| /* ---------------------------------------------------------------------------- | |
| * 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 conditions are 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. | |
| * ---------------------------------------------------------------------------- | |
| */ | |
| #ifndef _TRNG_H_ | |
| #define _TRNG_H_ | |
| /*------------------------------------------------------------------------------ | |
| * Headers | |
| *------------------------------------------------------------------------------*/ | |
| #include <stdint.h> | |
| #include "chip.h" | |
| /*------------------------------------------------------------------------------ | |
| * Types | |
| *------------------------------------------------------------------------------*/ | |
| typedef void (*trng_callback_t)(uint32_t random_value, void* user_arg); | |
| /*------------------------------------------------------------------------------ | |
| * Exported functions | |
| *------------------------------------------------------------------------------*/ | |
| /** | |
| * \brief Enables the TRNG. | |
| */ | |
| extern void trng_enable(void); | |
| /** | |
| * \brief Disables the TRNG. | |
| */ | |
| extern void trng_disable(void); | |
| /** | |
| * \brief Enable the TRNG interrupt, the callback will be called for each new | |
| * generated random value. | |
| * | |
| * \param cb user callback | |
| * \param user_arg user argument passed as-is to the callback | |
| */ | |
| extern void trng_enable_it(trng_callback_t cb, void* user_arg); | |
| /** | |
| * \brief Disable the TRNG interrupt. | |
| */ | |
| extern void trng_disable_it(void); | |
| /** | |
| * \brief Get the next random value generated by the TRNG. This function will | |
| * block until a value is available. | |
| * \return a random value | |
| */ | |
| extern uint32_t trng_get_random_data(void); | |
| #endif /* _TRNG_H_ */ |