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-/* ---------------------------------------------------------------------------- */
-/* 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. */
-/* ---------------------------------------------------------------------------- */
-
-/** \addtogroup icm_module Working with ICM
- * \ingroup peripherals_module
- * The TWI driver provides the interface to True Random Number Generator (ICM)
- * passes the American NIST Special Publication 800-22 and Die-hard
- * Random Tests Suites.
- * The ICM may be used as an entropy source for seeding an NIST approved DRNG
- * (Deterministic RNG) as required by FIPS PUB 140-2 and 140-3. use the TWI
- * peripheral.
- *
- * \section Usage
- * <ul>
- * <li> Configures a TWI peripheral to operate in master mode, at the given
- * frequency (in Hz) using TWI_Configure(). </li>
- * <li> Sends a STOP condition on the TWI using TWI_Stop().</li>
- * <li> Starts a read operation on the TWI bus with the specified slave using
- * TWI_StartRead(). Data must then be read using TWI_ReadByte() whenever
- * a byte is available (poll using TWI_ByteReceived()).</li>
- * <li> Starts a write operation on the TWI to access the selected slave using
- * TWI_StartWrite(). A byte of data must be provided to start the write;
- * other bytes are written next.</li>
- * <li> Sends a byte of data to one of the TWI slaves on the bus using
- * TWI_WriteByte().
- * This function must be called once before TWI_StartWrite() with the first byte
- * of data to send, then it ICMll be called repeatedly after that to send the
- * remaining bytes.</li>
- * <li> Check if a byte has been received and can be read on the given TWI
- * peripheral using TWI_ByteReceived().<
- * Check if a byte has been sent using TWI_ByteSent().</li>
- * <li> Check if the current transmission is complete (the STOP has been sent)
- * using TWI_TransferComplete().</li>
- * <li> Enables & disable the selected interrupts sources on a TWI peripheral
- * using TWI_EnableIt() and TWI_DisableIt().</li>
- * <li> Get current status register of the given TWI peripheral using
- * TWI_GetStatus(). Get current status register of the given TWI peripheral, but
- * masking interrupt sources which are not currently enabled using
- * TWI_GetMaskedStatus().</li>
- * </ul>
- * For more accurate information, please look at the TWI section of the
- * Datasheet.
- *
- * Related files :\n
- * \ref twi.c\n
- * \ref twi.h.\n
- */
-/*@{*/
-/*@}*/
-
-/**
- * \file
- *
- * Implementation of True Random Number Generator (ICM)
- *
- */
-
-/*----------------------------------------------------------------------------
- * Headers
- *----------------------------------------------------------------------------*/
-
-#include "chip.h"
-
-/*----------------------------------------------------------------------------
- * Exported functions
- *----------------------------------------------------------------------------*/
-
-/**
- * \brief Enable ICM, the ICM controller is activated
- */
-void ICM_Enable(void)
-{
- ICM->ICM_CTRL = ICM_CTRL_ENABLE;
-}
-
-/**
- * \brief Disable ICM, if a region is active, this region is terminated
- */
-void ICM_Disable(void)
-{
- ICM->ICM_CTRL = ICM_CTRL_DISABLE;
-}
-
-/**
- * \brief Resets the ICM controller.
- */
-void ICM_SoftReset(void)
-{
- ICM->ICM_CTRL = ICM_CTRL_SWRST;
-}
-
-/**
- * \brief Recompute Internal hash.
- * \param region, When REHASH[region] is set to one, the region digest is
- * re-computed.
- * \note This bit is only available when Region monitoring is disabled.
- */
-void ICM_ReComputeHash(uint8_t region)
-{
- ICM->ICM_CTRL = ICM_CTRL_REHASH(region);
-}
-
-/**
- * \brief Enable region monitoring for given region
- * \param region, When bit RMEN[region] is set to one, the monitoring of Region
- * is activated.
- */
-void ICM_EnableMonitor(uint8_t region)
-{
- ICM->ICM_CTRL = ICM_CTRL_RMEN(region);
-}
-
-/**
- * \brief Disable region monitoring for given region
- * \param region, When bit RMDIS[region] is set to one, the monitoring of
- * Region is disabled.
- */
-void ICM_DisableMonitor(uint8_t region)
-{
- ICM->ICM_CTRL = ICM_CTRL_RMDIS(region);
-}
-
-/**
- * \brief Configures an ICM peripheral with the specified parameters.
- * \param mode Desired value for the ICM mode register (see the datasheet).
- */
-void ICM_Configure(uint32_t mode)
-{
- ICM->ICM_CFG = mode;
-}
-
-/**
- * \brief Enables the selected interrupts sources on a ICM peripheral.
- * \param sources Bitwise OR of selected interrupt sources.
- */
-void ICM_EnableIt(uint32_t sources)
-{
- ICM->ICM_IER = sources;
-}
-
-/**
- * \brief Disables the selected interrupts sources on a ICM peripheral.
- * \param sources Bitwise OR of selected interrupt sources.
- */
-void ICM_DisableIt(uint32_t sources)
-{
- ICM->ICM_IDR = sources;
-}
-
-/**
- * \brief Get the current interrupt status register of the given ICM peripheral.
- * \return ICM status register.
- */
-uint32_t ICM_GetIntStatus(void)
-{
- return ICM->ICM_ISR;
-}
-
-/**
- * \brief Get the current status register of the given ICM peripheral.
- * \return ICM status register.
- */
-uint32_t ICM_GetStatus(void)
-{
- return ICM->ICM_SR;
-}
-
-
-/**
- * \brief Get the undefined access status register of the given ICM peripheral.
- * \return ICM status register.
- */
-uint32_t ICM_GetUStatus(void)
-{
- return ICM->ICM_UASR;
-}
-
-/**
- * \brief Set descriptor area start address register.
- * \param addr start address
- * \note The start address is a multiple of the total size of the data structure
- * (64 bytes).
- */
-void ICM_SetDescStartAddress(uint32_t addr)
-{
- ICM->ICM_DSCR = addr;
-}
-
-/**
- * \brief Set hash area start address register.
- * \param addr start address
- * \note This field points at the Hash memory location. The address must be a
- * multiple of 128 bytes.
- */
-void ICM_SetHashStartAddress(uint32_t addr)
-{
- ICM->ICM_HASH = addr;
-}
-
-/**
- * \brief Set ICM user initial Hash value register.
- * \param val Initial Hash Value
- */
-void ICM_SetInitHashValue(uint32_t val)
-{
- ICM->ICM_UIHVAL[0] = ICM_UIHVAL_VAL(val);
-}
-
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