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110 lines
3.7 KiB
110 lines
3.7 KiB
4 years ago
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/**
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* \file
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*
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* \brief Random Number Generator (RAND) related functionality declaration.
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*
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* Copyright (C) 2015 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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#ifndef _HPL_RAND_SYNC_H_INCLUDED
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#define _HPL_RAND_SYNC_H_INCLUDED
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#include <compiler.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Random Number Generator polling device. */
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struct _rand_sync_dev {
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/** Pointer to private data or hardware base */
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void *prvt;
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/** Number of bits generated for each read operation */
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uint8_t n_bits;
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};
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/**
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* \brief Initialize the Random Number Generator Driver
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* \param[out] dev Pointer to the device instance struct
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* \param[in, out] hw Pointer to the hardware for device instance
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* \return Initialization operation result status, 0 for OK.
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*/
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int32_t _rand_sync_init(struct _rand_sync_dev *const dev, void *const hw);
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/**
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* \brief Deinitialize the Random Number Generator Driver
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* \param[in, out] dev Pointer to the device instance struct
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*/
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void _rand_sync_deinit(struct _rand_sync_dev *const dev);
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/**
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* \brief Enable the Random Number Generator Driver
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* \param[out] dev Pointer to the device instance struct
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* \return Enable operation result status, 0 for OK.
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*/
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int32_t _rand_sync_enable(struct _rand_sync_dev *const dev);
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/**
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* \brief Disable the Random Number Generator Driver
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* \param[out] dev Pointer to the device instance struct
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*/
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void _rand_sync_disable(struct _rand_sync_dev *const dev);
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/**
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* \brief Set seed for the Random Number Generator Driver
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* \param[out] dev Pointer to the device instance struct
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* \param[in] seed The seed to set
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* \return Operation result
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* \retval ERR_NONE Operation complete success
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* \retval ERR_UNSUPPORTED_OP Seed not supported
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*/
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int32_t _rand_sync_set_seed(struct _rand_sync_dev *const dev, const uint32_t seed);
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/**
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* \brief Polling random number until it's read back
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* \param[in] dev Pointer to the device instance struct
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* \return The random number value
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*/
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uint32_t _rand_sync_read_one(const struct _rand_sync_dev *const dev);
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#ifdef __cplusplus
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}
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#endif
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/**@}*/
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#endif /* _HPL_RAND_SYNC_H_INCLUDED */
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