/* ---------------------------------------------------------------------------- | |
* SAM Software Package License | |
* ---------------------------------------------------------------------------- | |
* Copyright (c) 2012, 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 functions | |
*----------------------------------------------------------------------------*/ | |
/** | |
* \brief Select external 32K Crystal. | |
* | |
*/ | |
void SUPC_SelectExtCrystal32K(void) | |
{ | |
PMC_EnableXT32KFME(); | |
/* Select XTAL 32k instead of internal slow RC 32k for slow clock */ | |
if ( (SUPC->SUPC_SR & SUPC_SR_OSCSEL) != SUPC_SR_OSCSEL_CRYST ) { | |
SUPC->SUPC_CR = SUPC_CR_KEY_PASSWD | SUPC_CR_XTALSEL_CRYSTAL_SEL; | |
while( !(SUPC->SUPC_SR & SUPC_SR_OSCSEL) ); | |
} | |
} | |
/** | |
* \brief VROFF asserts the vddcore_nreset and stops the voltage regulator | |
* | |
*/ | |
void SUPC_DisableVoltageReg(void) | |
{ | |
SUPC->SUPC_CR |= SUPC_CR_KEY_PASSWD | SUPC_CR_VROFF; | |
} | |
/** | |
* \brief Configures supply monitor | |
* | |
*/ | |
void SUPC_ConfigSupplyMonitor(uint32_t Config) | |
{ | |
SUPC->SUPC_SMMR = Config; | |
} | |
/** | |
* \brief Disables supply monitor | |
* | |
*/ | |
void SUPC_DisableSupplyMonitor(void) | |
{ | |
SUPC->SUPC_SMMR = SUPC_SMMR_SMSMPL_SMD; | |
} | |
/** | |
* \brief Enables/Disables Brownout detector | |
* | |
*/ | |
void SUPC_BrownoutDetectEnable(uint8_t enable) | |
{ | |
if(enable) { | |
SUPC->SUPC_MR = ( SUPC_MR_BODDIS_ENABLE | SUPC_MR_KEY_PASSWD); | |
} else { | |
SUPC->SUPC_MR = ( SUPC_MR_BODDIS_DISABLE | SUPC_MR_KEY_PASSWD); | |
} | |
} | |
/** | |
* \brief Enables Brownout Detector Reset | |
* | |
*/ | |
void SUPC_BrownoutResetEnable(void) | |
{ | |
SUPC->SUPC_MR = ( SUPC_MR_BODRSTEN_ENABLE | SUPC_MR_KEY_PASSWD); | |
} | |
/** | |
* \brief Enables/Disables Sram in backup mode | |
* | |
*/ | |
void SUPC_SramBackupMode(uint8_t enable) | |
{ | |
if(enable) { | |
SUPC->SUPC_MR = ((1 << 17) | SUPC_MR_KEY_PASSWD); | |
} else { | |
SUPC->SUPC_MR = ( (0 << 17) | SUPC_MR_KEY_PASSWD); | |
} | |
} | |
/** | |
* \brief Bypass external 32.768KHz oscillator | |
* | |
*/ | |
void SUPC_BypassXtal32KOsc(void) | |
{ | |
SUPC->SUPC_MR = ( SUPC_MR_OSCBYPASS_BYPASS | SUPC_MR_KEY_PASSWD); | |
} | |
/** | |
* \brief Enables/Disables Wakeup mode | |
* | |
*/ | |
void SUPC_EnablesWakeupMode(uint32_t Regs, uint8_t enable) | |
{ | |
if(enable) { | |
SUPC->SUPC_WUMR |= Regs; | |
} else { | |
SUPC->SUPC_WUMR &= ~(uint32_t)Regs; | |
} | |
} | |
/** | |
* \brief Configure Wakeup denounce period | |
* | |
*/ | |
void SUPC_SetWakeupDebounce(uint8_t period) | |
{ | |
SUPC->SUPC_WUMR |= ( (period << SUPC_WUMR_WKUPDBC_Pos) & SUPC_WUMR_WKUPDBC_Msk); | |
} | |
/** | |
* \brief Configure Low-power denounce period | |
* | |
*/ | |
void SUPC_SetLowPowerDebounce(uint8_t period) | |
{ | |
SUPC->SUPC_WUMR |= ( (period << SUPC_WUMR_LPDBC_Pos) & SUPC_WUMR_LPDBC_Msk); | |
} | |
/** | |
* \brief Enables/Disables Wakeup Inputs | |
* | |
*/ | |
void SUPC_EnablesWakeupInput(uint32_t Input, uint8_t enable) | |
{ | |
if(enable) { | |
SUPC->SUPC_WUIR |= Input; | |
} else { | |
SUPC->SUPC_WUIR &= ~(uint32_t)Input; | |
} | |
} | |
/** | |
* \brief Checks if Crystal oscillator is selected as a slow clock | |
*/ | |
uint8_t SUPC_IsSlowClkExtCrystal32K(void) | |
{ | |
return ((SUPC->SUPC_SR & SUPC_SR_OSCSEL) >> 7); | |
} | |
/** | |
* \brief Checks if Crystal oscillator is selected as a slow clock | |
*/ | |
uint8_t SUPC_Read_Status(uint32_t status) | |
{ | |
return (SUPC->SUPC_SR & status); | |
} | |