134 lines
5.3 KiB
C
134 lines
5.3 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include "pmc.h"
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#include <board.h>
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#include <utility/assert.h>
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#include <utility/trace.h>
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//------------------------------------------------------------------------------
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// Global functions
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//------------------------------------------------------------------------------
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#if defined(at91sam7l64) || defined(at91sam7l128)
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//------------------------------------------------------------------------------
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/// Sets the fast wake-up inputs that can get the device out of Wait mode.
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/// \param inputs Fast wake-up inputs to enable.
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//------------------------------------------------------------------------------
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void PMC_SetFastWakeUpInputs(unsigned int inputs)
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{
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SANITY_CHECK((inputs & ~0xFF) == 0);
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AT91C_BASE_PMC->PMC_FSMR = inputs;
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}
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#if !defined(__ICCARM__)
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__attribute__ ((section (".ramfunc"))) // GCC
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#endif
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//------------------------------------------------------------------------------
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/// Disables the main oscillator, making the device enter Wait mode.
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//------------------------------------------------------------------------------
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void PMC_DisableMainOscillatorForWaitMode(void)
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{
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AT91C_BASE_PMC->PMC_MOR = 0x37 << 16;
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while ((AT91C_BASE_PMC->PMC_MOR & AT91C_PMC_MAINSELS) != AT91C_PMC_MAINSELS);
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}
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#endif
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#if defined(at91sam7l)
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//------------------------------------------------------------------------------
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/// Disables the main oscillator when NOT running on it.
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//------------------------------------------------------------------------------
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void PMC_DisableMainOscillator(void)
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{
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AT91C_BASE_PMC->PMC_MOR = 0x37 << 16;
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while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MAINSELS) == AT91C_PMC_MAINSELS);
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}
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#endif
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//------------------------------------------------------------------------------
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/// Disables the processor clock, making the device enter Idle mode.
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//------------------------------------------------------------------------------
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void PMC_DisableProcessorClock(void)
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{
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AT91C_BASE_PMC->PMC_SCDR = AT91C_PMC_PCK;
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while ((AT91C_BASE_PMC->PMC_SCSR & AT91C_PMC_PCK) != AT91C_PMC_PCK);
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}
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//------------------------------------------------------------------------------
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/// Enables the clock of a peripheral. The peripheral ID (AT91C_ID_xxx) is used
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/// to identify which peripheral is targetted.
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/// Note that the ID must NOT be shifted (i.e. 1 << AT91C_ID_xxx).
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/// \param id Peripheral ID (AT91C_ID_xxx).
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//------------------------------------------------------------------------------
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void PMC_EnablePeripheral(unsigned int id)
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{
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SANITY_CHECK(id < 32);
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if ((AT91C_BASE_PMC->PMC_PCSR & (1 << id)) == (1 << id)) {
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trace_LOG(trace_INFO,
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"-I- PMC_EnablePeripheral: clock of peripheral"
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" %u is already enabled\n\r",
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id);
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}
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else {
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AT91C_BASE_PMC->PMC_PCER = 1 << id;
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}
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}
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//------------------------------------------------------------------------------
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/// Disables the clock of a peripheral. The peripheral ID (AT91C_ID_xxx) is used
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/// to identify which peripheral is targetted.
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/// Note that the ID must NOT be shifted (i.e. 1 << AT91C_ID_xxx).
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/// \param id Peripheral ID (AT91C_ID_xxx).
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//------------------------------------------------------------------------------
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void PMC_DisablePeripheral(unsigned int id)
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{
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SANITY_CHECK(id < 32);
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if ((AT91C_BASE_PMC->PMC_PCSR & (1 << id)) != (1 << id)) {
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trace_LOG(trace_INFO,
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"-I- PMC_DisablePeripheral: clock of peripheral"
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" %u is not enabled\n\r",
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id);
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}
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else {
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AT91C_BASE_PMC->PMC_PCDR = 1 << id;
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}
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}
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