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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [drivers/] [Atmel/] [at91lib/] [peripherals/] [pmc/] [pmc.c] - Rev 609
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/* ---------------------------------------------------------------------------- * ATMEL Microcontroller Software Support * ---------------------------------------------------------------------------- * Copyright (c) 2008, 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 "pmc.h" #include <board.h> #include <utility/assert.h> #include <utility/trace.h> //------------------------------------------------------------------------------ // Global functions //------------------------------------------------------------------------------ #if defined(at91sam7l64) || defined(at91sam7l128) //------------------------------------------------------------------------------ /// Sets the fast wake-up inputs that can get the device out of Wait mode. /// \param inputs Fast wake-up inputs to enable. //------------------------------------------------------------------------------ void PMC_SetFastWakeUpInputs(unsigned int inputs) { SANITY_CHECK((inputs & ~0xFF) == 0); AT91C_BASE_PMC->PMC_FSMR = inputs; } #if !defined(__ICCARM__) __attribute__ ((section (".ramfunc"))) // GCC #endif //------------------------------------------------------------------------------ /// Disables the main oscillator, making the device enter Wait mode. //------------------------------------------------------------------------------ void PMC_DisableMainOscillatorForWaitMode(void) { AT91C_BASE_PMC->PMC_MOR = 0x37 << 16; while ((AT91C_BASE_PMC->PMC_MOR & AT91C_PMC_MAINSELS) != AT91C_PMC_MAINSELS); } #endif #if defined(at91sam7l) //------------------------------------------------------------------------------ /// Disables the main oscillator when NOT running on it. //------------------------------------------------------------------------------ void PMC_DisableMainOscillator(void) { AT91C_BASE_PMC->PMC_MOR = 0x37 << 16; while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MAINSELS) == AT91C_PMC_MAINSELS); } #endif //------------------------------------------------------------------------------ /// Disables the processor clock, making the device enter Idle mode. //------------------------------------------------------------------------------ void PMC_DisableProcessorClock(void) { AT91C_BASE_PMC->PMC_SCDR = AT91C_PMC_PCK; while ((AT91C_BASE_PMC->PMC_SCSR & AT91C_PMC_PCK) != AT91C_PMC_PCK); } //------------------------------------------------------------------------------ /// Enables the clock of a peripheral. The peripheral ID (AT91C_ID_xxx) is used /// to identify which peripheral is targetted. /// Note that the ID must NOT be shifted (i.e. 1 << AT91C_ID_xxx). /// \param id Peripheral ID (AT91C_ID_xxx). //------------------------------------------------------------------------------ void PMC_EnablePeripheral(unsigned int id) { SANITY_CHECK(id < 32); if ((AT91C_BASE_PMC->PMC_PCSR & (1 << id)) == (1 << id)) { trace_LOG(trace_INFO, "-I- PMC_EnablePeripheral: clock of peripheral" " %u is already enabled\n\r", id); } else { AT91C_BASE_PMC->PMC_PCER = 1 << id; } } //------------------------------------------------------------------------------ /// Disables the clock of a peripheral. The peripheral ID (AT91C_ID_xxx) is used /// to identify which peripheral is targetted. /// Note that the ID must NOT be shifted (i.e. 1 << AT91C_ID_xxx). /// \param id Peripheral ID (AT91C_ID_xxx). //------------------------------------------------------------------------------ void PMC_DisablePeripheral(unsigned int id) { SANITY_CHECK(id < 32); if ((AT91C_BASE_PMC->PMC_PCSR & (1 << id)) != (1 << id)) { trace_LOG(trace_INFO, "-I- PMC_DisablePeripheral: clock of peripheral" " %u is not enabled\n\r", id); } else { AT91C_BASE_PMC->PMC_PCDR = 1 << id; } }
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