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/**
* \file
*
* \brief Generic Random Number Generator (RNG) functionality declaration.
*
* Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
*
* \asf_license_start
*
* \page License
*
* Subject to your compliance with these terms, you may use Microchip
* software and any derivatives exclusively with Microchip products.
* It is your responsibility to comply with third party license terms applicable
* to your use of third party software (including open source software) that
* may accompany Microchip software.
*
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
*
* \asf_license_stop
*
*/
#include <utils.h>
#include "hal_rand_sync.h"
#define HAL_RNG_SYNC_VERSION 0x00000001u
int32_t rand_sync_init(struct rand_sync_desc *const desc, void *const hw)
{
ASSERT(desc);
return _rand_sync_init(&desc->dev, hw);
}
void rand_sync_deinit(struct rand_sync_desc *const desc)
{
ASSERT(desc);
_rand_sync_deinit(&desc->dev);
}
int32_t rand_sync_enable(struct rand_sync_desc *const desc)
{
ASSERT(desc);
return _rand_sync_enable(&desc->dev);
}
void rand_sync_disable(struct rand_sync_desc *const desc)
{
ASSERT(desc);
_rand_sync_disable(&desc->dev);
}
int32_t rand_sync_set_seed(struct rand_sync_desc *const desc, const uint32_t seed)
{
ASSERT(desc);
return _rand_sync_set_seed(&desc->dev, seed);
}
/**
* \brief Read data bits
*/
static uint32_t _rand_sync_read_data(const struct _rand_sync_dev *dev, const uint8_t n_bits)
{
uint8_t r_bits = (dev->n_bits < 1) ? 32 : dev->n_bits;
if (r_bits < n_bits) {
uint8_t i;
uint32_t d = 0;
/* Join read bits */
for (i = 0; i < n_bits; i += r_bits) {
d |= (uint32_t)(_rand_sync_read_one(dev) << i);
}
return d;
} else {
return _rand_sync_read_one(dev);
}
}
uint8_t rand_sync_read8(const struct rand_sync_desc *const desc)
{
ASSERT(desc);
return (uint8_t)_rand_sync_read_data(&desc->dev, 8);
}
uint32_t rand_sync_read32(const struct rand_sync_desc *const desc)
{
ASSERT(desc);
return (uint32_t)_rand_sync_read_data(&desc->dev, 32);
}
void rand_sync_read_buf8(const struct rand_sync_desc *const desc, uint8_t *buf, uint32_t len)
{
uint32_t i;
ASSERT(desc && (buf && len));
for (i = 0; i < len; i++) {
buf[i] = (uint8_t)_rand_sync_read_data(&desc->dev, 8);
}
}
void rand_sync_read_buf32(const struct rand_sync_desc *const desc, uint32_t *buf, uint32_t len)
{
uint32_t i;
ASSERT(desc && (buf && len));
for (i = 0; i < len; i++) {
buf[i] = (uint32_t)_rand_sync_read_data(&desc->dev, 32);
}
}
uint32_t rand_sync_get_version(void)
{
return HAL_RNG_SYNC_VERSION;
}
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