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63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/**
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******************************************************************************
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* @file platform_rng.c
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* @author William Xu
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* @version V1.0.0
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* @date 05-May-2014
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* @brief This file provide RNG driver functions.
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******************************************************************************
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* UNPUBLISHED PROPRIETARY SOURCE CODE
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* Copyright (c) 2016 MXCHIP Inc.
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*
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* The contents of this file may not be disclosed to third parties, copied or
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* duplicated in any form, in whole or in part, without the prior written
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* permission of MXCHIP Corporation.
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******************************************************************************
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*/
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#include "platform_peripheral.h"
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#include "platform.h"
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/******************************************************
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* Macros
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******************************************************/
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/******************************************************
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* Enumerations
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******************************************************/
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/******************************************************
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* Type Definitions
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******************************************************/
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/******************************************************
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* Structures
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******************************************************/
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/******************************************************
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* Variables
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******************************************************/
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/******************************************************
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* Function Declarations
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******************************************************/
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OSStatus platform_random_number_read( void *buf, int num )
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{
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hal_trng_init();
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uint16_t word_bytes = num / 4;
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uint8_t remain_bytes = num % 4;
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uint32_t random_num;
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uint32_t *word_ptr = (uint32_t*)buf;
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while(word_bytes--){
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hal_trng_get_generated_random_number(&random_num);
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*word_ptr++ = random_num;
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}
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hal_trng_get_generated_random_number(&random_num);
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memcpy(word_ptr, &random_num, remain_bytes);
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hal_trng_deinit();
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return kNoErr;
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}
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