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161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/**
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* \file
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*
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* \brief TRNG driver for SAM.
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*
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* Copyright (c) 2011-2012 Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. This software may only be redistributed and used in connection with an
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* Atmel microcontroller product.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* \asf_license_stop
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*
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*/
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/**
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* \defgroup group_sam_drivers_trng TRNG - True Random Number Generator
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*
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* Driver for the TRNG (True Random Number Generator). This driver provides access
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* to the main features of the TRNG controller.
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*
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* \{
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*/
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#include "../chip.h"
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/// @cond 0
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/**INDENT-OFF**/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**INDENT-ON**/
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/// @endcond
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#if SAM3XA_SERIES
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/* TRNG Security Key Value */
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#define TRNG_KEY 0x524E47
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/**
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* \brief Enable TRNG.
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*
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* \param p_trng Pointer to a TRNG instance.
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*
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*/
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void trng_enable(Trng *p_trng)
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{
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p_trng->TRNG_CR = TRNG_CR_ENABLE | TRNG_CR_KEY(TRNG_KEY);
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}
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/**
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* \brief Disable TRNG.
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*
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* \param p_trng Pointer to a TRNG instance.
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*
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*/
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void trng_disable(Trng *p_trng)
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{
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p_trng->TRNG_CR = TRNG_CR_KEY(TRNG_KEY);
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}
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/**
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* \brief Enable TRNG interrupt.
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*
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* \param p_trng Pointer to a TRNG instance.
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*
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*/
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void trng_enable_interrupt(Trng *p_trng)
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{
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p_trng->TRNG_IER = TRNG_IER_DATRDY;
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}
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/**
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* \brief Disable TRNG interrupt.
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*
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* \param p_trng Pointer to a TRNG instance.
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*
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*/
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void trng_disable_interrupt(Trng *p_trng)
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{
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p_trng->TRNG_IDR = TRNG_IER_DATRDY;
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}
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/**
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* \brief Get TRNG interrupt mask.
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*
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* \param p_trng Pointer to a TRNG instance.
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*
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* \retval The interrupt mask value.
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*/
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uint32_t trng_get_interrupt_mask(Trng *p_trng)
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{
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return p_trng->TRNG_IMR;
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}
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/**
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* \brief Get TRNG interrupt status.
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*
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* \param p_trng Pointer to a TRNG instance.
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*
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* \retval The interrupt status value.
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*/
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uint32_t trng_get_interrupt_status(Trng *p_trng)
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{
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return p_trng->TRNG_ISR;
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}
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/**
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* \brief Read TRNG output data.
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*
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* \param p_trng Pointer to a TRNG instance.
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*
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* \retval The output data value.
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*/
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uint32_t trng_read_output_data(Trng *p_trng)
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{
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return p_trng->TRNG_ODATA;
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}
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#endif // SAM3XA_SERIES
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/// @cond 0
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/**INDENT-OFF**/
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#ifdef __cplusplus
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}
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#endif
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/**INDENT-ON**/
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/// @endcond
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/**
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* \}
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*/
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