The specified chip is not supported."
#endif
}
/**
* \brief Disables the clock of a peripheral. The peripheral ID is used
* to identify which peripheral is targetted.
*
* \note The ID must NOT be shifted (i.e. 1 << ID_xxx).
*
* \param id Peripheral ID (ID_xxx).
*/
extern void PMC_DisablePeripheral( uint32_t dwId )
{
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3XA_)
//assert( dwId < 35 ) ;
if ( dwId < 32 )
{
if ( (PMC->PMC_PCSR0 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
{
PMC->PMC_PCDR0 = 1 << dwId ;
}
}
else
{
dwId -= 32 ;
if ( (PMC->PMC_PCSR1 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
{
PMC->PMC_PCDR1 = 1 << dwId ;
}
}
#elif (defined _SAM3N_) || (defined _SAM3U_)
if ( (PMC->PMC_PCSR0 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
{
PMC->PMC_PCDR0 = 1 << dwId ;
}
#else
#error "The specified chip is not supported."
#endif
}
/**
* \brief Get the status of the specified peripheral clock.
*
* \note The ID must NOT be shifted (i.e. 1 << ID_xxx).
*
* \param dwId Peripheral ID (ID_xxx).
*
* \retval 0 Clock is active.
* \retval 1 Clock is inactive.
* \retval 2 Invalid parameter.
*/
extern uint32_t PMC_IsPeripheralEnabled( uint32_t dwId )
{
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3XA_)
//assert( dwId < 35 ) ;
if ( dwId < 32 )
{
if ( PMC->PMC_PCSR0 & (1 << dwId) )
{
return 0 ;
}
else
{
return 1 ;
}
}
else
{
if ( PMC->PMC_PCSR1 & (1 << (dwId - 32)) )
{
return 0 ;
}
else
{
return 1 ;
}
}
#elif (defined _SAM3N_) || (defined _SAM3U_)
if ( (PMC->PMC_PCSR0 & ((uint32_t)1 << dwId)) )
{
return 0 ;
}
else
{
return 1 ;
}
#else
#error "The specified chip is not supported."
#endif
}