diff options
Diffstat (limited to 'watch-library/hardware/hal/src/hal_rand_sync.c')
-rwxr-xr-x | watch-library/hardware/hal/src/hal_rand_sync.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/watch-library/hardware/hal/src/hal_rand_sync.c b/watch-library/hardware/hal/src/hal_rand_sync.c new file mode 100755 index 00000000..8b29ed1b --- /dev/null +++ b/watch-library/hardware/hal/src/hal_rand_sync.c @@ -0,0 +1,122 @@ +/** + * \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; +} |