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123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
4 years ago
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_trng.h
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* @brief TRNG Driver macros and structures.
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*
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* @addtogroup TRNG
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* @{
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*/
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#ifndef HAL_TRNG_H
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#define HAL_TRNG_H
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#if (HAL_USE_TRNG == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Driver state machine possible states.
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*/
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typedef enum {
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TRNG_UNINIT = 0, /**< Not initialized. */
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TRNG_STOP = 1, /**< Stopped. */
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TRNG_READY = 2, /**< Ready. */
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TRNG_RUNNING = 3 /**< Generating random number. */
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} trngstate_t;
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/**
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* @brief Type of a structure representing a TRNG driver.
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*/
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typedef struct hal_trng_driver TRNGDriver;
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/**
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* @brief Driver configuration structure.
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* @note It could be empty on some architectures.
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*/
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typedef struct hal_trng_config TRNGConfig;
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/* Including the low level driver header, it exports information required
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for completing types.*/
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#include "hal_trng_lld.h"
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/**
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* @brief Driver configuration structure.
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*/
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struct hal_trng_config {
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/* End of the mandatory fields.*/
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trng_lld_config_fields;
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};
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/**
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* @brief Structure representing a TRNG driver.
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*/
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struct hal_trng_driver {
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/**
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* @brief Driver state.
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*/
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trngstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const TRNGConfig *config;
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#if defined(TRNG_DRIVER_EXT_FIELDS)
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TRNG_DRIVER_EXT_FIELDS
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#endif
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/* End of the mandatory fields.*/
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trng_lld_driver_fields;
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void trngInit(void);
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void trngObjectInit(TRNGDriver *trngp);
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void trngStart(TRNGDriver *trngp, const TRNGConfig *config);
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void trngStop(TRNGDriver *trngp);
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bool trngGenerate(TRNGDriver *trngp, size_t size, uint8_t *out);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_TRNG == TRUE */
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#endif /* HAL_TRNG_H */
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/** @} */
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