SAMV71 Xplained Ultra Software Package 1.3

supc.c

00001 /* ----------------------------------------------------------------------------
00002  *         SAM Software Package License
00003  * ----------------------------------------------------------------------------
00004  * Copyright (c) 2012, Atmel Corporation
00005  *
00006  * All rights reserved.
00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions are met:
00010  *
00011  * - Redistributions of source code must retain the above copyright notice,
00012  * this list of conditions and the disclaimer below.
00013  *
00014  * Atmel's name may not be used to endorse or promote products derived from
00015  * this software without specific prior written permission.
00016  *
00017  * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00019  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
00020  * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00022  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
00023  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00024  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00025  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
00026  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  * ----------------------------------------------------------------------------
00028  */
00029 
00030 /*----------------------------------------------------------------------------
00031  *        Headers
00032  *----------------------------------------------------------------------------*/
00033 
00034 #include "chip.h"
00035 
00036 #include <assert.h>
00037 
00038 /*----------------------------------------------------------------------------
00039  *        Local functions
00040  *----------------------------------------------------------------------------*/
00041 
00042 /**
00043  * \brief Select external 32K Crystal.
00044  *
00045  */
00046 
00047 void SUPC_SelectExtCrystal32K(void)
00048 {
00049     PMC_EnableXT32KFME();
00050     /* Select XTAL 32k instead of internal slow RC 32k for slow clock */
00051     if ( (SUPC->SUPC_SR & SUPC_SR_OSCSEL) != SUPC_SR_OSCSEL_CRYST ) {
00052         SUPC->SUPC_CR = SUPC_CR_KEY_PASSWD | SUPC_CR_XTALSEL_CRYSTAL_SEL;
00053         while( !(SUPC->SUPC_SR & SUPC_SR_OSCSEL) );
00054     }
00055 }
00056 
00057 /**
00058  * \brief VROFF asserts the vddcore_nreset and stops the voltage regulator
00059  *
00060  */
00061 void SUPC_DisableVoltageReg(void)
00062 {
00063     SUPC->SUPC_CR |= SUPC_CR_KEY_PASSWD | SUPC_CR_VROFF;
00064 }
00065 
00066 /**
00067  * \brief Configures supply monitor
00068  *
00069  */
00070 void SUPC_ConfigSupplyMonitor(uint32_t Config)
00071 {
00072     SUPC->SUPC_SMMR = Config;
00073 }
00074 
00075 
00076 /**
00077  * \brief Disables supply monitor
00078  *
00079  */
00080 void SUPC_DisableSupplyMonitor(void)
00081 {
00082     SUPC->SUPC_SMMR = SUPC_SMMR_SMSMPL_SMD;
00083 }
00084 
00085 
00086 /**
00087  * \brief Enables/Disables Brownout detector
00088  *
00089  */
00090 void SUPC_BrownoutDetectEnable(uint8_t enable)
00091 {
00092     if(enable) {
00093         SUPC->SUPC_MR = ( SUPC_MR_BODDIS_ENABLE | SUPC_MR_KEY_PASSWD);
00094     } else {
00095         SUPC->SUPC_MR = ( SUPC_MR_BODDIS_DISABLE | SUPC_MR_KEY_PASSWD);
00096     }
00097 }
00098 
00099 /**
00100  * \brief Enables Brownout Detector Reset
00101  *
00102  */
00103 void SUPC_BrownoutResetEnable(void)
00104 {
00105     SUPC->SUPC_MR = ( SUPC_MR_BODRSTEN_ENABLE | SUPC_MR_KEY_PASSWD);
00106 }
00107 
00108 
00109 /**
00110  * \brief Enables/Disables Sram in backup mode
00111  *
00112  */
00113 void SUPC_SramBackupMode(uint8_t enable)
00114 {
00115     if(enable) {
00116         SUPC->SUPC_MR = ((1 << 17) | SUPC_MR_KEY_PASSWD);
00117     } else {
00118         SUPC->SUPC_MR = ( (0 << 17) | SUPC_MR_KEY_PASSWD);
00119     }
00120 }
00121 
00122 /**
00123  * \brief Bypass external 32.768KHz oscillator
00124  *
00125  */
00126 void SUPC_BypassXtal32KOsc(void)
00127 {
00128     SUPC->SUPC_MR = ( SUPC_MR_OSCBYPASS_BYPASS | SUPC_MR_KEY_PASSWD);    
00129 }
00130 
00131 
00132 /**
00133  * \brief Enables/Disables Wakeup mode
00134  *
00135  */
00136 void SUPC_EnablesWakeupMode(uint32_t Regs, uint8_t enable)
00137 {
00138     if(enable) {
00139         SUPC->SUPC_WUMR |= Regs;
00140     } else {
00141         SUPC->SUPC_WUMR &= ~(uint32_t)Regs;
00142     }
00143 }
00144 
00145 /**
00146  * \brief Configure Wakeup denounce period
00147  *
00148  */
00149 void SUPC_SetWakeupDebounce(uint8_t period)
00150 {
00151     SUPC->SUPC_WUMR |= ( (period << SUPC_WUMR_WKUPDBC_Pos) & SUPC_WUMR_WKUPDBC_Msk);
00152 }
00153 
00154 /**
00155  * \brief Configure Low-power denounce period
00156  *
00157  */
00158 void SUPC_SetLowPowerDebounce(uint8_t period)
00159 {
00160     SUPC->SUPC_WUMR |= ( (period << SUPC_WUMR_LPDBC_Pos) & SUPC_WUMR_LPDBC_Msk);
00161 }
00162 
00163 
00164 /**
00165  * \brief Enables/Disables Wakeup Inputs
00166  *
00167  */
00168 void SUPC_EnablesWakeupInput(uint32_t Input, uint8_t enable)
00169 {
00170     if(enable) {
00171         SUPC->SUPC_WUIR |= Input;
00172     } else {
00173         SUPC->SUPC_WUIR &= ~(uint32_t)Input;
00174     }
00175 }
00176 
00177 /**
00178  * \brief Checks if Crystal oscillator is selected as a slow clock
00179  */
00180 
00181 uint8_t SUPC_IsSlowClkExtCrystal32K(void)
00182 {
00183     return ((SUPC->SUPC_SR & SUPC_SR_OSCSEL) >> 7);
00184 }
00185 
00186 /**
00187  * \brief Checks if Crystal oscillator is selected as a slow clock
00188  */
00189 
00190 uint8_t SUPC_Read_Status(uint32_t status)
00191 {
00192     return (SUPC->SUPC_SR & status);
00193 }
00194 
00195 
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