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https://github.com/arduino/Arduino.git
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159 lines
3.8 KiB
C
159 lines
3.8 KiB
C
/*
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%atmel_license%
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*/
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/*----------------------------------------------------------------------------
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* Headers
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*----------------------------------------------------------------------------*/
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#include "chip.h"
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#include <assert.h>
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/*----------------------------------------------------------------------------
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* Local definitions
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*----------------------------------------------------------------------------*/
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#define MASK_STATUS0 0xFFFFFFFC
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#define MASK_STATUS1 0xFFFFFFFF
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/*----------------------------------------------------------------------------
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* Exported functions
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*----------------------------------------------------------------------------*/
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/**
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* \brief Enables the clock of a peripheral. The peripheral ID is used
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* to identify which peripheral is targetted.
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*
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* \note The ID must NOT be shifted (i.e. 1 << ID_xxx).
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*
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* \param id Peripheral ID (ID_xxx).
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*/
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extern void PMC_EnablePeripheral( uint32_t dwId )
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{
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#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3XA_)
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assert( dwId < 35 ) ;
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if ( dwId < 32 )
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{
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if ( (PMC->PMC_PCSR0 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
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{
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// TRACE_DEBUG( "PMC_EnablePeripheral: clock of peripheral" " %u is already enabled\n\r", dwId ) ;
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}
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else
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{
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PMC->PMC_PCER0 = 1 << dwId ;
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}
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}
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else
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{
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dwId -= 32;
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if ((PMC->PMC_PCSR1 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId))
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{
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// TRACE_DEBUG( "PMC_EnablePeripheral: clock of peripheral" " %u is already enabled\n\r", dwId + 32 ) ;
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}
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else
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{
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PMC->PMC_PCER1 = 1 << dwId ;
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}
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}
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#elif (defined _SAM3N_) || (defined _SAM3U_)
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if ( (PMC->PMC_PCSR & ((uint32_t)1 << dwId)) != ((uint32_t)1 << dwId) )
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{
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PMC->PMC_PCER = 1 << dwId ;
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}
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#else
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#error "The specified chip is not supported."
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#endif
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}
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/**
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* \brief Disables the clock of a peripheral. The peripheral ID is used
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* to identify which peripheral is targetted.
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*
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* \note The ID must NOT be shifted (i.e. 1 << ID_xxx).
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*
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* \param id Peripheral ID (ID_xxx).
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*/
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extern void PMC_DisablePeripheral( uint32_t dwId )
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{
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#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3XA_)
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assert( dwId < 35 ) ;
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if ( dwId < 32 )
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{
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if ( (PMC->PMC_PCSR0 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
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{
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PMC->PMC_PCDR0 = 1 << dwId ;
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}
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}
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else
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{
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dwId -= 32 ;
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if ( (PMC->PMC_PCSR1 & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
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{
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PMC->PMC_PCDR1 = 1 << dwId ;
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}
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}
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#elif (defined _SAM3N_) || (defined _SAM3U_)
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if ( (PMC->PMC_PCSR & ((uint32_t)1 << dwId)) == ((uint32_t)1 << dwId) )
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{
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PMC->PMC_PCDR = 1 << dwId ;
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}
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#else
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#error "The specified chip is not supported."
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#endif
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}
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/**
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* \brief Get the status of the specified peripheral clock.
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*
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* \note The ID must NOT be shifted (i.e. 1 << ID_xxx).
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*
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* \param dwId Peripheral ID (ID_xxx).
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*
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* \retval 0 Clock is active.
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* \retval 1 Clock is inactive.
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* \retval 2 Invalid parameter.
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*/
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extern uint32_t PMC_IsPeripheralEnabled( uint32_t dwId )
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{
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#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3XA_)
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assert( dwId < 35 ) ;
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if ( dwId < 32 )
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{
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if ( PMC->PMC_PCSR0 & (1 << dwId) )
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{
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return 0 ;
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}
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else
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{
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return 1 ;
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}
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}
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else
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{
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if ( PMC->PMC_PCSR1 & (1 << (dwId - 32)) )
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{
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return 0 ;
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}
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else
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{
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return 1 ;
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}
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}
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#elif (defined _SAM3N_) || (defined _SAM3U_)
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if ( (PMC->PMC_PCSR & ((uint32_t)1 << dwId)) )
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{
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return 0 ;
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}
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else
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{
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return 1 ;
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}
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#else
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#error "The specified chip is not supported."
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#endif
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}
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