/* ---------------------------------------------------------------------------- */
/* Atmel Microcontroller Software Support */
/* SAM Software Package License */
/* ---------------------------------------------------------------------------- */
/* Copyright (c) 2015, Atmel Corporation */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following condition is 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);
}
