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Diffstat (limited to 'atmel-samd/asf4/samd51/hal/src/hal_rand_sync.c')
| -rw-r--r-- | atmel-samd/asf4/samd51/hal/src/hal_rand_sync.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/atmel-samd/asf4/samd51/hal/src/hal_rand_sync.c b/atmel-samd/asf4/samd51/hal/src/hal_rand_sync.c new file mode 100644 index 000000000..927bdbeba --- /dev/null +++ b/atmel-samd/asf4/samd51/hal/src/hal_rand_sync.c @@ -0,0 +1,132 @@ +/** + * \file + * + * \brief Generic Random Number Generator (RNG) functionality declaration. + * + * Copyright (C) 2015 Atmel Corporation. All rights reserved. + * + * \asf_license_start + * + * \page License + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. The name of Atmel may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 4. This software may only be redistributed and used in connection with an + * Atmel microcontroller product. + * + * 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 + * EXPRESSLY AND SPECIFICALLY 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. + * + * \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; +} |